CIDCO OF MAHARASHTRA LIMITED . Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12 CITY & INDUSTRIAL DEVELOPMENT CORPORATION OF MAHARASHTRA LIMITED Name of Work : Realignment of 36.0 M wide road in Sector-5, near existing ROB at Dronagiri. C.A. No. : 06/CIDCO/EE(DRON-I)/2011-12 Due On : 29/05/2012 to 30/05/2012 on website cidco.maharashtra.etenders.in Price : Rs.10,000/- (Rupees Ten Thousand only) (Non refundable) OFFICE THE CHIEF ENGINEER & GENERAL MANAGER (TECH) CIDCO OF MAHARASHTRA LIMITED, 3 RD FLOOR, CIDCO BHAVAN, CBD-BELAPUR, NAVI MUMBAI.
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CIDCO OF MAHARASHTRA LIMITED. Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12
0
CITY & INDUSTRIAL DEVELOPMENT CORPORATION OF
MAHARASHTRA LIMITED
Name of Work : Realignment of 36.0 M wide road in Sector-5, near existing ROB
at Dronagiri.
C.A. No. : 06/CIDCO/EE(DRON-I)/2011-12
Due On : 29/05/2012 to 30/05/2012 on website
cidco.maharashtra.etenders.in
Price : Rs.10,000/- (Rupees Ten Thousand only)
(Non refundable)
OFFICE
THE CHIEF ENGINEER & GENERAL MANAGER (TECH)
CIDCO OF MAHARASHTRA LIMITED,
3RD FLOOR, CIDCO BHAVAN,
CBD-BELAPUR, NAVI MUMBAI.
CIDCO OF MAHARASHTRA LIMITED. Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12
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Name of Work : Construction / Upgradation of 36 M. wide road (one carriageway) leading to coastal road Dronagiri, Navi Mumbai. (upto 1st stage)
INDEX Sr. No.
Description Sl. Pg. No.
1. Index 1 2
2. Tender Notice 3 7
3. Tendering Programme 8 8
4. Notice of Tender & Instructions to the Tenderers 9 18
5. Undertaking for Submission of Tender 19 22
6. Special Conditions of Contract 23 31
7. Proforma of :
a) Contract Agreement 32 35
b) Bank Guarantee in Lieu of Contract Deposit 36 39
c) Indenture Bond 40 44
d) Promissory Note 45 45
e) Indemnity Bond 46 47
f) Bank Guarantee in Lieu of E.M.D. 48 51
g) Affidavit for Preservation of Mangroves 52 53
h) Agreeing to General Conditions of Contract 54 54
8. General Conditions of Contract 55 170
9. Notes & Preambles to Schedule of Rates & Quantities (Schedule “A”)
171 176
10. Schedule “A” (Bill of Quantities) 177 201
11. Annexure “A” 202 203
12. Schedule “B” 204 204
13. General Specifications 205 205
CIDCO OF MAHARASHTRA LIMITED. Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12
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Sr. No.
Description Sl. Pg. No.
14. Particular Specifications 206 328
15. Checklist for Ready Mix Concrete 329 335
16. Annexure-I 336 337
17. List of Approved Makes / Brands of Materials 338 338
18. List of Drawings 339 339
19. Drawings 340 345
20. Corrigendum if any --
Signature of Tenderer Chief Engineer & General Manager (Tech.)
Date : Date :
CIDCO OF MAHARASHTRA LIMITED. Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12
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TENDER NOTICE TENDER NOTICE PUBLISHED IN DAILY MARATHI NEWSPAPER
NOTE : 1) Submission of original Demand Draft towards cost of tender document, original EMD
documents (Demand Draft / Bank Guarantee) and undertaking for submission of tender on 04.06.2012 during office hours in the office of Executive Engineer (DRON-I), CIDCO Ltd., CIDCO Nodal Office, Sector –14, Bokadvira, Navi Mumbai-400 702.
2) Tenderer may attend financial bid opening as mentioned above. No separate intimation will be given regarding tender opening.
Chief Engineer & General Manager(Tech.) CIDCO LTD.
CIDCO OF MAHARASHTRA LIMITED. Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12
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NOTICE OF TENDER AND INSTRUCTIONS TO TENDERERS
Name of Work : Realignment of 36.0 M wide road in Sector-5, near existing ROB at Dronagiri.
1.0 TENDER DOCUMENTS
The tender should attach scanned copies of attested documents in PDF
format for “ON-LINE” submission.
2.0 DOWNLOAD OF BLANK TENDER FORM
Contractors intending to download tender for the work shall first get
pre-qualified for the work by applying ON-LINE for prequalification
and attached all relevant documents required by the Employer. Only
those contractors short listed / pre-qualified shall be able to download
the tender document. The right to decide whether a contractor/firm
fulfils the requirements for download tender forms, rests entirely with
the Tender issuing authority of the Employer.
3.0 EARNEST MONEY
The tenderer shall deposit and keep deposited (for the period specified
hereafter) with CIDCO a sum as shown in this tender notice as the
Earnest money. The Earnest Money shall be deposited in one of the
following forms.
(i) By Demand Draft in favour of CIDCO Limited payable at Mumbai.
(ii) By an irrevocable and unconditional Bank Guarantee executed by a
Nationalised/Scheduled Bank approved by CIDCO located either in
Mumbai or in Navi Mumbai in the form prescribed and valid for 180
days from the last date prescribed for submission of tender.
CIDCO OF MAHARASHTRA LIMITED. Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12
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E.M.D. in form of irrevocable, unconditional Bank Guarantee will be
accepted only if, E.M.D. amount payable is equal or more than
Rs. 1.00 Lac in the cases where Estimated Cost put to Tender is equal or
more than Rs. 100.00 Lacs.
FIXED EMD : The agencies who are eligible to quote the tenders based
on CIDCO Registration and availing the facility of EMD Exemption by
depositing requisite amount with CIDCO Ltd., are required to pay the
difference in amount of EMD fixed for the present tender and amount
already deposited with CIDCO Ltd., for availing the facility of EMD
exemption. The tenderer shall upload the same and also submit attested
copy of valid EMD exemption certificate issued by Executive Engineer(NM),
CIDCO Ltd. to the tender issuing authority prior to opening of financial
bids.
The tenderers who are eligible for issue of tender document on the basis
of registration other than CIDCO registration, shall not be eligible for
availing the facility of EMD Exemption and shall pay full EMD amount.
Tenderers are required to submit the Tender Fee of Rs.10,000/- (Rupees
Ten Thousand Only) (Non-refundable) by way of separate demand draft
drawn in favour of “CIDCO Ltd.” payable at Mumbai / Navi Mumbai and
the same should necessarily be scanned and uploaded in PDF format for
downloading the on-line Tender Document.
The scanned copy of the valid E.M.D. documents of appropriate amount
in PDF format shall be uploaded along with submission of on-line tender.
Original Demand Draft towards cost of tender document, original EMD
documents (Demand draft/Bank Guarantee) and undertaking for
submission of tender shall be submitted in sealed envelope as prescribed
in tendering programme. Financial bid will not be opened till the above
CIDCO OF MAHARASHTRA LIMITED. Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12
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documents are submitted. in no case the cost of tender document should
be clubbed with E.M.D. amount.
3.1 The failure or omission to deposit or keep deposited the Earnest Money
shall disqualify the tenderer for that tender.
3.2 No interest shall be payable by CIDCO in respect of such deposited
Earnest Money.
3.3 The Earnest Money of an unsuccessful tenderer shall be refunded after the
final decision on the tenders or on expiry of the validity period whichever
is earlier on presenting receipt thereof.
3.4 a) Invitation by CIDCO to submit the tender shall be a proposal and the
submission of a tender by the tenderer shall be an acceptance of such
proposal to win the contract. The tenderer shall not revoke his tender
or vary its terms and conditions without the consent of CIDCO during
the period of 120 days counted from the last day appointed by
CIDCO for submission of tenders. If the tenderer shall revoke the
tender or vary its terms or condition contrary to his promise to abide
by this condition, the Earnest Money Deposited by him shall stand
forfeited to CIDCO without prejudice to its other rights and remedies.
Without prejudice to the foregoing clause, the tenderer shall be
disentitled to submit a tender to CIDCO for execution of any civil work
during the next 24 months effective from the date of such revocation
or variations of the terms and conditions of the tender.
b) The authorized signatory of the lowest tenderer shall duly sign with
their company seal on each page of the hard copy of the tender
documents prepared, within 7 (Seven) working days after issue of
Letter of Acceptance (LOA).
CIDCO OF MAHARASHTRA LIMITED. Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12
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3.5 If CIDCO shall accept the tender and signify such acceptance to the
tenderer, the Earnest Money so deposited with CIDCO by Demand Draft
shall be appropriated towards Performance Security payable by the
contractor in accordance with Condition No. 10.1 of the General
Conditions of contract.
3.6 If the tenderer has deposited the Earnest Money by a Bank Guarantee
and he has been communicated the acceptance of his tender by CIDCO
and if he fails or omits to furnish the Contract Deposit within 15 days in
accordance with condition No.10.1.1 of the General Conditions of
contract, CIDCO shall be entitled to encash the Bank Guarantee.
3.7 In case of the successful tenderer, on payment of the required amount
of the Contract Deposit, the Earnest Money Deposited in the form of
Bank Guarantee/Demand Draft/pay order shall be refundable to the
tenderer in the event of CIDCO deciding the award of the contract.
3.8.1 The E.M.D. of the successful tenderers shall be forfeited if he
withdraws/revokes his offer or modifies/changes the same during the
validity of the tender, or if after the acceptance of his tender, the
contractor fails or neglects to furnish the balance Contract Deposit
within 15 days.
3.8.2 The E.M.D. of the successful tenderer shall be entitled for forfeiture if
he fails to execute contract agreement within 15 days from the date of
issue of Work Order.
3.8.3 The E.M.D. of the successful tenderer shall be entitled for forfeiture if
he fails to commence; the work within 30 days from the date of issue
of Letter of Acceptance.
3.8.4 The tenderers may also be dis-qualified for tendering for further works
in CIDCO as provided in foregoing Clause No. 3.4 on Sl. Pg No. 11.
CIDCO OF MAHARASHTRA LIMITED. Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12
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4.0 INTERPRETATION OF CONDITIONS OF CONTRACT
The tenderer shall be deemed to have studied all plans, specifications,
terms & conditions of tender and visited the site of work and made
himself acquainted with the site conditions, availability of labour, basic
materials, water, electricity, approach road to site etc., before on-line
submission of tender, whether the tenderer inspect them or not.
The tenderer shall be deemed to have made independent enquiries
about probable taxes leviable by the local civic authority or the
Government. The ignorance about probable taxes to be paid either to
the local civic authority or to the government shall not be considered as
an excuse. The percentage quoted by tenderer shall be deemed to
include all the taxes, octroi, duties, royalties, etc. payable under the
rules to local civic authority, and / or Government / Statutory body.
On-line submission of Tender implies that tenderer has read these
conditions and other contract documents of the tender as well as the
conditions of the tender and as made himself aware of the same as
also about the condition and other factors having bearing on the
execution of the order.
In case of difference of opinion or dispute regarding the interpretation
of tender conditions, the interpretation of any of the conditions by
Chief Engineer & General Manager (Tech.) of CIDCO Limited shall be
final and binding on the tenderer.
5.0 BLANK TENDER FORM :
Blank tender form will be downloaded from the website. Any other
additional information and/or clarification can be had from the
office of Superintending Engineer (DRON), 5th Floor, Raigad Bhavan,
CBD-Belapur, Navi Mumbai on all working days during the office
hours.
CIDCO OF MAHARASHTRA LIMITED. Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12
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6.0 METHOD OF SUBMISSION OF TENDER :
The complete tenders submission, “ON-LINE” on the website
cidco.maharashtra.etenders.in can be made only after payment of
requisite fee through payment gateway of the service provider by
prequalified tenderers.
6.1 Tender should be submitted through website
http://cidco.maharashtra.etenders.in and ON-LINE only.
6.2 Late tender offers : Tender’s grievance/ complaint on account of non
submission of tender due to problem in internet, electricity or any other
reason will not be considered.
7.0 METHOD OF OPENING OF TENDER
On the time specified in the tender programme, the tender will be
opened in the presence of tenderers / their representative through
e-tendering procedure at Training Centre, 3rd Floor, CIDCO Bhavan,
CBD Belapur, Navi Mumbai.
CIDCO reserves the right to reject any or all offers. CIDCO is not
bound to give any reason for not considering such offers.
8.0 VALIDITY OF TENDER
Validity of tender shall be 120 days from the specified date of receipt
of tender by CIDCO & there after until it is withdrawn by notice in
writing duly addressed to the authority opening the tender. Such
withdrawal by CIDCO will be effective from the date of receipt of
notice by the tender opening authority.
CIDCO OF MAHARASHTRA LIMITED. Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12
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9.0 IMPORTANT POINTS TO BE NOTED BY THE TENDERER
a) The ON-LINE submission of tender document should be done on
website by the eligible contractors as per tender programme. The
tenderer has to quote only the percentage in figures. The
percentage in words as also the total quoted amount in figures is
worked out automatically on the web page.
b) The price-bid (percentage) shall be inclusive of all taxes, octroi,
levies duties etc. to be paid by the tenderer for the work and claim
for extra payment on any such account shall not be entertained.
c) Tenderer shall deemed to have studied all plans, specifications,
terms and made himself/themselves acquainted with the site and
availability etc. before submitting the tender.
d) At any time prior to the deadline for sale of tender, the Employer
may amend the tender documents by issuing Corrigendum.
e) Any corrigendum as well as clarification thus issued shall be a part
of the tender documents and it will be assumed that the information
contained in the amendment have been taken into account by the
tenderer while submitting the tender.
f) To give prospective tenderers reasonable time in which to take the
amendment into account in preparing their tenders, the Employer
shall extend, at its discretion, the deadline for submission of
tenders, in which case, the Employers will notify all tenderers by
placing it on website of the extended deadline and the same will be
binding on them.
g) The Employer is not bound to accept the lowest or any tender. The
Employer reserves the right to reject any or all tenders received
without assigning any reasons whatsoever.
