A Calculation of Theoretical Temperature Rise of Concrete by One-Dimensional Difference Method Considering Cement Hydration

XIE Wen; TIAN Feng; ZHOU Chongxu; CAO Haiming; YANG Kunkun; WANG Xin; YUAN Zhongxia; CHEN Hao

doi:10.13204/j.gyjzG23030409

Volume 53 Issue 10

Oct. 2023

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2023 > 53(10): 126-134

Xie Qiang, Zhao Liang. DAMAGE IDENTIFICATION OF FRAME STRUCTURES BASED ON MODAL SENSITIVITY ANALYSIS——NUMERICAL SIMULATION AND TEST VERIFICATION[J]. INDUSTRIAL CONSTRUCTION, 2005, 35(12): 94-96. doi: 10.13204/j.gyjz200512026

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XIE Wen, TIAN Feng, ZHOU Chongxu, CAO Haiming, YANG Kunkun, WANG Xin, YUAN Zhongxia, CHEN Hao. A Calculation of Theoretical Temperature Rise of Concrete by One-Dimensional Difference Method Considering Cement Hydration[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(10): 126-134. doi: 10.13204/j.gyjzG23030409

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A Calculation of Theoretical Temperature Rise of Concrete by One-Dimensional Difference Method Considering Cement Hydration

doi: 10.13204/j.gyjzG23030409

1. China Nuclear Huachen Construction Engineering Co., Ltd., Xi'an 712000, China;
2. School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
3. Western Civil Engineering Research Center of Disaster Prevention and Mitigation, Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China

Received Date: 2023-03-04
Available Online: 2023-12-18

Abstract

Abstract

Due to the uneven distribution of the temperature field inside the concrete, mass concrete is prone to produce temperature cracks of varying degrees. These temperature cracks often directly affect the construction quality of concrete and the structural safety of buildings. Therefore, it is particularly important to accurately estimate the temperature field of mass concrete, which can provide effective basis and measures for the control of temperature cracks. However, traditional one-dimensional difference method does not take into consideration the fact that thermal parameters of concrete change with the hydration reaction of cementitious materials, which makes some disparities between the calculated result and the actual temperature. Incorporating thermal parameters changes during cement hydration, a phase adjustment coefficient of thermal parameters was proposed. Based on one-dimensional difference method, a new method for calculating theoretical temperature of mass concrete by incorporating the cement hydration and periodic variation law of ambient temperature was proposed. Through the comparison and analysis of the results from mass concrete cube temperature test, it showed that the proposed method could more accurately reflect the maximum temperature at the center of concrete and the time when the maximum temperature occurred.
- one-dimensional difference method,
- cement hydration,
- thermal parameters,
- environmental temperature changes,
- mass concrete

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References

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