Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
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A Fundamental Study on the Correlationship between Hydration Heat and Autogenous Shrinkage of High Strength Concrete at an Early Age

초기재령 고강도콘크트의 수화발열과 자기수축 특성의 상관관계에 관한 기초적 연구

  • Kim, Gyu-Yong (Div. of Architecture Engineering, College of Engineering, Chungnam National University) ;
  • Lee, Eui-Bae (Div. of Architecture Engineering, College of Engineering, Chungnam National University) ;
  • Koo, Kyung-Mo (Div. of Architecture Engineering, College of Engineering, Chungnam National University) ;
  • Choi, Hyeong-Gil (Div. of Architecture Engineering, College of Engineering, Chungnam National University)
  • Published : 2008.10.31
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Abstract

In this study, to analyze the correlation between hydration heat and autogenous shrinkage of high strength concrete at an early age, hydration heating velocity and autogenous shrinking velocity as quantitative coefficients which represent the main properties of hydration heat and autogenous shrinkage were proposed. Two coefficients were calculated by statistical analysis and were equal with the regression coefficient. The complemented semi-adiabatic temperature rise test as test method to evaluate the hydration heat and autogenous shrinkage of concrete were proposed. In results of proposed test and analysis method, it was possible that early age properties of hydration heat and autogenous shrinkage of concrete were expressed numerically, and autogenous shrinkage was represented by equation with coefficients of hydration heat.

본 연구에서는 초기재령 고강도콘크리트의 수화발열 및 자기수축 특성의 상관관계를 분석하기 위해 수화발열 및 자기수축의 초기특성을 대표할 수 있는 계수로서 수화발열상승구간 및 자기수축증가구간의 직선 기울기인 수화발열상승속도 및 자기수축증가속도를 설정하였으며, 이 두 계수는 통계적 수법을 활용하여 일정 범위의 결정계수를 갖는 회귀계수로 산정하였다. 또한 수화발열 특성과 자기수축 특성을 동시에 평가하기 위한 시험 방법으로서 기존의 간이단열온도상승시험을 보완한 시험 방법을 제안하였으며, 본 시험 방법을 통해 실험을 실시하여 실측데이터를 분석한 결과, 고강도콘크리트의 수화발열 및 자기수축에 대한 초기재령 특성을 수치적으로 나타내는 것이 가능하였으며 자기수축을 수화발열 특성을 나타내는 계수의 함수식으로 제시하는 것이 가능하였다.

Keywords

References

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