Say if you need 100 cft volume for a structural member with 1:2:4 mix (M20) can be made with 1:2:4 mix ratio or 1:1.5:3 mix ratio.

Remember that for 100 cft wet concrete you need 154 cft dry ingredients of cement sand and crush.

quantity of green concrete required = 154 cft (100*1.54)

Quantity of cement = 154*1/7 = 22 cft

where (7=1+2+4 according to mix ratio required for 1:2:4 concrete)

Quantity of sand = 154*2/7= 44cft

Quantity of crush = 154*4/7= 88 cft

REHAN SAJID

SENIOR EXECUTIVE

Pakistan State Oil Company

92-300-6341946