Effect of Retarder and W/C on the Autogenous Shrinkage of VES-LMC

지연제와 물-시멘트비가 VES-LMC의 자기수축에 미치는 영향

  • 윤경구 (강원대학교 토목공학과) ;
  • 최판길 (강원대학교 토목공학과) ;
  • 김기헌 (강원대학교 토목공학과, (주)삼우아이엠씨)
  • Published : 2006.05.11

Abstract

Recently, very-early strength latex-modified concrete(below ; VES-LMC) has been developed for repairing and overlaying the old concrete bridge deck. Early-age defects in high-performance concrete due to thermal and autogenous deformation shorten the life cycle of concrete structures. Thus, it is necessary to examine the behavior of early-age concrete at the stages of design and construction. The purpose of this study was to evaluate the autogenous shrinkage of VES-LMC, having an experimental variables such as retarder and water-cement ratio. The greater the retarder content in VES-LMC, the greater the expansion at early-age. This recommend the small retarder content as possible. The effect of water-cement ratio on early-age behavior is very small, because of the wrapped specimen in order to prevent water evaporation.

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