An Experimental Study on the Manufacture Ultra-High Strength Concrete of 1800kg/$\textrm{cm}^2$ Compressive Strength (Part I The Experimental Program and Preliminary Experiment)

압축강도 1800kg/$\textrm{cm}^2$의 초고강도콘크리트 개발에 관한 실험적 연구 (제1보 실험계획 및 예비실험)

  • 김규용 (충남대학교 대학원 건축공학과) ;
  • 김진만 (충남대학교 대학원 건축공학과) ;
  • 이상수 (충남대학교 대학원 건축공학과) ;
  • 남상일 (충남대학교 대학원 건축공학과) ;
  • 김무한 (충남대학교 건축공학과)
  • Published : 1994.10.01

Abstract

To reduce the size of structural members, high strength concrete has recently been utilized for structure such as ultra-high-rise buildings and prestressed concrete bridges in North America, and its compressive strength has gone up to 1300kg/$\textrm{cm}^2$. In Japan, research on high-strength concrete has been undertaken on a large scale by the national enterprise so-called New RC Project. And high-strength concrete with a design compressive strength over 450kg/$\textrm{cm}^2$ has recently been employed for high rised reinforced concrete building. As a result of the serious land availability situation of metropolitan areas in the world, buildings will become taller, and even higher strengths will be required. In the future, the utilization of high-strength concrete will spread widely through the development of new structural concepts, application of steels of a higher yield stress, silica fume, and other new materials. Considering these circumstance, the aim of this experimental study is to develop ultra-high-strength concrete with compressive strength over 1800kg/$\textrm{cm}^2$ with domestic current materials. There are so many factors which influence the manufacturing of ultra-high-strength concrete. The experimental factors selected in this study are mixing methods, curing methods, water-binder ratio, maximum size of coarse by silica fume. The results of this experimental study show that it is possible to develop the ultra-high-strength concrete with compressive strength over 1700kg/$\textrm{cm}^2$ at 28days, 1800kg/$\textrm{cm}^2$ at 56 days.

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