CITY OF LLOYDMINSTER PORTLAND CEMENT CONCRETE PAVEMENT Section 32 13 13 Page 1 of 29 Ver. 2021 1. GENERAL 1.1 DESCRIPTION Portland Cement Concrete Pavement (PCCP) shall consist of a mixture of Portland Cement, fine aggregate, coarse aggregate, water, admixtures and supplementary cementing materials (where required) combined in proportions to meet the Specifications herein. PCCP shall be placed and consolidated on a prepared surface, and fitted with load transfer devices and tie bars, with joint formation and sealing, in conformity to the lines, grades, dimensions, and cross-sections as shown on the Drawings or as directed by the Engineer. 1.2 RELATED WORK .1 Section 31 23 13 – Subgrade Construction. .2 Section 31 24 13 – Roadway Excavation, Embankment and Compaction. .3 Section 32 11 23 – Granular Base. 1.3 REFERENCE STANDARDS .1 Do Portland Cement Concrete Pavement (PCCP) work in accordance with the latest edition of CAN/CSA-A23.1 and testing in accordance with the latest edition of CAN/CSA-A23.2, except where specified otherwise. 1.4 DEFINITIONS For the purposes of this Specification, the following definitions shall apply: .1 Acceptance Limits .1 Slab Thickness and Compressive Strength - Acceptance Limits for Slab Thickness and Compressive Strength are limiting values of the Lot Mean or individual tests within which the PCCP Lot will be accepted at full, increased, or reduced payment, as determined in Section 7. .2 Smoothness - Acceptance Limit for Smoothness is the limiting value of the Surface Tolerance within which the PCCP Sublot will be accepted at full, increased or reduced payment, as determined by Section 7. .3 Early Compressive Strength - Acceptance Limits for determining PCCP adequacy for early opening of the PCCP section to traffic as specified in Section 5.8. .2 End Product Specification (EPS) .1 A specification whereby the Owner does not define the methods of construction. Under EPS, the Engineer will monitor the Contractor's control of the process that produces the items of construction and will accept or reject the end product according to a specified acceptance plan. The Contractor is entirely responsible for quality control. End product acceptance is the responsibility of the Engineer and includes a statistically oriented program of acceptance testing. .3 Mix Design .1 The Mix Design establishes the proportioning of Portland Cement, fine aggregate, coarse aggregate, water, admixtures and supplementary cementing materials to be
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Ver. 2021
1. GENERAL
1.1 DESCRIPTION
Portland Cement Concrete Pavement (PCCP) shall consist of a mixture of Portland Cement,
fine aggregate, coarse aggregate, water, admixtures and supplementary cementing
materials (where required) combined in proportions to meet the Specifications herein. PCCP
shall be placed and consolidated on a prepared surface, and fitted with load transfer devices
and tie bars, with joint formation and sealing, in conformity to the lines, grades, dimensions,
and cross-sections as shown on the Drawings or as directed by the Engineer.
1.2 RELATED WORK
.2 Section 31 24 13 – Roadway Excavation, Embankment and Compaction.
.3 Section 32 11 23 – Granular Base.
1.3 REFERENCE STANDARDS
.1 Do Portland Cement Concrete Pavement (PCCP) work in accordance with the latest edition
of CAN/CSA-A23.1 and testing in accordance with the latest edition of CAN/CSA-A23.2,
except where specified otherwise.
1.4 DEFINITIONS
For the purposes of this Specification, the following definitions shall apply:
.1 Acceptance Limits
.1 Slab Thickness and Compressive Strength - Acceptance Limits for Slab Thickness and
Compressive Strength are limiting values of the Lot Mean or individual tests within
which the PCCP Lot will be accepted at full, increased, or reduced payment, as
determined in Section 7.
.2 Smoothness - Acceptance Limit for Smoothness is the limiting value of the Surface
Tolerance within which the PCCP Sublot will be accepted at full, increased or reduced
payment, as determined by Section 7.
.3 Early Compressive Strength - Acceptance Limits for determining PCCP adequacy for
early opening of the PCCP section to traffic as specified in Section 5.8.
.2 End Product Specification (EPS)
.1 A specification whereby the Owner does not define the methods of construction.
Under EPS, the Engineer will monitor the Contractor's control of the process that
produces the items of construction and will accept or reject the end product according
to a specified acceptance plan. The Contractor is entirely responsible for quality
control. End product acceptance is the responsibility of the Engineer and includes a
statistically oriented program of acceptance testing.
.3 Mix Design
.1 The Mix Design establishes the proportioning of Portland Cement, fine aggregate,
coarse aggregate, water, admixtures and supplementary cementing materials to be
CITY OF LLOYDMINSTER
Ver. 2021
used for production of Portland cement concrete and requires the written approval of
the Engineer prior to production of any Portland Cement concrete under this Contract.
.4 Portland Cement Concrete Pavement (PCCP)
.1 Portland Cement Concrete Pavement (PCCP) is a rigid pavement structure with an
exposed concrete surface which may include concrete shoulders.
