Computers and Concrete

  • 제24권1호
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  • Pages.63-71
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  • 2019
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Residual properties of high-strength fiber reinforced concrete after exposure to high temperatures

  • Tang, Chao-Wei (Department of Civil Engineering & Geomatics, Cheng Shiu University)
  • 투고 : 2019.01.16
  • 심사 : 2019.06.04
  • 발행 : 2019.07.25
⟨ 이전 논문 다음 논문 ⟩

초록

Thermal energy from high temperatures can cause concrete damage, including mechanical and chemical degradation. In view of this, the residual mechanical properties of high-strength fiber reinforced concrete with a design strength of 75 MPa exposed to $400-800^{\circ}C$ were investigated in this study. The test results show that the average residual compressive strength of high-strength fiber reinforced concrete after being exposed to $400-800^{\circ}C$ was 88%, 69%, and 23% of roomtemperature strength, respectively. In addition, the benefit of steel fibers on the residual compressive strength of concrete was limited, but polypropylene fibers can help to maintain the residual compressive strength and flexural strength of concrete after exposure to $400-600^{\circ}C$. Further, the load-deflection curve of specimen containing steel fibers exposed to $400-800^{\circ}C$ had a better fracture toughness.

키워드

과제정보

연구 과제 주관 기관 : Ministry of Science and Technology (MOST), Taiwan

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