Low-Energy Consumption Preparation of Fine Waterproof Cementitious Material with High-Volume Phosphogypsum

Phosphogypsum (PG) is an industrial solid waste which is difficult to dispose of and can cause environmental pollution. This paper investigated a low-energy-consumption preparation from PG of an environmentally friendly building material. PG was converted to α hemihydrate gypsum (α-HH) using the nonautoclaved method. Then the α-HH from PG (PGHH) was mixed with different dosages of fly ash and/or cement to obtain PGHH–fly ash–cement (PFC)...