how we calculate of Sand, cement and aggregate of M20 ...
All Answers ( 21) M20 (1 cement : sand :3 stone/brick aggregate). To determine the proportions you have to perform mix design, for this you have to find out the of cement, CA, FA, and water cement ratio, type of exposure, Maximum size of aggregate etc. Once the W/C ratio is determined use 186 kg water (for 20mm CA) to find out the qty.