Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Healing Performance of Concrete Containing Hybrid Self-healing Materials

하이브리드 자기치유 소재를 혼입한 콘크리트의 치유성능

  • Mih-ho, Hwang (Self-healing green concrete research center, Sungkyunkwan University) ;
  • Hyuk, Kwon (WITH M-TECH Co., Ltd.) ;
  • Hyung-Suk, Kim (Department of Civil, Architectural and Environmental System Engineering, Sungkyunkwan University) ;
  • Sung, Choi (Self-healing green concrete research center, Sungkyunkwan University) ;
  • Kwang-Myong, Lee (Department of Civil, Architectural and Environmental System Engineering, Sungkyunkwan University)
  • 황민호 (성균관대학교 자기치유 친환경 콘크리트 연구센터) ;
  • 권혁 ((주)위드엠텍 기술연구소) ;
  • 김형석 (성균관대학교 건설환경시스템공학과) ;
  • 최성 (성균관대학교 자기치유 친환경 콘크리트 연구센터) ;
  • 이광명 (성균관대학교 건설환경시스템공학과)
  • Received : 2022.11.18
  • Accepted : 2022.12.15
  • Published : 2022.12.30
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Abstract

In this study, the healing performance of hybrid self-healing concrete was investigated by mixing bacterial pellets(BP) and solid phase capsules(SC), respectively, based on organic-inorganic self-healing material(MC). Constant water head permeability test was applied as a method of evaluating the healing performance, and the healing rate and the healed crack width calculated by the equivalent crack width were used as evaluation indicies. As a result of the water permeability test, when the initial crack width was 0.3 mm, the healing rates of MC-BP and MC-SC were 2.1~3.0 %pt higher than that of MC, and the healed crack width of hybrid concrete increased by 0.017~0.018 mm. In conclusion, it was found that the self-healing performance was not significantly improved even if the two types of healing materials are used together.

본 연구에서는 유·무기계 자기치유재료를 기반으로 박테리아 펠렛과 고상캡슐을 각각 혼입하여 사용한 하이브리드 자기치유 콘크리트의 치유성능을 조사하였다. 치유성능 평가방법으로 정수위 투수시험을 적용하였으며, 평가지표로 치유율과 등가균열폭에 의해 산출된 치유된 균열폭을 활용하였다. 정수위 투수시험 결과 초기 균열폭이 0.3 mm일 때 MC-BP와 MC-SC의 치유율은 MC와 비교하여 2.1~3.0 %pt 높았으며, 하이브리드 콘크리트의 치유된 균열폭은 0.017~0.018 mm 증가하였다. 결론적으로, 두 가지 치유소재를 함께 사용하더라도 자기치유 성능은 크게 향상되지 않은 것으로 나타났다.

Keywords

Acknowledgement

본 연구는 국토교통부 건설기술연구산업의 연구비 지원(22SCIP-C158976-03)에 의해 수행되었습니다.

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