.5 PCCP Lot
.1 A PCCP Lot is a portion of the Work being considered for acceptance and is defined
as follows:
.1 the greater of 300m2 or the surface area placed in one day, provided an approved
change has not occurred to the mix design. Approved changes to the mix design
may require the designation of a new PCCP Lot.
.2 One day’s production of less than 300m2 added to the previous or next days day’s
Lot at the Engineer’s option.
.3 If the Engineer suspects a portion of a PCCP Lot is substandard, the Engineer may
order extra testing to define the area and severity of the deficiency. A new Lot will
be designated for this portion if this extra testing indicates the PCCP is subject to
unit price adjustment or rejection.
.4 For PCCP placed by hand or placed off the main alignment the Engineer will define
the Lot size and limits.
.6 PCCP Sublot
.1 A PCCP Sublot is a portion of a PCCP Lot that is one lane (3.9m) wide and a maximum
of 50m long on which the calculation for smoothness is based.
.7 Lot Mean
.1 The Lot Mean is the arithmetic mean of all test results constituting the samples for
the Lot.
.8 Stratified Random Sample
.1 A Stratified Random Sample is a set of test measurements taken one each from five
(5) or more separate (stratified) areas or segments within a Lot in an unbiased way.
.9 Working Depth Cracks
.1 Working depth cracks are full depth cracks that are subject to horizontal and/or
vertical movement.
2. MATERIALS
2.1 Aggregates
.1 The Contractor shall supply all aggregates. Testing to verify compliance with the
requirements of the latest edition of CAN/CSA A23.1 Clauses 4.2.3.3, 4.2.3.4, 4.2.3.5.1,
4.2.3.6, and 4.2.3.7 and Tables 10 to 12 shall be done at least one (1) time per year on
existing stockpiled aggregate to be used on this project and each new aggregate
manufactured for use on this project.
CITY OF LLOYDMINSTER
Ver. 2021
2.2 Air-Entrained Mixtures
.1 The Contractor shall supply and use Air-Entraining admixtures in accordance with the
requirements of the latest edition of ASTM C260/C260M-10a.
2.3 Burlap
.1 The Contractor shall supply burlap that conforms to the requirements of the latest edition
of AASHTO M182-05 Class 4 and shall be free from substances that are deleterious to
concrete.
2.4 Curing Compound
.1 The Contractor shall supply curing compound that conforms to the requirements of the
latest edition of CAN/CSA-A23.1 and ASTM C309-19, except that the application of Type
I curing compounds will not be permitted. The Contractor shall not add any material to
the curing compound as delivered by the manufacturer.
2.5 Joint Materials
.1 Expansion Joint Filler
.1 The Contractor shall supply preformed expansion joint filler in accordance with the
following:
ASTM D1752-04a (2008)
.2 Joint Sealant
.1 Backer Rod
.1 The Contractor shall supply backer rods compatible with the liquid sealant. The
backer rods shall be made of polyethylene foam, cross-linked polyethylene foam
or polyurethane and shall conform to the requirements of the latest edition of
ASTM D5249-10
.2 Liquid Sealant
.1 The Contractor shall supply liquid sealant that conforms to the requirements of
the latest edition of ASTM D6690-15 (Types I and II), ASTM D3406-95 (2006)
or ASTM D5893-04.
.3 Compression Seal
.1 The Contractor shall supply preformed compression seals. Preformed
compression seals shall conform to the requirements of the latest edition of
ASTM D2628-91 (2016).
2.6 Moisture Vapour Barrier for Curing
.1 The Contractor shall supply moisture vapour barrier that is white opaque polyethylene
film and that conforms to the requirements of the latest edition of ASTM C171-16.
2.7 Portland Cement
.1 The Contractor shall supply Portland cement in accordance with specific requirements in
the latest edition of CAN/CSA-A23.1, as further outlined in this specification. The specific
test procedures contained in CAN/CSA-A23.2that are to be used are further outlined in
this specification.
Ver. 2021
2.8 Supplementary Cementing Materials
.1 Supplementary cementing materials, including silica fume and Fly Ash shall meet the
requirements of the latest edition of CAN/CSA-A3000-18.
2.9 Tie Bars and Dowels
.1 Tie Bars:
.1 The Contractor shall supply tie bars to the dimensions as indicated on the Drawings.
Tie bars shall be 15M, epoxy coated, deformed reinforcing bars that conform to the
requirements of the latest edition of ASTM A775/ASTM A775M-17.
.2 Dowels:
.1 The Contractor shall supply dowels to the dimensions as indicated on the Drawings.
Dowel bars shall be plain round bars of grade 300 or better conforming to the
requirements of the latest edition of CAN/CSA-G40.21-13 and shall be epoxy coated
to the requirements of the latest edition of ASTM A775/ASTM A775M-19. For at least
half their length, the dowels shall be coated with oil, grease or other suitable form
release agent. The coating shall be applied at the same end of all dowels with
reference to the direction of concrete placement.
2.10 Water
.1 The Contractor shall supply all water required for mixing and curing in accordance with
the requirements of CAN/CSA 4.2.2.
