Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Structural Capacity of Poles Using Crack Self-healing Concrete

균열자기치유용 콘크리트를 사용한 전주의 구조 성능

  • Yoo, Sung-Won (Dept. of Civil and Environmental Eng. Gachon University) ;
  • Kim, Sang-Jun (Dept. of Civil and Environmental Eng. Gachon University) ;
  • Park, Hong-Gi (Dept. of Civil and Environmental Eng. Gachon University)
  • 유성원 (가천대학교 토목환경공학과) ;
  • 김상준 (가천대학교 토목환경공학과) ;
  • 박홍기 (가천대학교 토목환경공학과)
  • Received : 2018.09.17
  • Accepted : 2018.09.27
  • Published : 2018.09.30
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Abstract

Recently, due to the deterioration and various natural disasters caused by the passage of concrete pole for 20~30 years or more, damage and destruction of the poles have increased the demand for maintenance. In this paper, 10 flexural strength test specimens were fabricated by using crack self - healing concrete of Fly ash, GGBS, CA, etc. The compressive strength of the concrete with slag was found to be excellent, but the concrete with fly ash was slightly below the reference strength. In addition, the crack loadings of the specimens satisfied the criteria of KS F 4304. In the case of the load-deflection and strain relations, the behavior of the fly ash specimens was similar, but in the specimens containing the blast furnace slag, The results showed that a large amount of strain occurred.

최근 콘크리트 전주의 20~30년 이상 경과로 인한 노후화와 각종 자연재해로 인하여 전주의 손상/파괴로 인해 유지 보수에 대한 요구가 증가하고 있다. 이를 위해 최근 전 세계적으로 구조물에 발생한 균열을 스스로 치유하여 유지보수비용을 감소시킬 수 있는 자기치유 콘크리트 기술의 연구가 활발하게 이루어지고 있다. 이에 본 논문에서는 Fly ash, GGBS, CA 등이 혼입된 변수의 균열자기 치유 콘크리트를 이용하여 10m 크기의 실제 전주 10개를 제작하여 휨강도실험을 수행하였다. 고로 슬래그를 첨가한 콘크리트의 압축강도가 우수한 것으로 나타났으나, 플라이 애시를 첨가한 콘크리트는 기준강도에 다소 미달하는 것으로 나타났다. 또한 실험체의 균열하중은 KS F 4304 기준을 만족하였으며, 하중-처짐 및 변형률 관계의 경우, 플라이 애시를 첨가 실험체의 경우에는 유사한 거동을 보였지만, 고로 슬래그가 함유된 실험체의 경우 균열발생 후 결정촉진제가 혼입된 실험체는 대량의 변형률이 발생하는 것으로 나타났다.

Keywords

References

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