Grading CurvesGrading Curves for 20mm MSA (Road Note-4, RRL, UK)IS Sieves (mm)Percentage PassingCurve (1)Curve(2)Curve(3)Curve(4)*Curve(5)40100201001001001001001045556575724.7530354248402.3623283542301.2016212834250.6009142127150.3002351240.1500001.50
Input Data TablesTable-1Minimum Cement Contents and Maximum W/C ratio for different exposure with normal weight Aggregate of 20mm Nominal maxium size as per IS:456-2000Table-4:Workability for different purposes and appropriate test values ExposurePlain Concrete (PCC)Reinforced Concrete (RCC)Minimum grade of ConcreteDegree of workabilityPlacing conditionsNominal MAS (mm)Compaction factor Slump (mm)Vebe time (s)Min Cement Kg/m3Max Free W/CMin Cement Kg/m3Max Free W/CPCCRCCExtremely Low Section subject to extremely intensive or prolonged vibration; pressure may also be required100.650over 20Mild2200.63000.55----M20200.680Moderate2500.63000.5M15M20Very lowSmall sections subject to intensive vibration and large sections to normal vibrations100.7507-20Severe2600.53500.45M20M25200.780-10Very Severe3000.454000.45M20M35400.780-25Extreme3000.44000.4M25M40LowSimply reinforced sections with good vibration and large sections to normal vibrations100.830-55-10Note: Minimum Cement Content is irrespective of grade of Cement200.8510-25400.8525-50Table-2Adjustments to Minimum Cement Contents for aggregates other than 20mm nominal maximum size as per IS:456-2000MediumSimply reinforced sections with normal vibration and heavily reinforced sections with good vibrations100.95-253-5Nominal Max. Agg. Size (mm)Adjustments in Minimum Cements in Table- 1 (Kg/m3)200.9225-50400.9250-10010+40HighHeavily reinforced sections with light vibrations100.9525-1002-315+2010 20 400.9550-12520+00400.95100-17530-15Very highCast in situ plies or structures with very heavy reinforcement and light /no vibration100.97100-1500-240-30
Table-3Exposure Conditions:200.97125-200Mild-Concrete surface protected against weather or aggressive conditions400.98>200Moderate-Concrete surfaces sheltered from severe rain or freezing whilst wetTable-5: Maximum size of the aggregate (MSA)Concrete continuously under water.Percentage of Aggregates passing 20mm sieve Maximum Aggregate Size (MAS)Concrete exposed to condensation and rainConcrete exposed to non-aggressive sub-soil/ground water or coastal environmentSevere-Concrete surfaces exposed to severe rain, alternate wetting and drying or occasional freezing whilst wet or severe condensation0-2540Concrete in contact or buried under non-aggressive soil/ground water, completely immersed in sea water25-7530Very SevereConcrete surfaces exposed to sea water spray,corrossive fumes or severe freezing conditions whilst wet75-10020ExtremeConcrete surfaces exposed to abrasive action ,for example machinery, metal tyred vehicles or water carrying solidsTable-7: Value of Statistical Constant 't' ( IS:10262-1982)Concrete surfaces in tidal zoneAccepted proportion of low results't' Members in direct contact with liquid /solid aggressive chemicals1 in 50.841 in 101.281 in 151.5Table-6:Gradings limit for Fine Aggregate (IS:383-1970)1 in 201.65IS SievePercentage passing for 1 in 401.96Zone-1Zone-2Zone-3Zone-41 in 1002.3310-mm1001001001004.75-mm90-10090-10090-10095-1002.36-mm60-9575-10085-10095-1001.18-mm30-7055-9075-10090-100600-micron15-3435-5960-7980-100300-micron5-20389591494615-50150-micron0-100-100-100-15Table-8:Degree