Environmental impact on the durability of FRP reinforcing bars

Duo, Yongyu and Liu, Xiaogang and Liu, Yue and Tafsirojjaman, T. ORCID: https://orcid.org/0000-0002-4801-6744 and Sabbrojjaman, Md (2021) Environmental impact on the durability of FRP reinforcing bars. Journal of Building Engineering, 43:102909. pp. 1-20. ISSN 2352-7102

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Abstract

Fiber reinforced polymer (FRP) bars are being widely used in civil engineering applications to replace steel bars due to their excellent durability. Existing research on the durability of FRP bars mainly focuses on glass fiber reinforced polymer (GFRP) and basalt fiber reinforced polymer (BFRP) bars. Different conclusions have been drawn due to differences in fibers, resins, fiber volume fractions, solution concentrations, and aging temperatures adopted by researchers. Some results are even contradictory, especially between relatively recent and previous studies. In this paper, data of 557 experiments on tensile strength and elastic modulus of GFRP and BFRP bars exposed to different harsh environments are collected from existing literature, and the durability of GFRP and BFRP bars in the water, acid, salt, and alkali solutions are investigated. Different influence factors are considered including the matrix type, fiber volume fraction and exposure temperature, etc. Furthermore, a new prediction model for the long-term performance of FRP bars is developed based on an existing model and the data collected in this paper. The tensile strength of GFRP and BFRP bars degenerates faster in alkali, and water environments, followed by acid solution, and has the best durability in salt solutions. Except the water solution, GFRP bars show better corrosion resistance than BFRP bars in alkali, salt, and acid solution. The new prediction is simple in form and clear in the physical meaning and can be considered for both GFRP and BFRP bars.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 02 Aug 2021 01:44
Last Modified: 02 Aug 2021 01:44
Uncontrolled Keywords: GFRP bars; BFRP bars; durability; harsh environment; tensile strength; elastic modulus; prediction model
Fields of Research (2008): 09 Engineering > 0905 Civil Engineering > 090599 Civil Engineering not elsewhere classified
09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
Fields of Research (2020): 40 ENGINEERING > 4005 Civil engineering > 400599 Civil engineering not elsewhere classified
40 ENGINEERING > 4005 Civil engineering > 400510 Structural engineering
40 ENGINEERING > 4016 Materials engineering > 401602 Composite and hybrid materials
40 ENGINEERING > 4005 Civil engineering > 400505 Construction materials
Identification Number or DOI: https://doi.org/10.1016/j.jobe.2021.102909
URI: http://eprints.usq.edu.au/id/eprint/42988

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