Computers and Concrete

  • 제4권3호
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  • Pages.207-220
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  • 2007
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

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Mechanical behaviors of concrete combined with steel and synthetic macro-fibers

  • Deng, Zongcai (School of Civil and Architecture Engineering, Beijing University of Technology) ;
  • Li, Jianhui (School of Civil and Architecture Engineering, Beijing University of Technology)
  • 투고 : 2007.02.22
  • 심사 : 2007.07.02
  • 발행 : 2007.06.25
⟨ 이전 논문 다음 논문 ⟩

초록

In this paper, hybrid fibers including high elastic modulus steel fiber and low elastic modulus synthetic macro-fiber (HPP) as two elements were used as reinforcement materials in concrete. The flexural toughness, flexural impact and fracture performance of the composites were investigated systematically. Flexural impact strength was analyzed with statistic analyses method; based on ASTM and JSCE method, an improved flexural toughness evaluating method suitable for concrete with synthetic macro-fiber was proposed herein. The experimental results showed that when the total fiber volume fractions ($V_f^a$) were kept as a constant ($V_f^a=1.5%$), compared with single type of steel or HPP fibers, hybrid fibers can significantly improve the toughness, flexural impact life and fracture properties of concrete. Relative residual strength RSI', impact ductile index ${\lambda}$ and fracture energy $G_F$ of concrete combined with hybrid fibers were respectively 66-80%, 5-12 and 121-137 N/m, which indicated that the synergistic effects (or combined effects) between steel fiber and synthetic macro-fiber were good.

키워드

참고문헌

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피인용 문헌

  1. Performance and modeling of high-performance steel fiber reinforced concrete under impact loads vol.13, pp.2, 2014, https://doi.org/10.12989/cac.2014.13.2.255
  2. Minor defect correlation with dynamic elastic properties of polypropylene fiber-reinforced concrete vol.7, pp.2, 2018, https://doi.org/10.1680/jemmr.15.00068
  3. Relations between rheological and mechanical properties of fiber reinforced mortar vol.20, pp.4, 2007, https://doi.org/10.12989/cac.2017.20.4.449
  4. Early-age stress relaxation and cracking potential of High-strength concrete reinforced with Barchip fiber vol.258, pp.None, 2007, https://doi.org/10.1016/j.conbuildmat.2020.119538
  5. Crack Propagation Analysis of Synthetic vs. Steel vs. Hybrid Fibre-Reinforced Concrete Beams Using Digital Image Correlation Technique vol.14, pp.1, 2020, https://doi.org/10.1186/s40069-020-00427-8