Test Study on Interfacial Bonding Behavior of UHPC-NC in a Chloride Environment

被引：1
|
作者：
Xie J. [1 ,2 ,3 ]
Yang Y. [1 ,2 ]
Chen Y. [4 ]
Yang R. [1 ,2 ]
机构：
[1] School of Civil Engineering, Tianjin University, Tianjin
[2] Key Laboratory of Coast Civil Structure Safety of Ministry of Education, Tianjin University, Tianjin
[3] Beijing Engineering Research Center of Existing Building Renovation(Tianjin Branch), Tianjin
[4] Shanghai Architectural Design and Research Institute Co.，Ltd., Shanghai
来源：
Tianjin Daxue Xuebao (Ziran Kexue yu Gongcheng Jishu Ban)/Journal of Tianjin University Science and Technology | 2024年 / 57卷 / 01期
基金：
中国国家自然科学基金;
关键词：
bond-slip model; chloride environment; interface treatment; interfacial bonding behavior; normal concrete; ultra-high performance concrete;
D O I：
10.11784/tdxbz202211027
中图分类号：
学科分类号：
摘要：
A chloride environment is a commonly used chemical attack environment. Investigating the interfacial durability between ultra-high performance concrete(UHPC)and normal concrete(NC)in a chloride environment is essential for potential engineering applications of UHPC reinforced concrete structures and UHPC-NC composite structures. Consequently，the effects of dry-wet cycles(0，25，and 50)，salt immersion days(0，50，and 100 d)，and different treatment methods(brushing，water-jet，and roughed with retarders)on the bonding strength，bonding stiffness，and bond-slip relationships were obtained based on push-out test results of UHPC-NC specimens in conventional and chloride environments. The results show that the loss rate of bonding strength caused by dry-wet cycles and salt immersion is not more than 20% during the test period of 100 d. In addition，the increased duration in a chloride environment leads to a decrease in bonding stiffness. With the increase in interface roughness，the bonding strength and bonding stiffness of UHPC-NC specimens，as well as the interfacial resistance to salt immersion，increase. Influenced by the interface treatment，the load-slip curves of UHPC-NC specimens in a chloride environment show two forms，corresponding to smooth interface(brushing)and other interfaces(water-jet and roughed with retarders). Before the load reached the peak，the bond-slip curves of each specimen were found to be consistent. After the peak value，the former has a load-holding section after a sudden drop in load，whereas the latter has a load-decreasing section with the increase of the slip. Finally，a bond-slip model was proposed based on the characteristics of UHPC-NC bond-slip curves. © 2024 Tianjin University. All rights reserved.
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页码：11 / 20
页数：9
相关论文
共 34 条
  • [1] Wu Zhangyu, Yu Hongfa, Ma Haiyan, Et al., Calculating the service life of high volume slag concrete structure based on reliability in ocean splash area[J], Materials Reports, 33, 2, pp. 264-270, (2019)
  • [2] Xie J, Fu Q H, Yan J B., Compressive behaviors of concrete stub columns with SFRCC jacket under cold-region marine environments[J], Journal of Cold Regions Engineering, 34, 3, (2020)
  • [3] Li Jun, Gao Peiwei, Liu Hongwei, Et al., Study on concrete resistance to chloride salt corrosion under full soaking and wet-dry cycling condition[J], Journal of Nanjing University of Science and Technology, 41, 5, pp. 666-670, (2017)
  • [4] Zhu Jiong, Zhang Lianying, Et al., Mechanical properties of concrete mixed with mineral admixture after chloride corrosion[J], Journal of Shenyang Jianzhu University(Natural Science), 30, 5, pp. 863-869, (2014)
  • [5] Yu Hongfa, Sun Wei, Wang Jiachun, Et al., On attack product and corrosion mechanism of ordinarily concrete after long-term exposure to salt lakes[J], Journal of the Chinese Ceramic Society, 31, 5, pp. 434-440, (2003)
  • [6] Kusumawardaningsih Y，, Fehling E，, Ismail M., UHPC compressive strength test specimens：Cylinder or cube? [J], Procedia Engineering, 125, pp. 1076-1080, (2015)
  • [7] Wang Junyan, Guo Junyuan, Xiao Rucheng, Et al., Study on crack control mechanism of strain-hardening ultra-high performance concrete, China Civil Engineering Journal, 50, 11, pp. 10-17, (2017)
  • [8] Wang Junyan, Bian Chen, Et al., Restrained shrinkage behavior in ring test of ultra high performance concrete with different tensile properties, China Journal of Highway and Transport, 32, 9, pp. 115-123, (2019)
  • [9] Yoo D Y，, Banthia N，, Yoon Y S., Flexural behavior of ultra-high-performance fiber-reinforced concrete beams reinforced with GFRP and steel rebars[J], Engineering Structures, 111, pp. 246-262, (2016)
  • [10] Kim M J，, Kim S，, Lee S K，, Et al., Mechanical properties of ultra-high-performance fiber-reinforced concrete at cryogenic temperatures[J], Construction and Building Materials, 157, pp. 498-508, (2017)
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