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采用有限差分方法,建立了基于混凝土绝热温升试验的早龄期混凝土温度场计算模型。模型中,温度对水泥水化及其放热量的影响通过等效龄期法进行了修正。同时,采用数字式温湿度传感器实验测定了强度等级C40、C80混凝土板一维传热条件下的早龄期温度发展数据。模型计算结果与实验测定结果对比表明,二者吻合良好。模型可用于早龄期混凝土结构温度场的计算。
Using finite difference method, the calculation model of temperature field of early age concrete based on concrete adiabatic temperature rise test was established. In the model, the effect of temperature on cement hydration and its heat release was corrected by the equivalent age method. At the same time, the digital temperature and humidity sensor experiment was used to measure the development of early age temperature under the one-dimensional heat transfer condition of C40 and C80 concrete slabs. The comparison between the model calculation and experimental results shows that the two agree well. The model can be used to calculate the temperature field of early age concrete structures.