of QulityControl expectedVery GoodFresh cement from single source and regular tests, weigh batching of all materilas,aggregates supplied in single sizes, control of aggregate grading and moisture content, Control of water added, frequent supervision, regular workability and strength tests, and field laboratory facilities Good Carefully stored cement and periodic tests, weigh batching of all materials, controlled water, graded aggregate supplied,ocassional grading and moisture tests, periodic check of workability and strength, intermittent supervision and experienced workersFairProper storage of Cement, Volume batching of all aggregates allowing to bulking of sand, weigh batching of cement, water content controlled by inspection of mix, and occasional supervision and tests.Table-9: Recommended value of Standard Deviation IS:10262-1982Grade of ConcreteDegree of Quality ControlVery good Good FairM-102.02.33.3M-152.53.54.5M-203.64.65.6M-254.35.06.3M-305.06.07.0M-355.36.37.3M-405.66.67.6M-456.07.08.0M-506.47.48.4M-556.71.78.7M-606.87.88.8
BETTER BY DESIGNdesignied to a better surface
WorksheetWORKSHEET FOR CONCRETE MIXES DESIGNPROJECT:Const. of Br. No 1/1 for PMGSY Project on road no-1JOB LOC.Abutment no-1 on Silchar side apporoach road.Conc. Grade M-25Date:3/12/07
I.REQUIREMENTS/PARAMETERS:A.SPECIFIED MINIMUM STRENGTH(Fck )
kg/cm2300.0B.DURABILITY REQUREMENTSExposureSEVERE
: :Refer TABLE-3 (Input Data Table)
Maximum w/c ratio0.45
: Ref: TABLE-1Minimum cement content335.0
: : refer table-1 & 2Minimum Grade of ConcreteM25
: :refer table-1C.CEMENT(TYPE
/GRADE)Type/GradeOPC/53GCharacteristic Strength kg/cm2530.0Cement
Grade E
: :(from fig-A,Note)D.WORKABILITY OR SLUMP (mm)70DEGREE OF
WORKABILITY HIGH
: Choose Slump range & Placing condition & then degree of
workabilty from Table-4E. DETAILS OF FINE AGREGATE Type
(Natural/Mixed)Natural
: :From Sieve analysis report ( SA-3)% passing 600 micron sieve 25%
oversize19% passing 600 micron sieve *(pure sand)31%
: : correct for pure sand if oversize present in sand &
vice-versa. Refer SA-3 (Sieve Analysis) Select Zone I
: : refer Table-6%retained on 4.75mm IS Sieve 19%Specific
Gravity2.96Dry Loose Bulk Density (kg/lit)1.77Bulkage 15%
: : Determine bulkage of natural moist sand & S/moistureSurface
Moisture2%F.DETAILS OF COARSE AGGREGATE Type Crushed% Passing 20mm
Sieve (CA-II)43%
: : Refer Sieve analysis for larger size agg.(CA-II)Maximum size of
aggregate(MSA) (mm)30
: : Refer Table-5%Passing On 4.75mm Sieve (CA-I)9%Specific
Gravity2.53Dry Loose Bulk Density(DLBD)-CAI kg/cm21.44Dry Loose
Bulk Density(DLBD)-CAII kg/cm21.39II.TARGET MEAN STRENGTH (Fck)
kg/cm2Degree of Quality ControlGood
: : TABLE-8Standard Deviation S ( N/mm2 )6.00
: : TABLE-9Value Selected1.65
: : TABLE-7
Target Mean Strength (N/mm2)40III.WATER TO CEMENT RATIO W/C
Ratio (Figure-A)0.425 W/C Ratio ( For Durability)0.45W/C Ratio
(Selected)0.43
: : Lower value selectedIV.PROPORTION OF FINE AGGREGATE Maximum
Size Of Aggregate(MSA) 30.00Slump70.00W/C selected0.43%Passing 600
Mic. IS Sieve 31%Proportion Of Fine AggregateV.PROPORTION OF COARSE
AGGREGATE VI.CORRECTIONS IN AGGREGATE PROPOTION A.Corrections due
to coarse aggregates in fine aggregate :% Passing 4.75mm Sieve %
