Cement Mortar

This  is prepared by mixing cement and sand, with or without pozzolona, in the specified proportions. Cement bag weighing 50 kg should be taken as 0.035 cu.m. 

The mixing of mortar should be done in mechanical mixers operated by power or manually as decided by Engineer-in-Charge. Cement and sand should be mixed dry thoroughly. Water should then be added gradually and wet mixing continued for at least three minutes till workable consistency is obtained. Mortar should be used as soon as possible after mixing and before it begins to set, preferably  within half an hour.