水玻璃硬化的认识过程

传统观点认为水玻璃化学硬化的机理是水玻璃在酸作用下析出游离酸，硅酸失水缩聚生成硅溶胶，硅溶胶构成了水玻璃硬化后的全部粘结强度，经过认识的不断深入，作者认为，水玻璃的浓度－模数超过临界值便趋固化，再失去部分水分即导致硬化，硬化的水玻璃实际上是失水的高模数水模离，不可能有硅凝胶生成。

THE PROGRESS TO RECOGNIZE THE HARDENING MECHANISM OF WATERGLASS

The traditional conception of recoginizing the hardening mechanism of waterglass is that the silicic acid is splited out under the reaction with acid and then the silicic acid is dehydrated to form silica gel.The binding strength of hardened waterglass depends on the formation of silica gel.An entirely new theory established is that the hardened waterglass is merely a partially dehydrated waterglass with higher modulus.The waterglass is tending to solidify over the critical value of concentration-modulus and is tending to harden after partial dehydration.There is no possibility to form silica gel in the hardened waterglass.