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

  • 제18권1호
  • /
  • Pages.1-9
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  • 2014
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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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순환굵은골재 치환율에 따른 고강도 철근콘크리트 보의 휨 거동

Flexural Behavior of High Strength Reinforced Concrete Beams by Replacement Ratios of Recycled Coarse Aggregate

  • 이용택 (한밭대학교 건축공학과) ;
  • 홍성욱 (한밭대학교 건축공학과) ;
  • 김승훈 (한밭대학교 건축공학과) ;
  • 백상기 (한밭대학교 건축공학과) ;
  • 조영상 (한양대학교 건축학부)
  • 투고 : 2013.11.14
  • 심사 : 2013.12.02
  • 발행 : 2014.01.30
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초록

본 연구는 순환굵은골재 콘크리트의 활용성 증대 및 규준 정립에 관한 연구의 일환으로 순환굵은골재 치환율에 따른 고강도 철근콘크리트 보의 휨 특성을 검토하고자 한다. 실험은 콘크리트 설계강도 40MPa, 50MPa, 60MPa 순환굵은골재 치환율 0%, 30%, 50%, 100%를 변수로 총 12개의 실험체를 제작하여 최종 파괴 시까지 변위제어 방식에 의해 2점 가력하였다. 실험결과 천연골재를 사용한 실험체와 비교시 균열발생 및 파괴양상의 경우, 순환굵은골재를 사용한 철근콘크리트 보의 실험체는 천연골재 철근콘크리트 보 실험체에 비해 균열이 비교적 압축측까지 진전하는 특성을 보였으나 전반적으로 균열양상은 유사하게 나타났으며, KCI 설계기준식에 의한 계산값 및 실험결과의 비교결과 순환굵은골재 치환율에 관계없이 1.08~1.29로 기준값을 상회하는 것으로 나타나 순환굵은골재를 사용한 콘크리트 보의 휨 부재설계에 적용 가능할 것으로 판단된다. 따라서 순환굵은골재 활용성 증대를 위해 추가적인 실험을 통하여 순환굵은골재의 구조적 기준정립이 필요할 것으로 판단된다.

Recently, natural aggregate was adequate to supply the demand due to increase of building construction. National pollution induced by construction waste caused by the reconstruction and redevelopment was cited as the major social issues in Korea. Therefore, government are required by law to use the recycled aggregate. In order to consider safety, KS F 2573 recommend that recycled aggregate with below design strength 27MPa and replacement ratio of 30%. This study on flexural behaviors of reinforced concrete beam was conducted and the specimens employed in test were planed with high strength concrete (40, 50 and 60MPa) and recycled aggregate replacement ratio (0, 30, 50, 100%). Although the flexural strength of reinforced concrete beam has trendy to decrease with increase of replacement ratio, it is meet to KCI 2007. The comparison results show that reinforced concrete beam using recycled aggregate can apply as flexural member in building construction.

키워드

참고문헌

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