CIDCO OF MAHARASHTRA LIMITED. Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12
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h) This detailed tender notice shall form part of tender documents.
i) Income Tax as applicable on gross bill at percentage that will be in
force form time to time will be recovered from the contractor’s bills,
for all payment including advances.
j) The successful tenderer is required to execute an agreement on
stamp paper of appropriate value in duplicate in the proforma
attached with the tender documents. The agreement shall be signed
within a period of 30 days from date of acceptance of the tender.
10.0 ACCEPTANCE OF TENDER
Acceptance of tender on behalf of the Employer shall be done by an
officer to whom the powers are delegated by the Management.
11.0 EXECUTION OF CONTRACT AGREEMENT :
The successful tenderer is required to execute a contract agreement in
duplicate in the form attached with the tender documents on stamp
paper of proper value. The proper value at present is Rs. 100/-.
The contract agreement should be signed within 30 days from the date
of acceptance of the tender.
12.0 The successful tenderer will be required to produce to the satisfaction of
the Chief Engineer & General Manager (Tech), a valid contract labour
license issued in his favour under the provision of the contract labour
(Regulation and Abolition) Act, 1970, before starting the work. On
failure to do so, the acceptance of the tender is liable to be withdrawn
and also the earnest money is liable to be forfeited.
13.0 The Contractor shall pay the Contract Sales Tax and turnover tax etc.
directly to the Government. CIDCO shall not take any responsibility for
any kind of tax payment to the Government at any point of time.
CIDCO OF MAHARASHTRA LIMITED. Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12
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13.1 Under Inter-state Migrant Workmen Act and/or Contract Labour Act,
the Contractor should obtain requisite license / registration Certificate
under the Act while engaging the migrant labour from other State.
14.0 Wherever the tender is silent about the specifications, the work shall be
executed as per the Standard Specifications from PWD, Indian
Standard Specifications (Latest Version) for relevant items and
specifications of the Ministry of Road Transport & Highways and all
specifications of materials and workmanship.
15.0 SPLITTING OF WORK
CIDCO reserves the right to suitably increase/reduce the scope of work
put to this tender. The right to split up the work in two or more parts is
reserved by the Employer and also the right to award the work to more
than one agency is reserved. The contractor shall have no claims
whatsoever on this account.
16.0 SPARE CAPACITY OF WORK FOR TENDERING:
The tenderer shall be eligible to submit the tender to CIDCO subject to
the essential condition that the price tendered by him together with the
value of the outstanding works under execution by him for CIDCO or
any other employer shall not be more than four times the value of the
average annual turnover of works executed during the preceding three
financial years.
16.1 The tenderer shall furnish truly & faithfully the foregoing information by
an Affidavit on a Non-Judicial stamp paper of Rs.100/-. If any
information so furnished shall be found to be untrue or false, the
tender shall be liable to be dis-qualified and the Earnest
Money/Performance Security as the case may be accompanying such
CIDCO OF MAHARASHTRA LIMITED. Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12
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tender shall stand forfeited to CIDCO. If the information so furnished
shall be found to untrue or false during the currency of the contract, the
tenderer shall be held to be in default and the contract if any awarded
to him shall be liable to be terminated with its consequences.
17.0 Notice of tender and these instructions shall form part of the contract.
Signature of Tenderer Chief Engineer & General Manager (Tech.)
Date : Date :
CIDCO OF MAHARASHTRA LIMITED. Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12
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UNDERTAKING FOR SUBMISSION OF TENDER
From : ____________________________
____________________________
To,
The Additional Chief Engineer (I&NT)
CIDCO of Maharashtra Limited,
3rd Floor, CIDCO Bhavan,
CBD-Belapur, Navi Mumbai.
Name of Work : Realignment of 36.0 M wide road in Sector-5, near existing ROB
at Dronagiri.
C.A. No. : 06/CIDCO/EE(DRON-I)/2011-12
Sir,
1) I/We M/s. __________________________________________ hereby tender for
(Name of Work) on the terms and conditions set out their.
The contractor has applied to the Employer that he be allowed advances on the
materials (hereinafter called the ‘said Material’) absolutely belonging to him and
brought by him to the site of the works for use in construction of such of the works
as he had undertaken to execute at stipulated rates, AND of aforesaid nature. The
security of the quantities and other particulars of the materials for which the
advances are being made in the Monthly Payments, will be the sole responsibility of
the Contractor.
NOW THIS INDENTURE WITNESSTH THAT IN PURSUANCE OF THE SAID
CONTRACT and in consideration of the sum of Rs.________________ paid on or
before the execution of these presents to the contractor by the Employer and of the
such further advance (if any) as may be made to him as aforesaid, the Contractor
hereby covenant and agree with the Employer and declares as follows:
CIDCO OF MAHARASHTRA LIMITED. Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12
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1. That the said sum so advanced by the Employer to the Contractor as
aforesaid and all or any further sum or sums advanced as aforesaid shall
be used by the contractor in or towards expediting the execution of the
said works and for no other purpose whatsoever.
2. That the said materials which have been offered to and accepted by the
Employer for advances on material, is absolutely the Contractor’s own
property and free from encumbrances of any kind and the contractor shall
not make any application or receive a further advance from the Employer
on the same materials. The contractor indemnifies the Employer against
all claims to any material in respect of which an advance has been made
to him as aforesaid.
3. That the said materials and all other materials on the security of which any
further advances may hereafter be made as aforesaid shall be used by the
Contractor solely in the execution of the said works in accordance with the
direction of the Engineer (hereinafter called ‘the Engineer’) and in terms of
the said contract.
4. That the contractor shall make at his own cost all necessary and adequate
arrangements for the proper watch, safe custody and protection against
all risks of the said materials in the contractor’s custody and on his own
responsibility and shall at times be open to inspection by the Engineer or
any officer authorised by him. In the event of the said materials or any
part thereof being stolen, destroyed, or damaged, the contractor shall
forthwith replace the same with other materials of like quantity or repair
and make good the same as required by the Engineer.
CIDCO OF MAHARASHTRA LIMITED. Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12
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5. The above said materials shall not on any account be removed from the
site except with the written permission of the Engineer or any officer
authorised by him on that behalf.
6. That the advance shall be repayable in full when or before the contractor
receives the payment from the Employer on the price payable to him for
the said works under the contract provided that if any intermediate
payment are made to the contractor on account of work done, when on
the occasion of such payment the Employer will be at liberty to make a
recovery from the Contractor’s payment, for such payment by deducting
therefrom the value of the said materials actually used in the construction
and in respect of which recovery has not been made previously. The
value for the purpose of recovery has not been made previously. The
value for the purpose of recovery shall be at the rates at which the
advances were calculated.
7. That if the Contractor shall at any time make any default in the
performance of observance in any respect of any of their terms and
provisions of the said contract or of the said contract or of these presents,
the total amount of the advance or advances that may still be owing to the
Employer shall be immediately on the happening of such default be
repayable by the contractor to the Employer together with interest rate per
annum as prevailing from the date of the respective dates of such advance
or advances, to the date of repayment and with all costs, charges,
damages and expenses incurred by the Employer in or for the recovery
thereof or the enforcement of this security or otherwise be reasons of the
default of the contractor and the contractor hereby covenants and agrees
with the Employer to repay the same respectively to the Employer
accordingly.
CIDCO OF MAHARASHTRA LIMITED. Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12
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8. That the contractor hereby hypothecates all the said materials with the
repayment to the Employer of the said sum so advanced and any further
sum or sums, advance as aforesaid all costs, damage and expenses
payable under these presents provided always and it is hereby agreed and
declared that notwithstanding anything in the said agreement and without
prejudice to the powers contained therein shall become enforceable and
the money shall not be paid in accordance with, the Employer may at any
time thereafter adopt all or any of the following courses as he may deem
fit.
(a) Seize and utilise the said materials or any part thereof in the
completion of the said works on behalf of the contractor in
accordance debiting the contractor with the value of the work done
as if he had carried it out in accordance with the said contract and
the rates thereby provided. If the balance is against the contractor,
he is to pay same to the Employer on demand.
(b) Remove and sell by public auction the seized materials or any part
thereof and out of the money arising from the sale retain all the
sum aforesaid repayable or payable to the Employer under these
presents and pay over the surplus (if any) to the Contractor.
(c) Deduct all or any part of the money owning out of Performance
Security of any sum due to the contractor under the said contract.
9. That except in the event of such default on the part of the contractor as
aforesaid interest on the said advance shall not be payable.
10. The Contractor shall execute a promissory note for a sum of
Rs.________________ only in favour of the Employer to provide a collateral
security for the repayment of the advance made to the contractor.
CIDCO OF MAHARASHTRA LIMITED. Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12
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IN WITNESS WHEREOF THE _________________________________ and City &
Industrial Development Corporation of Maharashtra Limited have hereby put their
respective hands the day and year first above written.
SIGNED SEALED AND DELIVERED ) BY THE SAID CONTRACTOR IN ) THE PRESENCE OF ) ) SIGNATURE OF
CONTRACTOR
WITNESSES :
1.
2.
SIGNED SEALED AND DELIVERED ) BY AND FOR AND ON BEHALF OF ) CITY & INDUSTRIAL DEVELOPMENT ) CORPORATION OF MAHARASHTRA ) LIMITED ) IN THE PRESENCE OF WITNESSES )
ENGINEER
CIDCO OF MAHARASHTRA LIMITED. Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12
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PROMISSORY NOTE (on stamp paper of Rs.100/-)
In terms of para 10 of Indenture Bond we agree to pay a sum of Rs._____________
1) It is compulsory to fill the amount both in words and figures. 2) This is to confirm that I have read carefully instruction No. 3.8.1 to 3.8.4 on
Sl.Pg.No. 12 of the Tender and I understand that my tender is liable to be rejected if I fail to submit the offer in accordance with the various provisions and do not comply with the stipulations.
3) I, understand that my tender is liable to be rejected if I fail to fill the amount both in words and figures.
Signature of Tenderer Chief Engineer & General Manager (Tech.)
Date : Date :
CIDCO OF MAHARASHTRA LIMITED. Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12
202
A N N E X U R E - ‘A’
Name of Work : Realignment of 36.0 M wide road in Sector-5, near existing ROB
at Dronagiri.
Revised G.C.C.
Clause No.
1.1(a)(iv) The Engineer for the Contract : Name : Shri. Manjit Singh Designation : Executive Engineer (Dron-I)
43.1 Time for completion (inclusive of monsoon)
A. Contract as whole : 12 (Twelve) Months (including Monsoon)
B. Sections (Part of Groups of Items) i) ii)
: Not Applicable
49.1 Defect Liability period i) ii)
: : :
12 (Twelve) Months
49.4 Percentage to be charged as
supervision charges for the work
got executed through other means
: 24.5%
60.10 The rate of interest applicable for
payment delayed
: 6% p.a.
70.1 i) Centre for Price Variation Indices
: Mumbai
ii) Price Variation Clause Factors
:
PL : 17%
PM : 78%
PF : 05%
TOTAL : 100%
CIDCO OF MAHARASHTRA LIMITED. Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12
203
iii) Base Materials and Base Rates Applicable for the price variation
clause shall be as under:
Base Rate of Cement : Rs. 6,325.00 per M.T.
Base Rate of Bitumen 60/70 : Rs. 44,281.00
Base Rate of Mild Steel : Rs. 52,100.00 per M.T.
Base Rate of HYSD Steel : Rs. 52,100.00 per M.T.
Base Rate of TMT Steel : Rs. 52,100.00 per M.T.
Base Rate of POL : Rs. 48.01 / Lit.
Signature of Tenderer Chief Engineer & General Manager (Tech.)
Date : Date :
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SCHEDULE ‘B’
(Material to be issued to contractor by CIDCO)
Sr. No.
Particular of Materials
Rate of which material will be issued in
Rs. Ps.
Place of issue
Rate of Recovery in case of misuse or
excess consumption
============== NIL ==============
No material will be supplied by CIDCO
1. This Schedule consists Nil item only.
Signature of Tenderer Chief Engineer & General Manager (Tech.)
Date : Date :
CIDCO OF MAHARASHTRA LIMITED. Sl.Pg.No. C.A.NO. 06/CIDCO/EE(DRON-I)/2011-12
required for setting out, establishing Bench Marks and giving profiles.
The contractor shall responsible for maintaining the B.Ms., profiles
alignment and other stacks and marks as long as they are required for
the work in the opinion of the Engineer. If the contractor defaults in this
respect even after direction by the Engineer within the specified time,
they may be restored by the Engineer at the cost of the contractor.
Levels and sections of the ground shall be taken and recorded in the
presence of the contractor or his authorized representative before the
excavation is started to serve as the basis of measurement. The
contractor or his representative shall sign the book in token of his
acceptance of the level etc. If there is any disagreement, the contractor
shall inform of it in writing to the officer concerned with specific
reference to the sections before starting further work. Once further work
is started, no cognizance of any complaint shall be taken. Merely not
signing of the book shall not be deemed as disagreement.
3.4 CLASSIFICATION OF EXCAVATION:
All the materials encountered in the excavation would be mainly classified in the following groups:
1) Soils of all sorts, sand, gravel, soft murum and other similar soft or loose materials.
2) Hard murum.
3) Hard murum and boulders.
4) Soft rock.
5) Hard rock (blasted).
6) Hard rock (chiseled, wedged or line drilled)
7) Laterite
8) Slush / Marine Clay
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1) Soil of sorts, sand, gravel, soft murum and other similar soft or
loose materials. :
Soils of all sorts, sand, gravel soft, murum, chopan yellow soil. etc.,
shall included all material of earthy nature which can be easily
ploughed or small shingle and gravel which can be easily remove.
Removal of small boulder not exceeding 0.03 cu.m. or 30 litres (about
one c.ft.) accruing in the strata will be included in the rate for this item.
