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Spatting and Fire Enduring Properties of High Strength RC Column Subjected to Axial Load Depending on Fiber Contents

중심 축하중을 받는 고강도 RC기둥의 섬유 혼입량에 따른 폭열 및 내화 성상

  • Han, Cheon-Goo (Dept. of Architectural Engineering, Chongju University) ;
  • Hwang, Yin-Seong (Dept. of Architectural Engineering, Chongju University) ;
  • Lee, Jae-Sam (Dept. of RC Research & Development, Doosan Industrial Development Co., LTD.) ;
  • Kim, Kyoung-Min (Dept. of RC Research & Development, Doosan Industrial Development Co., LTD.)
  • 한천구 (청주대학교 건축공학과) ;
  • 황인성 (청주대학교 건축공학과) ;
  • 이재삼 (두산산업개발(주) RC연구개발팀) ;
  • 김경민 (두산산업개발(주) RC연구개발팀)
  • Published : 2006.02.28

Abstract

This paper investigates experimentally the fire resistance performance and spatting resistance of high performance reinforced concrete column member subjected to fire containing polypropylene fiber(PP fiber) and cellulose fiber(CL fiber). An increase in PP fiber and CL fiber contents, respectively resulted in a reduction of fluidity due to fiber ball effect. Air content is constant with m increase in fiber content. Compressive strength reached beyond 50 MPa. Based on fire resistance test, severe failure occurred with control concrete specimen, which caused exposure of reinforcing bar. No spall occurred with specimen containing PP fiber. This is due to the discharge of internal vapour pressure. Use of CL fiber superior to control concrete in the side of spatting resistance, localized failure at comer of specimen was observed. Corner of specimen had deeper neutralization than surface of specimen. Specimen containing PP fiber had the least damaged area due to spatting. Neutralization depth ranged between 6 and 8 mm Residual compressive strength of specimen containing PP fiber maintained 40%, which is larger than control concrete with 20% of residual strength. Specimen containing CL fiber had 25% or residual strength.

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Cited by

  1. State-of-the-Art Research and Experimental Assessment on Fire-Resistance Properties of High Strength Concrete vol.18, pp.3, 2014, https://doi.org/10.11112/jksmi.2014.18.3.028