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准确描述混凝土的绝热温升规律是有效计算混凝土温度场和有效控制混凝土温差及温度应力的基础。本文基于不同初始温度下常态混凝土和不同配合比下碾压混凝土的绝热温升试验结果,对比研究了双曲模型、指数模型和复合指数模型描述绝热温升规律的适用性和准确性。结果表明,对于常态混凝土与碾压混凝土,复合指数模型效果均为最佳;对于常态混凝土,指数模型优于双曲模型;而对于碾压混凝土,双曲模型优于指数模型。
Accurate description of the law of concrete adiabatic temperature rise is effective calculation of concrete temperature field and effective control of concrete temperature and temperature stress basis. Based on the experimental results of adiabatic temperature rise of RCC under different initial temperatures and different mix ratios, the applicability and accuracy of the hyperbolic, exponential and composite index models to describe the adiabatic temperature rise are contrasted. The results show that composite index model is the best for normal concrete and roller compacted concrete. Exponential model is better than hyperbolic model for normal concrete. Hyperbolic model is superior to exponential model for roller compacted concrete.