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Computers and Concrete Volume 19, Number 6, June 2017 , pages 659-666 DOI: https://doi.org/10.12989/cac.2017.19.6.659 |
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An improvement on the concrete exothermic models considering self-temperature duration |
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Zhenyang Zhu, Weimin Chen, Sheng Qiang, Guoxin Zhang and Youzhi Liu
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| Abstract | ||
| Based on the Arrhenius equations, several hydration exothermic models that precisely calculate the influence of concrete\'s self-temperature duration on its hydration exothermic rate have been presented. However, the models\' convergence is difficult to achieve when applied to engineering projects, especially when the activation energy of the Arrhenius equation is precisely considered. Thus, the models\' convergence performance should be improved. To solve this problem and apply the model to engineering projects, the relationship between fast iteration and proper expression forms of the adiabatic temperature rise, the coupling relationship between the pipe-cooling and hydration exothermic models, and the influence of concrete\'s self-temperature duration on its mechanical properties were studied. Based on these results, the rapid convergence of the hydration exothermic model and its coupling with pipe-cooling models were achieved. The calculation results for a particular engineering project show that the improved concrete hydration exothermic model and the corresponding mechanical model can be suitably applied to engineering projects. | ||
| Key Words | ||
| hydration exothermic behaviors; self-temperature duration; concrete mechanical properties; convergence; coupling | ||
| Address | ||
| Zhenyang Zhu, Guoxin Zhang and Youzhi Liu: State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, 100038, P.R. China Weimin Chen: Hydrochina Huadong Engineering Corporation, Hangzhou, 310014, P.R. China Sheng Qiang: College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, 210098, P.R. China | ||