3. PORTLAND CEMENT CONCRETE MIX DESIGN
3.1 Responsibility for Mix Design
.1 Preparation and submission of PCCP mix designs for Engineer verification and approval
are the responsibility of the Contractor. The sampling and testing of aggregates and the
concrete mix design shall be completed by an independent Category 1 CSA-certified
concrete testing laboratory which shall be registered with either APEGS or APEGA
depending on the location of the work. The testing laboratory shall provide an engineering
opinion that the concrete aggregate and mix designs are suitable for the intended use
and are expected to perform to specified standards.
.2 All costs incurred in mix design formulation are the responsibility of the Contractor.
Shipping costs for samples sent to the Engineer for verification and approval are the
responsibility of the Contractor.
The mix design shall meet the following requirements:
.1 The concrete shall have a minimum flexural strength of 4.2MPa at 28 days and a minimum
flexural strength 3.2MPa and a maximum flexural strength of 4.5MPa at 7 days.
.2 The minimum compressive strength at 28 days shall be the greater of 32MPa or the
compressive strength required to provide a minimum flexural strength at 28 days of
4.2MPa.
.3 The nominal maximum size of coarse aggregate shall be either 20-5 mm or 28-5 mm.
.4 Aggregate for concrete shall conform to the limits and requirements of Table 12 of
CAN/CSA-A23.1-19.
Ver. 2021
.5 The concrete mix shall be proportioned in accordance with CAN/CSA/A23.2:19 to avoid
deleterious expansion due to alkali-aggregate reactivity in a service life of thirty (30)
years.
.6 The slump of the concrete shall be 30mm ±10mm if the concrete is slip formed and 70mm
±20mm if hand placed.
.7 The entrained air content of the concrete shall be 5.0% to 8.0%.
.8 The air-void spacing factor shall be determined in accordance with ASTM C457/C457M-
16, modified point-count method at 100X times magnification. The average of all tests
shall not exceed 230µm with no single test greater than 260µm.
.9 The maximum water/cementing materials ratio shall be 0.45.
.10 The minimum cementing materials content shall be 335kg/m3. The minimum cement
content shall be 300kg/ m3.
.11 Supplementary cementing materials shall be restricted to the following proportions by
mass of total cementing materials:
.1 silica fume up to 8%
.2 fly ash up to 25%
.12 Determination of organic impurities in the fine aggregate shall be completed in accordance
with the latest edition of CAN/CSA A23.2:19 and ASTM D 1544-04(2018).
.13 Class of Exposure: C-2
3.3 Approval of Mix Design
.1 The Contractor shall determine the 28 day compressive strength that provides a minimum
flexural strength of 4.2 MPa at 28 days. The 28 day compressive strength and the 28 day
flexural strength shall be determined in accordance with the requirements of the latest
edition of CAN/CSA A23.1 and CAN/CSA A23.2.
.2 Mix designs shall be subject to the approval of the Engineer. The Contractor shall submit
the mix design to the Engineer for verification and approval a minimum of four (4) weeks
prior to commencement of the Contract. The Contractor's submission shall include the
following information:
.3 The nominal maximum size of coarse aggregate (mm).
.4 The coarse aggregate content (kg/m3).
.5 The fine aggregate content (kg/m3).
.6 The source(s) and location(s) of the coarse and fine aggregates.
.7 The gradation of the coarse and fine aggregates to be used in the mix.
.8 Test results indicating compliance with the latest edition of CAN/CSA-A23.1:19
(Organic Impurities in Sand for Concrete - Color Plate).
.9 Test results indicating compliance with Section 3.2.4.
.10 The results from the alkali aggregate reactivity tests.
.11 The target slump of the concrete (mm).
.12 The entrained air content of the concrete (% by volume).
.13 The water/cementing materials ratio (% by mass).
.14 The cementing materials content (kg/m3) and proportions (% by mass).
.15 Linear Traverse test results indicating compliance with Section 3.2.8.
CITY OF LLOYDMINSTER
Ver. 2021
.16 All data on proposed concrete admixtures and/or fibers.
.17 The results of trial batch testing for the concrete mix for compliance with
specified concrete properties. Any changes in the materials and/or quantities
shall require a new trial batch testing.
OR
.2 In the case of proprietary mix designs, the sampling and testing of aggregates and the
concrete mix design shall be completed by an independent CSA certified and qualified
concrete testing laboratory which shall be registered with either AEPEGS or APEGA
depending on the location of the work. Concrete mix designs including sampling and testing
of aggregates may be completed by the concrete supplier with the condition that the
documentation is stamped by a Professional Engineer registered and licensed to practice in
the Province of Alberta or Saskatchewan. For these situations, the mix design shall be
reviewed and stamped for compliance with respective specifications by an independent CSA
certified and qualified concrete testing laboratory. For either case, the testing laboratory
shall provide an engineering opinion that concrete aggregate and mix designs are suitable
for the intended use and are expected to perform to the specified standards.
