In the process of the alkali activates fly ash to produce the cementitious materials,the aluminosilicate gel plays a cementitious role,it is produced during the course of alkali reacts with fly ash.

• 碱激发粉煤灰产生胶凝材料的过程中起胶凝作用的是硅铝酸凝胶,它是碱与粉煤灰中的硅、铝质反应时产生的。