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首页> 外文期刊>NDT & E international >Characterization of ASR damage in concrete using nonlinear impact resonance acoustic spectroscopy technique
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Characterization of ASR damage in concrete using nonlinear impact resonance acoustic spectroscopy technique

机译：非线性冲击共振声谱技术表征混凝土中的ASR损伤

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摘要

This research reports on a successful application of the nonlinear impact resonance acoustic spectroscopy (NIRAS) technique for the characterization of progressive damage in standard concrete specimens. Damage in the specimens is introduced, following ASTM C 1293 testing procedures, through the deleterious alkali-silica reaction (ASR), which leads to the formation of a gel-like reaction product, microcracks, and interfacial debonding between cement and aggregate phases. The microcracks and debonded interfaces act to increase the nonlinearity of concrete. The response of the specimen to impact loading is analyzed to obtain a nonlinearity parameter, which is used as a measure of damage. Measurements are performed on concrete prisms undergoing the ASTM C 1293 expansion test; three aggregates with varying reactivity are examined. The results from the expansion test are compared with those from the NIRAS measurements. For potentially reactive aggregate, the NIRAS technique offers a more definitive assessment of the damage state of the specimen and can be used to distinguish marginally reactive aggregates. The NIRAS results not only demonstrate a clear distinction between nonreactive and reactive aggregates using the nonlinearity parameter, but also the capability to quantitatively track ASR-induced damage in concrete, potentially forming the foundation for field assessment and monitoring.
机译：这项研究报告了非线性冲击共振声谱技术（NIRAS）技术在表征标准混凝土标本中进行性损伤方面的成功应用。按照ASTM C 1293测试程序，通过有害的碱-硅反应（ASR）引入了样品中的损伤，这导致了凝胶状反应产物的形成，微裂纹以及水泥和骨料相之间的界面剥离。微裂纹和脱粘界面的作用是增加混凝土的非线性。分析样品对冲击载荷的响应，以获得非线性参数，该非线性参数用作损伤的度量。测量是在经过ASTM C 1293膨胀测试的混凝土棱镜上进行的；检查了三种具有不同反应性的聚集体。将扩展测试的结果与NIRAS测量的结果进行比较。对于潜在的反应性聚集体，NIRAS技术可对样品的损伤状态提供更确定的评估，并可用于区分边缘反应性聚集体。 NIRAS结果不仅证明了使用非线性参数明确区分非反应性骨料和反应性骨料，而且还具有定量跟踪混凝土中ASR引起的损伤的能力，从而有可能为现场评估和监测奠定基础。

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  • 来源
    《NDT & E international》 |2011年第8期|p.721-727|共7页
  • 作者

    Krzysztof J. Lesnicki; Jin-Yeon Kim; Kimberly E. Kurtis; Laurence J. Jacobs;

  • 作者单位

    C. W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, 790 Atlantic Dr, Atlanta, GA 30332-0405, United States;

    School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0355, United States;

    School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0355, United States;

    C. W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, 790 Atlantic Dr, Atlanta, GA 30332-0405, United States School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0355, United States;

  • 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

    nonlinear acoustics; vibration; concrete; alkali-silica reaction; ASR;

    机译：非线性声学振动;具体;碱硅反应ASR;

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