【摘要】 磷石膏作为湿法磷酸的工业废弃物，主要应用于建筑材料、化学工业、农业等领域。因磷石膏内部含有未完全分解的磷矿、残余的磷酸、氟化物、酸不溶物、有机质等杂质，使其在建筑材料领域利用率较低，通常掺入其他水硬性材料对磷石膏进行改性，而改性后的磷石膏基复合胶凝材料的耐水性较差。针对磷石膏基复合胶凝材料耐水性较差的问题，本文综合前人已有的研究，论述了掺加不同掺合料对磷石膏基材料耐水性的影响，包括掺加水泥、粉煤灰、硅灰、矿渣、减水剂、含氢硅油、石蜡、有机硅、聚乙烯醇、三乙醇胺、碱性激发剂等，以及改善水胶比、粒径和养护方式、合理安排组分设计等辅助方法，总结分析了不同掺合料对磷石膏基复合胶凝材料耐水性的影响机理，阐述了掺合料对磷石膏基材料的的作用机理，确定了合理的掺合料掺加范围。更多还原

【Abstract】 Phosphogypsum, as an industrial waste of wet process phosphoric acid, is mainly used in fields such as building materials, chemical industry, and agriculture. Due to the incomplete decomposition of phosphate rock, residual phosphoric acid, fluoride, acid insoluble substances, organic matter and other impurities inside phosphogypsum, its utilization rate in the field of building materials is low. Usually, other hydraulic materials are added to modify phosphogypsum, but the water resistance of the modified phosphogypsum-based composite cementitious material is poor. In response to the problem of poor water resistance of phosphogypsum-based composite cementitious materials, this article summarizes previous research and discusses the influence of adding different admixtures on the water resistance of phosphogypsum-based materials, including cement, fly ash, silica fume, slag, water reducing agent, hydrogen containing silicone oil, paraffin, organic silicon, polyvinyl alcohol,triethanolamine, alkaline activator, etc,and auxiliary methods such as improving the water cement ratio, particle size and curing method, and arranging component design reasonably. It summarizes and analyzes the influence mechanism of different admixtures on the water resistance of phosphogypsum-based composite cementitious materials, elaborates on the action mechanism of admixtures on phosphogypsum-based materials, and determines the reasonable range of admixtures.更多还原