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.