Some aspects of the durability of a phosphogypsum-lime-fly ash binder

Abstract This paper deals with the effect of curing temperature on the durability of a cementitious binder based on calcined phosphogypsum, fly ash and lime. The durability of the binder was studied by its performance in water and accelerated ageing, i.e. alternate wetting and drying as well as heating and cooling cycles at temperatures from 27 °C to 60 °C. The results indicate that the strength of the binder decreased and loss in weight increased with increases in cycles and exposure temperature. The variation in strength and weight loss was assessed by differential thermal analysis and scanning electron microscopy. The maximum fall in strength occurs at 60 °C.