Answer / mohanraj

Gererally it is vary from ratio to ratio. For example C.C
1:2:4 for 20mm gravel. First we add all the ratios ie.,
1+2+4=7.then we divide individual ratio by total ratio and
multiply 1.57m3. Cement=1*1.57/7=.224m3.Sand =
2*1.57/7=.45m3 20mm gravel= 4*1.57/7=.90m3.For 40mm gravel
multiply with 1.52m3.

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