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

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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Evaluation of Crack Self-healing Performance in Centrifugal Molding Concrete by Permeability Test

원심성형 콘크리트의 투수시험을 통한 균열 자기치유 성능평가

  • Hwang, Chul Sung (Dept. of Civil and Environmental Eng. Gachon University) ;
  • Woo, Hae Sik (Dept. of Civil and Environmental Eng. Gachon University) ;
  • Choi, Young Cheol (Dept. of Civil and Environmental Eng. Gachon University)
  • 황철성 (가천대학교 토목환경공학과) ;
  • 우해식 (가천대학교 토목환경공학과) ;
  • 최영철 (가천대학교 토목환경공학과)
  • Received : 2018.03.09
  • Accepted : 2018.04.26
  • Published : 2018.05.01
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Abstract

Recently, study on self-healing materials have been performed to increase the life by repairing the damage of structures themselves, which are difficult to repair or require high maintenance costs. A water permeability test has been widely used for the evaluation of self-healing performance. However, in the self-healing performance test method, the initial crack width of the concrete greatly affects on the self-healing performance but it does not have a consistent standard. Therefore, in this study, the correlation between crack and permeability and that between time and permeability were analyzed based on crack width and permeability. In addition, since the initial crack width measured by optical microscope is not reliable, the value is derived from the Poiseuille flow and the tendency of time-permeability and time-crack width are analyzed.

최근 자기치유 재료에 대한 연구는 보수하기 힘들거나, 보수비용이 많이 소요되는 구조물에 대해 구조물 스스로 손상을 치유하여 사용수명을 증가시키기 위해 많이 수행되어오고 있다. 현재 널리 사용되고 있는 자기치유 평가 방법으로는 투수시험이 있다. 하지만, 자기치유 평가 방법에서 자기치유 성능은 콘크리트의 초기 균열 폭에 큰 영향을 받지만 일관된 기준을 가지고 있지 않은 실정이다. 따라서, 본 연구에서는 기존 연구에서 사용한 균열 폭과 투수량을 기반으로 균열 폭-투수량의 상관관계와 시간-투수량의 상관관계를 분석하였다. 또한, 광학현미경을 이용하여 측정한 초기 균열 폭은 신뢰성이 떨어지므로 Poiseuille flow에서 ${\alpha}$값을 도출하여 시간-균열 폭에 대한 상관관계를 분석하여 시간-투수량과 시간-균열 폭에 대한 경향을 분석하였다.

Keywords

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