Effect of some added materials on dicalcium silicate

Studies of binary systems are helpful in the investigation of polycomponent systems forming industrial products, such as portland cement, dolomite refractories, or blast-furnace slags . Details are given of the application of differential heating and cooling curves to the determination of the temperature of the ab;{J inversion of 2CaO.Si02 in binary mixtures with CaO, SiOz, AIzOa, MgO, FezOa, CaFz, Ti02, BaO, Cr20a, BzOa, MnzOa, V20 6, PZ0 6, Na20, and K 20. These added materials, excepting CaO, lowered the temperature of the a-.=2{J inversion and estimates of the limits of solid solution in a-2CaO.Si02 are given . X-ray patterns of {J-2CaO.Si02 containing BaO, PZ0 6, NazO, or K 20 indicated the existence of solid solutions of the substitution type. Observations were made of the effectiveness of the added materials in preventing dusting, which results from the {J--+'Y inversion of 2CaO.SiOz. It was found that MnzOa should be added to the list of known chemical inhibitors of dusting. CONTENTS Page