Elastic properties of refractory aluminosilicate concrete based on high-alumina cement

Conclusions The authors have determined the dynamic modulus of elasticity of aluminosilicate concrete in relation to the heating and cooling temperature of the latter, the amount of high-alumina cement, and the Al₂O₃ content of the filler.The change in the modulus of elasticity at different temperatures permits an assessment of the character of the structural changes in the concrete due to dehydration, the content and composition of the vitreous phase, and thermal stresses.Hysteresis between the curves of the modulus of elasticity during heating and cooling has been established. The extent of the hysteresis is determined by the heating temperature and the corresponding amount of the vitreous phase.An increase in the high-alumina cement content from 15 to 25% increases the modulus of elasticity of the concrete at 20–400°C, and an increase in the Al₂O₃ content of the filler increases it at 20–400 and 1250–1400°C.Translated from Ogneupory, No. 6, pp. 22–26, June, 1979.