Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
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Effect of Polyvinyl Alcohol Fiber Volume Fraction on Pullout Behavior of Structural Synthetic Fiber in Hybrid Fiber Reinforced Cement Composites

하이브리드 섬유 보강 시멘트 복합 재료에서 구조용 합성 섬유의 인발 거동에 미치는 폴리비닐 알코올 섬유 혼입률의 효과

  • Lee, Jin-Hyung (Dept. of Rural Construction Engineering, Kongju National University) ;
  • Park, Chan-Gi (Dept. of Rural Construction Engineering, Kongju National University)
  • 이진형 (공주대학교 지역건설공학과) ;
  • 박찬기 (공주대학교 지역건설공학과)
  • Received : 2011.01.24
  • Accepted : 2011.05.16
  • Published : 2011.08.31
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Abstract

In this study, the effect of polyvinyl alcohol (PVA) fiber volume fraction on the pullout behavior of structural synthetic fiber in hybrid structural synthetic fiber and PVA fiber cement composites are presented. Pullout behavior of the hybrid fiber cement composites and structural synthetic fiber were determined by dog-bone bond tests. Test results found that the addition of PVA fiber can effectively enhance the structural synthetic fiber cement based composites pullout behavior, especially in fiber interface toughness. Pullout test results of the structural synthetic fiber showed the interface toughness between structural synthetic fiber and PVA fiber reinforced cement composites increases with the volume fraction of PVA fiber. The microstructural observation confirms the incorporation of PVA fiber can effectively enhance the interface toughness mechanism of structural synthetic fiber and PVA fiber reinforced cement composites.

이 연구에서는 하이브리드 구조용 합성 섬유와 폴리비닐알코올(PVA)섬유 보강 시멘트 복합 재료에 정착된 구조용 합성 섬유의 인발 거동에 미치는 PVA 섬유 혼입률의 효과를 제시하였다. 구조용 합성 섬유와 하이브리드 섬유보강 시멘트 복합 재료와의 인발 거동은 Dog-bone 부착 시험에 의해서 결정하였다. 시험 결과 PVA 섬유의 혼입은 구조용 합성 섬유와 시멘트 복합 재료와의 인발 거동 특히, 섬유 계면인성을 강화하는 효과가 있었다. 구조용 합성 섬유의 인발 시험 결과 구조용 합성 섬유와 시멘트 복합 재료와의 계면인성은 PVA 섬유의 혼입률이 증가할수록 증가하였다. 미세 구조 분석 결과 PVA 섬유의 혼합은 구조용 합성 섬유와 PVA 섬유 보강 시멘트 복합 재료의 계면인성 메커니즘을 강화시키는데 효과적이라는 것을 확인할 수 있었다.

Keywords

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