干湿循环条件下复合石膏基胶凝材料耐水性能研究  

Study on Water Resistance of Composite Gypsum Based Cementitious Materials under Dry Wet Cycle Conditions

作　　者：王存 魏书剑 乔攀举 WANG Cun;WEI Shu-jian;QIAO Pan-ju(China Construction Seventh Engineering Division Group Corp.,Ltd.,Zhengzhou,Henan,450000,China)

机构地区：[1]中国建筑第七工程局,河南郑州450000

出　　处：《建材技术与应用》2024年第6期38-42,共5页Research and Application of Building Materials

摘　　要：通过试验研究硬石膏-磷建筑石膏复合胶凝材料在干湿循环条件下的耐水性能,分析了其耐水性能变化机理。研究表明:复合石膏基胶凝材料相比于磷建筑石膏更容易发生溶蚀,吸水率更高,复合石膏基胶凝材料水化周期相对较长,硬石膏的水化过程很大程度上影响了复合胶凝体系的水化过程。This paper investigates the water resistance of the composite cementitious material of anhydrite and phosphogypsum under dry wet cycle conditions,and analyzes the change mechanism of its water resistance performance.Results has shown that composite gypsum based cementitious materials are more prone to dissolution and have a higher water absorption rate compared to phosphorus building gypsum. The hydration cycle of composite gypsum based cementitious materials is relatively longer. The hydration process of anhydrite greatly affects the hydration process of the composite cementing system.

关 键 词：磷建筑石膏 硬石膏 干湿循环 耐水性能 机理分析 

分 类 号：TU526[建筑科学—建筑技术科学]