Calcium Nitrate for construction work - At this dosage, calcium nitrite also acts as a setting and hardening accelerator. In the case of repair works where a layer of about 100 mm. 

The effect of calcium nitrate on compressive strength is that it increases the very early strength (e.g. 8 h) due to more maturity caused by earlier strength, about equal 1 day strength, but higher long term strength. The latter effect is probably due to the formation of nitrate-AFm, C3A·Ca(NO3)2·10H2O, and the stabilisation of ettringite leading to more bound water, less porosity and thereby higher strength.