硬脂酸盐改性碱矿渣砂浆的抗硫酸盐物理侵蚀性能  

Resistance of Stearate-Modified Alkali-Activated Slag Mortar against Physical Sulphate Attack

作　　者：张雨点 孔润 张哲 邓加鑫 杨凯[1] ZHANG Yudian;KONG Run;ZHANG Zhe;DENG Jiaxin;YANG Kai(College of Materials Science and Engineering,Chongqing University,Chongqing 400045,China;University College London,London WC1E 6BT,UK;Chongqing Yuxiangfuxian Expressway Co.,Ltd.,Chongqing 401121,China;Changzhou Architectural Research Institute Group Co.,Ltd.,Changzhou 213015,China)

机构地区：[1]重庆大学材料科学与工程学院,重庆400045 [2]University College London,伦敦WC1E 6BT [3]重庆渝湘复线高速公路有限公司,重庆401121 [4]常州市建筑科学研究院集团股份有限公司,江苏常州213015

出　　处：《建筑材料学报》2024年第10期904-912,共9页Journal of Building Materials

基　　金：“十四五”国家重点研发计划项目(2023YFB37111400);国家自然科学基金资助项目(52378218)。

摘　　要：测试分析了不同种类硬脂酸盐改性碱激发矿渣(AAS)抗硫酸盐物理侵蚀性能及其变化规律.结果表明:在干湿循环条件下AAS受到明显物理结晶损伤;加入硬脂酸钙(CaSt)、硬脂酸钠(NaSt)后能通过降低吸水速率、改善内部孔结构、减小表观损伤,来提升AAS半浸泡-干湿循环下的抗硫酸钠物理结晶破坏能力;硬脂酸钾(KSt)的加入则加剧了AAS硫酸钠物理结晶破坏.Three types of stearates were used to modify alkali‑activated slag(AAS)and the variation of its performance was examined and analysed under sodium sulphate environment.AAS exhibits significant physical crystallisation damage under wet‑dry cycles of sodium sulphate.The addition of calcium stearate(CaSt)and sodium stearate(NaSt)can improve the resistance of AAS against physical crystallisation damage of sodium sulphate by decreasing its sorptivity,optimizing its micro‑structure,and mitigating its appearance damage in the semi‑immersion‑wet‑dry cycle environment,whereas the potassium stearate(KSt)exacerbates the physical crystalline damage of sodium sulphate of AAS.

关 键 词：碱矿渣水泥 结晶破坏 硬脂酸盐 吸水速率 孔结构 

分 类 号：TQ172.717[化学工程—水泥工业]