한국구조물진단유지관리공학회 논문집 (Journal of the Korea institute for structural maintenance and inspection)

  • 제19권2호
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  • Pages.117-124
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  • 2015
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  • 2234-6937(pISSN)
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  • 2287-6979(eISSN)
한국구조물진단유지관리공학회 (Korea Institute for Structural Maintenance Inspection)
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코코넛 섬유 혼입률에 따른 RHA 및 OPC 콘크리트의 역학적 특성

Mechanical Properties in Rice Husk Ash and OPC Concrete with Coconut Fiber Addition Ratios

  • 이민희 (호원대학교 건축공학과) ;
  • 권성준 (한남대학교 건설시스템공학과) ;
  • 박기태 (한국건설기술연구원 인프라구조연구실)
  • 투고 : 2014.10.27
  • 심사 : 2014.12.26
  • 발행 : 2015.03.30
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초록

건설분야에서 이산화탄소를 저감하기 위해 최근들어 친환경 혼화재료가 많이 사용되고 있다. 또한 콘크리트의 취성파괴를 보완하기 위해 다양한 섬유재의 사용이 고려되고 있다. 본 연구에서는 Rice Ash Husk를 10% 및 20% 치환한 콘크리트를 제조하였으며, 천연섬유 (코코넛 섬유)를 0.125%, 0.250%, 0.375% 혼입하면서 역학적 특성을 평가하였다. 평가를 위해 압축강도, 쪼갬인장강도, 휨강도, 내충격성, 부착강도 등이 평가되었으며, 휨부재의 하중에 따른 균열 및 변위를 분석하였다. RHA를 첨가한 콘크리트는 압축강도를 효과적으로 개선하였으며, 섬유재를 0.125%를 첨가하였을 때, 인장강도, 연성증가 그리고 균열저항성 등이 뚜렷하게 개선되었다. RHA 및 첨연섬유는 자원의 재활용 뿐 아니라 콘크리트의 성능도 개선할 수 있으므로 효과적인 건설재료라고 판단된다.

Currently, Eco-friendly construction materials are widely utilized for reducing $CO_2$ emission in construction. Furthermore various engineering fibers are also added for improving a brittle behavior in concrete. In the paper, concrete specimens with 10% and 20% replacement ratio with RHA (Rice Husk Ash) are prepared, and engineering behaviors in RHA and OPC concrete are evaluated with different addition of coconut fiber from 0.125~0.375% of volume ratio. Several basic tests including compressive strength, tensile strength, flexural strength, impact resistance, and bond strength are performed, and crack width and deflections are also measured in flexural test. RHA is evaluated to be very effective in strength development and 0.125% of fiber addition leads significant improvement in tensile strength, ductility, and crack resistance. RHA and coconut fiber are effective construction material both for reutilization of limited resources and performance improvement in normal concrete.

키워드

참고문헌

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피인용 문헌

  1. Evaluation of Durability Performance of Fly Ash Blended Concrete due to Fly Ash Replacement with Tire Derived Fuel Ash vol.28, pp.6, 2016, https://doi.org/10.4334/JKCI.2016.28.6.647