Journal of the Korea Institute of Building Construction (한국건축시공학회지)

The Korean Institute of Building Construction (한국건축시공학회)
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Self Healing System for Concrete Surface Crack using Polymer based Coating Agent Incorporating Microencapsulated Healing Agent

마이크로캡슐을 함유한 폴리머 코팅제의 콘크리트 표면균열 자기치유시스템

  • Shin, Ki-Su (Department of Architectural Engineering, Kangwon National University) ;
  • Ryu, Byung-Chul (Department of Architectural Engineering, Kangwon National University) ;
  • Wang, Xiao-Yong (Department of Architectural Engineering, Kangwon National University) ;
  • Park, Ki-Bong (Department of Architectural Engineering, Kangwon National University)
  • Received : 2015.07.10
  • Accepted : 2015.10.26
  • Published : 2015.12.20
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Abstract

In this paper, microencapsulated healing agent was embedded in the polymer matrix to obtain self healing properties. Microencapsulation of methacrylate using polyurea-formaldehyde as a shell material and studied the effect of agitation rate on capsule characteristics such as size, shell thickness, and surface morphology. The formation of microcapsules was confirmed by FTIR and TGA, and capsule characteristics were studied by optical microscopy and SEM. The self-healing effect was evaluated using permeability measurements and further confirmed by surface analytical tools including optical microscope. According to the experimental results, the microencapsulated healing system has the self-heaing ability for artificial cracks.

자기치유성능을 가지고 있는 자기치유제를 함유하고 있는 마이크로 캡슐을 콘크리트 표면의 고분자 매트릭스층에 적용하였다. 메타크릴레이트를 코어물질로 하고 폴리 우레아포름알데히드를 캡슐막 구성물질로 하는 미세캡슐을 고분자 매트릭스 안에 첨가하여 콘크리트 표면에 코팅하였다. 콘크리트 표면에 미세균열이 형성되고 전파될 때, 균열이 전파되는 위치에 있는 캡슐이 파괴되어 치유체가 균열면 사이로 흘러나오게 되고, 균열에 스며든 단량체가 햇빛에 의해 중합반응을 일으켜 균열이 자기치유 되는 현상을 고찰한다. 자기치유성능평가는 흡수성, 투수성 실험 및 광학현미경을 통한 관찰로 확인하였다. 결과적으로 제시된 자기치유시스템은 콘크리트 균열부의 부분적인 복원을 위해 사용할 수 있음을 확인하였다.

Keywords

References

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