Proportion of Fine Aggregate after correction% Proportion of Coarse
aggregate after correction.B.Corrections due to fine aggregates in
coarse aggregates: % passing 4.75mm sieve % proportion of fine
aggregate after correctionc) % proportion of coarse aggregates
after correctionsVII.AGGREGATE TO CEMENT RATIO (A/C):A.INPUT for
A/C determination:Maximum size of aggregate(MSA)Type Of Aggregates
FINE -- CA-I -- CA-II W/C ratio selected workability/slumpGrading
curve no/zoneB.A/C RATIO for fine aggregate for coarse aggregate
C.AGGREGATE PROPORTIONa.for fine aggregate b.for coarse aggregate
D.A/C PROPORTIONATELY WORK OUTa.for fine aggregate b.for coarse
aggregate TOTAL=(a. + b.)E.A/C CORRECTED FOR SP.GRAVITYa.for fine
aggregate b.for coarse aggregate TOTAL=(a. + b.)F.A/C CORRECTED FOR
FLAKINESS`G.A/C FINALVIII.WEIGH BATCHING:A.CEMENT (50 KG)B.WATER
=(50KG * W/C) C.FA = [ 50KG * A/C (FINAL) * % PROPORTION ] D.CA-I =
[ 50KG * A/C (FINAL) * % PROPORTION.]E.CA-II = [ 50KG * A/C(FINAL)
* % PROPORTION.]IX.VOLUMETRIC BATCHING:A.CEMENT (50
KG)B.WATER=(50KG * W/C) C.WATER AFTER CORRECTIOND.DLBD for FAE.DLBD
- for CA-IF.DLBD for CA-IIG.FINE AGGREGATE H.BULKAGE OF FINE
AGG.I.FINE AGG. AFTER BULKAGE J.COARSE AGGREGATE CA-IK.COASE
AGGREGATE- CA-II
Design mixTrial MixCementW/CBulkageS/MoistureFACA-ICA-IIWaterSlumpI.CONCRETE POST MORTEMA.Average wt. of 15cm Concrete Cubes in Kg8B.Concrete Density in Kg/Cu.m2400C.W/C selected0.45D.A/C Final5.25E.Total Constituents7F.Cement Content (Kg)358
Result SheetMix No-IIIRemarks of the ResultConc. GradeNo. of CubesDate of CastingDate of testing7 Day strengtha) Cube Weightb)Loadc) Comp. Strength28 Day strengtha) Cube Weightb)Loadc) Comp. Strength
Quality shall be the pride of CIVIL ENGINEER
%FA CurveRECOMMENDED PROPORTION OF FINE AGGEREGATE FOR % PASSING 600 MICRON IS SIEVE RECOMMENDED PROPORTION OF FINE AGGEREGATE FOR % PASSING 600 MICRON IS SIEVE ( As per DOE,UK method)( As per DOE,UK method)MAS=10mmSlump=(0 mm -10mm)MAS=10mmSlump=(10 mm-30mm)Free W/C ratio% Prop. of FA for % passing 600 mic. IS-SieveFree W/C ratio% Prop. of FA for % passing 600 mic. IS-Sieve100%80%60%40%15%% of FA passing 600 mic. IS Sieve100%80%60%40%15%% of FA passing 600 mic. IS Sieve0.324.0028.0033.5042.0051.50Proportion of FA for the design mix w.r.to % of FA passing 600 mic. IS Sieve & W/C ratio0.326.0029.5035.00Proportion of FA for the design mix w.r.to % of FA passing 600 mic. IS Sieve & W/C ratio0.425.3329.5035.2544.1754.250.427.0031.0037.000.526.6731.0037.0046.3357.000.528.5032.5039.000.628.0032.5038.7548.5059.750.629.5034.0040.300.729.3334.0040.5050.6762.500.730.5035.0042.000.830.6735.5042.2552.8365.250.832.0036.5044.000.932.0037.0044.0055.0068.000.933.0038.0046.000.4526.0030.2536.1345.2555.63See note below0.4526.0030.2536.1345.2555.63See note below
A-C ratioAggregate /Cement ratio by weightDegree of workabilityVery lowLowMediumHighGrading number1234123412341234W/C ratio by weight0.405.654.23.20.457.26.44.10.507.84.90.550.600.650.700.750.80
SASA-1Aggregate Field Test Observatuion Sheet. (Sample-I)SA-4Aggregate Field Test Observatuion Sheet. (Sample-II)
1.JOB:LAB Trials1.JOB:LAB Trials2.TYPE:Crushed CA-II
2.TYPE:Natural River Gravel, (Rounded + Irregular)3.PHYSICAL
INSPECTION:Sieve Analysis
: : SEE NOTE BELOW3.PHYSICAL INSPECTION:Sieve Analysis4.SAMPLE WT.
