Answer / muhammad azam

for example concrete ratio 1:2:4
volume or dry conrete=1.54
sum of ratio=1+2+4=7
cement=1/7 *1.54=0.219
sand=2/7 *1.54=0.439
aggregate=4/7*1.54=0.879

Answer / manzar

For example M15=1:2:4
Sum of ratio=1+2+4=7
Consider volume=2 cu.m wet volume
Dray volume=wet volume+54%wet volume=2+54/100*2=3.08 cubic meter
Cement=3.08*1/7*1440=633.3kg
Sand=3.08*2/7*35.31=31.07 cft
Aggregate=3.08*4/7*35.31=62.14cft

Answer / naresh babu

for example M15 = 1:2:4
volume of wet cement concrete =1.54 to1.57m^3
so cement =1/1.57=0.63
sand= 2/1.57=1.27
concrete =4/1.57=2.54

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