High strength ceramic tiles utilizing solid waste from steel re-rolling mill

Abstract

Solid waste from steel re-rolling mill and other industrial solid waste in Bangladesh are present which are used to produce ceramic materials. The concept of utilization of solid wastes embraces the basic principles of recovery, recycling and converting to value added products. Recovery and recycling is a wellrecognized process. It again generates waste which results in a disposal problem. High strength ceramic floor and wall tiles are one of such value added products where solid waste can be used as raw materials as well as filler. Normally, commercial tiles are mainly made in clay, quartz, K-feldspar and Na-feldspar. High strength ceramic tile was made by mixtures containing certain amount of clay, quartz, solid waste from steel re-rolling mill and k-feldspar. Waste glass (Soda-lime silica glass) is used instead of Na-feldspar. The green tiles were fired at different temperatures in the range 1100 – 1175 0 C with soaking time of 1h and the physico-mechanical and others properties and microstructure were investigated. The optimum temperature and optimum properties of high strength ceramic tiles are determined to compare to standard properties of ceramic tiles. The results revealed that the solid waste from steel re-rolling mill acts as a filler as like quartz when it is used as an additive in ceramic mixture. The prepared high strength ceramic tiles utilizing solid waste from steel re-rolling mill increases the strength or modulus of rupture with increasing temperature and after a certain temperature, these values decrease. Modulus of rupture (133Mpa) is very high in porcelain tiles at 11000C (Optimum Temperature) according to ASTM standard values. The bulk density values increase with increasing temperature.

Images