Flexural Properties of Ultra-high Performance Concrete Under Different Temperatures

被引：0
|
作者：
Fang Z. [1 ,2 ]
Liu S. [1 ]
Huang Z. [1 ]
Chen J. [1 ]
机构：
[1] College of Civil Engineering, Hunan University, Changsha
[2] Key Laboratory for Wind and Bridge Engineering of Hunan Province, Hunan University, Changsha
来源：
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2020年 / 48卷 / 11期
关键词：
Deformability; Ductility index; Flexural strength; Low temperature; Ultra-high performance concrete;
D O I：
10.14062/j.issn.0454-5648.20200227
中图分类号：
学科分类号：
摘要：
The bending properties of ultra-high performance concrete (UHPC) at ambient and low temperatures (i.e., 20℃ and -20℃) were investigated. The results show that the strength and elastic modulus of UHPC increase with decreasing the temperature, and the strength increases more significantly than the elastic modulus. Compared to the corresponding results at 20℃, the cubic compressive strength, the prism compressive strength, the splitting tensile strength, the flexural cracking strength, the flexural limit strength and the elastic modulus of UHPC at -20℃ are increased by 7.3%, 8.0%, 10.8%, 13.7%, 9.0% and 4.1%, respectively. The flexural deformability and ductility of UHPC decrease with decreasing the temperature. Compared to the corresponding results at 20℃, even though the initial crack strain of UHPC at -20℃ is increased by 6.3%, resulting from that the flexural cracking strength of UHPC increases more significantly than its elastic modulus, and the peak strain, limit strain, residual strain and ductility index of UHPC at -20℃ are decreased by 2.9%, 8.2%, 5.5% and 6.4%, respectively. © 2020, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.
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页码：1732 / 1739
页数：7
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