Corrosion-Induced Concrete Cracking, Steel-Concrete Bond Loss, and Mechanical Degradation of Steel Bars

Abstract:

This study experimentally investigated corrosion-induced deterioration in reinforced concrete (RC) structures: concrete cover cracking, steel-concrete bond loss, and mechanical degradation of corroded steel bars. Pullout and RC beam specimens were prepared, subjected to accelerated corrosion in a wet sand bath, and tested under loading. A 3D laser scan was employed to measure the surface profile of corroded steel bars and determine the corrosion effect on the distribution of residual cross section area. The crack width on the concrete surface was sampled randomly and analyzed statistically. Corrosion reduced the bond strength between steel bars and concrete, particularly in the form of corrosion-induced number and width of cracks. Both the yield and ultimate strengths depended upon the critical cross sectional area of steel bars, whereas the elongation changed with the cross section distribution over the length of the steel bars. Corrosion also changed the distribution of the cross sectional area of steel bars. The crack width on the concrete surface can be well represented by a normal distribution regardless of corrosion levels.

• Periodical: Advanced Materials Research (Volumes 919-921)
• Pages: 1760-1770
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.919-921.1760
• Online since: April 2014
• Authors: Fu Jian Tang, Gen Da Chen, Wei Jian Yi
• Keywords: Chloride, Corrosion, Cracking, Pull-Out Bond

References

[1] P. Ghods, O.B. Isgor, G. McRae, T. Miller. The effect of concrete pore solution composition on the quality of passive oxide films on black steel reinforcement. Cement and Concrete Composites, Vol. 31, No. 1 (2009), p.2.

DOI: 10.1016/j.cemconcomp.2008.10.003

[2] X. Feng, Y. Zuo, Y. Tang, X. Zhao, X. Lu. The degradation of passive film on carbon steel in concrete pore solution under compressive and tensile stresses. Electrochimica Acta, Vol. 58 (2011), p.258.

DOI: 10.1016/j.electacta.2011.09.035

[3] H. Yu, K.T.K. Chiang, L. Yang. Threshold chloride level and characteristics of reinforcement corrosion initiation in simulated concrete pore solutions. Construction and Building Materials, Vol. 26, No. 1(2012), p.723.

DOI: 10.1016/j.conbuildmat.2011.06.079

[4] H. Bohni. Corrosion in Reinforced Concrete Structures. Cambridge, UK: Woodhead Publishing, (2005).

[5] K. Asami, M. Kikuchi, In-depth distribution of rusts on a plain carbon steel and weathering steels exposed to coastal-industrial atmosphere for 17 years. Corrosion Science, Vol. 45 (2003), p.2671.

DOI: 10.1016/s0010-938x(03)00070-2

[6] T.D. Marcotte, C.M. Hansson, Corrosion products that form on steel within cement paste. Materials and Structures, Vol. 40 (2007), p.325.

DOI: 10.1617/s11527-006-9170-4

[7] C. Andrade, C. Alonso, and F.J. Molina. Cover Cracking as a Function of Rebar Corrosion: Part I-Experimental Test. Materials and Structures, Vol. 26, No. 8 (1993), p.453.

DOI: 10.1007/bf02472805

[8] M.P. Webster. The Assessment of Corrosion-damaged Concrete Structures, Birmingham: The University of Birmingham. (2000).

[9] C. Fang, K. Lundgren, L. Chen, and C. Zhu. Corrosion Influence on Bond in Reinforced Concrete. Cement and Concrete Research, Vol. 34, No. 11 (2004), p.2159.

DOI: 10.1016/j.cemconres.2004.04.006

[10] C. Fang, K. Lundgren, M. Plos, and K. Gylltoft. Bond Behaviour of Corroded Reinforcing Steel Bars in Concrete. Cement and Concrete Research, Vol. 36, No. 10 (2006), p. (1931).

DOI: 10.1016/j.cemconres.2006.05.008

[11] D. Tang, T.K.C. Molyneaux, D.W. Law, and R. Gravina. Influence of Surface Crack Width on Bond Strength of Reinforced Concrete. ACI Materials Journal, Vol. 108, No. 1 (2011), p.29.

DOI: 10.14359/51664213

[12] H. Yalciner, O. Eren, and S. Sensoy. An Experimental Study on the Bond Strength between Reinforcement Bars and Concrete as a Function of Concrete Cover, Strength and Corrosion Level. Cement and Concrete Research, Vol. 42, No. 5 (2012), p.643.

DOI: 10.1016/j.cemconres.2012.01.003

[13] J. Cairns, G.A. Plizzari, Y. Du, D.W. Law, and C. Franzoni. Mechanical Properties of Corrosion-damaged Reinforcement. ACI Materials Journal, Vol. 102, No. 4 (2005), p.256.

[14] Y.G. Du, L.A. Clark, and A.H.C. Chan. Residual Capacity of Corroded Reinforcing Bars. Magazine of Concrete Research, Vol. 57, No. 3 (2005), p.135.

DOI: 10.1680/macr.2005.57.3.135

[15] Y.G. Du, L.A. Clark, A.H.C. Chan. Effect of corrosion on ductility of reinforcing bars. Magazine of Concrete Research, Vol. 57, No. 7(2005), p.407.

DOI: 10.1680/macr.2005.57.7.407

[16] W. Zhang, X. Song, X. Gu, S. Li. Tensile and fatigue behavior of corroded rebars. Construction and Building Materials, Vol. 34 (2012), p.409.

DOI: 10.1016/j.conbuildmat.2012.02.071