Influence of LDHs on Chloride Ion Binding in Cementitious Materials
Influence of LDHs on Chloride Ion Binding in Cementitious Materials
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DOI：
10.4028/www.scientific.net/kem.599.34
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发表时间：
2014-02
期刊：
影响因子：
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通讯作者：
P. Duan;Z. Shui;Guowei Chen
中科院分区：
文献类型：
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作者：
P. Duan;Z. Shui;Guowei Chen
层状双金属氢氧化物（LDHs）材料由于具有捕集离子的能力，可用于水泥和混凝土中，提高混凝土的耐久性。本文比较了不同类型水滑石的性质和氯离子结合能力，分析了水滑石氯离子结合的微观机理，并研究了掺水滑石水泥石的氯离子结合性能。实验结果表明，Mg-Al-NO3类水滑石在初始阶段具有较高的氯离子结合能力，但随着混合时间的延长，其氯离子结合能力逐渐减弱，而LDOs的氯离子结合能力逐渐增强。掺入LDH的水泥浆体与参比样品相比具有更高的氯离子结合能力。所有类型的LDHs都对抗氯离子渗透性有有益的影响，特别是添加1%的Mg-Al-NO3 LDOs。
Layered double hydroxides (LDHs) materials could be used in cement and concrete for their ions capturing capacity and to enhance durability of concrete. In this work, properties and chloride binding capacity of different types of LDHs were compared, micro-mechanism of chloride binding of LDHs were analyzed and chloride binding of cement paste incorporating LDHs were investigated. The experimental results show that Mg-Al-NO3 LDHs presents higher chloride ion binding capacity at initial time compared to LDOs calcinated at 500 °C while ion binding capacity of LDHs calms down and LDOs increases with increasing mixing time. Cement paste incorporating LDHs presents higher chloride binding capacity compared with reference sample. All types of LDHs performed beneficial effect on the chloride penetration resistance especially with addition of 1% Mg-Al-NO3 LDOs.