HOW TO CALCULATE INGREDIENTS OF RCC

For an Example,
Let us consider grade of concrete as M15 (Mix 1:2:4)
Let,
Quantity of concrete – 1 m3
Normally we consider 90% of coarse aggregate in total quantity of concrete, Hence
20mm coarse aggregate – 0.90 m3
Fine aggregate = 0.90 m3 x 2/4 à (2 part of fine aggregate / 4 part of coarse aggregate)
= 0.45 m3
Cement = 0.45 m3 x ½ à (1 part of cement / 2 part fine aggregate)
= 0.225m3
= 0.225 x 1440 kg/m3
= 324 kg
Note: 1440 kg is the density of cement