Prediction of Long-Term Performance and Durability of BFRP Bars under the Combined Effect of Sustained Load and Corrosive Solutions
Publication: Journal of Composites for Construction
Volume 19, Issue 3
Abstract
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.
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Acknowledgments
Financial support for this research was provided by the National Program on Key Basic Research (Project No. 2012CB026200), the National “Twelfth Five-Year” Plan for Science and Technology (Project Nos. 2011BAB03B09 and 2012BAK24B03), the Natural Science Foundation of Jiangsu Province, China (Project No. BK2010015), and the Fundamental Research Funds for the Central Universities (Project No. CXLXB-100).
References
Al-Salloum, Y., El-Gamal, S., Almusallam, T., Alsayed, S., and Aqel, M. (2013). “Effect of harsh environmental conditions on the tensile properties of GFRP bars.” Composites Part B, 45(1), 835–844.
American Concrete Institute (ACI). (2006). “Guide for the design and construction of concrete reinforced with FRP bars.”, ACI, Farmington Hills, MI.
American Concrete Institute ACI. (2004). “Guide test methods for fiber-reinforced polymers (FRPs) for reinforcing or strengthening concrete structures.”, ACI, Farmington Hills, MI.
ASTM. (2008). “Standard practice for the preparation of substitute ocean water.”, ASTM International, West Conshohocken, PA.
Bank, L. C., Gentry, T. R., Thompson, B. P., and Russel, J. S. (2003). “A model specification for composites for civil engineering structures.” Constr. Build. Mater., 17(6–7), 405–437.
Benmokrane, B., Wang, P., Ton-That, T. M., Rahman, H., and Robert, J.-F. (2002). “Durability of glass fiber-reinforced polymer reinforcing bars in concrete environment.” J. Compos. Constr., 143–153.
Caceres, A, Jamond, R. M., Hoffard, T. A., and Malvar, L. J. (2000). “Accelerated testing of fiber reinforced polymer matrix composites—Test plan.”, Naval Facilities Engineering Service Center, Port Hueneme, CA.
Canadian Standards Association (CSA). (2000). “Canadian highway bridge design code.”, CSA International, Rexdale, ON, Canada.
Canadian Standards Association (CSA). (2002). “Design and construction of building components with fibre reinforced polymers.”, Rexdale, ON, Canada.
Cao, S. H., Wu, Z. S., and Wang, X. (2009). “Tensile properties of CFRP and hybrid FRP composites at elevated temperatures.” J. Compos. Mater., 43(4), 315–330.
Chen, Y., Davalos, J. F., and Ray, I. (2006). “Durability prediction for GFRP reinforcing bars using short-term data of accelerated aging tests.” J. Compos. Constr., 279–286.
Chen, Y., Davalos, J. F., Ray, I., and Kim, H. Y. (2007). “Accelerated aging tests for evaluation of durability performance of FRP reinforcing bars reinforcing bars for concrete structures.” Compos. Struct., 78(1), 101–111.
Davalos, J. F., Chen, Y., and Ray, I. (2012). “Long-term durability prediction models for GFRP bars in concrete environment.” J. Compos. Mater., 46(16), 1899–1914.
Debaiky, A., Nkurunziza, G., Benmokrane, B., and Cousin, P. (2006). “Residual tensile properties of GFRP reinforcing bars after loading in severe environments.” J. Compos. Constr., 370–380.
Dejke, V. (2001). “Durability of FRP reinforcement in concrete—Literature review and experiments.” Thesis for the degree of licentiate of engineering, Chalmers Univ. of Technology, Goteborg, Sweden.
Gonenc, O. (2001). “Durability and service-life prediction of concrete reinforcing materials.” M.S. thesis, Univ. of Wisconsin-Madison, Madison, WI.
Japanese Society of Civil Engineering (JSCE). (1997). “Recommendation for design and construction of concrete structures using continuous fiber reinforcing materials.” Concrete Engineering Series, No. 23, JSCE, Tokyo, Japan.
Kamal, A., and Boulfiza, M. (2011). “Durability of GFRP rebars in simulated concrete solutions under accelerated aging conditions.” J. Compos. Constr., 473–481.
Micelli, F., and Nanni, A. (2004). “Durability of FRP rods for concrete structures.” Constr. Build. Mater., 18(7), 491–503.
Mufti, A., et al. (2005). “Durability of GFRP reinforced concrete in field structures.” Proc., 7th Int. Symp. on Fiber Reinforced Polymer Reinforcement for Reinforced Concrete Structures, American Concrete Institute, Detroit.
Nelson, W. (1990). Accelerated testing—Sustained models, test plans, and data analyses, Wiley, New York.
Nkurunziza, G., Benmokrane, B., Debaiky, A. S., and Masmoudi, R. (2005). “Effect of sustained load and environment on long-term tensile properties of glass fiber-reinforced polymer reinforcing bars.” ACI Struct. J., 102(4), 615–621.
Robert, M., and Benmokrane, B. (2013). “Combined effects of saline solution and moist concrete on long-term durability of GFRP reinforcing bars.” Constr. Build. Mater., 38, 274–284.
Robert, M., Cousin, P., and Benmokrane, B. (2009). “Durability of GFRP bars embedded in moist concrete.” J. Compos. Constr., 66–73.
Robert, M., Cousin, P., Wang, P., and Benmokrane, B. (2010). “Temperature as an accelerating factor for long-term durability testing of FRPS: Should there be any limitations?” J. Compos. Constr., 361–367.
Robert, M., and Fam, A. (2012). “Long-term performance of GFRP tubes filled with concrete and subjected to salt solution.” J. Compos. Constr., 217–224.
Sen, R., Mullins, G., and Salem, T. (2002). “Durability of E-glass/vinyl ester reinforcement in alkaline solution.” ACI Struct. J., 99(3), 369–375.
Shi, J. W., Zhu, H., Wu, G., and Wu, Z. S. (2013). “Tensile behavior of FRP and hybrid FRP sheets in freeze-thaw cycling environments.” Composites Part B, 60, 239–247.
Wu, Z. S., Wang, X., and Iwashita, K. (2010). “Tensile fatigue behaviour of FRP and hybrid FRP sheets.” Composites Part B, 41(5), 396–402.
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© 2014 American Society of Civil Engineers.
History
Received: Feb 25, 2014
Accepted: Jul 9, 2014
Published online: Aug 27, 2014
Discussion open until: Jan 27, 2015
Published in print: Jun 1, 2015
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