2) Hard murum :
This shall include all kinds of disintegrated rock or shale or indurated
clay free from boulders larger than 003cu.m. or 30 litres (about one
cu.ft.) and can be removed with pick and shovel though not without
some difficulty.
3) Hard Murum & Boulders :
This shall include all kinds of disintegrated rock or shale or indurated
clay interspersed with boulders less than half cubic metre (about half a
cu.yd) and larger than 0.03 cu.m. or 30 litres (approx one c.ft.) which
do not normally need blasting and can be removed with pick, bar,
wedges, and hammer. Boulders bigger than ½ cu.m. will be paid for as
soft or hard rock according as it is soft or hard rock.
4) Soft Rock:
This shall include all materials which is rock or hard conglomerate, all
decomposed and weathered rock, highly fissure rock, old masonry and
also soft rock, boulders bigger than ½ cubic meter with pick, crow bars,
wedges and hammer with some difficulty.
5) Hard rock (chiseled wedged or line drilled):
This shall include all rock occurring in masses which can best be
removed by blasting but which owing to the proximity of structures,
possibility of shattering the rock below or for any other reason should
be cut by a means of cold chisels or wedges or line drilling.
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The classification of the excavation would be decided by the Engineer
and his decisions shall be final and binding on the contractor. Merely
the use of explosives in excavation will not be considered as a reason
for higher classification unless blasting is clearly necessary in the
opinion of the Engineer.
6) Laterite :
This shall include laterite rock soft and hard which can be removed with
Dhokans or blasting. Lateritic murum which has not hardened into
stone shall be classified as hard murum.
7) Slush / Marine Clay :
This items includes clearing the land width of all shrubs, weeds, bushes
etc. the work will also have to be done in the area subject to the tidal
water. The work is to be executed as directed by the Engineer. The slush
(Marine clay) is to be removed on top of hard strata such as murum,
weathered rock, soft rock, hard rock etc., whichever is met earlier,
which is suitable to lay embankment foundation on such suitable strata.
The excavated stuff to be deposited as per direction of Engineer as per
site situation. For excavation in slush Contractor shall use machinery
like mechanical excavators or any other suitable type of mechanical
equipment and other machinery for transporting excavated lush for
speedy execution. For removing slush wherever necessary, if earthen or
rubble bunds are required, the same shall be provided by the
Contractor at his cost as per directions of Engineer.
The classification of the excavation would be decided by the Engineer
and his decisions shall be final and binding on the contractor. Merely
the use of explosives in excavation will not be considered as a reason
for higher classification unless blasting is clearly necessary in the
opinion of the Engineer.
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3.5 CONSTRUCTION METHOD:
Profiles of the section including the road side gutters to be excavated
shall be laid at suitable intervals of 10 m.(about32.8’) to 50m. (about
64) or other intervals directed by the Engineer to conform to the curved
or straight alignment, section grades and side slopes. The lines of cuts
shall be clearly marked and profiles of embankments where excavated
materials are to be used shall be set up with the toe line marked on
each side. The roadway section shall be first excavated with vertical
sides for each lift and the side slopes for that lift shall be excavated in
steps.
These steps shall be smoothened to the required slopes, when the
excavation reaches the road formation. The contractor shall on no
account excavate beyond the slopes or below the specified grade
unless so directed by the Engineer in writing. If excavation is done
below the specified level or outside the section., it shall not be paid for
and the Contractor shall be required to fill up at his own cost such extra
excavation in the road portion with approved materials of the
embankment grade in layer of 15cm. to 20cm. (about 6” to 8”)
watered and fully compacted to attain maximum density laid down for
the embankment in the same agreement elsewhere. The Engineer
may require measurement ridges and deadmen to be left at specified
interval or places and kept intact till ordered to be removed for the
purpose of check measurements. The excavation shall be finished
neatly, smoothly and evenly to the correct lines, curves, grades sections
and side lopes a shown on the plans or directed by the Engineer. The
sub-grade if loose shall be scarified , watered and compacted to the
same density as the embankment. The section, side slopes and
catchwater gutters shall be maintained by the contractor at his own cost
in such a way the formation and gutters will be well drained by
providing necessary diversions. etc. and not damaged due to
obstruction of any drainage. Necessary passages shall be provided for
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leading away seepage, springs, surface flow or rain water safely
without damaging the work. If any damage occurs due to default of the
contractor in this respect, he shall make good the damage at his own
cost. If it is necessary in the execution of the work to interrupt existing
surface drainage, irrigation channels sewers or under drainage,
temporary arrangements shall be provided till such time as is
necessary. The contractor at his own cost shall make good the
interrupted drainage and sewer, etc. unless separately provided in the
tender. Any damage to the existing works or work in hand caused as a
result of his operations or negligence shall be made good by the
contractor at his own cost.
Roadside gutters shall be excavated to the specified sections and shall
be measured along with the main cutting in cubic meters.
Intercepting or catchwater gutters necessary shall be built to the cross-
section, shown on the plans in time to prevent damage to the cuts or
banks.
3.6 DEWATERING:
If water is met with in the excavation due to springs, seepage rain or
other causes it shall be removed by suitable diversions, pumping or
bailing out and the excavation kept dry whenever so required by the
Engineer. Care shall be taken to discharge the water so as not to cause
damage to the work, crops or any property or any inconvenience to the
property holders in the neighborhood. Unless separate provisions is
made in the tender fro dewatering the cost of dewatering shall be
covered by the rate for excavation.
3.7 SLIDES:
If slides occur in the cutting they shall be removed as ordered by the
Engineer. If finished slopes slide into the roadway before the final
acceptance of the work, such slides shall be removed by the contractor
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and shall be paid for at the contract rate for the class of excavation
involved provided the slides are not due to any negligence of the
contactor. The classification of the materials in slides shall conform to
its condition at the time of removal and payment made accordingly
regardless or its prior condition.
Care shall be taken to see that excavation is arranged in a safe way so
that these will be no risk to the work or workmen by slides, falling
materials, boulders and collapsing sides etc.
3.8 PROTECTION:
If there is traffic nearby or if there are towns and villages in the
neighborhood, barricades and/or traffic signals shall be provided day
and night for the duration of the work in such a way as to prevent
accidents. Warning signals shall be displayed at 70m. from the danger
point on both sides to give sufficient warning. If necessary, signalers
shall be stationed at each end to regulate traffic where it is heavy.
Measures shall be taken to see that the excavation does not affect or
damage adjoining structures or property. If there is damage to
property, injury to workers, the members of the public animals etc. due
to the negligence of the contractor, he will be responsible and liable to
all the consequences including compensation.
3.9 DIVERSIONS:
If diversions are necessary for the traffic they shall be provided and
maintained as specified under specification of MORT&H clause 112.
3.10 DISPOSAL OF EXCAVATED MATERIALS:
All the excavated materials shall be the property of the CIDCO where
the excavated material is directed to be used in the construction of the
works for the general grading, plinth filling or embankments, the
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operations shall be arranged in such a manner that the capacity for
cutting, haulage and compaction are nearly the same.
All hard materials such as hard murum, rubble etc. not intended for
filling in foundations, plinth or embankments, shall be stacked neatly
for future use as directed by the ENGINEER within the lead specified.
Unsuitable or surplus materials not intended for use in part of the works
or for reuse shall be disposed of as directed by the ENGINEER.
3.11 MAINTENANCE:
The excavated roadway shall be maintained satisfactorily and protected
by the contractor at his own cost against all damage till it is taken over
by the Department. If any damage occurs, the contractor shall be
responsible to repair it at his own cost.
3.12 ITEM TO INCLUDE:
1) Clearing Site
2) Setting out by total station including necessary labour, material
and fixing reference marks.
3) Diversion unless separately provided in the tender.
4) Dewatering unless separately provided in the tender
5) Protective measures for work, work people, public, animal,
property etc.
6) Excavation to the required lines, curves, section and grades.
7) Conveying the excavated materials including all lifts and lead
upto 50 m. (about 164’), spreading in layers or stacking as
directed and disposing off unwanted materials.
8) All labour, materials and use of equipment and tolls required for
completing the item satisfactorily.
9) Compensation on account of damages, accidents or use of
private lands royalty, etc.
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3.13 MODE OF MEASUREMENT & PAYMENT:
The contract rate shall be for a unit of one cubic metre for the strata
mentioned in the wording of the items of excavation acceptably
completed, limited to the dimensions shown on the plans or as directed
by the Engineer. Excavation shall be measured in its original position by
the taking cross-sections before the work start and after it is entirely
completed. The quantity shall be worked out by the Average End Area
method. The individual dimensions and areas of the cutting shall be
measured correct upto two places of decimals of a metre and square
metre respectively and the quantity worked out correct up to two places
of decimals of a cubic metre.
When the classification of the strata changes, the contractor shall bring
this to the notice of the Engineer who will then verify and if necessary
take levels for the changed strata for purpose of measurement.
The engineer at his option may direct dead-men to be left at such
intervals as he may indicate for purpose of measuring the depths and
other dimensions either for initial measurements or for checking.
Deduction shall be made for these dead-men. These shall be removed
when no longer required and the deduction restored thereafter. If the
dead-men are not removed and used in the work or otherwise disposed
of as directed by the Engineer within 15 days of the date of check
measurement, the Engineer shall have the right to remove then at the
contractor’s cost. If for any reason the dead-men are damaged at the
time of measurement the measuring or check measuring officer shall
estimate the quantity of earthwork at his discretion and such estimate
shall be final.
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4.0 EMBANKMENT CONSTRUCTION : (Sub-grade with 95% P.D.)
Providing earthwork in embankment with approved materials
obtained from the road cutting with all leads including all lifts, laying
in layers of 20 to 30 cms in thickness, breaking clods, dressing to the
required lines, curves, grades, and section with watering and
compacting to 95% of Modified Proctor density with vibratory power
rollers etc. Complete.
4.1 GENERAL :
The work shall include preliminaries of clearing site, setting out and
preparing the ground and thereafter forming embankment for the
road with approved materials obtained from Department land or other
sources, laying them in layers, watering and compacting to the
required density lines, curves, grades, cross section and dimensions
shown on the plan or as directed by the Engineer with due allowance
for shrinkage.
4.2 CLEARING SITE :
The ground over which embankment is to be formed shall be cleared
of all trees, brushwood, loose stones, vegetation, bushes, stumps and
all other objectionable materials, under this item. Roots of trees shall
be grubbed to a depth of at least 15 cm. below the original ground
surface and at least 30 cm. below the formation level whichever is
deeper. The holes dug up for grubbing roots etc. shall be filled with
excavated materials in layers of 15 cm. and compacted. Brushwood,
stumps, vegetation etc. shall be cut flush with the ground materials
obtained from clearing site shall be dealt with according to
specification No. Rd.2.2
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4.3 SETTING OUT :
After the site is cleared, setting out shall be done as laid down in
Specification No. Rd.2.3. Profiles shall be set up with stout poles to
mark the centre and edges of the formation with the top levels of
formation clearly marked by paint or cut and the slopes with string and
pegs at every 80 metres on straight portion and 10 m. or less on
curves or as directed by the Engineer. Toe line may be marked with
pick marks. Longitudinal and cross section levels shall be taken
recorded and checked for measurements and signed by the contractor
or his representative.
All the materials and labour required for this item shall be supplied
and profiles, B.Ms. etc. put up by the contractor. These shall be
covered by the rate.
Profiles, pegs, bench marks and other marks shall be maintained
without any disturbance as long as they are required.
4.4 MATERIALS :
After utilising, for the embankment all the useful and acceptable
materials obtained from the road cutting within the specified leads the
contractor shall obtained additional materials from borrow in
Departmental Land or from other suitable sources. Satisfactory soil
murum or a mixture of soil, sand, murum, gravel, small boulders or
rubble shall normally be acceptable. Soils having dry density less than
1.6 gm./cc. shall not be used in embankments for 95% M.P.D. Soil
having laboratory dry density less than 1.75 gm./cc. shall not be used
in embankments for 98% M.P.D. Only the materials considered
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suitable as above by the Engineer shall be used for the bank. Rejected
materials shall not be put into the bank nor brought to the work site.
Perishable materials such as stumps, pieces of wood, roots, rubbish,
etc. and such other materials as will effect the stability of the
embankment shall not be used. Soils with humus of grass will be
permitted to be used as surface covering for the bank slopes to a
thickness of not more than 30 cm.
The materials required for embankment shall be obtained in any of
the following ways provided the materials is suitable in the opinion of
the Engineer:-
a) From cuttings from nearby sections of the road as directed.
b) From excavation for improving sight distances in nearby curves
as directed.
c) By sectioning any adjacent Nallah or waterways as directed.
d) By excavating cuts to lead water way from the road.
e) By excavating side drains and catch-water drains.
f) From waste land outside the road land.
g) From humps above the general ground level within the road
land.
h) From land acquired temporarily if any, outside the road land
i) From borrow pits in Departmental land when permitted and
from non Departmental and private lands when necessary.
The contractor shall follow the priorities fixed by the Engineer for
obtaining the materials from different sources.
All lifts and leads involved in conveying the materials to site shall be
included in the rate except when the materials from road cutting or
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other excavation being paid separately are to be conveyed for use in
banks with different leads.
If the materials are to be obtained from non-Departmental and private
lands, the contractor shall make his own arrangements and be
responsible for payment for rents, compensation, royalty etc. and shall
not be entitled for extra claims.
The Department shall remain indemnified regarding any claims that
may be made by private owners in this respect.
If all the useful materials available from the road cutting are not used
and materials obtained from other sources are used instead by the
contractor for his own convenience, such materials shall be deemed to
have been obtained from the road cutting to the extent to which useful
materials were available for bank and shall not be paid for under this
item.
4.5 EQUIPMENT S :
Pickaxes, crowbars, phawras and pans may be used for manual work.
