Mortars made of cement, fine aggregate, water, lime, active admixture or additives added as needed are divided into cement mortar and cement mixed mortar.

Generally speaking, 1:3 cement mortar is composed of 1 cement and 3 sand, but the composition of water is actually ignored, which is generally about 0.6, that is, it should be 1:3:0.6, and the density of cement mortar is 2000Kg/m3.