Project on Concrete Mix Design for various grades of Concrete

1. Concrete Mix Design For M35 Grade Concrete With Fly Ash:-

• Grade of Concrete - M 35
• Cement Type -OPC 43 Confirming IS 8112
• Type of Mineral- Fly Ash Confirming IS 3812
• Size of Aggregate-20mm
• Minimum Cement Content -340 Kg/m^3 ( Is 456-2000) Exposure Condition.
• Water Cement Ratio 0.45 Is 456-2000 ( Exposure Condition )
• Workability-100 mm ( Slump Value Pumpable Concrete )
• Exposure Condition ( Very Serve For RCC )
• Method of Concrete Placing-Pumping
• Degree of Supervision-Good
• Type of Aggregate-Crushed Angular Aggregate
• Maximum Cement Content -450Kg/m^3
• Chemical Admixture-Super Plasticizer
• Test Data For Materials
• Specific Gravity of Cement -3.15 Kg/m^3
• Specific Gravity of Fly Ash -2.2 Kg/m^3 (IS 3812 Part -1)
• Specific Gravity of Coarse Aggregate - 2.74
• Specific Gravity of Fine Aggregate -2.74
• Water Absorption Coarse Aggregate -0.5 %
• Water Absorption Fine Aggregate -1.0%
• Target Strength - F'CK=FCK+1.65S
• FCK = 35 N/mm^2
• S=5.0
• F'CK = 35+1.65*5.0
• F'CK =43.25 N/mm^2
• Selection of Water Cement Ratio
• IS 456:2000-0.45
• From Table -2, 10262-2009, 186 Liters (25-50) Slump For Additional Slump 3% May be Added for Every 25 mm Slump
• Estimated Water Content For 100 mm Slump
• =186+0.06*186
• =197 Liters
• Super Plasticizers Used Water Content Reduced Up to 20% above
• Reduction 29%
• 197*0.71=140 Liters
• Cement Content = 140/0.4=350 Kg/m^3 (10% Fly Ash)
• Cementenious Material Content = 350*1.10
• =385 Kg/m^3
• Water Content =140 Kg/m^3
• Water Cement Ratio = 140/385
• =0.364
• Fly Ash @30% Cementinious Material Content =385*30%=115 Kg.m^3
• Cement =385-115=270 Kg.m^3
• Proportion of Volume of Fine & Coarse 20 mm Size is 0.62 , From Table IS 10262:2009
• Pumpable Concrete Reduced 10%
• Volume of Coarse Aggergate=0.62*0.9=0.56
• Volume of Fine Aggregate = 1-0.56=0.44
• (a)Voume of Cement = Mass of Cement /Specific Gravity of Cement *1/1000
• =(270/3.15)*(1/1000)
• =0.085 Kg/m^3
• (b)Volume of Fly Ash= Mass of Fly Ash/Specific Gravity of Fly Ash*1/1000
• =(115/2.2)*(1/1000)
• 0.052 Kg/m^3
• (c)Volume of Water = Mass of Water / Specifi Gravity of Water *1/1000
• =(140/1)*(1/1000)
• =0.140
• (d)Volume of Chemical Admixture = Mass of Chemical Admixture / Specific Gravity of Chemical Admixture *1/1000
• =(7.6/1.145)*(1/1000)
• =0.006
• (e)Volume of Aggregate = (1-(a+b+c+d))
• =(1-(0.085+0.052+0.140+0.006))
• =0.717
• (f) Mass of Coarse Aggregate=e*Volume of Coarse Aggregate*Specific Gravity of Coarse Aggregate*1000
• 0.717*0.56*2.74*1000
• 1100.16 Kg/m^3
• (g) Mass of Fine Aggregate = e*Volume of FIne Aggregate* Specific Gravity of Fine Aggregate *1000
• =0.717*0.44*2.74*1000
• 864.41 Kg/m^3
• Trial.
• Cement=270 Kg/m^3
• Fly Ash = 115 Kg.m^3
• Water = 140
• Fine Aggregate=864.41
• Coarse Aggregate=1100.16
• Chemical Admixture =7
• Water Cement Ratio =0.4
• 1:2.85:2.24

Mix Design for M50 Grade Concrete:-

• Grade of Concrete = M50
• Size of Aggregate = 20mm Size
• Workability = 100mm ( Pumpable Concrete)
• Exposure Condition= Severve
• Chemical Admixture- Super Plasticizers
• Type of Aggergate = Crushed Angular Aggregate
• Method of Concrete Placing= Pumping
• Minimum Cement Content=320 Kg.m^3
• Target Mean Strength = F'CK=FCK+1.65*S
• =50+1.65*5.0
• =58.25 N/mm^2
• Selection of Water Cement Ratio
• 0.45 From Table-5, IS 456:2000 Depends on Exposure Condition
• Selection of Water Content
• The Maximum Water Content For 25mm to 50 mm Slump =186 Liters
• Additional 3% may be added for Every 25 mm Slump
• 186+(6/100*186)
• 197 Liters
• Super Plasticizers used water Content Reduced up to 20% above, Reduction 29%
• 197/0.71=140 Liters
• Cement Content
• =W/Wc
• 140/0.4
• =350 Kg.m^3
• Proportion of Volume of Fine & Coarse Aggregate 20mm size From Table Is 10262:2009
• Pumpable Concrete Values Reduced 10%
• Volume of Coarse Aggregare =0.62*0.9=0.56
• Volume of Fine Aggregate =1-.0.56=0.44
• (a) Volume of Cement =Mass of Cement / Specific Gravity of Cement *1/1000
• =(350/3.515)*(1/1000)
• 0.111 Kg/m^3
• (b) Volume of Water = Mass of Water / Specific Gravity of Water *1/1000
• =(140/1)*(1/1000)
• =0.140
• (C) Volume of plastisizers =Mass of Plasticizer /Specific Gravity of Plasicizer *1/1000
• =(7.6/1.145)*(1/1000)
• =0.0006
• (e)Volume of Aggregate=(1-(a+b+c))
• =(1-(0.111+0.140+0.0006)
• 0.743
• (f) Mass of Coarse Aggregate= e*Volume of Coarse Aggregate* Specific Gravity of Coarse Aggregate*1000
• =0.743*0.56*2.74*1000
• 1140 Kg.m^3
• Mass of Fine Aggregate =e*Volume of Fine Aggregate *Specific Gravity of Fine Aggregate*1000
• =0.743*0.44*2.74*1000
• 896 Kg/m^3
• Trail.
• Cement =350 Kg/m^3
• Water =140 Kg/m^3
• Fine Aggregate = 896 Kg/m^3
• Coarse Aggregate=1140 Kg/m^3
• Chemical Admixture =7 Kg/m^3
• Water Cement Ratio =0.4
• 1:2.56:3.25