钾明矾对硬石膏复合胶凝材料物理力学性能的影响  

Influence of aluminum potassium sulfate dodecahydrate on physical and mechanical properties of anhydrite composite cementitious materiall

作　　者：郭旭东 贾兴文[2] 张晖 黄宇航 李恒 高丹 GUO Xu-dong;JIA Xing-wen;ZAHGN hui;HUANG Yu-hang;Li Heng;GAO Dan

机构地区：[1]云南云天化环保科技有限公司,云南昆明650302 [2]重庆大学材料科学与工程学院,重庆400045

出　　处：《砖瓦》2022年第11期9-12,15,共5页Brick-tile

基　　金：云南云天化环保科技有限公司研究开发项目(YTHXDNY-202111-0106)。

摘　　要：钾明矾与矿渣和水泥是制备硬石膏复合胶凝材料时常用的激发剂和改性材料,论文对比研究了钾明矾、普通硅酸盐水泥和矿渣复掺对磷硬石膏复合胶凝材料(ACCM)凝结时间、抗压强度、膨胀率和耐水性的影响。研究结果表明,钾明矾的适宜掺量与水泥掺量密切相关,未掺加水泥时,钾明矾在硬石膏体系中的适宜掺量为1%~2%;掺加水泥时,ACCM中钾明矾的适宜掺量为1%。当水泥掺量为3%~8%,钾明矾掺量为1%时,ACCM具有良好的物理力学性能,可以满足潮湿环境对石膏制品力学性能和耐水性的要求。KAl(SO_(4))_(2)•12H_(2)O,slag and cement are commonly used as activators and modifiers in the preparation of anhydrite composite cementitious materials.The effects of the content of KAl(SO_(4))_(2)•12H_(2)O,cement and slag on the setting time,compressive strength,expansion rate and water resistance of anhydrite composite cementitious material(ACCM)were studied.The results show that the appropriate amount of KAl(SO_(4))_(2)•12H_(2)O is closely related to the cement content.The appropriate amount of KAl(SO_(4))_(2)•12H_(2)O in anhydrite system without cement is 1%~2%;however,the appropriate amount of KAl(SO_(4))_(2)•12H_(2)O in ACCM with cement is 1%.When the cement content is in the range of 3%~8%and the content of KAl(SO_(4))_(2)•12H_(2)O is 1%,ACCM with good physical and mechanical properties can be obtained,which can meet the requirements of wet environment on the mechanical properties and water resistance of gypsum products.

关 键 词：磷硬石膏 硬石膏复合胶凝材料 钾明矾 抗压强度 体积稳定性 耐水性 

分 类 号：TU526[建筑科学—建筑技术科学]