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부순모래를 사용한 초고강도 콘크리트의 공학적 특성에 관한 연구

A Study on the Engineering Properties of Ultra High-Strength Concrete Utilizing Crushed Sand

  • 이상수 (한밭대학교 공과대학 건축공학과) ;
  • 노형남 (한밭대학교 공과대학 건축공학과) ;
  • 송하영 (한밭대학교 공과대학 건축공학과)
  • 발행 : 2008.08.25

초록

Recently, the demand of ultra high-rise building is on the increase in korea due to the rapidly changing movement in economic growth and the expansion of national infrastructure. At the same time, the tendency toward the amount used of concrete has greatly increased every year. In addition, as the seriousness of quantity demanded of aggregate is gathering strength, the active areas of research proceeds to do actively in every place in order to review the usability of crushed sand as a part of the countermeasures. And, it needs to establish the quality standard and service guide, etc. for the practical use. Accordingly, this study was to establish the ratio of water-binder materials as three levels like 23.5, 27.5, and 31.5%, and the replacement ratio as three levels like 0, 50, and 100% in order to define the engineering properties of ultra high-strength concrete using the crushed sand. This study was to examine it after establishing the combined condition by the substitute of the fine aggregate percentage and admixture. From the result of this research above, it may be summed up as follows. 1) The more the replacement ratio of crushed sand and the ratio of water-binder materials increased, the mon the fluidity decreased due to the decrease of irregular grain shape of sand and unit combined discretion. 2) This study found out that 100% of replacement ratio of crushed sand was almost similar level to the compressive strength of concrete using the natural sand.

키워드

참고문헌

  1. 송하영 외, 부순모래를 사용한 초고강도콘크리트의 유동특성 및 강도특성에 관한 실험적 연구, AIK 추계학술발표 논문집 제26권2호(통권 제51집), 2006.10
  2. 오병환 외, 부순모래 및 부순모래 콘크리트, KCI, 1998
  3. 이상수 외, 부순모래 대체율에 따른 고강도콘크리트의 유동특 성 및 강도특성에 관한 연구, KCI 가을학술발표논문집 제18 권2호(통권 제35집)
  4. 이상수 외, 초고강도 콘크리트의 특성에 미치는 물-결합재비 및 부순모래 치환율의 영향에 관한 실험적 연구, KCI 봄학술 발표 논문집 제19권1호, 2007.5
  5. 한천구 외, 국내 콘크리트용 부순모래의 사용실태에 관한 조사연구 AIK. 2005.11
  6. W. J. Weiss, W. Yang and S. P. Shah., Factors Influencing Durability and Early-Age Cracking in High-Strength Concrete Structures, 1999.

피인용 문헌

  1. Fundamental Physical Properties of Cement Composites Containing Fineness Reject Ash vol.11, pp.4, 2011, https://doi.org/10.5345/JKIBC.2011.11.4.363