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Mechanical Properties of Concrete Pavement by Low Fraction of Macro Fiber

매크로 섬유의 저혼입에 따른 콘크리트 포장의 역학적 특성

  • 최성용 (한국건설기술연구원 인프라구조연구실) ;
  • 박영환 (한국건설기술연구원 인프라구조연구실) ;
  • 정우태 (한국건설기술연구원 인프라구조연구실) ;
  • 박종섭 (한국건설기술연구원 인프라구조연구실)
  • Received : 2012.02.02
  • Accepted : 2012.09.12
  • Published : 2012.12.17

Abstract

PURPOSES : The purpose of the study was to examine dynamic features of concrete after mixing a little macro fiber with small aspect ratio and long length utilized for bridge, tunnel and shotcrete for tensile performance and crack control in domestic/overseas countries with cement concrete pavement mix. METHODS : Coarse aggregates with small aspect ratio and macro fibers with maximum length of approximately 32 mm are introduced in small quantities in the mix proportions of concrete pavement so as to prevent loss of the workability. Then, this study intends to evaluate the applicability of macro fibers in the mix proportions of concrete pavement by examining the basic construction performance, as well as the change of toughness, the equivalent bending strength and the flexural toughness index caused by compression, bending, tension and the flexural stress-displacement curve. RESULTS : As the results, in each kind of macro fiber, polyvinyl alcohol fiber and steel fiber displayed a good performance. CONCLUSIONS : In 0.2 and 0.3% of fiber contents, it is appeared that polyvinyl alcohol fiber has a large effect on improvement of tensile performance and steel fiber on improvement of deforming performance of bending stress.

Keywords

References

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