Prediction of Long-Term Performance and Durability of BFRP Bars under the Combined Effect of Sustained Load and Corrosive Solutions

Unlike carbon-fiber-reinforced polymer (CFRP) bars and the maturely developed glass FRP (GFRP) bars, the long-term performance of the newly developed basalt-fiber reinforced polymer (BFRP) bars under severe environmental conditions remains unclear. This paper evaluates the residual tensile properties of unstressed and stressed BFRP bars exposed to four types of simulated harsh environments: alkaline solution, salt solution, acid solution, and de-ionized water at 25, 40, and 55°C. Microstructural analysis using scanning electronic microscopy (SEM) was also conducted to reveal the inherent degradation mechanism of BFRP bars in alkaline environment. The residual tensile strength of unstressed BFRP bars exposed to alkaline solution was used for long-term performance prediction based on Arrhenius theory. The results showed that the effect on the durability of BFRP bars exposed to acid, salt, and deionized water was less than that for bars exposed to alkaline solution. The effects of sustained stress on the degradation of BFRP bars were not obvious when the stress level was less than 20% of the ultimate strength, but if the stress exceeded this level, the degradation processes were accelerated. The predicted exposure time required for a reduction in strength of 50% at a mean annual temperature of 5.7°C in alkaline solution, which represents an area with a northern latitude of 50°, was estimated at approximately 16.1 years for the 6-mm BFRP bar.

• Record URL:
  https://doi.org/10.1061/(ASCE)CC.1943-5614.0000517
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/10900268
• Supplemental Notes:
  • © 2014 American Society of Civil Engineers.
• Authors:
  • Wu, Gang
  • Dong, Zhi-Qiang
  • Wang, Xin
  • Zhu, Ying
  • Wu, Zhi-Shen
• Publication Date: 2015-6

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 04014058
• Serial:
  • Journal of Composites for Construction
  • Volume: 19
  • Issue Number: 3
  • Publisher: American Society of Civil Engineers
  • ISSN: 1090-0268
  • EISSN: 1943-5614
  • Serial URL: http://ascelibrary.org/journal/jccof2

Subject/Index Terms

• TRT Terms: Corrosion resistance; Durability; Fiber reinforced polymers; Reinforcing bars; Seawater; Tensile strength; Weather conditions
• Uncontrolled Terms: Scanning electron microscopy
• Subject Areas: Bridges and other structures; Construction; Highways; I53: Construction of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01536656
• Record Type: Publication
• Files: TRIS, ASCE
• Created Date: Sep 2 2014 9:09AM