TAKEN (Natural state ):4700gm4.SAMPLE WT. TAKEN (Natural state
):2985gm5.DRY LOOSE BULK DENSITY:1.39Kg/lit5.DRY LOOSE BULK
DENSITY:1.67Kg/lit6.SOURCE:Gumrah quarry6.SOURCE:Gumrah
quarry7.SPECIFIC GRAVITY:2.53
: GREEN TABS ARE FOR INPUT DATA 7.SPECIFIC GRAVITY:2.53
IS SieveRetained on each SieveCumulative Percentage
RetainedPassing throughRemarksIS SieveRetained on each
SieveCumulative Percentage RetainedPassing
throughRemarksWT%WT%WT%WT%40 mm0004700100MAS:30
: : Refer for MAS in Table no-5 of Input Data Tables workshhet.40
mm0002985100MAS:20
: : Refer for MAS in Table no-5 of Input Data Tables workshhet./The
sample conforms to the grading for 20mm nominal max. size for
graded agg.20mm26705757203043(25-75)%20mm18066280594(75-100)%10
mm2030431000010 mm19856673820274.75 mm4.75 mm79026993012.36 mm2.36
mm1.18 mm1.18 mm600 micron600 micron300 micron300 micron150
micron150 micronpassing 150 micronpassing 150 micronWt. of sample
(total)4700100Wt. of sample (total)216572.5293132328
8.FINENESS MODULUS:-------8.FINENESS MODULUS:-------9.SILT CONTENT BY VOLUME :NA % at 3 hrs/2hrs/10min9.SILT CONTENT BY VOLUME :NA % at 3 hrs/2hrs/10minBY WEIGHT:NA % by wt.BY WEIGHT:NA % by wt.10.S.MOISTURE10.S.MOISTURE11.ABSORPTION11.ABSORPTION12.DATE OF TESTING:7/13/0312.DATE OF TESTING:7/13/0313.TESTED BY:MR. K.B.S13.TESTED BY:MR. K.B.S14.REMARKS:Accepted/acceptable subject to washing & / or sieving/rejected14.REMARKS:Accepted/acceptable subject to washing & / or sieving/rejected
LAB INCHARGELAB ENGINEERLAB INCHARGELAB ENGINEERSA-2Aggregate Field Test Observatuion Sheet. (Sample-I)SA-3Aggregate Field Test Observatuion Sheet. (Sample-I)
1.JOB:LAB Trials1.JOB:LAB Trials2.TYPE:Crushed CA-I 2.TYPE:River Sand (FA)3.PHYSICAL INSPECTION:Sieve Analysis3.PHYSICAL INSPECTION:Sieve Analysis4.SAMPLE WT. TAKEN (Natural state ):4835gm4.SAMPLE WT. TAKEN (Natural state ):1000gm5.DRY LOOSE BULK DENSITY:1.44Kg/lit5.DRY LOOSE BULK DENSITY:1.77Kg/lit6.SOURCE:Gumrah quarry6.SOURCE:Vaitarna (Mumbai)7.SPECIFIC GRAVITY:2.537.SPECIFIC GRAVITY:2.96
IS SieveRetained on each SieveCumulative Percentage RetainedPassing throughRemarksIS SieveRetained on each SieveCumulative Percentage RetainedPassing throughRemarksWT%WT%WT%WT%40 mm000483510040 mm000100010020mm000483510020mm000100010010 mm2665555521704510 mm5566945954.75 mm173536914359Fines present4.75 mm13714198088119% over size2.36 mm4359100002.36 mm1121130696701.18 mm1.18 mm218225247848600 micron600 micron23023752482531%* Zone-I300 micron300 micron1701792788150 micron150 micron68799101passing 150 micronpassing 150 micron101Wt. of sample (total)4835100Wt. of sample (total)10001003748.FINENESS MODULUS:-------8.FINENESS MODULUS:3.749.SILT CONTENT BY VOLUME :NA % at 3 hrs/2hrs/10min9.SILT CONTENT BY VOLUME :5 % at 3 hrs/2hrs/10minBY WEIGHT:NA % by wt.BY WEIGHT:---- % by wt.10.S.MOISTURE:10.S.MOISTURE11.ABSORPTION:11.ABSORPTION12.DATE OF TESTING:7/13/0312.DATE OF TESTING:7/13/0313.TESTED BY:MR. K.B.S13.TESTED BY:MR. K.B.S14.REMARKS:Accepted/acceptable subject to washing & / or sieving/rejected14.REMARKS:Accepted/acceptable subject to washing & / or sieving/rejectedLAB INCHARGELAB ENGINEERLAB INCHARGELAB ENGINEERNote:Mix Design for a particular grade can be designed with two type of coarse aggregate (Single sized CA-I, CA-II) or one type with graded aggregate.The Sieve Analaysis under Sr.No-SA-1 & SA-2 are for coarse aggregate of 30 mm & 15mm nominal single sized respectively.However 20 mm & 10 mm nominal single-sized aggregate or graded aggregate of 20mm nominal size (Sr.No-SA-4) instead can be used. In each case above the % passing for a particular IS SIEVE should conform the prescribed grading limit of IS Code. For fine aggregate with higher finer fines and low FM values, suitable proportion of Crusher (Grit + dust ) can be used with trials to increase FM value. The above effort for making design mix (normal) is a guide only and hence user should take every care to do all related test of aggregate as per IS-codes & go for trials and ascertain the target strength achieved before actual use.
WC CURVE
pc
0.33534.3539.2544.1549.0553.9558.850.63512.514.516.51819.522
