Proceedings of the Korean Institute of Building Construction Conference (한국건축시공학회:학술대회논문집)

The Korean Institute of Building Construction (한국건축시공학회)
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Spalling Properties of High Strength Concrete Made with Various Aspect Ratios and Fiber Contents of Nylon Fiber

나일론 섬유의 형상비 및 혼입률 변화에 따른 고강도 콘크리트의 폭렬특성

  • 송용원 (청주대학교 건축공학부) ;
  • 허영선 (청주대학교 산업과학연구소) ;
  • 이성연 (두산건설(주) 기술연구소) ;
  • 한창평 ((주)한성종합기술단건축사사무소 기술연구소) ;
  • 양성환 (인천전문대학 건축과) ;
  • 한천구 (청주대학교 건축공학부)
  • Published : 2007.04.28
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Abstract

This study investigates the spatting properties of high strength concrete, $60\sim80MPa$ class, designed with diverse aspect ratios and fiber content of nylon(NY). Test showed that increase of fiber content and aspect ratio in concrete decreased the fluidity of fresh concrete, especially for 1580 and 3000 aspect ratio of fiber. As for the compressive and tensile strength, adding NY fiber did not significantly affect the values In the range of high strength. After completing the fire test, the specimens containing both 750 and 1000 aspect ratios of fiber protected the spatting occurrence even in 0.05vol.% of fiber content. This specimens indicated the residual compressive strength ratio at 37%, showing the most favorable value among other specimens. Therefore, it is demonstrated that to protect the spalling in high strength concrete considering the effective fluidity, strength and economic efficiency altogether, adding 0.05vol.% of NY fiber with 750 aspect ratio Is beneficial.

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