.3 The Contractor shall submit the proposed mix design for the concrete for the Engineer’s
review at least two weeks before scheduled placing of concrete. Sampling and testing of
aggregates shall fully represent the material to be used in the production of concrete for
PCCP. Sampling and testing shall have been conducted not more than 180 days prior to
the start of production of concrete for PCCP.
.4 Where required by the Engineer for any change in the nature or sources of the aggregates,
or where a new mix design is desired by the Contractor, the Contractor shall provide a
separate and complete mix design. This new mix design shall be subject to the approval of
the Engineer.
.5 PCCP mix produced and placed prior to the Contractor receiving the Engineer’s written
approval of the mix design will not be accepted and will be subject to removal and
replacement with approved-mix PCCP concrete at the Contractor’s expense.
The Contractor is responsible for producing mixes that conform to the Specifications.
4. SAMPLING AND TESTING
4.1 General
.1 During the progress of the work, testing is to be carried out on materials and workmanship
in order to ensure compliance with the requirements of the Specifications.
.2 The Engineer’s approval of any materials or mixture shall in no way relieve the Contractor
from his obligation to provide materials, mixtures and workmanship in accordance with
the Specifications.
.3 Where specified, random sampling procedures shall be followed, and where no specific
random sampling procedure is specified, the sampling procedure will be as identified by
the Engineer in the case of acceptance testing and by the Contractor in the case of quality
control testing.
.4 The Engineer shall have access to the Work at all times for taking samples. The Contractor
shall provide any assistance necessary for taking samples and shall reinstate pavement
layers or other structures to the satisfaction of the Engineer at the positions where
CITY OF LLOYDMINSTER
Ver. 2021
samples have been taken. Compensation for providing assistance with sampling and for
reinstatement where samples are taken shall be included in the unit price bid for the
various items of work tested and no separate payment will be made.
.5 The Contractor shall provide, at his own expense, sampling devices and other facilities
which the Engineer may require to safely obtain representative samples of the item being
produced.
.1 General
.1 Quality Control Testing is the responsibility of the Contractor throughout every stage
of the Work. Tests performed by the Engineer will not be considered to be quality
control tests. The Contractor shall provide and pay for CSA certified personnel and
equipment to perform all quality control sampling and testing necessary to determine
and monitor the characteristics of the materials produced and incorporated into the
Work, and the final product.
.2 All costs associated with PCCP coring for quality control testing shall be the
responsibility of the Contractor.
.3 Test methods and sampling requirements are described in Table 4.2.2, Quality
Control Testing Requirements. The frequency of tests shall conform to the
requirements of the latest edition of CAN/CSA-A23.1. The Engineer may require an
increase in the frequency of any quality control test which has a specified minimum
frequency. The Contractor shall pay for any additional tests required by the Engineer.
.4 Results of all quality control tests shall be submitted to the Engineer, Contractor, and
Concrete Suppler (where applicable) within twenty-four (24) hours of their availability.
.5 The Contractor shall bear the cost of all consulting services retained by him.
.6 The Contractor shall be totally responsible for production of aggregates and mixes
that meet all the specified requirements.
.2 Quality Control Testing Requirements
.1 Unless otherwise specified, the most recent editions of the following standard test
methods shall apply. The Contractor shall conduct the Quality Control Testing in
accordance with the following:
Test Standard
(Latest edition)
Minimum Frequency
Compressive Strength
CAN/CSA-A23.2-3C & 9C
Not specified
Note 1
Ver. 2021
5.10
Material
Factor
CAN/CSA-A23.2-6C
Not specified, other than that required for Uniformity of Mixed Concrete
Slump**
CAN/CSA-A23.2-5C
of concrete place
.1 *Note 1 - Determination of in-situ strength for opening to traffic shall be the
responsibility of the Contractor. The Contractor shall be required to submit a
proposed in-situ strength testing program to the Engineer for approval at least two
(2) weeks prior to commencing production of PCCP.
.2 **Note 2 - Air Content and Slump shall be checked on the first five (5) loads of the
day and every fifth (5th) load thereafter. The results shall be recorded in tabular form
and turned over to the Engineer at the conclusion of each day’s pour.
.1 Failure to meet Slump and/or Air Requirements
.1 In the event that actual slump is outside the specified tolerance or
the actual air content is higher than the specified tolerance as
determined by the Contractor's or the Engineer’s testing, the
Contractor shall be required to submit adjustments to the mix design
or operations to correct the deficient condition, provided the
adjustments made prevent future occurrences and are to the
satisfaction of the Engineer.
.2 In the case of the air content being lower than specified tolerance,
the Contractor shall be required to submit the results of testing in
which the concrete placed is in compliance with Section 3.2.8
Sampling and testing costs associated with verifying the suitability
of suspect concrete shall be the responsibility of the Contractor.
.2 Uniformity of Mixed Concrete
.1 Testing for equipment or construction process suitability shall be
completed by the Contractor, in the presence of the Engineer, on
the first day of PCCP placement at a mutually agreed upon time.
