### Quantity of Cement and Sand Calculation in Mortar

For the calculation of cement mortar, let us assume that we use 1m 3 of cement mortar. Procedure for calculation is: 1. Calculate the dry volume of materials required for 1m 3 cement mortar. Considering voids in sands, we assume that materials consists of 60% voids. That is, for 1m 3 of wet cement mortar, 1.6m 3 of materials are required.