AgencyPPC
Though volcanic ash is the first form of pozzuolana used, this now includes natural and artificial siliceous or siliceous, aluminous materials such as clay, slag, silica fume, fly ash, and…
Though volcanic ash is the first form of pozzuolana used, this now includes natural and artificial siliceous or siliceous, aluminous materials such as clay, slag, silica fume, fly ash, and…