Thermal and mechanical properties of high alumina low cement castable

Abstract

Alumina based low cement castable (LCC) was synthesized and then treated from room temperature to 1600°C. Ultrasonic measurements were applied with the aim to obtain results of longitudinal and transversal ultrasonic velocities as well as Young's modulus of elasticity. Changes in microstructure of the samples treated at different temperatures were observed by SEM and image analyses. Correlation among mechanical, physical, and elastic properties and microstructure were also discussed. Results show that heating temperature, microstructure, and porosity have strong influence on cold crushing, flexural, and tensile strength as well as on Young's modulus of elasticity.