.2 The concrete will be judged to be uniform or non-uniform based
upon the range for each test procedure, compared to the criteria
listed in Table 4.2.2.2 as follows:
CITY OF LLOYDMINSTER
Ver. 2021
a) Where the range, within each test procedure, is equal to or less
than the acceptance limit, the concrete shall be considered
uniform.
b) Where the range within any single test procedure is greater than
the rejection limit, the concrete shall be considered non-
uniform.
c) Where the range of any single test procedure falls between the
acceptance and rejection limits, additional samples shall be
taken on the next consecutive batch or load delivered by that
unit and tested. If the range within any single test procedure is
greater than the acceptance limit, the concrete shall be
considered non-uniform.
.3 If the concrete has been considered non-uniform, the equipment
and/or construction process shall be rejected. The equipment shall
not be used until it passes a retest, nor shall it be submitted for
retesting unless the condition presumed to have caused the lack of
uniformity has been corrected.
.4 The Engineer may order the testing for uniformity of mixed concrete
to be repeated at any time there is a change in mix design,
equipment or construction process.
.1 General
.1 Within this Specification, certain requirements, limits, and tolerances are specified
regarding the quality of materials and workmanship to be supplied. Compliance with
these requirements where so specified will…
1. GENERAL
1.1 DESCRIPTION
Portland Cement Concrete Pavement (PCCP) shall consist of a mixture of Portland Cement,
fine aggregate, coarse aggregate, water, admixtures and supplementary cementing
materials (where required) combined in proportions to meet the Specifications herein. PCCP
shall be placed and consolidated on a prepared surface, and fitted with load transfer devices
and tie bars, with joint formation and sealing, in conformity to the lines, grades, dimensions,
and cross-sections as shown on the Drawings or as directed by the Engineer.
1.2 RELATED WORK
.2 Section 31 24 13 – Roadway Excavation, Embankment and Compaction.
.3 Section 32 11 23 – Granular Base.
1.3 REFERENCE STANDARDS
.1 Do Portland Cement Concrete Pavement (PCCP) work in accordance with the latest edition
of CAN/CSA-A23.1 and testing in accordance with the latest edition of CAN/CSA-A23.2,
except where specified otherwise.
1.4 DEFINITIONS
For the purposes of this Specification, the following definitions shall apply:
.1 Acceptance Limits
.1 Slab Thickness and Compressive Strength - Acceptance Limits for Slab Thickness and
Compressive Strength are limiting values of the Lot Mean or individual tests within
which the PCCP Lot will be accepted at full, increased, or reduced payment, as
determined in Section 7.
.2 Smoothness - Acceptance Limit for Smoothness is the limiting value of the Surface
Tolerance within which the PCCP Sublot will be accepted at full, increased or reduced
payment, as determined by Section 7.
.3 Early Compressive Strength - Acceptance Limits for determining PCCP adequacy for
early opening of the PCCP section to traffic as specified in Section 5.8.
.2 End Product Specification (EPS)
.1 A specification whereby the Owner does not define the methods of construction.
Under EPS, the Engineer will monitor the Contractor's control of the process that
produces the items of construction and will accept or reject the end product according
to a specified acceptance plan. The Contractor is entirely responsible for quality
control. End product acceptance is the responsibility of the Engineer and includes a
statistically oriented program of acceptance testing.
.3 Mix Design
.1 The Mix Design establishes the proportioning of Portland Cement, fine aggregate,
coarse aggregate, water, admixtures and supplementary cementing materials to be
CITY OF LLOYDMINSTER
Ver. 2021
used for production of Portland cement concrete and requires the written approval of
the Engineer prior to production of any Portland Cement concrete under this Contract.
.4 Portland Cement Concrete Pavement (PCCP)
.1 Portland Cement Concrete Pavement (PCCP) is a rigid pavement structure with an
exposed concrete surface which may include concrete shoulders.
.5 PCCP Lot
.1 A PCCP Lot is a portion of the Work being considered for acceptance and is defined
as follows:
.1 the greater of 300m2 or the surface area placed in one day, provided an approved
change has not occurred to the mix design. Approved changes to the mix design
may require the designation of a new PCCP Lot.
.2 One day’s production of less than 300m2 added to the previous or next days day’s
Lot at the Engineer’s option.
.3 If the Engineer suspects a portion of a PCCP Lot is substandard, the Engineer may
order extra testing to define the area and severity of the deficiency. A new Lot will
be designated for this portion if this extra testing indicates the PCCP is subject to
unit price adjustment or rejection.
.4 For PCCP placed by hand or placed off the main alignment the Engineer will define
the Lot size and limits.
.6 PCCP Sublot
.1 A PCCP Sublot is a portion of a PCCP Lot that is one lane (3.9m) wide and a maximum
of 50m long on which the calculation for smoothness is based.
.7 Lot Mean
.1 The Lot Mean is the arithmetic mean of all test results constituting the samples for
the Lot.
.8 Stratified Random Sample
.1 A Stratified Random Sample is a set of test measurements taken one each from five
(5) or more separate (stratified) areas or segments within a Lot in an unbiased way.
