Experimental study on the activators of fly ash

By the experiments of fly ash mortar,the activating effect of five activators of fly ash(Na2SO4,Ca(OH)2,Na2SiO3,CaSO4,the mixture of Na2SO4 and Ca(OH)2) was compared and the impact of low-calcium fly ash and high-calcium fly ash on the mechanical properties of fly ash mortar was also analyzed.For a high volume fly ash part,in order to improve its early strength,high-calcium fly ash should be chosen and CaSO4 or the mixture of Na2SO4 and Ca(OH)2 should be selected as the activator.