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The resistance of high alumina cement against corrosion of steel in concrete

机译：高铝水泥对混凝土中钢腐蚀的抵抗力

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摘要

The present study concerns the resistance of high alumina cement (HAC) concrete to chloride-induced corrosion, in terms of corrosion behaviour, binding of chloride ions and chloride transport. The corrosion resistance was evaluated using concrete specimens containing steel rebar exposed to a salt environment. The binding capacity of chloride ions was measured at 28, 58 and 91 days by the water extraction method. The rate of chloride transport was expressed into apparent diffusion coefficient and surface chloride content. The strength test was also performed at up to 365 days. As a result, it was found that the compressive strength for HAC concrete was always higher than for OPC, although a reduction of the strength for HAC concrete was observed at 28 days. The corrosion rate in HAC mortar and concrete indicated the lower values than OPC ones in spite of the lower chloride binding capacity of HAC paste. For chloride transport, there is only marginal difference in the diffusivity of chloride ions between in HAC and OPC concrete.
机译：本研究涉及高铝水泥（HAC）混凝土对氯引起的腐蚀的抵抗性，包括腐蚀行为，氯离子的结合和氯的运输。使用含有暴露于盐环境的钢筋的混凝土样品评估了耐腐蚀性。通过水萃取法在28、58和91天测量氯离子的结合能力。氯的传输速率表示为表观扩散系数和表面氯含量。强度测试也进行了长达365天。结果发现，尽管在28天时观察到HAC混凝土的强度降低，但HAC混凝土的抗压强度始终高于OPC。尽管HAC糊料的氯离子结合能力较低，但HAC砂浆和混凝土的腐蚀速率仍低于OPC。对于氯离子的运输，在HAC和OPC混凝土之间，氯离子的扩散率仅存在很小的差异。

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  • 来源
    《Construction and Building Materials》 |2010年第8期|p.1502-1510|共9页
  • 作者

    K.Y. Ann; T.-S. Kim; J.H. Kim; S.-H. Kim;

  • 作者单位

    School of Civil and Environmental Engineering, Yonsei University, Seoul 120-740, Republic of Korea;

    rnSchool of Civil and Environmental Engineering, Yonsei University, Seoul 120-740, Republic of Korea;

    rnSchool of Civil and Environmental Engineering, Yonsei University, Seoul 120-740, Republic of Korea;

    rnSchool of Civil and Environmental Engineering, Yonsei University, Seoul 120-740, Republic of Korea;

  • 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
  • 中图分类
  • 关键词

    high alumina cement; corrosion; chloride; diffusion; binding;

    机译：高铝水泥腐蚀;氯化物;扩散;捆绑;

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