Journal of the Architectural Institute of Korea Structure & Construction (대한건축학회논문집:구조계)

Architectural Institute of Korea (대한건축학회)
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Experimental Study on the Flexural Strengthening Effect of Recycled Coarse Aggregate RC Beams Strengthened with Carbon Fiber Reinforced Polymers

탄소섬유보강재로 보강한 순환골재 콘크리트보의 휨보강효과에 관한 실험적 연구

  • 김우석 (금오공과대학교 건축학부) ;
  • 박희만 (금오공과대학교 건축학부) ;
  • 김봉필 (금오공과대학교 건축학부) ;
  • 백승민 (금오공과대학교 건축학부) ;
  • 곽윤근 (금오공과대학교 건축학부)
  • Received : 2013.12.04
  • Accepted : 2014.06.19
  • Published : 2014.07.30
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Abstract

Recycled coarse aggregates (RCAs) made by construction waste can be used as concrete aggregates. Nevertheless, some studies have indicated that increasing the RCA replacement ratios of the reinforced concrete (RC) structures resulted in a decrease in failure load capacity, in strength degradation, and in severe cracking. In this study, the use of carbon fiber reinforcement polymer (CFRP) sheets and CFRP plates in RC structures was evaluated for their effect in suppressing cracking and in adding strength to the structure. Twelve specimens including five control beams were fabricated, using various recycled coarse aggregate substitution rates, to compare and analyze the CFRP material's reinforcement effects. All specimens were fabricated with stirrups as simple beams with fixed span to effective depth ratio of 3.88 to 1 (i.e., a/d=3.88). The main variables studied in this investigation are (1) replacement level of recycled coarse aggregates (0, 15, 30 and 50%), (2) tensile reinforcement ratio (0.8, 1.27%), and (3) the incorporation of CFRP sheets and/or CFRP plates.

Keywords

Acknowledgement

Supported by : 금오공과대학교

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Cited by

  1. A Study on the Mechanical Properties of Para-aramid Fiber-Reinforced Concrete using Environment-Friendly Recycled Coarse Aggregates vol.9, pp.1, 2018, https://doi.org/10.11004/kosacs.2018.9.1.062