CLEANER FLY ASH MAKES BETTER CONCRETE

摘要

Coal plants in the U.S. produce 59 million tons of fly ash each year, about 12 million tons of which has been sold for use in concrete, according to the Electric Power Research Institute, Palo Alto, Calif. But nitrogen oxide (NO_x) reduction technologies, which improve air quality by eliminating carbon from coal plant emissions, have made some fly ash unusable in concrete.