한국콘크리트학회:학술대회논문집 (Proceedings of the Korea Concrete Institute Conference)

한국콘크리트학회 (Korea Concrete Institute)
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설계강도 120MPa 초고강도 콘크리트의 초기재령 자기수축 특성 연구

Autogenous and Drying Shrinkage Behavior of Ultra-High-Strength Concrete at Early Ages

  • 김지원 (고려대학교 사회환경시스템공학과) ;
  • 손유신 (삼성물산(주)건설부문 기술연구소) ;
  • 이주하 (고려대학교 사회환경시스템공학과) ;
  • 김규동 (삼성물산(주)건설부문 기술연구소) ;
  • 이승훈 (삼성물산(주)건설부문 기술연구소) ;
  • 윤영수 (고려대학교 사회환경시스템공학과)
  • 발행 : 2004.11.01
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초록

In this study, to investigate autogenous shrinkage behavior of 120MPa UHSC at early ages, free and restrained shrinkage tests are performed for various strength levels(50MPa, 80MPa, 120MPa). For 120MPa, the effect of fly ash on autogenous shrinkage was also investigated. In order to assess the potential for early-age cracking in concrete and a mixtures susceptibility to shrinkage cracking, restrained ring test was carried out. Test results show that autogenous shrinkage of UHSC was much higher than that of HSC, VHSC and fly ash delayed cracking age in UHSC by decreasing autogenous shrinkage.

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