ACI Method of Mix Design (Civilax.com)
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Transcript of ACI Method of Mix Design (Civilax.com)
Non Air EntrainedACI Mix Design (NAE) by WeightINPUT CALCULATED VALUES
Required Strength (Psi) =4000Required Slump, in =4Given Slump, (in) =3Selected Slump, in =3Type of Structure =BeamsAmount of water, (lb/yd3) =340Table 3.2 (NAE)Max Size of Aggregate, (in) =0.75W/C Ratio =0.57Table 3.3 ( NAE & EA )Fineness Modulus of Sand =2.6Amount of Cement, (lb/yd3) =596.5Coarse Aggregate weight, (lb/yd3) =2700Volume of Coarse Aggreagte, (yd3) =0.64Table 3.4Moisture Absorbtion For Coarse Aggregates, (%) = 3Weight of Coarse Aggregate, (lb/yd3) =2700Moisture Absorbtion For Fine Aggregates, (%) = 2Estimated Weight Of fresh Concrete, (lb) =3960Table 3.5 ( NAE & EA )Availble Moisture in Fine Aggregates, (%) = 1.02Weight of Fine Aggregate, (lb) =1295Availble Moisture in Coarse Aggregates, (%) = 1.03Net Weight of Fine Aggregate, (lb) =1321.41Net Weight of Coarse Aggregate, (lb) =1779.84Net Weight of Water, (lb) =417.75
ResultsFor One Yd3 of Concrete :CementFine AggregateCoarseAggregateAmount of Cement =596.5lbRatio .12.222.98Amount of Fine Aggregate =1321.41lbAmount of Coarse Aggregate =1779.84lbW/C Ratio .0.57Amount of Water =417.75lbTRIAL MIX
Material Testing Lab CECOS University
Air EntrainedACI Mix Design (AE) by WeightINPUT CALCULATED VALUES
Required Strength (Psi) =3000PsiRequired Slump, in =4Given Slump, (in) =4Selected Slump, in =4Type of Structure =BeamsAmount of water, (lb/yd3) =295Table 3.2 (AE)Max Size of Aggregate, (in) =1inW/C Ratio =0.59Table 3.3 ( NAE & EA )Fineness Modulus of Sand =2.5Amount of Cement, (lb/yd3) =500Coarse Aggregate weight, (lb/yd3) =2700lb/yd3Volume of Coarse Aggreagte, (yd3) =0.7Table 3.4Moisture Absorbtion For Coarse Aggregates, (%) = 2%Weight of Coarse Aggregate, (lb/yd3) =1890Moisture Absorbtion For Fine Aggregates, (%) = 1%Estimated Weight Of fresh Concrete, (lb) =3900Table 3.5 ( NAE & EA )Availble Moisture in Fine Aggregates, (%) = 2%Weight of Fine Aggregate, (lb) =1334.5Availble Moisture in Coarse Aggregates, (%) = 0%Net Weight of Fine Aggregate, (lb) =1347.845Exposure type =Moderate ExposureNet Weight of Coarse Aggregate, (lb) =1927.8Net Weight of Water, (lb) =270.545
ResultsFor One Yd3 of Concrete :CementFine AggregateCoarseAggregateAmount of Cement =500lbRatio .12.73.9Amount of Fine Aggregate =1347.845lbAmount of Coarse Aggregate =1927.8lbW/C Ratio .0.54Amount of Water =270.545lbTRIAL MIX
Material Testing Lab University of Engg. & Technology Peshawar
Table 3.1Table 3.1 Recommended Slumps For Various Types of Construction
Type of ConstructionSlump (in)MaxMinReinforced Footings31Plain Footings31Beams41Building Columns41Pavement and Slab31Mass Concrete21
Table 3.2 ( NAE )Table 3.2 Approximate Mixing Water and Air Content Requirements for Different Slumps and Nominal Maximum Sizes of Aggregates]
Water (Ib/yd3 of concrete for indicated nominal maximum sizes of aggregate)Non Air Entrained ConcreteSlump (in)Max Size of Aggregate, in0.3750.500.751.001.502.003.006.0013503353153002752602201902350335315300275260220190338536534032530028524521043853653403253002852452106410385360340315300270--------7410385360340315300270--------Amount of Entrapped Air(%)32.521.510.50.30.2
Moisture Content % =2
Table 3.2 ( AE )Table 3.2 Approximate Mixing Water and Air Content Requirements for Different Slumps and Nominal Maximum Sizes of Aggregates]
Water (Ib/yd3 of concrete for indicated nominal maximum sizes of aggregate) Air Entrained ConcreteSlump(in)Max Size of Aggregate, in0.3750.500.751.001.502.003.006.0013052952802702502402051802305295280270250240205180334032530529527526522520043403253052952752652252006365345325310290280260-----7365345325310290280260-----
(Air Content %)0.3750.500.751.001.502.003.006.00Mild Exposure4.543.532.521.51Moderate Exposure65.554.54.543.53Extreme Exposure7.57665.554.54
Air Content % used =4.5
Table 3.3 ( NAE & AE )Table 3.3 Relationship Between Water/Cement Ratio and Compressive Strength of Concrete
CompressiveStrengh At 28 days (psi)Water/Cement Ratio by WeightNonair-entrained Concrete Air-entrained Concrete60000.410.3250000.480.440000.570.4830000.680.5920000.820.74
Table 3.4Table 3.4 Volume of Coarse Aggregate per Unit of Volume of Concrete
Max Size of Aggregate, inFinness Modulus of Sand2.402.502.602.702.802.903.003.100.3750.50.490.480.470.460.450.440.430.500.590.580.570.560.550.540.530.520.750.660.650.640.630.620.610.60.591.000.710.70.690.680.670.660.650.641.500.750.740.730.720.710.70.690.682.000.780.770.760.750.740.730.720.713.000.820.810.80.790.780.770.760.756.000.870.860.850.840.830.820.810.8
Table 3.5 ( NAE & EA )Table 3.5 First Estimate of Weight of Fresh Concrete (lb/yd3)
Max Size of Aggregate, in Nonair-entrained Concrete Air-entrained Concrete
0.375384436900.50389037600.75396038401.00401039001.50407039602.00412040003.00416040406.0042304120