Answer / k.prakashchandra

volumetric proportions for M20-1:1.5:3 and M25 -1:1:2

Answer / n3

for nominal mix like M10,M15,M20,M25 the proportion of cement ,sand & agg is fixed as posted above.but for rich mix like M30,M35... the proportion is requred to be design by various method like IS method by using chart,table etc.

Answer / kanchan

M20=1:1.5:3,
1cum concrete with water= 1.57cum dry material
For Cement- 1/(1+1.5+3)*1.57=0.285cum=8.55bags
For Sand- 1.5/(1+1.5+3)*1.57=0.43cum
For Aggregate -3/(1+1.5+3)*1.57=0.86cum

M25 -1:1:2
For Cement- 1/(1+1+2)*1.57=0.39cum=11.77bags
For Sand- 1/(1+1+2)*1.57=0.39cum
For Aggregate -2/(1+1+2)*1.57=0.78cum

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