Scrapers, dozers, graders, shovels, dumpers, trucks, trolleys etc. may
be used for mechanised work. Three wheel 8 tonne power roller or
sheepsfoot roller giving a pressure required to obtain the specified
density may be used for compaction. Bullock carts with tanks or
mechanically driven tankers may be used for watering.
4.6 CONSTRUCTION METHOD :
4.6.1 Diversion :
If diversions barricading and signals are found to be necessary, they
shall be provided as directed by Engineer-in-charge.
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4.6.2 Preparing the ground for laying bank :
Before any material is laid for the bank the ground shall be cleared of
all rubbish etc. and the holes if any, filled up. When the embankment
is to be laid on hill sides or slopes, the existing slopes shall be
ploughed deeply. If the cross slopes are steeper than 1 in 3, steps with
reverse slope shall be cut into the slopes to give proper hold and
seating to the bank as directed by the Engineer. On surfaces flatter
than 1 in 15 no special surface treatment such as cutting steps shall be
necessary. The top 15 cm. of soil shall be scarified and watered if
directed and compacted to the same density as specified for the
embankment before any material is laid for the bank-work.
When the embankment is to be placed over an existing road or other
hard surface which is within 15 cm. of the finished formation, the road
or other hard surface shall be scarified to a minimum depth of 15 cm.
The rate for embankment includes all the operations for preparing the
bed for laying the bank.
4.6.3 Laying the bank :
Embankment material shall be placed in successive horizontal layers of
20 cm. to 30 cm. depth, extending to the full width of the
embankment including the slopes at the level of the particular layer
and 30 cm. more on both sides to allow compaction of the full
specified section. The extra loose stuff at the edges shall be trimmed
later after completion of the bank work without extra cost leaving the
correct section fully compacted.
Keeping the width of the bank initially less and widening it later by
dumping loose earth on the slopes shall not be permitted as the
additional width and slopes will remain loose and uncompacted.
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Similar procedure to extend the embankment by dumping the material
longitudinally shall also not be allowed. When placing the bankwork
in 20 cm. to 30 cm. layers is not feasible as in water or over slopes too
steep to operate the construction equipment, the embankment may be
constructed in one layer to the minimum level at which equipment can
be operated and above such a level, the embankment shall be made
up in layers of specified thickness. When boulders, broken stones and
similar hard materials are mixed up with the embankment materials
care shall be taken to see that they are distributed uniformly into the
bank and that no hollows are left near them. No stone or hard
material shall project above the top of any layer. Each layer of
embankment shall be watered, levelled and compacted as specified
hereinafter, before the succeeding layer is placed. The surface of the
embankment shall, at all times during construction, be maintained at
such a cross fall as will shed water and prevent ponding. If bridges
and culverts on the road are not completed in advance of bankwork, a
length of 15 m. to 30 m. bank shall be left on each side of the
structure and these lengths shall be dealt with later for placing the
bank work.
4.6.4 Watering :
If the bank material contains less than the optimum moisture water
shall be added to the material in the borrow pits or alternatively in the
loose layers of the embankment to bring the moisture uniformly upto
requirement. If some moisture is likely to be evaporated in transit or in
the bank before compaction adequate water in excess shall be added
to allow for the loss. If the material contains more than the required
moisture, it shall be allowed to dry until the moisture is reduced to the
required extent. If due to wet weather etc., the moisture content of the
soil cannot be reduce to the appropriate amount by exposure, bank
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work shall be suspended till suitable conditions prevail without
contractor's claiming any compensation.
Water to be used shall be free of from harmful elements which may
cause heavy efflorescence etc., and approved by the Engineer. The
contractor shall make his own arrangement for getting adequate
quantity of acceptable water.
4.6.5 Compaction :
When a loose layer is levelled manually of mechanically and
moistured or dried to a uniform moisture content suitable for
maximum compaction, it shall be compacted by power roller, sheeps
foot rollers or vibratory roller or heavy hauling or dozing equipment to
give the specified 95%/98% of the Modified Proctor density for
respective item specified under Schedule “A”. If on testing, the density
is found to be less then 95%/98% of the Modified Proctor density the
contractor shall do additional compaction necessary to get the
specified density after adding water if required. It the density can not
be improved on reasonable efforts, the work may be accepted as
substandard by the Engineer, if he thinks it not harmful for the
purpose, at a reduce rate. Where the specified density is imperative the
work shall be removed and redone by the contractor at his own cost to
give the specified density.
Where the material allowed to be used is excessively stony or sandy so
that it will not compact to the required density where such material is
otherwise acceptable for embankment construction the Engineer may
waive the tests for stony or sandy portions where the required test
results are contained. Each layer shall be compacted fully before the
next layer is laid.
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Proper sequence of all component operation shall be maintained to
give individual progress. To all for subsequent settlement, the finished level or of the
embankment may be kept higher than the specified level by 1 cm. for
each metre of the height of the bank and this, if provided, will be paid
for.
The hauling equipment, animals, labour etc., shall be made to go over
the bank as far as possible, to get the initial compaction. Care shall be
taken for getting good compaction behind abutments returns and
wings walls, etc.
Bank-work in areas not accessible to rollers such as those adjoining
bridges, culverts and other work, shall be carried out independently of
the main embankment and shall be have the layers placed in 10 cm.
to 15 cm. (about 4" to 6") height and each layer shall be moistened
and thoroughly compacted with mechanical or manual tampers.
Embankment shall be brought up simultaneously in equal layers on
each side and compacted carefully to avoid unequal pressure etc.
4.7 PROTECTION :
Proper care shall be taken to ensure that the method of operation and
compaction of the bank-word does not cause damage or undue strain
to any structural element. Embankment over and around bridges or
culverts shall be of approved materials and carefully placed and
compacted. The contractor shall take all precautions necessary for the
protection of the bank-work by diversion of streams, local surface
drainage, rain water etc. likely to damage the bank. Any damage to
the bank-work due to no protection or inadequate protection shall be
made good by the contractor at his own cost. Conveyance of
materials shall not cause obstruction or nuisance to the nearby
property owners and traffic.
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4.8 FINISHING :
The embankment shall be finished and dressed smooth and even in
conformity with the alignment, levels, cross- sections and dimensions
shown on the drawings with due allowance for shrinkage. On curves,
section shall be provided with super elevation and increased widths as
shown on the plans or directed by the Engineer. All damages caused
by rain, flood or any other reason shall be made good in the finishing
operations. The road land which shall be cleared of all debris and ugly
spots near camping areas etc. for which the contractor or his men
were responsible.
4.9 MAINTENANCE :
The contractor shall be responsible for maintaining the bank-work
satisfactorily at his own cost till finally accepted including making good
any damages.
4.10 TESTS :
1) Tests shall be made to determine the maximum density of the
material to be used by the Proctor method before starting the
work.
2) Density tests shall be carried out for the bankwork during the
progress of the work. One set of three core samples for every
3,000 sq.m. area of each layer of bankwork shall be taken and
tested. The average density shall not be less than 95%/98% of
the Modified Proctor density for respective item specified under
Schedule “A”.
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4.11 ITEM TO INCLUDE :
1) Clearing site.
2) Setting out alignment including necessary labour and materials
and maintaining it as long as required.
3) Preparing the ground for laying the embankment.
4) Providing and maintaining diversions if necessary.
5) Obtaining the embankment materials including all lifts and leads
and laying the bank in layers, watering, compaction and tests
and Royalties, fees etc. if any.
6) Protecting and maintaining the bank.
7) Finishing the embankment.
8) All labour, materials, use of equipment, tools and plants
necessary for completing the work satisfactorily.
4.12 MODE OF MEASUREMENT AND PAYMENT :
The contract rate shall be per cu. metre of the finished bankwork.
Measurements shall normally be taken by levelling sections and
chaining distances between them.
The measurements of the sections shall be limited to the dimensions
shown on the drawings or those ordered by the Engineer in writing.
The dimensions shall be recorded correct upto two places of decimals
of a metre. The sectional areas shall be worked out correct upto two
places of decimals of a sq.metre. The quantity shall be worked out
correct upto two places of decimals of a cu.m. by the average end
area method.
If outside materials have been used in the portions of the bankwork
where materials from cutting were to be used the outside material shall
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be deemed to have been obtained from the cutting as specified in
those item and paid for under those items only.
No deduction shall be made from the gross volume for R.A. Bills as
well as Final Bill.
5.0 Providing earthwork in embankment with approved materials obtained from contractor’s own source including all lifts and leads, laying in layers of 20 cm. to 30 cm. thickness, breaking clods, dressing to the required lines, curves, grades and section, watering and compacting to 97% Modified Proctor Density Complete.
5.1 GENERAL :
The work shall include preliminaries of clearing site, setting out and
preparing the ground and thereafter forming embankment for the
road with approved materials obtained from contractor’s own source,
laying in layers, watering and compacting to the required density and
lines, curves, grades, cross section and dimensions shown on the plan
or as directed by the Engineer with due allowance for shrinkage.
5.2 CLEARING SITE :
The ground over which embankment is to be formed shall be cleared
of all trees (unless cutting of trees of over 30 cm. girth is provided as a
separate item vide Rd.1), brushwood, loose stones, vegetation, bushes,
stumps and all other objectionable materials, under this item. Roots
of trees shall be grubbed to a depth of at least 15 cm. below the
original ground surface and at least 30 cm. below the formation level
whichever is deeper. The holes dug up for grubbing roots etc. shall be
filled with excavated materials in layers of 15 cm. and compacted.
Brushwood, stumps, vegetation etc. shall be cut flush with the ground
materials obtained from clearing site shall be dealt with according to
Clause No.5.2 of Particular Specifications.
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5.3 SETTING OUT :
After the site is cleared, setting out shall be done as laid down in
Clause No. 5.3 of Particular Specification. Profiles shall be set up with
stout poles to mark the centre and edges of the formation with the top
levels of formation clearly marked by paint or cut and the slopes with
string and pegs at every 80 metres on straight portion and 10 m. or
less on curves or as directed by the Engineer. Toe line may be marked
with pick marks. Longitudinal and cross section levels shall be taken
recorded and checked for measurements and signed by the contractor
or his representative.
All the materials and labour required for this item shall be supplied
and profiles, B.Ms. etc. put up by the contractor. These shall be
covered by the rate.
Profiles, pegs, bench marks and other marks shall be maintained
without any disturbance as long as they are required.
5.4 MATERIALS :
After utilising, for the embankment all the useful and acceptable
materials obtained from the contractor’s own source within the
specified leads the contractor shall obtained additional materials from
Contractor’s own source. Satisfactory soil murum or a mixture of soil,
sand, murum, gravel, small boulders or rubble shall normally be
acceptable. Soils having laboratory dry density shall be specified in the
item description of Schedule “A” (Bill of quantities). Only the materials
considered suitable by the Engineer shall be used for the bank.
Rejected materials shall not be put into the bank nor brought to the
work site. Perishable materials such as stumps, pieces of wood, roots,
rubbish, etc. and such other materials as will effect the stability of the
embankment shall not be used. Soils with humus of grass will be
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permitted to be used as surface covering for the bank slopes to a
thickness of not more than 30 cm. (about 12").
5.5 EQUIPMENT :
Pickaxes, crowbars, phawras and pans may be used for manual work.
Scrapers, dozers, graders, shovels, dumpers, trucks, trolleys etc. may
be used for mechanised work. 8-10 tonne vibratory roller giving a
pressure required to obtain the specified density may be used for
compaction. Mechanically driven tankers may be used for watering.
5.6 CONSTRUCTION METHOD :
5.6.1 Diversion :
If diversions barricading and signals are found to be necessary, they
shall be provided as detailed in specification No. BR. 1 of Standard
Specifications of Red Book.
5.6.2 Preparing the ground for laying bank :
Before any material is laid for the bank the ground shall be cleared of
all rubbish etc. and the holes if any, filled up. When the embankment
is to be laid on hill sides or slopes, the existing slopes shall be
ploughed deeply. If the cross slopes are steeper than 1 in 3, steps with
reverse slope shall be cut into the slopes to give proper hold and
seating to the bank as directed by the Engineer. On surfaces flatter
than 1 in 15 no special surface treatment such as cutting steps shall be
necessary. The top 15 cm. (about 6") of soil shall be scarified and
watered if directed and compacted to the same density as specified for
the embankment before any material is laid for the bank-work.
When the embankment is to be placed over an existing road or other
hard surface which is within 15 cm. (about 6") of the finished
formation, the road or other hard surface shall be scarified to a
minimum depth of 15 cm. (about 6").
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The rate for embankment includes all the operations for preparing the
bed for laying the bank.
5.6.3 Laying the bank :
Embankment material shall be placed in successive horizontal layers
of 20 cm. to 30 cm. (about 8" to 12") depth, extending to the full
width of the embankment including the slopes at the level of the
particular layer and 30 cm. (about 12") more on both sides to allow
compaction of the full specified section. The extra loose stuff at the
edges shall be trimmed later after completion of the bank work without
extra cost leaving the correct section fully compacted.
Keeping the width of the bank initially less and widening it later by
dumping loose earth on the slopes shall not be permitted as the
additional width and slopes will remain loose and uncompacted.
Similar procedure to extend the embankment by dumping the material
longitudinally shall also not be allowed. When placing the bankwork
in 20 cm. to 30 cm. layers is not feasible as in water or over slopes too
steep to operate the construction equipment, the embankment may be
constructed in one layer to the minimum level at which equipment can
be operated and above such a level, the embankment shall be made
up in layers of specified thickness. When boulders, broken stones and
similar hard materials are mixed up with the embankment materials
care shall be taken to see that they are distributed uniformly into the
bank and that no hollows are left near them. No stone or hard
material shall project above the top of any layer. Each layer of
embankment shall be watered, levelled and compacted as specified
hereinafter, before the succeeding layer is placed. The surface of the
embankment shall, at all times during construction, be maintained at
such a cross fall as will shed water and prevent ponding. If bridges
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and culverts on the road are not completed in advance of bankwork, a
length of 15 m. to 30 m. (about 50' to 100') bank shall be left on each
side of the structure and these lengths shall be dealt with later for
placing the bank work.
