DOE OSTI · 23206218
Cement hydration kinetics study in the temperature range from 15 °C to 95 °C
Abstract
The heat evolution during the hydration of cement was examined by multiple calorimetric methods: isothermal, oscillating isothermal, as well as temperature scanning tests in the temperature range from 15 °C to 95 °C. The apparent activation energy (E{sub a}) of several different types of cements were all found to decrease significantly with temperature. Type of additives and water to cement ratio had little influence on the temperature dependence of E{sub a}. The correlation between E{sub a} and temperature may be mathematically simplified to a step function, where E{sub a} is a nonzero constant below a critical temperature (T{sub cr}) and reduces to zero above that temperature. The proposed model of E{sub a} was combined with a scale factor model to simulate the influence of curing temperature on the hydration kinetics of cement with significantly improved accuracy compared to an earlier model.
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Pang, Xueyu, Sun, Lijun, Sun, Fang, Zhang, Ge, Guo, Shenglai, Bu, Yuhuan. 2021-10-15. Cement hydration kinetics study in the temperature range from 15 °C to 95 °C. https://doi.org/10.1016/j.cemconres.2021.106552
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