Modeling the Corrosion Rate of Steel Reinforcement in FRP-Wrapped Concrete
Publication: Journal of Composites for Construction
Volume 20, Issue 3
Abstract
A model to predict the corrosion rate of steel reinforcing bars in fiber-reinforced polymer (FRP) wrapped concrete columns is presented. A model proposed by the author to predict the reinforcement corrosion rate and cracking of the concrete cover due to diffusion of chloride ions and oxygen in concrete members is modified to predict the corrosion rate of reinforcing bars inside FRP-wrapped columns. As corrosion progresses and rust layers build up, oxygen has to diffuse through three different layers to be consumed in the cathodic reaction: the FRP wrap, the concrete cover, and the rust layer. As the rust layer thickness increases, the corrosion rate decreases until it reaches a very slow steady-state descent. The predicted corrosion rate is compared with experimental results reported in the literature. Initially, the model proposed previously by the author was used to predict the corrosion rate of an unwrapped pile to calibrate parameters such as the diffusion coefficient of oxygen with experimental data reported in the literature. Subsequently, the modified model was used to predict the corrosion rate of reinforcing steel in an FRP-wrapped column. The model yields very good agreement with experimental results reported in the literature.
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References
Bae, S., and Belarbi, A. (2009). “Effects of corrosion of steel reinforcement on RC columns wrapped with FRP sheets.” J. Perform. Constr. Facil., 20–31.
Baiyasi, I. M., and Harichandran, R. S. (2001). “Corrosion and wrap strains in concrete bridge columns repaired with FRP wraps.” Proc., (CD-ROM), 80th Annual Meeting of the Transportation Research Board, Transportation Research Board, Washington, DC.
Bazant, Z., and Thonguthai, W. (1978). “Pore pressure and drying of concrete at high temperature.” J. Eng. Mech. Div., 104(5), 1059–1079.
Bazant, Z., and Thonguthai, W. (1979). “Pore pressure in heated concrete walls: Theoretical prediction.” Mag. Concr. Res., 31(107), 67–76.
Bhagava, K., Ghosh, A. K., Mori, Y., and Ramanujam, S. (2005). “Modeling of time to corrosion-induced cover cracking in reinforced concrete structures.” J. Cem. Concr. Res., 35(11), 2203–2218.
Boulfiza, M., Sakai, K., Banthia, N., and Yoshida, H. (2003). “Prediction of chloride ions ingress in uncracked and cracked concrete.” ACI Mater. J., 100(1), 38–48.
Castellote, M., Alonso, C., Andrade, C., Chadbourn, G. A., and Page, C. L. (2001). “Oxygen and chloride diffusion in cement pastes as a validation of chloride diffusion coefficients obtained by steady-state migration test.” Cem. Concr. Res., 31(4), 621–625.
Guzman, S., Gálvez, J. C., and Sancho, J. M. (2011). “Cover cracking of reinforced concrete due to rebar corrosion induced by chloride penetration.” Cem. Concr. Res., 41(8), 893–902.
Jones, D. A. (1992). Principles and prevention of corrosion, MacMillan, New York.
Khoe, C., Sen, R., and Bhethanabotla, V. (2011). “Oxygen permeability of fiber-reinforced polymers.” J. Compos. Constr., 513–521.
Lee, C. (1998). “Accelerated corrosion and repair of reinforced concrete columns using CFRP sheets.” M.E. thesis, Dept. of Civil Engineering, Univ. of Toronto, Toronto.
Martys, S. N., Torquato, S., and Bentz, D. P. (1994). “Universal scaling of fluid permeability for sphere stacking.” Phys. Rev. E, 50(1), 403–408.
Mehta, P., and Monteiro, J. (1993). Concrete, structure, properties, and materials, 2nd Ed., Prentice-Hall, Englewood Cliffs, NJ, 160–164.
Nossoni, G., and Harichandran, R. (2014). “Electrochemical-mechanistic model for concrete cover cracking due to corrosion initiated by chloride diffusion.” J. Mater. Civ. Eng., 04014001.
Pantazopoulou, S. J., Bonacci, J. F., Sheikh, S., Thomas, M. D. A., and Hearn, N. (2001). “Repair of corrosion-damaged columns with FRP wraps.” J. Compos. Constr., 5(1), 3–11.
Richart, F. E., Bradtzaeg, A., and Brown, R. L. (1928). “A study of the failure of concrete under combined compressive stresses.”, Engineering Experimental Station, Univ. of Illinois, Urbana, IL.
Sangeeta, G., Mukherjee, A., and Malhotra, S. (2009). “Corrosion of steel reinforcements embedded in FRP wrapped concrete.” Constr. Build. Mater., 23(1), 153–161.
Sarin, P., Snoeyink, V. L., Lytle, D. A., and Kriven, W. M. (2004). “Iron corrosion scale: Model for scale growth, iron release, and colored water formation.” J. Environ. Eng., 364–373.
Suh, K., Mullins, G., Sen, R., and Winters, D. (2007). “Effectiveness of fiber-reinforced polymer in reducing corrosion in marine environment.” ACI Struct. J., 104(1), 76–83.
Suh, K., Mullins, G., Sen, R., and Winters, D. (2010). “Effective repair for corrosion control using FRP wraps.” J. Compos. Constr., 388–396.
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Published In
Journal of Composites for Construction
Volume 20 • Issue 3 • June 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Jan 29, 2015
Accepted: Jul 29, 2015
Published online: Oct 15, 2015
Discussion open until: Mar 15, 2016
Published in print: Jun 1, 2016
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