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首页> 外文期刊>Magazine of Concrete Research >Effect of carbonation on release of bound chlorides in chloride-contaminated concrete
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Effect of carbonation on release of bound chlorides in chloride-contaminated concrete

机译：碳化对受氯离子污染的混凝土中结合氯化物释放的影响

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摘要

In this paper an experimental study is presented on the interaction between concrete carbonation and chloride attack. The experiments are carried out on chloride-contaminated cement pastes that have been exposed to a carbon dioxide environment. Free and total chloride contents at different carbonation times are measured in the tested specimens using traditional leaching and acid-soluble methods. Bound chloride contents are calculated from the measured total and free chlorides. The experimental data show that the carbonation of cement paste results in a release of bound chlorides, which is related to not only the decomposition of Friedel's salt, but also the decomposition of calcium-silicate-hydrate (C-S-H) gel. Based on the obtained experimental results, a numerical model is also developed for simulating the carbonation process of the chloride-contaminated cement paste. The model can be used to explain how the bound chlorides are released in a chloride-contaminated cement paste under the influence of carbonation reactions.
机译：本文针对混凝土碳化与氯离子侵蚀之间的相互作用进行了实验研究。实验是在暴露于二氧化碳环境中的氯化物污染的水泥浆中进行的。使用传统的浸出和酸溶方法，在被测样品中测量了不同碳化时间的游离和总氯含量。根据测得的总氯和游离氯计算出结合氯含量。实验数据表明，水泥浆的碳酸化导致结合氯化物的释放，这不仅与弗里德尔盐的分解有关，而且与硅酸钙水合物（C-S-H）凝胶的分解有关。根据获得的实验结果，还建立了一个数值模型来模拟受氯化物污染的水泥浆的碳化过程。该模型可用于解释在碳酸化反应的影响下，结合氯离子如何在受氯离子污染的水泥浆中释放。

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  • 来源
    《Magazine of Concrete Research》 |2016年第8期|353-363|共11页
  • 作者

    Geng Jian; Easterbrook Dave; Liu Qing-Feng; Li Long-Yuan;

  • 作者单位

    Zhejiang Univ, Ningbo Inst Technol, Sch Civil Engn & Architecture, Ningbo, Zhejiang, Peoples R China;

    Univ Plymouth, Sch Marine Sci & Engn, Plymouth PL4 8AA, Devon, England;

    Univ Plymouth, Sch Marine Sci & Engn, Plymouth PL4 8AA, Devon, England|Shanghai Jiao Tong Univ, Sch Naval Architecture Ocean & Civil Engn, State Key Lab Ocean Engn, Shanghai 200030, Peoples R China;

    Univ Plymouth, Sch Marine Sci & Engn, Struct Engn, Plymouth PL4 8AA, Devon, England;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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