Present and Future Use of Coal Ash in Construction and Related Applicationsby Samuel S. Tyson, American Coal Ash Assoc, Washington, United States,
Document Type: Proceeding Paper
Part of: Utilization of Industrial By-Products for Construction Materials
The American Coal Ash Association, Inc. (ACAA) is an organization of producers and marketers of coal combustion by-products. An annual survey of coal-burning electric utilities is conducted by ACAA to determine the quantities of coal ash produced and used in the USA. In 1991 approximately 89 million tons of coal ash were produced in the form of fly ash, bottom ash, boiler slag and by-product from flue gas desulfurization (FGD). Approximately twenty-five percent of the combined production of these by-products was used, while the remaining three-quarters was deposited in disposal areas. The major markets for coal ash include cement and concrete products, structural fills, road-base layers, mineral filler in asphalt, grit for snow and ice control, blasting and roofing granules, grouting, coal mining applications, and waste solidification and stabilization.
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