Conclusions
Structure evolution of the corundum concretes based on the binders of different compositions was studied.
We demonstrated the effect of Cr2O3, CCLS, and technological (technical-grade) lignosulfonate on the strength gain of the cement stone and the concrete based on it, the phase composition of the cement stone and the concrete, their variation during the process of heat treatment, and on the microstructure.
The ability of these additives to increase the degree of hydration of the high-alumina cement was established. The formation of a large quantity of aluminum hydroxide and calcium hydromonocarboaluminate confirm this fact.
The evolution of a dense and strong structure of the corundum concrete based on the high-alumina cement and the occurrence of additional growth during the high-temperature firing process due to the formation of CA6 and the solid solutions of corundum and CA6 with Cr2O3 were shown.
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Translated from Ogneupory, No. 4, pp. 7–14, April, 1989.
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Gal'chenko, T.G., Usatikov, I.F., Gavrish, A.M. et al. Structure evolution of corundum concretes. Refractories 30, 203–211 (1989). https://doi.org/10.1007/BF01326668
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DOI: https://doi.org/10.1007/BF01326668