.9 Working Depth Cracks
.1 Working depth cracks are full depth cracks that are subject to horizontal and/or
vertical movement.
2. MATERIALS
2.1 Aggregates
.1 The Contractor shall supply all aggregates. Testing to verify compliance with the
requirements of the latest edition of CAN/CSA A23.1 Clauses 4.2.3.3, 4.2.3.4, 4.2.3.5.1,
4.2.3.6, and 4.2.3.7 and Tables 10 to 12 shall be done at least one (1) time per year on
existing stockpiled aggregate to be used on this project and each new aggregate
manufactured for use on this project.
CITY OF LLOYDMINSTER
Ver. 2021
2.2 Air-Entrained Mixtures
.1 The Contractor shall supply and use Air-Entraining admixtures in accordance with the
requirements of the latest edition of ASTM C260/C260M-10a.
2.3 Burlap
.1 The Contractor shall supply burlap that conforms to the requirements of the latest edition
of AASHTO M182-05 Class 4 and shall be free from substances that are deleterious to
concrete.
2.4 Curing Compound
.1 The Contractor shall supply curing compound that conforms to the requirements of the
latest edition of CAN/CSA-A23.1 and ASTM C309-19, except that the application of Type
I curing compounds will not be permitted. The Contractor shall not add any material to
the curing compound as delivered by the manufacturer.
2.5 Joint Materials
.1 Expansion Joint Filler
.1 The Contractor shall supply preformed expansion joint filler in accordance with the
following:
ASTM D1752-04a (2008)
.2 Joint Sealant
.1 Backer Rod
.1 The Contractor shall supply backer rods compatible with the liquid sealant. The
backer rods shall be made of polyethylene foam, cross-linked polyethylene foam
or polyurethane and shall conform to the requirements of the latest edition of
ASTM D5249-10
.2 Liquid Sealant
.1 The Contractor shall supply liquid sealant that conforms to the requirements of
the latest edition of ASTM D6690-15 (Types I and II), ASTM D3406-95 (2006)
or ASTM D5893-04.
.3 Compression Seal
.1 The Contractor shall supply preformed compression seals. Preformed
compression seals shall conform to the requirements of the latest edition of
ASTM D2628-91 (2016).
2.6 Moisture Vapour Barrier for Curing
.1 The Contractor shall supply moisture vapour barrier that is white opaque polyethylene
film and that conforms to the requirements of the latest edition of ASTM C171-16.
2.7 Portland Cement
.1 The Contractor shall supply Portland cement in accordance with specific requirements in
the latest edition of CAN/CSA-A23.1, as further outlined in this specification. The specific
test procedures contained in CAN/CSA-A23.2that are to be used are further outlined in
this specification.
Ver. 2021
2.8 Supplementary Cementing Materials
.1 Supplementary cementing materials, including silica fume and Fly Ash shall meet the
requirements of the latest edition of CAN/CSA-A3000-18.
2.9 Tie Bars and Dowels
.1 Tie Bars:
.1 The Contractor shall supply tie bars to the dimensions as indicated on the Drawings.
Tie bars shall be 15M, epoxy coated, deformed reinforcing bars that conform to the
requirements of the latest edition of ASTM A775/ASTM A775M-17.
.2 Dowels:
.1 The Contractor shall supply dowels to the dimensions as indicated on the Drawings.
Dowel bars shall be plain round bars of grade 300 or better conforming to the
requirements of the latest edition of CAN/CSA-G40.21-13 and shall be epoxy coated
to the requirements of the latest edition of ASTM A775/ASTM A775M-19. For at least
half their length, the dowels shall be coated with oil, grease or other suitable form
release agent. The coating shall be applied at the same end of all dowels with
reference to the direction of concrete placement.
2.10 Water
.1 The Contractor shall supply all water required for mixing and curing in accordance with
the requirements of CAN/CSA 4.2.2.
3. PORTLAND CEMENT CONCRETE MIX DESIGN
3.1 Responsibility for Mix Design
.1 Preparation and submission of PCCP mix designs for Engineer verification and approval
are the responsibility of the Contractor. The sampling and testing of aggregates and the
concrete mix design shall be completed by an independent Category 1 CSA-certified
concrete testing laboratory which shall be registered with either APEGS or APEGA
depending on the location of the work. The testing laboratory shall provide an engineering
opinion that the concrete aggregate and mix designs are suitable for the intended use
and are expected to perform to specified standards.
.2 All costs incurred in mix design formulation are the responsibility of the Contractor.
Shipping costs for samples sent to the Engineer for verification and approval are the
responsibility of the Contractor.
The mix design shall meet the following requirements:
.1 The concrete shall have a minimum flexural strength of 4.2MPa at 28 days and a minimum
flexural strength 3.2MPa and a maximum flexural strength of 4.5MPa at 7 days.
.2 The minimum compressive strength at 28 days shall be the greater of 32MPa or the
compressive strength required to provide a minimum flexural strength at 28 days of
4.2MPa.
