How to Calculate Cement Sand Quantity for Plastering To calculate the cement and sand for 100 m 2 plastering area in 1 6 ratio and 12 mm thickness **-how much cement sand and crushed required for 100 cft-**,Quantities of Materials Per Cubic Meter of Concrete Mix 2 The table is based on assumption that the voids in sand and crushed stone are 40 and 45 percent respectively 3 Air content of 1 percent has been assumed 4 For gravel aggregates decrease cement by 5 percent increase sand by 2 percent and coarse aggregate in proportion to fine aggregate in mix …… **Get More**