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.
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.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2005年第11期1695-1698,共4页
Journal of Zhejiang University：Engineering Science
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
hydrated reaction of cement
hydration heat
adiabatic temperature rise
massive concrete
finite element method
作者简介
凌道盛（1968-）,男,安徽黄山人,教授,从事地基处理与计算土力学研究.E-mail：dsling@ccea.zju.edu.cn
