Phosphogypsum can be used as a sulphate activator for the lime and fly ash system,but this system sets slowly and its early compressive strength is not high under the normal temperature.

• 石灰、粉煤灰胶结体系中,可用磷石膏作粉煤灰的硫酸盐激发剂,但该系统在常温下凝结较慢,早强不高。