Test and analysis on hydration of concrete three-cell box girder

被引：0
作者：
Yu Y. [1 ]
Zhang F. [2 ]
Zhang L. [3 ]
Liu J. [2 ]
机构：
[1] School of Civil Engineering, Shandong University, Jinan
[2] Geotechnical and Structural Engineering Research Center, Shandong University, Jinan
[3] School of Transportation, Southeast University, Nanjing
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2022年 / 52卷 / 06期
关键词：
concrete; hydration; response surface analysis; temperature; three-cell box girder;
D O I：
10.3969/j.issn.1001-0505.2022.06.003
中图分类号：
学科分类号：
摘要：
To study the hydration heat distribution of concrete within 96 h of the casting of a three-cell box girder, a concrete box girder scale down model was cast. 258 temperature sensors were embedded in the concrete. Photoelectric radiation sensors and wind speed sensors were arranged. A temperature field test model considering solar radiation was established. The results show that the maximum temperature and the maximum vertical temperature difference of the three-cell box girder both occur at the haunch with the maximum temperature of 71. 2 °C and the maximum temperature difference of the whole section reaching 25. 6 °C. Based on response surface analysis and numerical simulation, the thickness of the top geotextile is an important influencing factor for the vertical temperature difference of the two webs, and a prediction equation for the maximum vertical temperature difference of different webs is proposed. Compared with the working condition with an initial concrete temperature of 35 °C and without geotextile cover, an initial concrete temperature of 15 °C and an 8mm geotextile cover can reduce the vertical temperature difference between the side webs and the middle webs to 22. 1% and 24.7% under the original working condition, respectively. © 2022 Southeast University. All rights reserved.
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页码：1043 / 1051
页数：8
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