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Damage Behavior of Ultra-High Performance Concrete under Load-Temperature Coupling
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Zhiyong LIU1, 2, Xizhi XIA3, Yunsheng ZHANG1, 2, Jinyang JIANG1, 2
Journal of the Chinese Ceramic Society | 2021, 49(6) : 1238 - 1246
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Journal of the Chinese Ceramic Society | 2021, 49(6): 1238-1246
Damage Behavior of Ultra-High Performance Concrete under Load-Temperature Coupling
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Zhiyong LIU1, 2, Xizhi XIA3, Yunsheng ZHANG1, 2, Jinyang JIANG1, 2
Affiliations
  • 1.Jiangsu Key Laboratory for Construction Materials, Southeast University, Nanjing 211189, China
  • 2.School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
  • 3.School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China

    • LIU Zhiyong(1985-), male, Ph.D., Professor. E-mail:

About Author:

LIU Zhiyong(1985-), male, Ph.D., Professor. E-mail:

Published: 2021-06-20 doi: 10.14062/j.issn.0454-5648.20200477
Outline
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The damage of ultra-high performance concrete (UHPC) under load-temperature coupling was evaluated by using the indexes of ultrasonic pulse velocity, mass loss rate, bulk density and thermal conductivity. The results show that the ultrasonic pulse velocity (UPV) of UHPC decreases, and the damage increases gradually with the increase of load. The temperature has little effect on the UHPC damage and the UPV fluctuates at 4.55 km/s. The bulk density decreases slightly with the increase of load and temperature, i.e., only 0.73% and 1.80%, respectively, at a stress ratio of 0.5 and a temperature of 90℃. The test results of mass loss rate show the similar regularity. Load and temperature both have a greater influence on the thermal conductivity of UHPC. The thermal conductivity decreases with the increase of the increase of load and temperature. At 3 d, the thermal conductivity of UHPC in the presence of a stress ratio of 0.5 is decreased by 21.80%, compared to that in the absence of load, and the thermal conductivity of UHPC at 90℃ is decreased by 14.90%, compared to that at 30℃. A meso model of thermal conductivity of the UHPC under load-temperature coupling was proposed based on the assumption that the thermal conductivity of solid phase in UHPC could increase linearly with increasing saturation and eliminate the effects of load and temperature on the UHPC porosity. It is indicated that the theoretical values calculated by the model could be in reasonable agreement with the measured data.

ultra-high performance concrete  /  load-temperature  /  damage  /  ultrasonic pulse velocity  /  durability
刘志勇, 夏溪芝, 张云升, 蒋金洋. 荷载-温度耦合作用下超高性能混凝土的损伤行为. 硅酸盐学报, 2021 , 49 (6) : 1238 -1246 . DOI: 10.14062/j.issn.0454-5648.20200477
Zhiyong LIU, Xizhi XIA, Yunsheng ZHANG, Jinyang JIANG. Damage Behavior of Ultra-High Performance Concrete under Load-Temperature Coupling[J]. Journal of the Chinese Ceramic Society, 2021 , 49 (6) : 1238 -1246 . DOI: 10.14062/j.issn.0454-5648.20200477
Appendix
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Year 2021 volume 49 Issue 6
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Article Info
doi: 10.14062/j.issn.0454-5648.20200477
  • Receive Date：2020-06-29
  • Online Date：2026-10-30
  • Published：2021-06-20
Article Data
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History
  • Received：2020-06-29
  • Revised：2020-08-06
Funding
Affiliations
    1.Jiangsu Key Laboratory for Construction Materials, Southeast University, Nanjing 211189, China
    2.School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
    3.School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China

Corresponding:

JIANG Jinyang(1974-), male, Ph.D., Professor. E-mail:
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表12种不同金属材料的力学参数
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小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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