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 Performance Concrete Designed with the Various Blaine of Cement, Mineral Admixture Types and Fiber Contents

시멘트 입도, 혼화재 종류 및 PP섬유 혼입률 변화에 따른 고성능 콘크리트의 폭렬특성

  • 송용원 (청주대학교 대학원) ;
  • 신재경 (청주대학교 대학원) ;
  • 이재삼 (두산산업개발(주) 기술연구소) ;
  • 한창평 ((주)한성종합기술단건축사사무소 기술연구소) ;
  • 양성환 (인천전문대학 건축과) ;
  • 한천구 (청주대학교 건축공학부)
  • Published : 2006.11.18
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Abstract

This study investigates spalling properties of 60MPa class, high performance concrete, made with the various influential parameters, such as, blaine of cement, mineral admixture and polypropylene(PP) fiber contents. Totally 21 parameters of ${\phi}100{\times}200mm$ in size was fabricated; three specimens for variance in blaine of cement, 4 specimens for combination of mineral admixture type, along with 0.05, 0.1, 0.15% of fiber adding ratio. After that, one hour unloading fire test was conducted, and then spalling appearance and spalling degree of specimens was examined. Test showed that a specimen made with high blaine of cement(H) improved early strength but exhibited similar value to a specimen made with low blaine(L) at the age of 28 days, thus indicating comparable spalling appearance. In conclusion, spalling easily occur in higher strength and smaller particle shape of cement and mineral admixture.

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