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Published online by Cambridge University Press: 06 March 2019
Fly ash is a finely divided particulate material that is removed from the flue gases of pulverized coal burning power plants. Recent emphasis on the utilization of fossil fuel (i.e., coal) has created a serious waste disposal problem in that, of the 60 million tons of fly ash produced annually in the United States, only about 20% is being utilized [1], The remaining fly ash (about 48 million tons per year) must be disposed of in some environmentally safe manner.