收稿日期: 2019-03-18
网络出版日期: 2019-06-11
基金资助
上海市建委基金资助项目(17Z44225)
xperimental analysis and calculation of a hydration heat model for concrete
Received date: 2019-03-18
Online published: 2019-06-11
李东, 张晔琛 . 混凝土水化放热模型的实验分析和计算[J]. 上海大学学报(自然科学版), 2021 , 27(4) : 795 -802 . DOI: 10.12066/j.issn.1007-2861.2181
Owing to the temperature field generated by early-hydration heat, mass concrete causes temperature stress cracking, affecting structural safety and normal use. The accuracy of the thermal parameters of concrete affects the accuracy of the concrete temperature-field calculations. Based on the hydration reaction of cementitious materials in concrete, theory of chemical reaction kinetics, and experimental data for cement hydration heat from different fly ash additives, a formulation of the hydration heat model for concrete was developed, considering the effects of fly ash and temperature. The model could accurately predict the heat release and temperature rise of the concrete hydration reaction with age, and the prediction results were in good agreement with the experimental data.
Key words： mass concrete; temperature field; hydration heat; fly ash
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