To calculate quantity of cement you should know the following parameter. mix ratio of m25; Formula for cement quantity; Relationship between the dry volume of concrete and wet volume (i.e., How much volume will increase when we convert wet volume into dry volume); Conversation of units. Lets see Detailed calculation. read more
M25 mix has a ratio of 1 cement to 1 sand and 2 stone jelly.i.e 1:1:2. This means cement volume is half of stone jelly volume.To prepare 1cu.m of concrete we need 0.0 cu.m of jelly. So we need 0.9/2= 0.45 cu.m of sand. So weight of cement required = 0.45x1440 =648 kg of cement.approximately 13 bags. read more