Comprehensive studies of the phase composition of refractory concrete compositions, heat-treated in various temperature ranges, including when the glass-melting units are put into operation, have been carried out. The characteristic changes in the phase composition of unfired concrete in the process of preliminary heat treatment have been established; after firing at 1000 ° C, a new phase appears - calcium aluminosilicate 2CaO Al 2 O 3 SiO 2 , which indicates the interaction in the sample of aluminates calcium with free silica - microsilica or aluminosilicates. Il. 3, bibliography: 7 titles.
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