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Study on Factors Affecting RCC (Roller Compacted Concrete) Anti-crack Performance

机译：影响碾压混凝土抗裂性能的因素研究

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摘要

Currently, RCC dam's development is heading from low dam to high dam, from gravity dam to arch dam even to high arch dam, which proposes a higher standard for RCC anti-crack performance. A lot of factors have been identified which affect RCC anti-crack performance, the paper studies on improving RCC anti- crack performance in terms of experiments on cement mineral composition, stone dust content, admixture (MgO), aggregate characteristic (elastic modulus) and sand percentage. The result shows an optimal volume of sand percentage and stone dust content exist in the light of RCC anti-crack performance;in addition, proportional MgO admixture and appropriately increasing C2S and C4AF in cement clinker can improve RCC anti-crack performance as well;besides, aggregate's elastic modulus is a vital impact on RCC's, and the utilization of aggregate of low elastic modulus can dramatically decrease concrete elastic modulus, increase tension train capacity and enhance concrete anti-crack performance.
机译：当前，碾压混凝土坝的发展正从低坝向高坝发展，从重力坝到拱坝甚至是高拱坝，为碾压混凝土抗裂性能提出了更高的标准。已经确定了许多影响RCC抗裂性能的因素，本文针对水泥矿物成分，石材粉尘含量，外加剂（MgO），骨料特性（弹性模量）和砂百分比。结果表明，根据RCC的抗裂性能，存在最佳的砂百分率和石材粉尘含量；此外，水泥熟料中适量的MgO外加剂和适当增加C2S和C4AF也可以改善RCC的抗裂性能；此外，骨料的弹性模量对RCC具有至关重要的影响，利用低弹性模量的骨料可以显着降低混凝土的弹性模量，增加抗拉强度，增强混凝土的抗裂性能。

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  • 来源
  • 会议地点 Guiyang(CN)
  • 作者

    GUAN Hong-bo; rnYANG Bao-an;

  • 作者单位

    Zeng Li@States Key Laboratory of Water Resource and Hydropower Engineering Science of Wuhan University, Wuhan 430072, China--Fang Kunhe@States Key Laboratory of Water Resource and Hydropower Engineering Science of Wuhan University, Wuhan 430072, China--Wu Dingyan@States Key Laboratory of Water Resource and Hydropower Engineering Science of Wuhan University, Wuhan 430072, China--Ruan Yan@States Key Laboratory of Water Resource and Hydropower Engineering Science of Wuhan University, Wuhan 430072, China--;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 挡水坝;
  • 关键词

    RCC (roller compacted concrete); anti-crack performance; stone dust content; elastic modulus;

    机译：RCC（碾压混凝土）；抗裂性能；粉尘含量；弹性模量;

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