Practice shows that the fat cement mortar of the composition is 1: 2 and 1: 2.5, as well as fatty concrete with careful work, with a coiner selection of the granulometric composition and with proper dosage of water can be quite waterproof. When using liquid concrete, the water resistance is more obtained than with half -dry concrete, since concrete hardening in the presence of a sufficient amount of moisture is always less waterproof than concrete in the air that accelerates the evaporation of water from concrete. However, greater water resistance in this case is achieved to the detriment of strength. Concrete resistance to penetration of water through it can be increased by the additives of clay, fat lime or track to it.
