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The hydration process of low silica containing calcium aluminate glasses in high-alumina cement was studied. The glasses with the compositions; SiO2 0-15%, CaO 25-50%, Al2O3 45-60%, were prepared by fusion and quenching in water. The mechanism of the hydration varied discontinuously in the above composition range. The ratio of CaO to Al2O3 in glass seems to determine the mechanism of hydration process of low silica containing calcium aluminate glass. The hydration process of calcium aluminate glasses studied was classified into several types, in view of similarity of the hydration process of crystal line calcium aluminate (12CaO•E7Al2O3, CaO•EAl2O3, CaO•E2Al2O3). [Received May 10, 1988; Accepted August 17, 1988]

Influence of Chemical Composition on Hydration of Low Silica Containing Calcium Aluminate Glasses