在酸性介质，什么时候就会失去其部分胶凝能力。
磷石膏是磷酸厂排放的工业废渣，不具备胶凝能力，且污染环境。
The phosphorus gypsum is emitted by the factory of phosphoric acid, which can not congeal to the gel, and can pollute the environment.
结果表明：FWC的易磨性优于水泥熟料，FWC具有较强的水化能力和较好的胶凝性，可以作为一种水泥混合材料。
The results show that FWC has better grindability, hydration ability and gelling property, and it can be used as a kind of admixture in cement production.
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