Journal of Industrial Technology (산업기술연구)

Kangwon National University, Institute of Industrial Technology (강원대학교 산업기술연구소)
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Early-Age and Restrained Shrinkage of Very-Early Strength Latex Modified Concrete

초속경 라텍스개질 콘크리트의 초기수축 및 구속건조수축

  • 최판길 (강원대학교 대학원 토목공학과) ;
  • 김용곤 (대상엔지니어링(주)) ;
  • 심도식 (강원도립대학 건설시스템과) ;
  • 이봉학 (강원대학교 토목공학과)
  • Published : 2005.02.28
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Abstract

Recently, very-early strength latex-modified concrete(below ; VES-LMC) has been developed for repairing and overlaying the old concrete bridge deck. VES-LMC provides the advantage of very-early-strength, as well as high flexural strength, bond strength, durability, resistance to corrosion, reduced water permeability and resistance to damage from freeze-thaw cycles. The compressive and flexural strength of VES-LMC are 21 MPa and 4.5 MPa at 3 hours after concrete placing, respectively. However, VES-LMC would have a relatively large shrinkage at early-age because of reduced water-cement ratio, big water self-dissipation, and rapid hydration reaction. Therefore, the purpose of this study was to evaluate the early-age and restrained shrinkage of VES-LMC, having an experimental variables such as latex contents and cement types. The latex contents included 0%, 5%, 10%, 15% and 20%, and the cement types included ordinary portland cement and very-early strength cement.

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