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The Effect of Steel-Fiber Contents on the Compressive Stress-Strain Relation of Ultra High Performance Cementitious Composites (UHPCC)

UHPCC의 압축응력-변형률 관계에 대한 강섬유 혼입률의 영향

  • Kang, Su-Tae (Structural Engineering & Bridges Research Division, Korea Institute of Construction Technology) ;
  • Ryu, Gum-Sung (Structural Engineering & Bridges Research Division, Korea Institute of Construction Technology)
  • 강수태 (한국건설기술연구원 구조교량연구실) ;
  • 류금성 (한국건설기술연구원 구조교량연구실)
  • Received : 2010.08.19
  • Accepted : 2010.10.19
  • Published : 2011.02.28

Abstract

The effect of steel-fiber contents on the compressive behavior of ultra high performance cementitious composites (UHPCC) was studied to propose a compressive behavior model for UHPCC. The experiments considered fiber contents of 0~5 vol.% and the results indicated that compressive strength and corresponding strain as well as elastic modulus were improved as the fiber contents increased. Compared to the previous study results obtained from concrete with compressive strength of 100MPa or less, the reinforcement effect on strength showed similar tendency, while the effect on the strain and elastic modulus were much less. Strength, strain, and elastic modulus according to the fiber contents were presented as a linear function of fiber reinforcement index (RI). Fiber reinforcement in UHPCC had no influence on the shape of compressive behavioral curve. Considering its effect on compressive strength, strain, and elastic modulus, a compressive stress-strain relation for UHPCC was proposed.

Acknowledgement

Supported by : 한국건설기술연구원, 한국에너지기술평가원

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