Sustainable Use of Industrial Waste in Cement Industry

Environment and economic considerations demand greater utilization of the waste. Cement industry is a major contributor in the emission of CO2 as well as in using up high levels of energy resources in the production of cement. On the other hand productions of large quantities of industrial wastes are resulting in environmental problems with its dumping. Industrial wastes contain some toxic elements and releases into the environment under natural weathering conditions. These toxic elements cause pollution of soils, surface waters and groundwater. The use of theses industrial waste as substitute of cement, control the emission of CO2 and also control the environmental problems associated with its dumping. Industrial wastes, such as copper slag, blast furnace slag, granulated phosphorus slag and steelmaking slag are being used as supplementary cement replacement materials. These wastes exhibit not only good strength properties but also better corrosion resistance than normal Portland cement. The conversion of industrial waste in to cement required the grinding, which needs only approximately 10% of the energy required for the production of Portland cement. Thus industrial waste has great potential in cement industry. In this paper, the recent achievements in the development of high performance cementing materials using different industrial wastes are reviewed