The results showed that the cement containing washed PG had longer setting time than the cement with natural gypsum(NG), while PG mixed with slacked lime had the same effectiveness as NG.

• 结果表明,水洗磷石膏做调凝剂其凝结时间长于掺天然石膏的水泥;石灰中和磷石膏与天然石膏的效果比较一致;