에트링가이트-석회 복합계 팽창재의 수화반응 모델화

Hydration Model of Ettringite-Gypsum Type Expansive Additive

  • 박선규 (연세대학교 사회환경시스템 공학부) ;
  • 야구귀문 (동경대학교 대학원 건축공학) ;
  • 송하원 (연세대학교 사회환경시스템 공학부) ;
  • 김무한 (충남대학교 건축공학과)
  • 발행 : 2004.11.01

초록

In recent years, some attention was particularly given to cracking sensitivity of high performance concrete. It has been argued and demonstrated experimentally that such concrete undergoes autogenous shrinkage due to self-desiccation at early age, and, as a result, internal tensile stress may develop, leading to micro cracking and macro cracking. One possible method to reduce cracking due to autogenous shrinkage is the addition of expansive additive. Tests conducted by many researches have shown the beneficial effects of addition of expansive additive for reducing the risk of shrinkage-introduced cracking. However, the research on hydration model of expansion additive has been hardly researched up to now. This paper presents a study of the hydration model of Ettringite-Gypsum type expansive additive. Result of comparing forecast values with experiment value, proposed model is shown to expressible of hydration of expansive additive.

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