Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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The Effect of the Self-Healing Microcapsules on the Quality and Healing Properties of Cement Composites

자기치유 마이크로캡슐이 시멘트 복합재료의 품질 및 치유특성에 미치는 영향

  • Kim, Cheol-Gyu (Department of Civil Engineering, Semyung University) ;
  • Oh, Sung-Rok (Research & Development Team, Newjust Co., Ltd.) ;
  • Kim, Ji-Hun (Department of Construction Engineering, Semyung University) ;
  • Choi, Yun-Wang (Department of Civil Engineering, Semyung University)
  • 김철규 (세명대학교 토목공학과) ;
  • 오성록 ((주)뉴저스트 기술연구소) ;
  • 김지훈 (세명대학교 건설공학과) ;
  • 최연왕 (세명대학교 토목공학과)
  • Received : 2021.08.25
  • Accepted : 2021.09.16
  • Published : 2021.09.30
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Abstract

In this paper, it was evaluated that the effect of self-healing microcapsules on the quality and healing properties of cement composites. In the mixing of microcapsules, the plastic viscosity and yield stress of the cement composites decreased due to the particle properties of the microcapsules, and decreased in proportion to the mixing ratio. The table flow showed a tendency to decrease as the core material acted as a stimulant due to the loss of microcapsules, and the compressive strength could be supplemented through unit quantity correction. As a result of evaluating the effect of microcapsule mixing on the healing properties of cement composites, it was found that the unit water flow rate decreased by the healing reaction immediately after crack initiation. When more than 3% of microcapsules were mixed, it was found that there was a healing rate of more than 95% at 7 days of healing age.

본 논문에서는 자기치유 마이크로캡슐이 시멘트 복합재료의 품질 및 치유특성에 미치는 영향을 평가하였다. 마이크로캡슐의 혼합은 마이크로캡슐의 입자 특성에 의하여 시멘트 복합재료의 소성점도 및 항복응력이 감소하며, 혼합율에 비례하여 감소하였다. 테이블 플로우는 손실량에 의한 코어재료가 자극제 역할을 함에 따라 감소하는 경향이 나타났으며, 압축강도는 배합수 보정을 통하여 강도보완이 가능하였다. 마이크로캡슐 혼합이 시멘트 복합재료의 치유 특성에 미치는 영향을 평가한 결과, 균열개시 이후 즉시 치유반응에 의하여 단위투수량이 감소되는 결과가 나타났으며, 마이크로캡슐 3% 이상 혼합할 경우 치유재령 7일에 95% 이상의 치유율이 있는 것으로 나타났다.

Keywords

Acknowledgement

본 연구는 2021년 국토교통과학기술진흥원 국토교통기술연구 개발사업(21SCIP-C159051-02) 지원사업으로 이루어졌으며, 이에 감사드립니다.

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