Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
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Prediction of Concrete Compressive Strength by a Modified Rate Constant Model

수정 반응률 상수 모델에 의한 콘크리트 압축강도의 예측

  • 한상훈 (한국과학기술원 토목공학과) ;
  • 김진근 (한국과학기술원 토목공학과) ;
  • 문영호 (산업기술정보원 책임연구원)
  • Published : 2000.04.01
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Abstract

This paper discusses the validity of models predicting the compressive strength of concrete subjected to various temperature histories and the shortcomings of existing rate constant model and apparent activation energy concept. Based on the discussion, a modified rate constant model is proposed. The modified rate constant model, in which apparent activation energy is a nonlinear function of curing temperature and age, accurately estimates the development of the experimental compressive strengths by a few researchers. Also, the apparent activation energy of concrete cured with high temperature decreases rapidly with age, but that of concrete cured with low temperature decreases gradually with age. Finally generalized models to predict apparent activation energy and compressive strength are proposed, which are based on the regression results.

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References

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