Advances in concrete construction

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Corrosion of rebar in carbon fiber reinforced polymer bonded reinforced concrete

  • Bahekar, Prasad V. (Department of Applied Mechanics, Visvesvaraya National Institute of Technology) ;
  • Gadve, Sangeeta S. (Department of Applied Mechanics, Visvesvaraya National Institute of Technology)
  • Received : 2018.07.28
  • Accepted : 2019.06.06
  • Published : 2019.12.25
⟨ Previous Next ⟩

Abstract

Several reinforced concrete structures that get deteriorated by rebar corrosion are retrofitted using Carbon Fiber Reinforced Polymer (CFRP). When rebar comes in direct contact with CFRP, rebar may corrode, as iron is more active than carbon. Progression of corrosion of rebar in strengthened RC structures has been carried out when rebar comes in direct contact with CFRP. The experimentation is carried out in two phases. In phase I, corrosion of bare steel bar is monitored by making its contact with CFRP. In phase II, concrete specimens with surface bonded CFRP were casted and subjected to the realistic exposure conditions keeping direct contact between rebar and CFRP. Progression of corrosion has been monitored by various parameters: Half-cell potential, Tafel extrapolation and Linear Polarisation Resistance. On termination of exposure, to find residual bond stress between rebar and concrete, pull-out test was performed. Rebar in contact with CFRP has shown substantially higher corrosion. The level of corrosion will be more with more area of contact.