5.6.4 Watering:
If the bank material contains less than the optimum moisture water
shall be added to the material in the borrow pits or alternatively in the
loose layers of the embankment to bring the moisture uniformly upto
requirement. If some moisture is likely to be evaporated in transit or in
the bank before compaction adequate water in excess shall be added
to allow for the loss. If the material contains more than the required
moisture, it shall be allowed to dry until the moisture is reduced to the
required extent. If due to wet weather etc., the moisture content of the
soil cannot be reduce to the appropriate amount by exposure, bank
work shall be suspended till suitable conditions prevail without
contractor's claiming any compensation.
Water to be used shall be free of from harmful elements which may
cause heavy efflorescence etc., and approved by the Engineer. The
contractor shall make his own arrangement for getting adequate
quantity of acceptable water.
5.6.5 Compaction:
When a loose layer is levelled manually of mechanically and
moistured or dried to a uniform moisture content suitable for
maximum compaction, it shall be compacted by power roller, sheeps
foot rollers or vibratory roller or heavy haling or dozing equipment to
give the specified 97% of the Modified Proctor Density. If on testing,
the density is found to be less than 97% of the Modified Proctor Density
the contractor shall do additional compaction necessary to get the
specified density after adding water if required. The density can not be
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improved on reasonable efforts, the work may be accepted as
substandard by the Engineer. If he thinks it not harmful for the
purpose, at a reduce rate. Where the specified density is imperative
the work shall be removed and redone by the contractor at his own
cost to give the specified density.
Where the material allowed to be used is excessively stony or sandy so
that it will not compact to the required density where such material is
otherwise acceptable for embankment construction the Engineer may
waive the tests for stony or sandy portions where the required test
results are contained. Each layer shall be compacted fully before the
next layer is laid.
Proper sequence of all component operation shall be maintained to
give individual progress.
To all for subsequent settlement, the finished level or of the
embankment may be kept higher than the specified level by 1 cm. for
each metre of the height of the bank and this, if provided, will be paid
for.
The hauling equipment, animals, labour etc., shall be made to go over
the bank as far as possible, to get the initial compaction. Care shall be
taken for getting good compaction behind abutments returns and
wings walls, etc.
Bank-work in areas not accessible to rollers such as those adjoining
bridges, culverts and other work, shall be carried out independently of
the main embankment and shall be have the layers placed in 10 cm.
to 15 cm. (about 4" to 6") height and each layer shall be moistened
and thoroughly compacted with mechanical or manual tampers.
Embankment shall be brought up simultaneously in equal layers on
each side and compacted carefully to avoid unequal pressure etc.
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5.7 PROTECTION:
Proper care shall be taken to ensure that the method of operation and
compaction of the bank-word does not cause damage or undue strain
to any structural element. Embankment over and around bridges or
culverts shall be of approved materials and carefully placed and
compacted. The contractor shall take all precautions necessary for the
protection of the bank-work by diversion of streams, local surface
drainage, rain water etc. likely to damage the bank. Any damage to
the bank-work due to no protection or inadequate protection shall be
made good by the contractor at his own cost. Conveyance of materials
shall not cause obstruction or nuisance to the nearby property owners
and traffic.
5.8 FINISHING:
The embankment shall be finished and dressed smooth and even in
conformity with the alignment, levels, cross-sections and dimensions
shown on the drawings with due allowance for shrinkage. On curves,
section shall be provided with super elevation and increased widths as
shown on the plans or directed by the Engineer. All damages caused
by rain, flood or any other reason shall be made good in the finishing
operations. The road land which shall be cleared of all debris and ugly
spots near camping areas etc. for which the contractor or his men
were responsible.
5.9 MAINTENANCE:
The contractor shall be responsible for maintaining the bank-work
satisfactorily at his own cost till finally accepted including making good
any damages.
5.10 TESTS:
1) Tests shall be made to determine the maximum density of the
material to be used by the Proctor method before starting the
work.
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2) Density tests shall be carried out for the bankwork during the
progress of the work. One set of three core samples for every
3,000 sq.m. area of each layer of bank work shall be taken and
tested. The average density shall not be less than 97% of the
Proctor density. A deviation of 80 kg./cu.m. for fine and 160
Kg./cu.m. for coarse grained soils shall be permitted in dry
density in individual sample if the average density reaches upto
97% Modified Proctor density for each set.
5.11 ITEM TO INCLUDE :
1) Clearing site.
2) Setting out alignment including necessary labour and materials
and maintaining it as long as required.
3) Preparing the ground for laying the embankment.
4) Providing and maintaining diversions if necessary unless provided
as a separate item in the tender.
5) Obtaining the embankment materials including all lifts and leads
and laying the bank in layers, watering, compaction and tests
and Royalties, fees, Quarry Permit etc. if any.
6) Protecting and maintaining the bank.
7) Finishing the embankment.
8) All labour, materials, use of equipment, tools and plants
necessary for completing the work satisfactorily.
5.12 MODE OF MEASUREMENT AND PAYMENT :
The contract rate shall be per cu. metre of the finished bank work.
Measurements shall normally be taken by levelling sections and
chaining distances between them.
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The measurements of the sections shall be limited to the dimensions
shown on the drawings or those ordered by the Engineer in writing.
The dimensions shall be recorded correct upto two places of decimals
of a metre. The sectional areas shall be worked out correct upto two
places of decimals of a sq.metre. The quantity shall be worked out
correct upto two places of decimals of a cu.m. by the average end
area method.
The volume of bank thus calculated shall be reduced by 5 percent for
the purpose of payment when the measurements are taken for
running bills and by 1 percent in final measurements.
If outside materials have been used in the portions of the bankwork
where materials from cutting were to be used the outside material
shall be deemed to have been obtained from the cutting as specified
in those item and paid for under those items only.
The final quantity to be paid for under this item shall be the total
quantity of bankwork reduced by 1 percent less the quantity to be paid
for using materials from cutting.
The gross quantity of earthwork embankment payable under this item
shall be deducted from the total payable quantity of excavation.
6.0 GRANULAR SUB-BASE
6.1 SCOPE:
This work shall consist of laying and compaction well-graded material
on prepared subgrade in accordance with the requirements of these
specifications. The material shall be laid in one or more layers as sub-
base and upper sub-base (termed as sub-base hereinafter) as
necessary according to lines, grades and cross- sections shown on the
drawings or as directed by the Engineer.
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6.2 MATERIALS:
6.2.1 The material to be used for the work shall be natural sand, murum,
gravel, crashed stone or combination thereof depending upon the
grading required. Materials like crushed slag, crushed concrete, brick
metal and kankar may be allowed only with the specific approval of the
Engineer. The material shall be free from organic or other deleterious
constituents and conform to one of the three grading given in Table-1.
While the in Table-1 are in respect of close-graded granular sub-base
materials. One each for maximum particle size of 75mm, 53mm and
26.5mm, the corresponding gradings for the coarse graded materials
for each of the three maximum particle sized are given at Table-2. The
grading to be adopted for a project shall be specified in the contract.
6.2.2 PHYSICAL REQUIREMENT:
The material shall have a 10 percent fines value of 50kN or more (for
sample in soaked condition) when tested in compliance with BS: 812
(Part-III). The water absorption value of the coarse aggregate shall be
determined as per IS: 2386 (Part-III); If this value is greater than 2
percent, the soundness test shall be carried out on the material
delivered to site as per IS: 383. For grading II & III materials, the CBR
shall be determined at the density and moisture content likely to be
developed in equilibrium conditions which shall be taken as being the
density relating to a uniform air voids content of 5 percent.
TABLE – 1
GRADING FOR CLOSE GRADED GRANULAR SUB-BASE MATERIALS
IS SIEVE DESIGNATION
PERCENT BY WEIGHT PASSING THE IS SIEVE
GRADING-I GRADING-II GRADING-III
75.0 MM 100 --- ---
53.0 MM 80 – 100 100 ---
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TABLE – 1
GRADING FOR CLOSE GRADED GRANULAR SUB-BASE MATERIALS
IS SIEVE DESIGNATION
PERCENT BY WEIGHT PASSING THE IS SIEVE
GRADING-I GRADING-II GRADING-III
26.5 MM 55 – 90 70 – 100 100
9.50 MM 35 – 65 50 – 80 65 – 95
4.75 MM 22 – 55 40 – 65 50 – 80
2.36 MM 20 – 40 30 – 50 40 – 65
0.425 MM 10 – 25 15 – 25 20 – 35
0.075 MM 3 – 10 3 – 10 3 – 10
CBR VALUE (Minimum)
30 25 20
NOTE:
The material passing 425 micron (0.425mm) sieve for all the three
gradings when tested according to IS:2720 (Part-5) shall have liquid
limit plasticity index not more than 25 and 6 percent respectively.
6.3 STRENGTH OF SUB-BASE:
It shall be ensured prior to actual execution that the material to be used
in the sub-base satisfies the requirements of CBR and other physical
requirements when compacted and finished.
When directed by the Engineer, this shall be verified by performing CBR
tests in the laboratory as required on specimens remoulded at field dry
density and moisture content and any other tests for the “quality” of
materials as may be necessary.
6.4 CONSTRUCTION OPERATIONS:
6.4.1 Preparation of subgrade:
Immediately prior to the laying of sub-base, the subgrade already
finished as to clause 301 or 305 of MORT & H Specification as
applicable shall be prepared by removing all vegetation and other
extraneous matter, lightly sprinkled with water if necessary and rolled
with two passes of 80 – 100 kN smooth wheeled roller.
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6.4.2 Spreading and Compacting: The sub base material of grading
specified in the contract shall be spread on the prepared sub – grade
with the help of a motor grader of adequate capacity, its blade having
hydraulic controls suitable for initial adjustment and maintain the
required slope and grade during the operation or other means as
approved by the Engineer.
When the sub-base material consists of combination of materials
mentioned in Clause 401.2.1 of MORT & H Specification (Fourth
Revision), mixing shall be done mechanically by the mix-in-place
method.
Manual mixing shall be permitted only where the width of laying not
adequate for mechanical operations as in small – sized jobs. The
equipment used for mix-in-place construction shall be rotavator or
similar approved equipment capable of mixing the material to the
desired degree. If so desired by the Engineer, trial runs with the
equipment shall be carried out to establish its suitability for the work.
Moisture content of the loose material shall be checked in accordance
with IS:2720 (Part-2) and suitably adjusted by sprinkling additional
water a truck mounted or trailer mounted water tank and suitable for
applying water uniformly and at controlled quantities to variable widths
of surface or other means approved by the Engineer so that, at the time
of compaction, it is from 1 Percent above to 2 percent below the
optimum moisture content corresponding to IS:2720 (Part-8). While
adding water, due allowance shall be made for evaporation losses.
After water has been added, the material shall be processed by
mechanical or other approved means like disk harrows, rotavators until
the layer is uniformly wet.
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Immediately, thereafter, rolling shall start. If the thickness or compacted
layer does not exceed 100mm, a smooth wheeled roller of 80 to 100
kN weight may be used. For a compacted single layer upto 225 mm
the compaction shall be done with the help of a vibratory roller of
minimum 80 to 100kN static weight with plain drum or pad foot drum
or heavy pneumatic tyred roller of minimum 200 to 300 kN weight
having a minimum tyre pressure of 0.7 MN/m2 or equivalent capacity
roller capable of achieving the required compaction. Rolling shall
commence at the lower edge and proceed towards the upper edge
longitudinally for portions having unidirectional cross fall and super-
elevation and shall commence at the edges and progress towards the
center for positions having cross fall on both sides.
Each pass or the roller shall uniformly overlap not less than one-third of
the track made in the preceding pass. During rolling, the grade and
crossfall (camber) shall be checked and any high spots or depressions,
which become apparent, corrected by removing or adding fresh
material. The speed of the roller shall not exceed 5 km.per hour.
Rolling shall be continued till the achieved is at least 98 percent of the
maximum dry density for the material determined as per IS:2720
(Part-8). The surface of any layer of material on completion of
compaction shall be well closed, free from movement under
compaction equipment and from compaction planes, ridges, cracks or
loose material. All loose, segregated or otherwise defective areas shall
be made good to the full thickness of layer and re-compacted.
6.5 SURFACE FINISH AND QUALITY CONTROL OF WORK:
The surface finish of construction shall conform to the requirements of
Clause 902 of MORT &H Specifications.
Control on the quality of materials and works shall be exercised by the
Engineer in accordance with Section 900.
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6.6 ARRANGEMENTS FOR TRAFFIC:
During the period of construction, arrangement of traffic shall be
maintained in accordance with Clause 112 of MORT & H
Specifications.
6.7 MEASUREMENT FOR PAYMENT:
Granular sub-base shall be measured as finished work in position in
cubic metres.
The protection of edges of granular sub-base extended over the full
formation as shown in the drawing shall be considered incidental to the
work of providing granular sub-base and as such no extra payment
shall be made for the same.
6.8 RATE:
The contact unit rate for granular sub-base shall be payment in full for
carrying out the required operations including full compensation for:
1) Making arrangements for traffic to Clause 112 of MORT & H
Specifications except for initial treatment to verges, shoulders
and construction or diversions:
2) Furnishing all materials to be incorporated in the work including
all royalties, fees, rents where necessary and all leads and lifts:
3) All labour, tools, equipment and incidentals to complete the work
to the specifications,
4) Carrying out the work in part widths of road where directed and
5) Carrying out the required tests for quality control.
7.0 WET MIX MACADAM SUB – BASE / BASE :
7.1 SCOPE :
This work shall consist of laying and compacting clean, crushed,
graded aggregate and granular material, premixed with water, to a
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dense mass on a prepared subgrade/sub-base/base or existing
pavement as the case may be in accordance with the requirements of
the specification. The material shall be laid in one or more layers as
necessary to lines, grades and cross sections shown on the approved
drawings or as directed by the Engineer.
