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首页> 外文期刊>Construction and Building Materials >Compressive behavior of steel fiber reinforced recycled aggregate concrete after exposure to elevated temperatures
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Compressive behavior of steel fiber reinforced recycled aggregate concrete after exposure to elevated temperatures

机译：钢纤维增强再生骨料混凝土在高温下的抗压性能

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摘要

For sustainability considerations, the use of recycled aggregate in concrete has attracted many interests in the research community. One of the main concerns for using such concrete in buildings is its spalling in fire. This may be alleviated by adding steel fibers to form steel fiber reinforced recycled aggregate concrete (SFRAC). This paper presents an experimental investigation into the compressive properties of SFRAC cylinders after exposure to elevated temperatures, including the compressive strength, Young's modulus (stiffness), stress-strain curve and energy absorption capacity (toughness). The effects of two parameters, namely steel fiber volume content (0%, 0.5%, 1%, 1.5%) and temperature (room temperature, 200 ℃, 400 ℃ and 600 ℃) on the compressive mechanical properties of concrete were investigated. The test results show that both compressive strength and stiffness of the concrete are significantly reduced after exposure to high temperatures. The addition of steel fibers is helpful in preventing spalling, and significantly improves the ductility and the cracking behavior of recycled aggregate concrete (RAC) after exposure to high temperatures, which is favorable for the application of RAC in building construction.
机译：出于可持续性考虑，在混凝土中使用再生骨料引起了研究界的许多兴趣。在建筑物中使用这种混凝土的主要问题之一是其在火灾中散落。通过添加钢纤维以形成钢纤维增强的再生骨料混凝土（SFRAC），可以缓解这种情况。本文对SFRAC钢瓶在高温下的压缩性能进行了实验研究，包括压缩强度，杨氏模量（刚度），应力应变曲线和能量吸收能力（韧性）。研究了钢纤维体积含量（0％，0.5％，1％，1.5％）和温度（室温，200℃，400℃和600℃）这两个参数对混凝土压缩力学性能的影响。测试结果表明，暴露于高温后，混凝土的抗压强度和刚度均显着降低。添加钢纤维有助于防止剥落，并显着提高再生骨料混凝土（RAC）暴露于高温后的延展性和开裂行为，这有利于RAC在建筑施工中的应用。

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  • 来源
    《Construction and Building Materials》 |2014年第30期|1-15|共15页
  • 作者

    G.M. Chen; Y.H. He; H. Yang; J.F. Chen; Y.C. Guo;

  • 作者单位

    School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China;

    School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China;

    School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China;

    School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China ,School of Planning, Architecture and Civil Engineering, Queen's University Belfast, UK;

    School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China;

  • 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

    Steel fiber; Recycled aggregate concrete; Elevated temperature; Compressive behavior; Stress-strain relationship;

    机译：钢纤维;再生骨料混凝土;温度升高;压缩行为;应力应变关系;

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