.3 The nominal maximum size of coarse aggregate shall be either 20-5 mm or 28-5 mm.
.4 Aggregate for concrete shall conform to the limits and requirements of Table 12 of
CAN/CSA-A23.1-19.
Ver. 2021
.5 The concrete mix shall be proportioned in accordance with CAN/CSA/A23.2:19 to avoid
deleterious expansion due to alkali-aggregate reactivity in a service life of thirty (30)
years.
.6 The slump of the concrete shall be 30mm ±10mm if the concrete is slip formed and 70mm
±20mm if hand placed.
.7 The entrained air content of the concrete shall be 5.0% to 8.0%.
.8 The air-void spacing factor shall be determined in accordance with ASTM C457/C457M-
16, modified point-count method at 100X times magnification. The average of all tests
shall not exceed 230µm with no single test greater than 260µm.
.9 The maximum water/cementing materials ratio shall be 0.45.
.10 The minimum cementing materials content shall be 335kg/m3. The minimum cement
content shall be 300kg/ m3.
.11 Supplementary cementing materials shall be restricted to the following proportions by
mass of total cementing materials:
.1 silica fume up to 8%
.2 fly ash up to 25%
.12 Determination of organic impurities in the fine aggregate shall be completed in accordance
with the latest edition of CAN/CSA A23.2:19 and ASTM D 1544-04(2018).
.13 Class of Exposure: C-2
3.3 Approval of Mix Design
.1 The Contractor shall determine the 28 day compressive strength that provides a minimum
flexural strength of 4.2 MPa at 28 days. The 28 day compressive strength and the 28 day
flexural strength shall be determined in accordance with the requirements of the latest
edition of CAN/CSA A23.1 and CAN/CSA A23.2.
.2 Mix designs shall be subject to the approval of the Engineer. The Contractor shall submit
the mix design to the Engineer for verification and approval a minimum of four (4) weeks
prior to commencement of the Contract. The Contractor's submission shall include the
following information:
.3 The nominal maximum size of coarse aggregate (mm).
.4 The coarse aggregate content (kg/m3).
.5 The fine aggregate content (kg/m3).
.6 The source(s) and location(s) of the coarse and fine aggregates.
.7 The gradation of the coarse and fine aggregates to be used in the mix.
.8 Test results indicating compliance with the latest edition of CAN/CSA-A23.1:19
(Organic Impurities in Sand for Concrete - Color Plate).
.9 Test results indicating compliance with Section 3.2.4.
.10 The results from the alkali aggregate reactivity tests.
.11 The target slump of the concrete (mm).
.12 The entrained air content of the concrete (% by volume).
.13 The water/cementing materials ratio (% by mass).
.14 The cementing materials content (kg/m3) and proportions (% by mass).
.15 Linear Traverse test results indicating compliance with Section 3.2.8.
CITY OF LLOYDMINSTER
Ver. 2021
.16 All data on proposed concrete admixtures and/or fibers.
.17 The results of trial batch testing for the concrete mix for compliance with
specified concrete properties. Any changes in the materials and/or quantities
shall require a new trial batch testing.
OR
.2 In the case of proprietary mix designs, the sampling and testing of aggregates and the
concrete mix design shall be completed by an independent CSA certified and qualified
concrete testing laboratory which shall be registered with either AEPEGS or APEGA
depending on the location of the work. Concrete mix designs including sampling and testing
of aggregates may be completed by the concrete supplier with the condition that the
documentation is stamped by a Professional Engineer registered and licensed to practice in
the Province of Alberta or Saskatchewan. For these situations, the mix design shall be
reviewed and stamped for compliance with respective specifications by an independent CSA
certified and qualified concrete testing laboratory. For either case, the testing laboratory
shall provide an engineering opinion that concrete aggregate and mix designs are suitable
for the intended use and are expected to perform to the specified standards.
.3 The Contractor shall submit the proposed mix design for the concrete for the Engineer’s
review at least two weeks before scheduled placing of concrete. Sampling and testing of
aggregates shall fully represent the material to be used in the production of concrete for
PCCP. Sampling and testing shall have been conducted not more than 180 days prior to
the start of production of concrete for PCCP.
.4 Where required by the Engineer for any change in the nature or sources of the aggregates,
or where a new mix design is desired by the Contractor, the Contractor shall provide a
separate and complete mix design. This new mix design shall be subject to the approval of
the Engineer.
.5 PCCP mix produced and placed prior to the Contractor receiving the Engineer’s written
approval of the mix design will not be accepted and will be subject to removal and
replacement with approved-mix PCCP concrete at the Contractor’s expense.
The Contractor is responsible for producing mixes that conform to the Specifications.
4. SAMPLING AND TESTING
4.1 General
.1 During the progress of the work, testing is to be carried out on materials and workmanship
in order to ensure compliance with the requirements of the Specifications.
.2 The Engineer’s approval of any materials or mixture shall in no way relieve the Contractor
from his obligation to provide materials, mixtures and workmanship in accordance with
the Specifications.
