| Issue |
MATEC Web Conf.
Volume 358, 2022
3rd International Symposium on Mechanics, Structures and Materials Science (MSMS 2022)
|
|
|---|---|---|
| Article Number | 01036 | |
| Number of page(s) | 4 | |
| DOI | https://doi.org/10.1051/matecconf/202235801036 | |
| Published online | 19 May 2022 | |
Effect of surface insulation on thermal stress of concrete
1 State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research, Beijing, China
2 Key Laboratory of Construction and Safety of Hydraulic Engineering of Ministry of Water Resources, China Institute of Water Resources and Hydropower Research, Beijing, China
3 Department of Structure and Materials, China Institute of Water Resources and Hydropower Research, Beijing, China
4 Huadian Tibet Energy Co., Ltd., Lhasa, China
* Corresponding author: xinjd@iwhr.com
For concrete, the appearance of temperature load due to the hydration heat of cementitious materials is inevitable and important to the structural safety of dam. This paper investigates the effect of different surface insulation measures on the thermal stress of dam concrete by means of finite element simulation calculation. The calculation results show that surface insulation is important for lowering the surface thermal stress of concrete. When the equivalent surface coefficient of heat transfer was less than 3kJ/(m2·h·°C), the surface tensile stress can be decreased by 80%~90% for concrete undergoing diurnal temperature variation and cold wave.
Key words: Mass concrete / Cracking control / Temperature variation / Surface insulation
© The Authors, published by EDP Sciences, 2022
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