The thickness of a single compacted Wet Mix Macadam layer shall be
less than 75 mm. When vibrating or other approved types of
compacting equipment are used, the compacted depth of a single layer
of the sub-case course may be increase to 200 mm upon approval of
the Engineer.
7.2 MATERIALS :
7.2.1 Physical requirement :
Coarse aggregate shall be crushed stone. If crushed gravel/shingle is
used not less than 90 percent by weight of the gravel/shingle pieces
retained on 4.75 mm sieve shall have at least two fractured faces. The
aggregates shall conform to the physical requirements set forth in the
following Table – 1.
TABLE – 1
PHYSICAL REQUIREMENTS OF COARSE AGGREGATES
FOR WET MIX MACADAM FOR BASE COURSES
SL. NO.
TEST TEST METHOD REQUIREMENTS
1. *Loss Angles Abrasion Value or
IS : 2386 (Part – IV) 40% Maximum
2. * Aggregate impact value
IS : 2386 (Part –IV) or IS : 5640
30% Maximum
3. Combined flakiness and Elongation indices (total)
IS : 2386 (Part – I) 30% Maximum**
* Aggregates may satisfy requirement of either of the two tests.
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** To determine this combined proportion, the flaky stone from a
representative sample should first be separated out. Flakiness index is
weight of flaky stone metal divided by weight of stone sample. Only the
elongated particles be separated out from the remaining (non-flaky)
stone metal. Elongation index is weight of elongated particles divided
by total non-flaky particles. The value of flakiness index and elongation
index so found are added up.
7.2.2 Grading requirements :
The aggregates shall conform to the grading given below:
TABLE – 2
GRADING REQUIRMENTS OF AGGREGATES FOR WET MIX MACADAM
SIEVE DESIGNATION PERCENT PASSING
53 mm 100
45 mm 95 -100
26.5 mm ---
22.4 mm 60 – 80
11.2 mm 40 – 60
4.75 mm 25 – 40
2.36 mm 15 -30
600 microns 8 -22
75 microns 0-8
Materials finer than 425 micron shall have Plasticity Index (PI) not
exceeding 6.
The final gradation approved within these limits shall be well graded
from coarse to fine and shall not vary from the low limit on one sieve to
the high limit on the adjacent sieve or vice versa.
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7.2.3 Construction operation:
7.2.3.1 Preparation of Base:
Clause 404.3.1 of MORT & H shall apply.
7.2.3.2 Provisional of lateral confinement of aggregates:
While constructing wet mix macadam, arrangement shall be made for
the lateral confinement of wet mix. This shall be done by laying
materials in adjoining shoulders along with that the wet mix macadam
layer and following the sequence of operations described in Clause
407.4.1 of MORT & H.
7.2.3.3 Preparation of mix :
Wet – mix macadam shall be prepared in an approved mixing plant of
suitable capacity having provision for controlled addition of water and
force/positive mixing arrangement like pugmill or pan type mixer of
concrete batching plant. For small quantity of wet mix work, the
Engineer may permit the mixing to be done in concrete mixers.
Optimum moisture for mixing shall be determined in accordance with
IS:2720 (Part -8) after replacing the aggregate fraction retained on
22.4 mm sieve with material of 4.75 mm to 22.4 size. While adding
water, due allowance should be made for evaporation losses. However,
at the time of compaction, water in the wet mix should not very from the
optimum value by more than agreed limits. The mixed material should
be uniformly wet and no segregation should be permitted.
7.2.3.4 Spreading of mix :
Immediately after mixing, the aggregates shall be spread uniformly and
evenly upon the prepared subgrade/sub-base/base in required
quantities. In no case should these be dumped in heaps directly on the
area where these are to be laid nor shall their hauling over a partly
completed stretch be permitted.
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The mix may be spread either by a motor grader or a paver finisher or
motor grader. For portions where mechanical means cannot be used,
manual means as approved by the Engineer shall be used. The motor
grade shall be capable of spreading the material uniformly all over the
surface. Its blade shall have hydraulic control suitable for initial
adjustments and maintaining the same so as to achieve the specified
slope and grade.
The paver finisher shall be self propelled having the following features:
i) Moving hoppers and suitable distribution mechanism
ii) The screed shall have tamping and vibrating arrangement for
initial compaction to the layer as it is spread without rutting or
otherwise marring the surface profile.
iii) The paver shall be equipped with necessary control mechanism
so as to ensure that the finished surface is free from surface
blemishes.
The surface of the aggregate shall be carefully checked with templates
and all high or low spots remedied by removing or adding aggregate
as may be required. The layer may be tested by depth blocks during
construction. No segregation of large and fine particles should be
allowed. The aggregates as spread should be of uniform gradation
with no pockets of fine/coarse materials.
7.2.3.5 Compaction :
After mix have been laid to the required thickness, grade and cross
fall/camber, the same shall be uniformly compacted to the full depth
with suitable roller. If the thickness of single compacted layer does not
exceed 100mm, a smooth wheel roller of 80 to 100 kN weight may be
used . For a compacted roller layer upto 200mm the compaction shall
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be done with the help of vibratory roller of minimum static weight of 80
to 100kN of equivalent capacity roller. The speed of the roller shall not
exceed 5 k.m./h.
In portions having unidirectional cross fall/super elevation, rolling shall
commence from the lower edge and progress gradually towards the
upper edge. Thereafter roller should progress parallel to the centre line
of the road, uniformly overlapping each preceding track by at least one
third width until the entire surface has been rolled. Alternate strips of
the roller shall be terminated in stops at least 1 m. away from any
preceding stop.
In portions in camber, rolling should begin at the edge with the roller
running forward and backward until the edges have been firmly
compacted. The roller shall then progress gradually towards the centre
parallel to the centre line of the road uniformly overlapping each of the
preceding tract by at least one third width until the entire surface has
been rolled.
Any displacement occurring as a result of reversing of the direction of
the roller or from any other cause shall be corrected at once as
specified and or removed the made good.
Along forms, kerbs, walls or other places not accessible to the roller,
the mixture shall be thoroughly compacted with mechanical tampers or
a plate compactor. Skin patching of an area without scarifying the
surface to permit proper bonding of the added material shall not be
permitted.
Rolling should not be done when the sub – grade is soft or yielding or
when it causes a wave – like motion in the sub-base/base course or sub
– grade. If irregularities develop during rolling which exceed 12 mm
when tested with a 3 metre straight edge, the surface should be loosed
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and premixed material added or removed as required before rolling
again so as to achieve a uniform surface conforming to the desired
grade and cross fall. In no case should the use of unmixed material be
permitted to make up the depressions.
Rolling should be continued till the density achieved is at least 98% of
the maximum dry density for the material as determined by the method
outlined in IS:2720 (Part 8).
After completion, the surface of any finished layer should be well
closed, free from movement under compaction equipment or any
compaction planes, ridges, cracks and loose material. All loose,
segregated or otherwise defective areas shall be made good to the full
thickness of the layer and re-compacted.
7.2.3.6 Setting and drying :
After final compaction of wet mix macadam course, the road shall be
allowed to dry for 24 hours.
7.2.4 Opening to traffic :
Preferably no vehicular traffic of any kind should be allowed on the
finished wet-mix macadam surface till it has dried and the wearing
course laid.
7.2.5 Surface Finish and Quality Control of work :
7.2.5.1 Surface evenness :
The surface finish of construction shall conform to the requirements of
Clause 902.
7.2.5.2. Quality control :
Control of the quality of materials and shall be exercised by the
Engineer in accordance with Section 900 of M.O.R.T. & H.
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7.2.6 Rectification of Surface irregularity :
Where the traffic irregularity of the wet mix macadam course exceeds
the permissible tolerance or where the course is otherwise defective due
to sub-grade soil getting mixed with the aggregates, the full thickness of
the layer shall be scarified over the affected area, re-shaped with
added premixed material or removed and replace with fresh premixed
material as applicable and re-compacted in accordance with Clause
406.3 The area treated in aforesaid manner shall not be less than 5 m.
long and 2 m. wide. In no case shall depressions be filled up with
unmixed and ungraded material or fines.
7.2.7 Arrangement for traffic :
During the period of construction, arrangement of traffic shall be done
as per Clause 112.
7.2.8 Measurement for payment :
Wet mix macadam shall be measure as finished work in position in
cubic metres.
7.2.9 Rates :
The contract unit rate for wet mix macadam shall be payment in full for
carrying out the required operations including compensation for all
components listed Clause 401.8 of MORT&H Specifications.
8.0 PRIME COAT OVER GRANULAR BASE :
8.1 SCOPE :
This work shall consist of application of a single coat of low viscosity
liquid bituminous material to a porous granular surface preparatory to
the superimposition of bituminous treatment or mix.
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8.2 MATERIALS :
8.2.1 Primer :
The choice of a bituminous primer shall depend upon the porosity
characteristics of the surface to be primed as classified in IRC : 16.
These are :
i) Surface of low porosity; such as cement stabilized soil base.
ii) Surface of medium porosity, such as cement stabilized soil
base.
iii) Surfaces of high porosity; such as a gravel base.
8.2.2 Primer viscosity :
The type and viscosity of the primer shall comply with the requirements
of IS 8887, as sampled and tested for bituminous primer in accordance
with theses standards. Guidance on viscosity and rate of spray is given
in Table – 1.
TABLE – 1
VISCOSITY REQUIREMENT AND QUANTITY OF LIQUID
BITUMINOUS PRIMER
Types of surface
Kinematic Viscosity of
Primer at 600 C
(Centistokes)
Quantity of Liquid
Bituminous Material per
10 Sq.m. (K.G.)
Low porosity 30 – 60 6 to 9
Medium porosity 70 – 140 9 to 12
High porosity 250 – 500 12 to 15
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8.2.3 Choice of primer :
The primer shall be bitumen emulsion, complying with IS 8887 of a
type and grade as specified in the contract or as directed by the
Engineer. The use of medium curing cutback as per IS 217 shall be
restricted only for sites at sub-zero temperatures or for emergency
applications as directed by the Engineer.
8.3 WEATHER AND SEASONAL LIMITATIONS :
Bituminous primer shall not be applied to a wet surface or during dust
storm or when the weather is foggy, rainy or windy or when the
temperature in the shade is less than 100 C. Surfaces which are to
receive emulsion primer should be damp, but no free or standing water
shall be present.
8.4 CONSTRUCTION :
8.4.1 Equipment :
The primer distribute shall be a self – propelled or towed bitumen
pressure sprayer equipped for spraying the material uniformly at
specified rates and temperatures. Hand spraying of small areas,
inaccessible to the distributor, or in narrow strips shall be sprayed with
a pressure hand sprayer, or as directed by the Engineer.
8.4.2 Preparation of road surface :
The surface to be primed shall be prepared in accordance with Clause
501.8 and 902 of MORT & H (Forth Revision) as appropriate.
Immediately prior to applying the primer the surface shall be carefully
swept clean of dust and loose particles, care being taken not to disturb
the interlocked aggregate. This is best achieved when the surface layer
is slightly moist (lightly sprayed with water and the surface allowed do
dry) and the surface should be kept moist until the primer is applied.
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8.4.3 Application of bituminous primer :
The viscosity and rate of application of the primer shall be secified in
the contract, or as determined by site trials carried out as directed by
the Engineer. Where a geosynthetic is proposed for use, the
requirements of Clauses 703.3.2 & 703.4 of MORT&H specifications
shall apply. The bituminous primer shall be sprayed uniformly in
accordance with Clause 501 of MORT & H specifications. The method
of application of the primer will depend on the type of equipment to be
used, size of nozzles, pressure at the spray bar bars speed of forward
movement. The contractor shall demonstrate at a spraying trial, that the
equipment and method to be sued is capable of producing a uniform
spray, within the tolerances specified.
8.4.4 Curing of primer and opening to traffic :
A primed surface shall be allowed to cure for at least 24 hours or such
other period as is found to be necessary to allow all the volatile to
evaporate before any subsequent surface treatment of mix is laid. Any
unabsorbed prime shall first be blotted with an application of sand,
using the minimum quality possible. A primed surfaces shall not be
opened to traffic other than that necessary to lay the next course. A very
thin layer of clean san may be applied to the surface of the primer, to
prevent the primer picking up under the wheels of the paver and the
trucks delivering bituminous material to the paver.
8.4.5 Tack coat :
Over the primed surface, a tack coat should be applied in accordance
with Clause 503 of MORT & H (Fourth Revision).
8.5 QUALITY CONTROL OF WORK :
For control of the quality of materials supplied and the works carried
out, the relevant provisions of Section 900 of MORT & H (Fourth
Revision) shall apply.
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8.6 ARRANGEMENTS FOR TRAFFIC :
During construction operations arrangement for traffic shall be made in
accordance with the provisions of Clause 112 of MORT & H
Specifications.
8.7 MEASUREMENT OF PAYMENT :
Prime coat shall be measure in terms of surface area of application in
square metres.
8.8 RATE :
The contract unit rate for coat with adjustments as described in Clause
502.7 of MORT & H shall be payment in full for carrying out the
required operations including full compensation for all components
listed in Clause 401.8 (i) to (v) of MORT&H Specifications and as
applicable to the work specified in these specifications. Payment shall
be made on the basis of the provision of primer coat at an application
of rate 0.6 kg. to 0.9 kg. per square metre, with adjustment, plus or
minus, for the variation between this amount and the actual amount
approved by the Engineer after the preliminary trials referred to in
Clause No. 502.4.3 of MORT & H. Specification.
9.0 BITUMINOUS BOUND MACADAM (BBM)
Providing and laying Bitumen Bound Macadam surface in 75,
thickness including supplying all materials, spreading 40 mm metal
layers, heating and spraying bitumen at the rate 250 kg/100 sqm
and spreading 12 mm size key aggregate using 60-70 grade
bitumen and compaction with vibratory roller etc. complete.