.3 Where specified, random sampling procedures shall be followed, and where no specific
random sampling procedure is specified, the sampling procedure will be as identified by
the Engineer in the case of acceptance testing and by the Contractor in the case of quality
control testing.
.4 The Engineer shall have access to the Work at all times for taking samples. The Contractor
shall provide any assistance necessary for taking samples and shall reinstate pavement
layers or other structures to the satisfaction of the Engineer at the positions where
CITY OF LLOYDMINSTER
Ver. 2021
samples have been taken. Compensation for providing assistance with sampling and for
reinstatement where samples are taken shall be included in the unit price bid for the
various items of work tested and no separate payment will be made.
.5 The Contractor shall provide, at his own expense, sampling devices and other facilities
which the Engineer may require to safely obtain representative samples of the item being
produced.
.1 General
.1 Quality Control Testing is the responsibility of the Contractor throughout every stage
of the Work. Tests performed by the Engineer will not be considered to be quality
control tests. The Contractor shall provide and pay for CSA certified personnel and
equipment to perform all quality control sampling and testing necessary to determine
and monitor the characteristics of the materials produced and incorporated into the
Work, and the final product.
.2 All costs associated with PCCP coring for quality control testing shall be the
responsibility of the Contractor.
.3 Test methods and sampling requirements are described in Table 4.2.2, Quality
Control Testing Requirements. The frequency of tests shall conform to the
requirements of the latest edition of CAN/CSA-A23.1. The Engineer may require an
increase in the frequency of any quality control test which has a specified minimum
frequency. The Contractor shall pay for any additional tests required by the Engineer.
.4 Results of all quality control tests shall be submitted to the Engineer, Contractor, and
Concrete Suppler (where applicable) within twenty-four (24) hours of their availability.
.5 The Contractor shall bear the cost of all consulting services retained by him.
.6 The Contractor shall be totally responsible for production of aggregates and mixes
that meet all the specified requirements.
.2 Quality Control Testing Requirements
.1 Unless otherwise specified, the most recent editions of the following standard test
methods shall apply. The Contractor shall conduct the Quality Control Testing in
accordance with the following:
Test Standard
(Latest edition)
Minimum Frequency
Compressive Strength
CAN/CSA-A23.2-3C & 9C
Not specified
Note 1
Ver. 2021
5.10
Material
Factor
CAN/CSA-A23.2-6C
Not specified, other than that required for Uniformity of Mixed Concrete
Slump**
CAN/CSA-A23.2-5C
of concrete place
.1 *Note 1 - Determination of in-situ strength for opening to traffic shall be the
responsibility of the Contractor. The Contractor shall be required to submit a
proposed in-situ strength testing program to the Engineer for approval at least two
(2) weeks prior to commencing production of PCCP.
.2 **Note 2 - Air Content and Slump shall be checked on the first five (5) loads of the
day and every fifth (5th) load thereafter. The results shall be recorded in tabular form
and turned over to the Engineer at the conclusion of each day’s pour.
.1 Failure to meet Slump and/or Air Requirements
.1 In the event that actual slump is outside the specified tolerance or
the actual air content is higher than the specified tolerance as
determined by the Contractor's or the Engineer’s testing, the
Contractor shall be required to submit adjustments to the mix design
or operations to correct the deficient condition, provided the
adjustments made prevent future occurrences and are to the
satisfaction of the Engineer.
.2 In the case of the air content being lower than specified tolerance,
the Contractor shall be required to submit the results of testing in
which the concrete placed is in compliance with Section 3.2.8
Sampling and testing costs associated with verifying the suitability
of suspect concrete shall be the responsibility of the Contractor.
.2 Uniformity of Mixed Concrete
.1 Testing for equipment or construction process suitability shall be
completed by the Contractor, in the presence of the Engineer, on
the first day of PCCP placement at a mutually agreed upon time.
.2 The concrete will be judged to be uniform or non-uniform based
upon the range for each test procedure, compared to the criteria
listed in Table 4.2.2.2 as follows:
CITY OF LLOYDMINSTER
Ver. 2021
a) Where the range, within each test procedure, is equal to or less
than the acceptance limit, the concrete shall be considered
uniform.
b) Where the range within any single test procedure is greater than
the rejection limit, the concrete shall be considered non-
uniform.
c) Where the range of any single test procedure falls between the
acceptance and rejection limits, additional samples shall be
taken on the next consecutive batch or load delivered by that
unit and tested. If the range within any single test procedure is
greater than the acceptance limit, the concrete shall be
considered non-uniform.
.3 If the concrete has been considered non-uniform, the equipment
and/or construction process shall be rejected. The equipment shall
not be used until it passes a retest, nor shall it be submitted for
retesting unless the condition presumed to have caused the lack of
uniformity has been corrected.
.4 The Engineer may order the testing for uniformity of mixed concrete
to be repeated at any time there is a change in mix design,
equipment or construction process.
.1 General
.1 Within this Specification, certain requirements, limits, and tolerances are specified
regarding the quality of materials and workmanship to be supplied. Compliance with
these requirements where so specified will…
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