To safeguard concrete from injury through freezing, bubbles have to have the proper dimension, distribution and volume. ASTM C 260 specifies necessities for air entraining admixtures. Concrete admixtures are normal or produced chemicals or additives additional all through concrete mixing to boost precise properties with the clean or hardened concrete, https://www.tjcyindustrialchem.com/news/cement-additives-and-concrete-admixtures-key-differences.html