Interfacial performance of aramid, basalt and carbon fiber reinforced polymer bonded concrete exposed to high temperature

被引：48
|
作者：
Zhou, Ao [1 ]
Qiu, Qiwen [2 ]
Chow, Cheuk Lun [2 ]
Lau, Denvid [2 ,3 ]
机构：
[1] Harbin Inst Technol, Sch Civil & Environm Engn, Shenzhen 518055, Peoples R China
[2] City Univ Hong Kong, Dept Architectural & Civil Engn, Hong Kong, Peoples R China
[3] MIT, Dept Civil & Environm Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA
来源：
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2020年 / 131卷
关键词：
Aramid fibers; Carbon fibers; High-temperature properties; Interface; FRP PLATED CONCRETE; CFRP-WOOD COMPOSITE; MECHANICAL-PROPERTIES; FIRE; STRENGTH; BEHAVIOR; RESISTANCE; MOISTURE; SYSTEMS; BEAMS;
D O I：
10.1016/j.compositesa.2020.105802
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Externally bonding fiber reinforced polymer (FRP) is an effective approach to strengthen/retrofit concrete structures. However, little is known on bond performance of FRP-bonded concrete under high temperature, impeding the application of FRP in buildings potentially subjected to fire. In this paper, the bond performance of aramid, basalt and carbon FRP-concrete subjected to high temperature (80-300 degrees C) has been investigated through acoustic-laser technique, macroscale fracture tests and microscale characterization. Results have shown that the deterioration percentages of both peel and shear interface fracture toughness of aramid FRP-bonded concrete are largest under high temperature, followed by carbon FRP-bonded concrete and basalt FRP-bonded concrete. The mechanisms behind different bond performance have been revealed with variations of microscale morphology and chemical decomposition. The results and findings can provide a fair comparison of thermal susceptibility and residual bond performance of various FRP-bonded systems, and contribute to designing FRP strengthening/retrofitting systems under high temperature.
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页数：11
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