Question
How to calculate the volume of sand , aggregate and cement in 1m^3 of concrete? Take M-20 concrete
Answer
Example M-20 mix design (1:2:3) if we are given 1 m^3 concrete
First we add up 1+2+3=6
Means
1 cement
2 sand
3 aggregate
To calculate the the volume of sand
1 * 2/6= 2/6 m^3 =0.33m^3
To calculate the volume of aggregate (gravel)
1 * 3/6 = 0.5m^3
To calculate the volume of cement
1 * 1/6 = 0.167m^3
To calculate cement in piece
1 bag of cement is 0.036m^3 so divide the quantity of cement with a bag of cement
Bag of cement = 0.167 / 0.036 = 4.6
So we use 5 bag of cement
We consider dry volume not wet volume
To convert dry volume to wet volume we multiply it by 1.54
Wet volume =1.54 dry volume
10% shrinkage
44% wastage
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| Question-Answer civil engineering study |
