Nonfibrous castable refractory concrete having high deflection temperature and high compressive strength and process

摘要

A nonfibrous castable refractory concrete, having a deflection temperature under load above 1000 DEG C. and a compressive strength higher than 1450 Newton/cm2, comprising grains bound by a hydraulic binder and having a content by weight of aluminum expressed as Al2O3 of from 40 to 60%, a content by weight of calcium expressed as CaO of from 4 to 14%, a content by weight of silicon expressed as SiO2 of from 20 to 60% and a content by weight of fluorine of from 0.1 to 10%, a part of said fluorine being present as alkali or alkaline earth metal fluoride. The invention also provides a process for making said concrete.