Refractory Castables for Civil Use: Main Properties Depending on Its Application

Quick-setting castables for civil use have been developed for the repair of industrial floors, bridges, airport runways, for fixing of metal parts and in those places where quick release is needed for transit. Some characteristics of the castables are quick setting, compensated shrinkage, high mechanical strength and resistance to aggressive agents. After 24 hours, they have high mechanical strength, good thermal shock resistance and at temperatures between 1000¼C-1200¼C. In this paper it is presented the characterization of three refractory castables with different Al2O3/SiO2/CaO ratios.