Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
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Evaluation of Crack Control and Permeability of Hydrophilic PVA fiber Reinforced Cement Composite

친수성 PVA 섬유보강 시멘트 복합체의 균열제어 및 투수성 평가

  • Won Jing-Pil (Dept. of Civil and Environmental System Engineering, Kunkuk University) ;
  • Hwang Keum-Sik (Dongwon Construction. Co. Ltd, R&D Team) ;
  • Park Chan-Gi (Dept. of Civil and Environmental System Engineering, Kunkuk University) ;
  • Park Hae-Geun (Samsung Corporation, Engineering & Construction Group, Civil Engineering Technology Team)
  • 원종필 (건국대학교 사회환경시스템공학과) ;
  • 황금식 (동원건설(주) 기술개발부) ;
  • 박찬기 (건국대학교 사회환경시스템공학과) ;
  • 박해균 (삼성물산(주) 건설부분 토목사업본부)
  • Published : 2004.06.01
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Abstract

Plastic shrinkage crack occurs at the exposed surfaces of freshly placed concrete due to consolidation of the concrete mass and rapid evaporation of water from the surface. This so-called shrinkage crack is a major concern for concrete, especially for flat structures such as pavements, slabs for industrial factories and retaining walls. This study has been performed to obtain the plastic shrinkage and the permeability of hydrophilic poly vinyl alcohol(PVA) fiber reinforced mortar and concrete. Test results indicated that PVA fiber reinforced cement composite showed an ability to reduce the total crack area and the maximum crack width (as compared to plain and polypropylene fiber reinforced concrete). Also, according to the permeability test result, it was found that PVA fiber reinforced cement composite was more reducing than polypropylene fiber reinforced cement composite.

소성수축 균열은 경화전 콘크리트의 노출된 표면에서 과도한 수분 증발로 인하여 발생된다. 이러한 소성수축 균열은 특히 도로, 슬래브 및 옹벽 등과 같은 넓은 표면적을 가진 콘크리트 구조물에서 발생하는 가장 큰 문제 중에 하나이다. 본 연구에서는 PVA섬유보강 모르타르 및 콘크리트의 소성수축 특성과 투수성능을 파악하기 위해 실험을 실시하였다. 그 결과 PVA섬유보강 시멘트복합체는 일반 시멘트 복합체 및 폴리프로필렌섬유보강 시멘트 복합체와 비교하여 최대 균열 폭 및 총 균열 면적에 효과적으로 감소하였다. 또한 투수성 실험결과 PVA섬유보강 시멘트 복합체는 폴리프로필렌섬유보강 시멘트 복합체보다 더 낮은 투수성을 나타내었다.

Keywords

References

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