Keywords

References

  1. ACI Committee 222 (2002), Protection of metal in concrete against corrosion, ACI 222R-01, American Concrete Institute, Farmington Hills, 8.
  2. ACI Committee 440 (2008), Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures, (ACI 440.2R), American Concrete Institute, Farmington Hills, 12-15.
  3. Al-Tayyib, A.H.J. and Khan, S. (1988), "Corrosion rate measurements of reinforcing steel in concrete by electrochemical techniques", Mater. J. Am. Concrete Inst., 85(3), 172-177.
  4. Almutlaq, F.M. (2014), "The influence of EAF dust on resistivity of concrete and corrosion of steel bars embedded in concrete", Adv. Concrete Constr., 2(3), 163-176. https://doi.org/10.12989/acc.2014.2.3.163
  5. Andion, L.G., Garces, P., Cases, F., Andreu, C.G. and Vazquez, J.L. (2001), "Metallic corrosion of steels embedded in calcium aluminate cement mortars", Cement Concrete Res., 31(9), 1263-1269. https://doi.org/10.1016/S0008-8846(01)00572-5
  6. Arup, H. and Crane, A.P. (1983), Corrosion of Reinforcement in Concrete Construction, The Society of Chemical Industry, Chichester, London, UK.
  7. ASTM G1-90 (1999), Standard Practice for Preparing, Cleaning, and Evaluating Corrosion Test Specimens, American Society for Testing and Materials, West Conshohocken, 20.
  8. Attari, N., Amziane, S. and Chemrouk, M. (2012), "Flexural strengthening of concrete beams using CFRP, GFRP and hybrid FRP sheets", Constr. Build. Mater., 37, 746-757. https://doi.org/10.1016/j.conbuildmat.2012.07.052
  9. Baggio, D., Soudki, K. and Noel, M. (2014), "Strengthening of shear critical RC beams with various FRP systems", Constr. Build. Mater., 66, 634-644. https://doi.org/10.1016/j.conbuildmat.2014.05.097
  10. Broomfield, J.P. (2007), Corrosion of Steel in Concrete: Understanding, Investigation and Repair, Taylor & Francis, 2nd Edition, Great Britain.
  11. Dean, Jr. S.W. (1977), "Electrochemical methods of corrosion testing", Paper, Electrochemical Techniques for Corrosion, National Association of Corrosion Engineers, Houston, 52-60.
  12. Dehwah, H.A.F., Maslehuddin, M. and Austin, S.A. (2002), "Long-term effect of sulfate ions and associated cation type on chloride-induced reinforcement corrosion in Portland cement concretes", Cement Concrete Compos., 24(1), 17-25. https://doi.org/10.1016/S0958-9465(01)00023-3
  13. El-Gelany, M.A. (2001), "Short-term corrosion rate measurement of OPC and HPC reinforced concrete specimens by electrochemical techniques", Mater. Struct., 34(7), 426-432. https://doi.org/10.1007/BF02482289
  14. Erdogdu, S., Bremner, T.W. and Kondratova, I.L. (2001), "Accelerated testing of plain and epoxy-coated reinforcement in simulated seawater and chloride solutions", Cement Concrete Res., 31(6), 861-867. https://doi.org/10.1016/S0008-8846(01)00487-2
  15. Gadve, S., Mukherjee, A. and Malhotra, S.N. (2009), "Corrosion of steel reinforcements embedded in FRP wrapped concrete", Constr. Build. Mater., 23(1), 153-161. https://doi.org/10.1016/j.conbuildmat.2008.01.008
  16. Gadve, S., Mukherjee, A. and Malhotra, S.N. (2011), "Active protection of fiber-reinforced polymer-wrapped reinforced concrete structures against corrosion", Corros., 67(2), 025002-1.
  17. Gonzalez, J.A., Molina, A., Escuder, M.L. and Andrade, C. (1985), "Errors in the electrochemical evaluation of very small corrosion rates-I. polarization resistance method applied to corrosion of steel in concrete", Corros. Sci., 25(10), 917-930. https://doi.org/10.1016/0010-938X(85)90021-6
  18. IS 10262 (2009), Concrete Mix Proportioning-Guidelines, IS 10262: 2009, Bureau of Indian Standards, New Delhi, India.
  19. IS2770 (Part I) (1967), Methods of Testing Bond in Reinforced Concrete Part 1 Pull-Out Test, (IS: 2770 (Part I) - 1967), Bureau of Indian Standards, New Delhi, India.
  20. Kumutha, R., Vaidyanathan, R. and Palanichamy, M.S. (2007), "Behaviour of reinforced concrete rectangular columns strengthened using GFRP", Cement Concrete Compos., 29(8), 609-615. https://doi.org/10.1016/j.cemconcomp.2007.03.009
  21. Malerba, P.G., Sgambi, L., Ielmini, D. and Gotti, G. (2017), "Influence of corrosive phenomena on bearing capacity of RC and PC beams", Adv. Concrete Constr., 5(2), 117-143. https://doi.org/10.12989/acc.2017.5.2.117
  22. Mietz, J., Elsener, B. and Polder, R. (1998), Corrosion of Reinforcement in Concrete. Monitoring, Prevention and Rehabilitation, The Institute of Materials Minerals and Mining.
  23. Neville, A.M. and Brooks, J.J. (2010), Concrete Technology, Pearson Education Limited, England, 2nd Edition, 270-271.
  24. Pan, J.L., Xu, T. and Hu, Z.J. (2007), "Experimental investigation of load carrying capacity of the slender reinforced concrete columns wrapped with FRP", Constr. Build. Mater., 21(11), 1991-1996. https://doi.org/10.1016/j.conbuildmat.2006.05.050
  25. Pradhan, B. and Bhattacharjee, B. (2009), "Performance evaluation of rebar in chloride contaminated concrete by corrosion rate", Constr. Build. Mater., 23(6), 2346-2356. https://doi.org/10.1016/j.conbuildmat.2008.11.003
  26. Saricimen, H., Mohammad, M., Quddus, A., Shameem, M. and Barry, M.S. (2002), "Effectiveness of concrete inhibitors in retarding rebar corrosion", Cement Concrete Compos., 24(1), 89-100. https://doi.org/10.1016/S0958-9465(01)00030-0
  27. Song, H.W. and Saraswathy, V. (2007), "Corrosion monitoring of reinforced concrete structures-a", Int. J. Electrochem. Sci, 2, 1-28.
  28. Stern, M. and Geary, A.L. (1957), "Electrochemical polarization I. A theoretical analysis of the shape of polarization curves", J. Electrochem. Soc., 104(1), 56-63. https://doi.org/10.1149/1.2428496
  29. Stern, M. and Weisert, E.D. (1959), "Experimental observations on the relation between polarization resistance and corrosion rate", Proc. American. Society of Testing Materials, 59, 1280.
  30. Sumathi, A. and Arun, V.S. (2017), "Study on behavior of RCC beams with externally bonded FRP members in flexure", Adv. Concrete Constr., 5(6), 625-638. https://doi.org/10.12989/ACC.2017.5.6.625
  31. Tavakkolizadeh, M. and Saadatmanesh, H. (2001), "Galvanic corrosion of carbon and steel in aggressive environments", J. Compos. Constr., 5(3), 200-210. https://doi.org/10.1061/(ASCE)1090-0268(2001)5:3(200)
  32. Torres-Acosta, A.A. (2002), "Galvanic corrosion of steel in contact with carbon-polymer composites. II: Experiments in concrete", J. Compos. Constr., 6(2), 116-122. https://doi.org/10.1061/(ASCE)1090-0268(2002)6:2(116)
  33. Uhlig, H.H. and King, C.V. (1972), "Corrosion and corrosion control", J. Electrochem. Soc., ECS, 119(12), 327C-327C. https://doi.org/10.1149/1.2404108
  34. Wagner, C. and Traud, W. (1938), "On the interpretation of corrosion processes through the superposition of electrochemical partial processes and on the potential of mixed electrodes", Zeitschrift fur Electrochemie, ZEELA, 44, 391.
  35. Yari, M. (2017), "Galvanic corrosion of metals connected to carbon fiber reinforced polymers", April 18, 2017.
  36. Zhao, X., Gong, P., Qiao, G., Lu, J., Lv, X. and Ou, J. (2011), "Brillouin corrosion expansion sensors for steel reinforced concrete structures using a fiber optic coil winding method", Sensor. Basel, Switzerland, 11, 10798-10819. https://doi.org/10.3390/s111110798
  37. Zhou, H., Liang, X., Wang, Z., Zhang, X. and Xing, F. (2017), "Bond deterioration of corroded steel in two different concrete mixes", Struct. Eng. Mech., 63(6), 725-734. https://doi.org/10.12989/sem.2017.63.6.725