Coal combustion product cements and related methods of production

Abstract

Coal combustion product cement compositions produced using classes of relatively low-cost industrial by-products and low-value minerals. A variety of highly sustainable cements with low-environmental impact can be provided. Coal combustion by-products and other wastes produced on the large scale from the burning of coal or coal and biomass in coal-fired power stations with or without low-value minerals, processed minerals, and / or by-products of the mining, mineral processing, metal refining, petrochemical, fine chemical, pharmaceutical, agrochemical, biotechnology, food, feed and energy industries, as well as agricultural and municipal by-products, can be utilized to provide improved cements and cementitious materials that are more economic and environmentally friendly than traditional cements including Portland cement.

Description

Coal combustion product cement and related production method This application claims the benefit of priority from US Provisional Application US60 / 914021 filed April 25, 2007 and is incorporated by reference in its entirety. technical field The technical field of the application relates to low cost cement produced from low value minerals and by-products of mining, industry, agriculture and municipalities. More specifically, the present application relates to cement formed from coal combustion products, such as fly ash, which are sufficient as practical substitutes for Portland cement. Background technique The construction industry has long been characterized by its vital reliance on Portland cement, a material dating back two centuries, prepared through a technically primitive production process. The production of Portland cement is energy-intensive, uses large amounts of non-renewable resources, and is a major contributor to the world's greenhouse gas emissions. Althoug...

AI Technical Summary

Problems solved by technology

Although reduced-cost cements have been prepared as partial replacements for Portland cement by the addition of materials such as fly ash, slag, silica fume, zeolites and pozzolans, the continued reliance on Portland cement has shown only limited promise. Economic and Environmental Advantages

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