How to calculate the volume of sand , aggregate and cement in 1m^3 of concrete? Take M-20 concrete : Question-Answer

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

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