Influence of fibres content on performance parameters of refractory concrete

Abstract

Various kinds of fibres are used to improve the quality of refractory. Properties of the refractory concrete with addition of the fibres produced from industrial waste catalyst were investigated. The object is to investigate the contribution of the fibres content on mechanical strength of the refractory concrete after short and long thermal treat-ment. Compressive and flexural strength of the plain con-crete and modified with 1% and 3% of the fibres was de-termined after 3 and 48 hours firing periods at 800°C and 1000°C. Experimental results showed that the highest compressive and flexural strength was determined for the refractory concrete reinforced with 1% of the fibres after long exposure at 1000°C. However, it was observed that the mechanical strength of the concrete decreases with the increasing content of the fibres; meanwhile, presence of the fibres exhibits more ductile behaviour. It was deter-mined that addition of the fibre reduces thermal shrinkage of the refractory concrete after short and long thermal treatment at high temperature.