To shield concrete from problems during freezing, bubbles must have the appropriate size, distribution and quantity. ASTM C 260 specifies prerequisites for air entraining admixtures. Curing also has an effect on cracking. In slabs, the highest tends to dry out first and shrinks while the lower sections nonetheless have a https://www.tjcyindustrialchem.com/news/cement-additives-and-concrete-admixtures-key-differences.html