1. Add cement to the sand called "cement mortar." Cement mortar is made by mixing and stirring concrete and sand in a certain proportion. It can be used to prepare mortar with higher strength. Cement mortar is generally used in foundations, long-term water-soaked basements, and masonry that withstands large external forces.
2. Add lime (paste) called "white mortar" or "lime mortar". Lime mortar is a mortar made by stirring lime paste and sand in a certain proportion, and it is entirely based on the hard gas of lime to obtain strength.
3. Add cement, add white ash, called "mixed mortar."