| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Thermal Properties of High-strength Concrete with Laser Flash Analysis at Cryogenic Temperatures |
| YANG Haitao1,2,3, DUAN Pinjia4, WU Ruidong1,2,3, LIU Juanhong1,2,3, LOU Baichuan1,2,3, LUO Kun1,2,3
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1 College of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2 Beijing Key Laboratory of Urban Underground Space Engineering, University of Science and Technology Beijing, Beijing 100083, China;
3 State Key Laboratory of High-efficient Mining and Safety of Metal Mines, Ministry of Education, University of Science and Technology Beijing, Beijing 100083, China;
4 China National Offshore Oil and Gas Group Co., Ltd., Beijing 100028, China |
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Abstract The thermal properties are key factors affecting the safety and operating efficiency of all-concrete LNG storage tank. However, the thermal properties of concrete at cryogenic temperatures are still unclear. The performance of a new type of cryogenic temperature resistant high-performance concrete (CHC) was evaluated in this paper. The pore structure, heat flow behavior, mechanical and thermal properties of CHC at cryo-genic temperatures were investigated. The results showed that the volume of capillary pores and air pores and the total porosity of CHC matrix were less than that of C60 concrete. At cryogenic temperatures, the heat flow curve of CHC matrix reached its peak at -36 ℃. The height of heat flow peak, specific heat capacity, thermal diffusivity, and thermal conductivity of CHC matrix were less than that of C60 concrete. When the temperature decreased from 25 ℃ to -90 ℃, the peak stress value, elastic modulus, and thermal diffusion coefficient of CHC matrix and C60 concrete increased; while the specific heat capacity and thermal conductivity decreased. The mechanical properties of CHC and the thermal properties of CHC matrix are superior to C60 concrete at cryogenic temperature.
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Published: 24 July 2020
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| Fund:This work was financially supported by the National Natural Science Foundation of China (51834001, 51678049). |
About author:: Haitao Yangreceived his M.S. degree in June 2013 from Wuhan University of Technology. From September 2016 to now, he learned at the University of Science and Technology Beijing, focusing on the research of cryogenic temperature concrete and the self-healing of high-performance concrete.
Ruidong Wuhas been studying for a doctor’s degree in University of Science and Technology Beijing since 2015. His main research direction is green high-performance concrete.
Juanhong Liuis currently a professor in University of Science and Technology Beijing. Her research interests are as follows: high-performance civil engineering structural materials; new concrete materials and their life analysis; the research and application of mine fil-ling materials. |
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2020, Vol. 34 
