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混凝土中水泥水化反应放热模型及其应用
引用本文:凌道盛,许德胜,沈益源. 混凝土中水泥水化反应放热模型及其应用[J]. 浙江大学学报(工学版), 2005, 39(11): 1695-1698
作者姓名:凌道盛  许德胜  沈益源
作者单位:凌道盛(浙江大学 建筑工程学院,浙江 杭州 310027)
许德胜(浙江大学 建筑工程学院,浙江 杭州 310027)
沈益源(1.浙江大学 建筑工程学院,浙江 杭州 310027;2.中国水利水电第十二工程局,浙江 杭州 310004)
摘    要:大体积混凝土结构水化热温度场分析的关键是混凝土中水泥水化反应放热模型的确定。基于化学反应动力学原理,提出了一种物理意义明确,考虑了温度和化学反应物浓度对化学反应速率影响的混凝土中水泥水化反应放热模型,并将其应用于有限元分析。算例分析表明,该模型能很好地拟合了混凝土绝热温升的实测数据,较精确地预测了在不同浇筑温度下混凝土绝热温升的变化规律。

关 键 词:水泥水化反应  水化热  绝热温升  大体积混凝土  有限元方法
文章编号:1008-973X(2005)11-1695-04
收稿时间:2004-05-21
修稿时间:2004-05-21

Model for hydration heat of cement in concrete and its application
LING Dao-sheng,XU De-sheng,SHEN Yi-yuan. Model for hydration heat of cement in concrete and its application[J]. Journal of Zhejiang University(Engineering Science), 2005, 39(11): 1695-1698
Authors:LING Dao-sheng  XU De-sheng  SHEN Yi-yuan
Affiliation:1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310027, China ; 2. The 12th Engineering Bureau of Sinohydro, Hangzhou 310004, China
Abstract:The key of temperature field analysis in massive concrete is the model for hydration heat of cement.Based on the theory of chemical reaction kinetics,a new model was proposed to simulate the hydration heat of cement in concrete.The model takes the influences of temperature and reactant concentration into account,and each parameter in the model has definite physical meaning.The model can be easily applied to finite element analysis.Numerical simulation indicates that the model not only can fit well the temperature obtained from the concrete adiabatic temperature rise experiment,but also can give accurate estimate of the temperature-time relationship under different curing temperature.
Keywords:hydrated reaction of cement  hydration heat  adiabatic temperature rise  massive concrete  finite element method
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