Fly Ash – more important than you think
THE BASICSCoal Fly Ash (from CSI Section 03 05 13) Coal fly ash is a waste product of coal-fired power plants and can be used as a substitute for some of the portland cement in a concrete mixture-up to 60% is common, but even higher levels of substitution are possible. It makes the concrete stronger and gives it improved workability compared with a conventional mix. The environmental advantages include reducing the use of high-embodied-energy portland cement and reusing an otherwise landfilled...
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