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9.1 General :
The work consists of supply of all materials and labour required for
providing and laying bituminous bound macadam surface for
compacted thickness of 75 mm This item include preparing the
existing road surface to receive the bituminous bound macadam
course, spreading of 40 mm size metal layers in required thickness
with compaction with vibratory roller, heating and spreading
bitumen with equipment plant etc. Spreading key aggregates 12mm
chips and final compaction with vibratory roller etc. complete. The
work shall be finished in accordance with the requirements of this
specification and in close conformity with grades, lines, cross
sections and thickness as per approved drawing or as directed by the
Engineer in charge.
9.2 MATERIALS :
9.2.1 Bitumen :
The bitumen shall be paving bitumen or suitable penetration grade
within the range S-35 to S-65 or A-35 to A-65 (30/40 to 60/70) as
per Indian Standard Specifications for “Paving bitumen” IS:73-1962.
The actual grade of bitumen be used shall be decided by the
Engineer, appropriate to the region traffic, rainfall and other
environmental conditions.
9.3 AGGREGATES :
The aggregates shall comprise of 40 mm size and broken stone
standard specification clause Rd. 22.3.2, Page 201 of edition 1979,
12 mm size crushed aggregate satisfying standard specifications
clause Rd.41.3.2 Page 216 of edition 1979 for respective size of
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crush metal. The aggregate shall be free from disintegrated pieces,
organic or other deleterious set for in table 500/4 of Ministry of
Surface Transport’s specifications for Road and Bridges edition June
2001.
9.4 PROPORTIONING OF MATERIALS :
The quantities of aggregates and bitumen required for the work of
75 mm compacted bituminous bound macadam is detailed below :
a. 40mm size hand broken metal 9.00 cmt. Per 100 sq.mt.
b. 20mm size crushed metal 1.50 cmt. Per 100 sq.mt.
c. 12mm size key aggregate 1.80 cmt. Per 100 sq.mt.
d. Bitumen 250 kg. per 100 sq.mt.
9.5 PREPARATIONS OF BASE :
The road surface shall be swept clean of all dirt, dust and other
loose and foreign matter. The work shall be performed on such
widths and lengths as directed by Engineer-in-charge and may
required scarifying of existing layer, filling of pot holes etc. The edge
line may be marked with stakes (formed or murum or metal 25 cm
to 30 cm width)
Tack Coat:
Tack Coat our clean surface shall be applied with mechanical
sprayer.
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9.6 SPREADING AND COMPACTION :
9.6.1 Spreading of 40 mm size metal :
40 mm Size hand broken metal shall be spread evenly at the rate of
9 cu.m. per 100 sq.m. of area so as to form layer for camber
correction over the width of road specified on plans. Any foreign
matter, organic matter, dust, grass etc. shall be removed
immediately. The sections shall be checked with camber board,
straight edge batten etc. Any irregularities shall be made good by
adding aggregates in case of depressions and removing aggregates
from high spots.
Compaction of 40 mm size metal :
The surface of 40mm metal layer after brought to necessary grades
shall be rolled with the use of 8 to 10 tons power roller. Rolling shall
be commence from the edges and progress towards the enter
longitudinally exception super elevated portion it shall progress from
the lower to upper edge parallel to the centre line of pavement.
When the roller has passed over the whole area as prepared once,
any high spots or depressions which become apparent shall be
corrected by removing or adding aggregates. The rolling shall then
continued till the entire surface has been rolled to desired
compaction such that there is no crushing of aggregates and all
roller marks have been eliminated. The each pass of roller shall
uniformly overlap not less than one third of the track made in the
preceding pass.
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9.6.2 Spreading of 20 mm size Metal:
20mm size crushed metal shall be evenly spread at the rate of 1.5
Cum. per 100 Sq.mt. of area over the 40 mm size hand broken
metal compacted.
9.6.3 Compaction after Spreading of 20 mm size metal:
The surface of 20 mm metal layer after brought to necessary grades
and sections shall be rolled with the use of vibratory roller. Rolling
shall commence from the edges and progress towards the centre
longitudinally except on super elevated portion it shall progress from
the lower to upper edge parallel to the centre line of pavement.
When the roller has passed over the whole area as prepared once,
any high spots of depression which become apparent shall be
corrected by removing or adding aggregates. The rolling shall then
continued till the entire surface has been rolled to desired
compaction such that there is no crushing of aggregates as all roller
marks have been eliminated. The each part of roller shall uniformly
overlap not less than one third of the track made in the preceding
pass.
9.6.4 Bitumen Application :
Bitumen to be used shall be got approved from Engineer in charge.
Bitumen of IS grade S-35 needs heating to a temperature range
between 177 degrees to 191 degrees. Bitumen other than grade IS
S-35 shall be heated to a temperature appropriate to that grade.
Bitumen shall be applied through a pressure sprayer uniformly at the
rate of 250 kg. Per 100 sq.mt. To ensure correct application of
bitumen being sprayed, known dimensioned area be checked for
use of bitumen and accordingly dosage may be increased or
decreased as the case may be.
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9.6.5 Key Aggregates :
On completion of bitumen application, 12 mm size key aggregate
shall be spread immediately at a uniform rate of 1.8 cum per 100
sq.mt of area when entire surface is in hot condition. Brooms shall
be used to ensure even distribution of key aggregates.
9.6.6 Final Compaction :
Immediately after spreading of bituminous and spreading of
aggregates shall be spread immediately at a uniform rate of 1.8
cum per 100 sq.mtr. of area when entire surface is in not condition.
Brooms shall be used to ensure even distribution of key aggregates.
Immediately after spraying of bitumen and spraying of key
aggregates the surface shall be rolled with a power roller to obtain
full compaction and to force the blindage of key aggregates in to the
interstices of the course aggregate. The rolling shall continue till the
asphalted surface hardens and key aggregates stop moving under
power roller.
9.7 Surface finish and quality control :
The surface finish shall conform to requirements of Clause 902 of
specifications for Roads and Bridges by Ministry of Road Transport &
Highways. Quality control test and their frequencies shall be as per
table 900-3 of specifications for Road and Bridges by Ministry of
Road Transport & Highways.
9.8 Arrangement of Traffic :
During the period of execution, arrangement of traffic shall be
carried out according to the Clause 112 of specification for Roads
and Bridges by Ministry of Road Transport and Highways.
9.9 Item to Include :
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1) Labour and materials required for preparing surface.
2) Supplying and spreading and compaction of 40mm hand
broken size metal and 20mm crushed metal.
3) Supplying, heating and spraying of bitumen.
4) Supplying and spreading and compaction of 12 mm crushed
metal.
9.10 Mode of Measurement for Payment :
The Contract unit rate for finished work of bituminous bound
macadam is in full for carrying out all operations. The finished work
shall be measured in Sqm.
10.0 TACK COAT
10.1 SCOPE
This work shall consist of application of a single coat of low viscosity
liquid bituminous material to an existing road surface preparatory to
the superimposition of a bituminous mix, when specified in the contract
or instructed by the Engineer.
10.2 MATERIALS
10.2.1 Binder
The binder used for tack coat shall be bitumen emulsion complying with
IS 8887 of a type and grade as specified in the contract or as directed
by the Engineer. The use of cutback bitumen as per IS 217 shall be
restricted only for sites at sub-zero temperatures or for emergency
applications as directed by the Engineer.
10.3 WEATHER AND SEASONAL LIMITATIONS
Bituminous material shall not be applied to a wet surface or during a
dust storm or when the weather is foggy, rainy or windy or when the
temperature in the shade is less than 100C. Where the tack coat
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consists of emulsion, the surface shall be slightly damp, but not wet.
Where the tack coat is of cutback bitumen, the surface shall be dry.
10.4 CONSTRUCTION:
10.4.1 Equipment:
The tack coat distributor shall be a self propelled or towed bitumen
pressure sprayer with flow meter arrangement, equipped for spraying
the material uniformly at a specified rate. Hand spraying of small
areas, inaccessible to the distributor, or in narrow strips, shall be
sprayed with a pressure hand sprayer, or as directed by the Engineer.
10.4.2 Preparation of base:
The surface on which the tack coat is to be applied shall be clean and
free from dust, dirt and any extraneous material, and be otherwise
prepared in accordance with the requirements of Clause-501.8 and
902 of MORT&H specifications (Fourth Revision) as appropriate.
Immediately before the application of the tack coat, the surface shall be
swept clean with a mechanical broom, and high pressure air jet, or by
other means as directed by the Engineer.
10.4.3 Application of Tack Coat :
The application of tack coat shall be at the rate as specified in the
Schedule, and shall be applied uniformly. The normal range of
spraying temperature for a bituminous emulsion shall be 200C to 700C
and for cutback 500C to 800C if RC-70/ MC-70 grade is used. Where a
geosynthetic is proposed for use, the provisions of Clauses 703.3.2 and
703.4.4 of MORT&H specifications shall apply. The method of
application of the tack coat will depend on the type of equipment to be
used, size of nozzles, pressure at the spray bar, and speed of forward
movement. The contractor shall demonstrate at a spraying trial, that the
equipment and method to be used is capable of producing a uniform
spray, within the tolerances specified. The bitumen sprayer shall have a
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flow meter arrangement (duly calibrated) for measurement/rate of
spraying and reconciliation of material.
Where the material to receive an overlay is a freshly laid bituminous
layer, that has not been subjected to traffic, or contaminated by dust, a
tack coat is not mandatory where the overlay is completed within two
days.
10.4.4 Curing of tack coat:
The tack coat shall be left to cure until all the volatiles have evaporated
before any subsequent construction is started. No plant or vehicles shall
be allowed on the tack coat other than those essential for the
construction.
10.5 QUALITY CONTROL OF WORK
For control of the quality of materials supplied and the works carried
out, the relevant provisions of Section 900 of MORT&H specifications
(Fourth Revisions) shall apply.
10.6 ARRANGEMENT FOR TRAFFIC:
During the period of construction, the arrangement for traffic shall be
made in accordance with the provisions of Clause 112 of MORT&H
specifications (Fourth Revision).
10.7 MEASUREMENT FOR PAYMENT:
Tack coat shall be measured in terms of surface area of application in
square metres.
10.8 RATE:
The contract unit rate for tack coat shall be payment in full for carrying
out the required operations including for all components listed in
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Clause 401.8 (i) to (v) of MORT&H specifications (Fourth Revision) and
as applicable to the work specified in these specifications. The rate shall
cover the provision of tack coat as per Schedule “A”.
11.0 SEAL COAT
11.1 Scope
11.1.1 This work shall consist of application of a seal coat for sealing the
voids in a bituminous surface laid to the specified levels, grade and
cross fall (camber).
11.1.2 Seal coat shall be of either of the two types as specified below.
(A) Liquid seal coat comprising of an application of a layer of
bituminous binder followed by a cover of stone chip.
(B) Premixed seal coat comprising of a thin application of fine
aggregate premixed with bituminous binder.
11.2 Materials
11.2.1 Binder :
The requirements of Clauses 511.1.2.1 & 511.2.2.1 of MORT&H
Specifications shall apply.
The quantity of bitumen per 10 sqm., shall be 22 kg. for Type A seal
coat.
11.2.2 Stone chips for Type A seal coat :
The stone chips shall consist of angular fragments of clean, hard,
tough and durable rock of uniform quality throughout. They should
be free soft or disintegrated stone, organic or other deleterious
matter. Stone chips shall be of 6.7 mm size defined as 100 percent
passing through 11.2 mm sieve and retained on 2.36 mm sieve. The
quantity used for spreading shall be 0.09 cubic metre per 10 square
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metres area. The chippings shall satisfy the quality requirements in
Table 500-3 of MORT&H specification except that the upper limit for
water absorption value shall be 1 percent.
11.2.3 Aggregates for type B seal coat :
The aggregates shall be sand or grit and shall consist of clean, hard,
durable, uncoated dry particles and shall be free from dust, soft or
flaky/elongated material, organic matter or other deleterious
substances. The aggregate shall pass 2.36 mm sieve and be
retained on 180 micron sieve. The quantity used for premixing shall
be 0.06 cubic metre per 10 square metre area.
11.3 Construction Operations
11.3.1 Weather and seasonal limitations :
The requirements of Clause 501.5.1 of MORT&H specifications shall
apply.
11.3.2 Preparation of base :
The seal coat shall be applied immediately after the laying of
bituminous course which is required to be sealed. Before application
of seal coat materials, the surface shall be cleaned free of any dust
or other extraneous matter.
11.3.3 Construction of type A seal coat :
The bitumen shall be heated to 1500C - 1630C and sprayed at the
rate specified on the dry surface in a uniform manner with a self
propelled mechanical sprayer as described in the Manual for
Construction and Supervision of Bituminous works.
Immediately after the application of binder, stone chips, which shall
be clean and dry, shall be spread uniformly at the rate specified on
the surface preferably by means of a self propelled or towed
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mechanical frit spreader so as to cover the surface completely. If
necessary, the surface shall be brushed to ensure uniform spread of
chips.
Immediately after the application of the cover material, the entire
surface shall be rolled with a 8-10 tonne smooth wheeled steel
roller, 8-10 tonne static weight vibratory roller, or other equipment
approved by the Engineer after laying trials if required. Rolling shall
commence at the edges and progress towards the center except in
super-elevated and uni-directional cambered portions where it shall
proceed from the lower edge to the higher edge. Each pass of the
roller shall uniformly overlap not less than one-third of the track
made in the preceding pass. While rolling is in progress, additional
chips shall be spread by hand in necessary quantities required to
make up irregularities. Rolling shall continue until all aggregate
particles are firmly embedded in the binder and present a uniform
closed surface.
11.3.4 Construction of type B seal coat :
Mixer of appropriate capacity and type approved by the Engineer
shall be used for preparation of mixed material. The plant shall have
separate dryer arrangements for heating aggregate.
The binder shall be heated in boilers of suitable design, approved by
the Engineer to the temperature appropriate to the grade of bitumen
or as directed by the Engineer. The aggregates shall be dry and
suitably heated to a termperature between 1500C and 1600C or as
directed by the Engineer before these components are placed in the
mixer. Mixing of binder with aggregates to the specified proportions
shall be continued until the latter are thoroughly coated with the
former.
