To safeguard concrete from damage for the duration of freezing, bubbles needs to have the proper measurement, distribution and quantity. ASTM C 260 specifies specifications for air entraining admixtures. Silica fume enhances concrete in two ways The fundamental pozzolanic reaction, and also a microfiller outcome. Addition of silica fume improves https://www.tjcyindustrialchem.com/news/cement-additives-and-concrete-admixtures-key-differences.html