Recycling of Coal Fly Ash in Building Materials: A Review

Coal fly ash (CFA) is a type of solid waste produced in the process coal combustion, which rich silicon oxide, aluminum oxide and small number heavy metals radioactive elements. Therefore, CFA considered secondary resource with high recovery value. Currently, mainly reused fields building materials, mine backfilling, soil conditioners fertilizers, among production materials one most important ways to realize large-scale utilization CFA. This paper introduces physical chemical properties, classification environmental impact summarizes status such as cement, concrete, ceramics geopolymers, well management policy In addition, existing problems material are analyzed, their development prospects discussed.