| 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. |
| 关键词: 碱矿渣水泥 结晶破坏 硬脂酸盐 吸水速率 孔结构 |
| DOI：10.3969/j.issn.1007-9629.2024.10.005 |
| 分类号:TQ172.71+7 |
| 基金项目:“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） |
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| Resistance of Stearate-Modified Alkali-Activated Slag Mortar against Physical Sulphate Attack |
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ZHANG Yudian1,2, KONG Run3, ZHANG Zhe1, DENG Jiaxin4, YANG Kai1
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1.College of Materials Science and Engineering， Chongqing University， Chongqing 400045， China;2.University College London，London WC1E 6BT， UK;3.Chongqing Yuxiangfuxian Expressway Co.， Ltd.，Chongqing 401121， China;4.Changzhou Architectural Research Institute Group Co.， Ltd.， Changzhou 213015， China
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| Abstract: |
| 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. |
| Key words: alkali-activated slag cement crystalline attack stearate sorptivity pore structure |
