CEMENT

[:ru]Суи Тонгбо[:en]Sui Tongbo[:] [:ru]д-р техн. наук, проф., ген. директор исследовательского инcтитута Sinoma, вице-президент China Sinoma International Engineering Co. Ltd.[:en]Dr.-Ing., Prof., Director General of Sinoma Research Institute, Vice President of China Sinoma International Engineering Co. Ltd.[:]

Alitinform №6 (27) 2012 г. 6-15 p.

Abstract

China, as one of the leading growing economies in the world, is also its largest producer and consumer of cement. The Chinese cement industry produces more than half of the world’s cement and thus consumes a great amount of natural resources and energy as well as emitting a large volume of pollutants such as NOx and greenhouse gases such as CO2. Many types of industrial waste, as a solution to these issues, have been used as alternative raw materials and fuels (AFR) in the cement industry for resource and energy recovery in China [1] in the last 20 to 30 years, and in particular since the 1990s. Sources of industrial waste mainly include iron and steel production, thermal power, the chemical industry and the mining and metallurgical industries. The waste being used in cement industry in China is mainly made up of common industrial residues such as blast furnace slag, coal fly ash, flue gas desulphurization gypsum, phosphogypsum, coal gangue, steel slag, sulphuric acid slag and so on.
The use of industrial waste in cement and concrete in China dates back to 1950s. The following options have been identified for industrial waste disposal as AFR in the cement and concrete industry, namely as supplementary cementitious materials in cement (clinker substitution), as a replacement for natural gypsum for the setting regulation of cement, as a natural resource replacing components in cement raw meal proportions, as alternative fuels to substitute fossil fuels, as concrete mineral admixtures for resources saving and performance improvement, and as main raw materials for making concrete products such as panels and blocks.