Chloride resistance of concrete with metakaolin addition and seawater mixing: A comparative study
Chloride resistance of concrete with metakaolin addition and seawater mixing: A comparative study
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DOI：
10.1016/j.conbuildmat.2015.10.076
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发表时间：
2015-12-30
影响因子：
7.4
通讯作者：
Shui, Zhonghe
中科院分区：
文献类型：
--
作者：
Li, Qiu;Geng, Haining;Shui, Zhonghe
采用分析技术评价了掺偏高岭土（MK）海水混凝土的抗氯离子侵蚀性能。海水拌和与NaCl溶液养护相结合，随着MK掺量的增加，混凝土的抗压强度提高，防止了56 d强度的下降。MK和海水均能提高耐氯离子性，且耐氯离子性随MK含量的增加而增加。通过孔结构的细化和Friedel盐的形成来固定氯化物，减少了氯化物的进入距离。对氯化物侵蚀后的矿物进行了表征。沿着侵入方向的微观结构分析证实了MK和海水对耐氯离子性的改善。(C)2015爱思唯尔有限公司版权所有。
Chloride resistance of concrete with seawater mixing and metakaolin (MK) addition was evaluated by analytical techniques. With the combination of seawater mixing and NaCl solution curing, the compressive strength of concrete increased with MK content, which prevented the decrease of strength at 56 days. Both MK and seawater improved the chloride resistance which increased with MK content. The chloride ingress distance was reduced through the refinement of pore structure and immobilization of chloride by formation of Friedel's salt. The minerals after chloride attack were characterized. The microstructure analysis along ingress direction confirmed the improvement of chloride resistance by MK and seawater. (C) 2015 Elsevier Ltd. All rights reserved.