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The mix shall be immediately transported from the mixing plant to
the point of use and spread uniformly on the bituminous surface to
be sealed.
As soon as a sufficient length has been covered with the premixed
material, the surface shall be rolled with an 8-10 tonne smooth
wheeled roller. Rolling shall be continued until the premixed material
completely seals the voids in the bituminous course and a smooth
uniform surface is obtained.
11.4 Opening to Traffic
In the case of type B seal coat, traffic may be allowed soon after
final rolling when the premixed material has cooled down to the
surrounding temperature. In the case of Type A seal coat, traffic shall
not be permitted to run on any newly sealed area until the following
day. In the special circumstances, however, the Engineer may open
the road to traffic immediately after rolling, but in such cases traffic
speed shall be rigorously limited to 16km. per hour until the
following day.
11.5 Surface Finish and Quality Control of work
The surface finish of construction shall conform to the requirements
of Clause 902 of MORT&H specifications.
For control on the quality of materials supplied and the works carried
out, the relevant provisions of Section 900 of MORT&H Specifications
shall apply.
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11.6 Arrangement for Traffic :
During the period of construction, arrangements for traffic shall be in
accordance with the provisions of Clause 112 of MORT&H
Specifications.
11.7 Measurements for Payment
Seal Coat, Type A or B shall be measured as finished work, over the
area specified to be covered, in square meters at the thickness
specified in the Contract.
11.8 Rate :
The contract unit rate for seal coat Type A or B shall be payment in
full for carrying out the required operations including full
compensation for all components listed in Clause 501.8.8.2 (i) to (xi)
of MORT&H Specifications.
12.0 Providing Lowering, Laying and Jointing spigot socketed RCC pipe of
NP-2 class of various diameter etc. complete.
12.1 GENERAL :
The item provides for the supply and fixing of the spun concrete
pipes of the specified class and diameter in position for the Cross
Drainage works including necessary collars, conveyance and fixing
in cement mortar 1:2/ Socket Spigot pipes.
12.2 MATERIALS:
Concrete pipes shall be of the class and diameter mentioned in the
item and shall comply with I.S. 458-1971.
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The collars shall be of appropriate size for fixing of the concrete
pipes specified on the drawings and shall comply with the I.S. 458-
1971.
The cement mortar shall comply with the specification No. B.5 (a),
proportion of cement to sand being 1:2.
12.3 Laying:
The excavation shall be confirming to Bd. V.1.3 of Red Book. The
pipes shall be laid to lines, levels & slopes indicated on the drawings
or as ordered by the Engineer. The handling, laying and jointing of
the concrete pipes shall confirm to IS: 783-1985.
The refilling shall be done as per Bd.V.1.5. of Red Book.
12.4 Testing :
Testing shall be as per IS: 458-1988
12.5 FIXING :
The handling and laying of the concrete pipes shall comply with I.S.
783-1985 code of practice of laying concrete pipes.
The pipes shall be laid to the lines and levels shown on the drawings
and the slope shall be 1 in 100 towards the down stream unless
other slopes are specified on the drawing or as ordered by the
Engineer.
The ends of the pipes shall be flush with face of masonry or bell
mouthed if so indicated on the drawings or ordered by the Engineer.
Pipe of non-standard length may be used when standard length
pipes do not fit in between the face of walls. Otherwise extra length
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of standards pipes may be left projecting beyond face of masonry on
the downstream. Such extra length will not be paid for.
Diversions of the road if found necessary, shall be provided
according to BR.1 at the cost of the contractor unless separately
provided in the tender.
The collar/Socket Spigot type joints be cured satisfactorily. Till then
the filling around shall not be done.
12.6 ITEM TO INCLUDE :
1) Supply, conveyance and fixing of the spun concrete pipes
including collars/Socket Spigot type, fixing in cement mortar
1:2 to the line, levels and slope/rubber gasket ring.
2) All labour materials, use of equipment and tools for
completing the item satisfactorily.
12.7 MODE OF MEASUREMENT & PAYMENT :
The measurement shall be for the length of pipes provided and fixed
with collar/Socket Spigot from the outside of one face walls to the
outside of the other face wall, limiting the length to that specified in
the plan, or ordered by the Engineer.
The length shall be measured correct up to a centimeter. The rate
shall be inclusive of all the projecting lengths, if any projections
being ignored in the measurement.
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13.0 PRECAST FACTORY MADE CONCRETE KERB STONES:
Providing PCC precast factory made kerb stone of 500x400x150 mm
size in M-25 grade of concrete using design mix with minimum cement
content as per IS 456.
Note:
PCC Factory made Kerb Stone, RCC Factory made Parabolic Kerb
Stone, Pre Cast RCC Beam, Pre Cast RCC Slab to be procured from
manufacturing agency approved by CIDCO or Agency has to be got
approval of the product from the competent authority.
13.1 MANUFACTURE:
Pre-cast factory made PCC in M-25 grade concrete and of specified
dimensions shall be manufactured in accordance with IS 5758-1970
and generally in accordance with specifications of concrete works as
specified.
13.2 SIZES :
The sizes of kerb stones be as per detailed under Schedule “A”. The
concrete shall consist of grade M-25 laid to the dimensions, lines and
levels shown in the drawing and well compacted by ramming or other
means. The kerb stone then the embedded into cement concrete of
grade M-25 to a minimum thickness of 100 mm all around including
filling in joints with C.M. 1:3 and finishing with neat cement slurry etc.
complete as specified or as directed by the Engineer. After the line and
levels have been checked to be within the specified tolerance the
haunching will be placed taking care that the line and level of the kerbs
is not displaced during the process. All straight kerbs, circular kerbs,
quadrants or other kerbs shall be laid within a vertical or horizontal
tolerances of 3mm from the true line or level.
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13.3 General :
The specifications pertains to cement concrete of the specified
proportion to be laid in raft of strip foundations, thin bedding below
RCC foundations, bedding below paved floors, etc.
13.4 Preparation of Foundation for laying concrete :
Passing foundation :
The foundation shall be passed in writing by the Engineer before
concreting started. The bed of the foundation trenches shall be cleaned
of loose materials and well wetted, if dry to prevent absorption of water
from the green concrete.
In the case of paved floors plinth filling and rubble soling, if any shall
have been well compacted and brought to the required levels etc. and
passed by the Engineer before concrete is allowed to be laid.
13.5 Dewatering:
If the area on which the concrete is to be placed is under water, water
shall be removed as specified for Bd. A.9 of Red Book. Unless
dewatering is separately provided for in the tender, the rate for concrete
shall include the cost of dewatering also.
13.6 Concreting:
The cement concrete shall comply with specification No. B.6 of Red
book for ordinary cement concrete subject to the following:
13.6.1 Proportion:
Proportion of material shall be as mentioned in the wording of the item.
13.6.2 Coarse aggregates :
Coarse aggregates shall be broken from sound stones of the type
mentioned in the item and of approved quality. Maximum size of
aggregate shall not exceed 20 mm.
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13.6.3 Forms:
If the trenches are dug exactly to the dimensions of footings, no forms
will be necessary. But the sides and bottom of the trenches shall be
moistened to the extent necessary to prevent absorption of water from
the concrete.
If, however, footings are dug to dimensions larger than those shown on
the drawings or as directed by the Engineer, forms complying with
specifications No.B.6.5 (b) of Red book shall be used at the contractor's
cost. The side forms shall be removed 48 hours after placement of
concrete.
13.6.4 Mixing :
The concrete shall be mixed in mechanical mixers as specified in B.6.4
of Red Book.
13.6.5 Compaction :
Compaction shall be done with mechanical vibrators. In case of
concrete bedding below paved floors, a screed board shall be used to
get a level or sloped surface as required for the top of the bedding. All
laitance and loose aggregate, if any shall be removed and top surface
left slightly rough to improve bond with the topping.
13.6.6 Tests:
If the Engineer so directs, 6 cubes of 15 cm. Size shall be cast on the
first day tested for compression at 7 and 28 days. Later on, if the
Engineer so directs, 3 cubes shall be tested for every 60 cubic meters of
the concrete cast. No tests need be made for 1:5:10 cement concrete. If
there is doubt the strength of 1:3:8 and 1:4:8 concrete/ tests may be
carried out and their cost borne by the Department if the results are
satisfactory and by the contractor if they are unsatisfactory.
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13.7 Mode of Measurement and Payment:
The contract rate shall be for a unit of one cubic meter of concrete. The
concrete shall be measured foe its strengih, breadth and depth, limiting
dimensions to those specified on the plans or as ordered by the
Engineer. No deductions shall be made for reinforcement in concrete in
RCC work. Individual dimensions shall be measured correct to two
decimals and quantities shall be worked out correct upto two places of
decimals of a cubic meter.
13.8 MEASUREMENT FOR PAYMENT :
Measurement shall be in linear meter up to 0.01 mt. of specified size of
kerb stone provided.
13.9 RATE:
The unit rate shall include all materials, labour, tools & plants etc.
including transportation to site, unloading, excavation, laying,
curing, oil painting, disposal off unsuitable material etc. all required
to complete the job as per drawing.
14.0 PRECAST PARABOLIC KERB STONE
14.0(i) Providing & fixing parabolic shape RCC precast-factory made M25
Grade kerb stone using design mix with minimum cement content as
per IS: 456. (As per IS 456 of size 500/200/850 mm as per detailed
design and drawing including excavation, fixing in PCC of M-15grade
bed 100 mm thick)
Note:
PCC Factory made Kerb Stone, RCC Factory made Parabolic Kerb
Stone, Pre Cast RCC Beam, Pre Cast RCC Slab to be procured from
manufacturing agency approved by CIDCO or Agency has to be got
approval of the product from the competent authority.
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14.1 General :
The specifications pertains to cement concrete of the specified
proportion to be laid in raft of strip foundations, thin bedding below
RCC foundations, bedding below paved floors, etc.
14.2 Preparation of Foundation for laying concrete :
Passing foundation :
The foundation shall be passed in writing by the Engineer before
concreting started. The bed of the foundation trenches shall be cleaned
of loose materials and well wetted, if dry to prevent absorption of water
from the green concrete.
In the case of paved floors plinth filling and rubble soling, if any shall
have been well compacted and brought to the required levels etc. and
passed by the Engineer before concrete is allowed to be laid.
14.3 Dewatering:
If the area on which the concrete is to be placed is under water, water
shall be removed as specified for Bd. A.9 of Red Book. Unless
dewatering is separately provided for in the tender, the rate for concrete
shall include the cost of dewatering also.
14.4 Concreting:
The cement concrete shall comply with specification No. B.6 of Red
book for ordinary cement concrete subject to the following:
14.4.1 Proportion:
Proportion of material shall be as mentioned in the wording of the item.
14.4.2 Coarse aggregates :
Coarse aggregates shall be broken from sound stones of the type
mentioned in the item and of approved quality. Maximum size of
aggregate shall not exceed 20 mm.
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14.4.3 Forms:
If the trenches are dug exactly to the dimensions of footings, no forms
will be necessary. But the sides and bottom of the trenches shall be
moistened to the extent necessary to prevent absorption of water from
the concrete.
If, however, footings are dug to dimensions larger than those shown on
the drawings or as directed by the Engineer, forms complying with
specifications No.B.6.5 (b) of Red book shall be used at the contractor's
cost. The side forms shall be removed 48 hours after placement of
concrete.
14.4.4 Mixing :
The concrete shall be mixed in mechanical mixers as specified in B.6.4
of Red Book.
14.4.5 Compaction :
Compaction shall be done with mechanical vibrators. In case of
concrete bedding below paved floors, a screed board shall be used to
get a level or sloped surface as required for the top of the bedding. All
laitance and loose aggregate, if any shall be removed and top surface
left slightly rough to improve bond with the topping.
14.4.6 Tests:
If the Engineer so directs, 6 cubes of 15 cm. Size shall be cast on the
first day tested for compression at 7 and 28 days. Later on, if the
Engineer so directs, 3 cubes shall be tested for every 60 cubic meters of
the concrete cast. No tests need be made for 1:5:10 cement concrete. If
there is doubt the strength of 1:3:8 and 1:4:8 concrete/ tests may be
carried out and their cost borne by the Department if the results are
satisfactory and by the contractor if they are unsatisfactory.
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14.5 Interval for Starting Masonry :
Masonry, RCC pipes will be allowed to be placed on the concrete 48
hours after completion of concrete. Side filling between the concrete
and sides of excavation shall also be allowed after 48 hours after
placement of concrete. But the material adjoining the concrete shall be
kept wet for the duration of the curing period.
Paving of RCC work over concrete bedding shall be allowed after the
concrete is sufficiently set.
14.6 Item to include :
1) All labour, materials, use of equipment, tools and plant,
installing and removal of scaffolding, false work and forms and
bracing necessary for the satisfactory completion of the item
except reinforcement steel.
2) Providing cement concrete of specified proportion including
transporting, placing and compacting, curing, finishing to the
dimensions and shape shown on the plans to as ordered by the
Engineer.
3) Necessary sampling and tests for materials and concrete.
4) Compensation for injury to person and damages to work or
property.
14.7 Mode of Measurement and Payment:
The contract rate shall be for a unit of one cubic meter of concrete. The
concrete shall be measured foe its strength, breadth and depth, limiting
dimensions to those specified on the plans or as ordered by the
Engineer. No deductions shall be made for reinforcement in concrete in
RCC work. Individual dimensions shall be measured correct to two
decimals and quantities shall be worked out correct upto two places of
decimals of a cubic meter.
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15.0 Providing and constructing B.B. Masonry chamber of 1.2 x 1.2 M.
internal size and depth up to 1.2m. with precast R.C.C. slab cover
with 15 cm. thick 1:3:6 proportion P.C.C. bedding, including
excavation, B.B. Masonry in C.M. 1:5 proportion precast R.C.C
frame and cover etc. complete.
15.1 This item includes all materials and labour mentioned hereafter,