Abstract
An experimental research was conducted to determine the corrosion and bearing capacity of a reinforced concrete (RC) slab at different ages in a marine environment. Results show that the development of corrosion-induced cracks on a slab in a marine environment can be divided into three stages according to crack morphology at the bottom of the slab. In the first stage, cracks appear. In the second stage, cracks develop from the edges to the middle of the slab. In the third stage, longitudinal and transverse corrosion-induced cracks coexist. The corrosion ratio of reinforcements nonlinearly increases with the age, and the relationship between the corrosion ratio of the reinforcements and the corrosion-induced crack width of the concrete is established. The flexural capacity of the corroded RC slab nonlinearly decreases with the age, and the model for the bearing capacity factor of the corroded RC slab is established. The mid-span deflection of the corroded RC slab that corresponds to the yield of the reinforcements linearly increases with the increase in corrosion ratio. Finally, the mechanisms of corrosion morphology and the degradation of the mechanical properties of an RC slab in a marine environment are discussed on the basis of the basic theories of steel corrosion in concrete and concrete structure design.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Al-Hammoud, R., Soudki, K. and Topper, T. H., 2010. Bond analysis of corroded reinforced concrete beams under monotonic and fatigue loads, Cem. Concr. Compos., 32(3): 194–203.
Bian, H. B., 2003. Experimental Investigation and Theoretical Analysis on Corroded R.C. Slabs in Marine Environment, MSc. Thesis, Hohai University, Nanjing, China. (in Chinese)
Chung, L., Najm, H. and Balaguru, P., 2008. Flexural behavior of concrete slabs with corroded bars, Cem. Concr. Compos., 30(3): 184–193.
Kondratova, I. L., Montes, P. and Bremner, T. W., 2003. Natural marine exposure results for reinforced concrete slabs with corrosion inhibitors, Cem. Concr. Compos., 25(4-5): 483–490.
Lv, W. B., 2008. Experimental Investigation and Analysis on 9 Years Corroded R.C. Slabs, MSc. Thesis, Hohai University, Nanjing, China. (in Chinese)
Li, J. B., Gong, J. X. and Wang, L. C., 2009. Seismic behavior of corrosion-damaged reinforced concrete columns strengthened using combined carbon fiber-reinforced polymer and steel jacket, Constr. Build. Mater., 23(7): 2653–2663.
Lee, H. S., Kage, T., Noguchi, T. and Tomosawa, F., 2003. An experimental study on the retrofitting effects of reinforced concrete columns damaged by rebar corrosion strengthened with carbon fiber sheets, Cem. Concr. Res., 33(4): 563–570.
Ma, Y., Che, Y. and Gong, J. X., 2012. Behavior of corrosion damaged circular reinforced concrete columns under cyclic loading, Constr. Build. Mater., 29(4): 548–556.
Sagüés, A. A., Pech-Canul, M. A. and Shahid Al-Mansur, A. K. M., 2003. Corrosion macrocell behavior of reinforcing steel in partially submerged concrete columns, Corros. Sci., 45(1): 7–32.
Saraswathy, V. and Song, H. W., 2007. Evaluation of corrosion resistance of Portland pozzolana cement and fly ash blended cements in pre-cracked reinforced concrete slabs under accelerated testing conditions, Mater. Chem. Phys., 104(2-3): 356–361.
Tapan, M. and Aboutaha R. S., 2011. Effect of steel corrosion and loss of concrete cover on strength of deteriorated RCcolumns, Constr. Build. Mater., 25(5): 2596–2603.
Torres-Acosta, A. A., Navarro-Gutierrez, S. and Terán-Guillén, J., 2007. Residual flexure capacity of corroded reinforced concrete beams, Eng. Struct., 29(6): 1145–1152.
Wu, S. X., Wu, J., Wang, Q. P., Shen, D. J. and Bian, H. B., 2003. Investigation of corrosion damage of reinforced concrete structure in marine environment -a case study, International Conference on Advances in Concrete and Structures-ICACS 2003. Xuzhou, China, 431-441.
Xia, J., Jin, W. L. and Li, L. Y., 2011. Shear performance of reinforced concrete beams with corroded stirrups in chloride environment, Corros. Sci., 53(5): 1794–1805.
Yuan, Y. S., Jiang, J. H. and Peng, T., 2010. Corrosion process of steel bar in concrete in full lifetime, ACI Mater. J., 107(6): 562–567.
Author information
Authors and Affiliations
Corresponding author
Additional information
This research was financially supported by the National Natural Science Foundation of China (Grant No. 50079002).
Rights and permissions
About this article
Cite this article
Wu, Sx., Liu, Gg., Bian, Hb. et al. Degradation and mechanism of the mechanics and durability of reinforced concrete slab in a marine environment. China Ocean Eng 30, 257–270 (2016). https://doi.org/10.1007/s13344-016-0016-8
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s13344-016-0016-8