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A Study of Characteristics Change of Low-Shrinkage Normal Strength Concrete According to Mixing Factors and curing Temperature

배합요인과 양생온도에 따른 일반강도 초저수축 콘크리트의 특성 변화 연구

  • Jeong, Jun-Young (Research Institute for Engineering & Technology, Chungcheong University) ;
  • Min, Kyung-Hwan (Research Institute for Engineering & Technology, Chungcheong University) ;
  • Lee, Dong-Gyu (Research Institute for Engineering & Technology, Chungcheong University) ;
  • Choi, Hong-sik (Department of Civil Engineering, Chungcheong University)
  • 정준영 (충청대학교 공학기술연구원) ;
  • 민경환 (충청대학교 공학기술연구원) ;
  • 이동규 (충청대학교 공학기술연구원) ;
  • 최홍식 (충청대학교 토목과)
  • Received : 2016.05.09
  • Accepted : 2016.07.07
  • Published : 2016.07.31

Abstract

This study examined the effects of the coarse aggregate maximum size and grading of fine aggregates to acquire the characteristics of very low shrinkage on normal strength concrete mixed in the field. In addition, the shrinkage characteristics of concrete under construction were evaluated in accordance with the curing temperature. The compressive strength and drying shrinkage tests were performed for nine mixing factors composed of the coarse aggregate size (13, 20, and 25 mm), types of fine aggregate (see sand, crushed sand, and blended sand), and curing temperatures (5, 20, and $35^{\circ}C$). To acquire low shrinkage properties under $350{\mu}{\varepsilon}$ strain on normal strength concrete, a 25 mm maximum of coarse aggregate was available, and the grading of fine aggregate affected the shrinkage of concrete. In addition, very low shrinkage properties were acquired in the curing temperature range except cold and hot weather concrete.

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