Corrosion-Induced Concrete Cracking, Steel-Concrete Bond Loss, and Mechanical Degradation of Steel Bars
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.
F. Tang et al., "Corrosion-Induced Concrete Cracking, Steel-Concrete Bond Loss, and Mechanical Degradation of Steel Bars," Proceedings of the 4th International Conference on Structures and Building Materials (2014, Guangzhou, China), vol. 919-921, pp. 1760-1770, Trans Tech Publications, Mar 2014.
The definitive version is available at http://dx.doi.org/10.4028/www.scientific.net/AMR.919-921.1760
4th International Conference on Structures and Building Materials (2014: Mar. 15-16, Guangzhou, China)
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Corrosion; Cracking; Pullout Bond; Chlorine Compounds; Concrete Beams And Girders; Crack Initiation; Normal Distribution; Reinforced Concrete; Accelerated Corrosion; Corroded Steel Bars; Corrosion-Induced Deterioration; Cross Section Distributions; Cross Sectional Area; Mechanical Degradation; Residual Cross-Section; Bars (Metal)
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Article - Conference proceedings
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