RECYCLING OF MARBLE AND GRANITE WASTE IN THE PRODUCTION OF VITRIFIED CLAY PIPES

Abstract

Marble and Granite industry powder wastes have high alkaline nature that causing serious damage to the environment. Recycling of these wastes into production of vitrified clay pipe as a partial replacement of the standard clay pipe mixture was investigated. Samples consisting of standard pipe mixture and waste content varying from 0-35% were formed using marble and granite powder waste individually. They were molded, dried and fired at temperatures of (1000, 1100, 1150, 1200 and 1250 °C) for 3 hour. Different tests were conducted on clay pipe combined wastes specimens so as to evaluate the suitability of addition of wastes in the production of vitrified clay pipes. Tests including plasticity, linear drying shrinkage and modulus of rupture were performed on green unfired bodies.