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Prediction of the Residual Flexural Capacities of Deteriorated and Retrofitted Reinforced Concrete Members with Different Corrosion Conditions

Authors:

H. V. A. N. Sanjeewa ,

University of Ruhuna, LK
About H. V. A. N.

Lecturer, Faculty of Engineering

AMIE(SL), B.Sc. Eng. (Hons) (Ruhuna), M.Eng. (Strut)

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J. M. R. S. Appuhamy

University of Ruhuna, LK
About J. M. R. S.

Senior Lecturer, Faculty of Engineering

 

AMIE(SL), B.Sc. Eng. (Hons) (Peradeniya), M.Sc. (Pavia), PhD (Ehime)

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Abstract

The structural performance of reinforced concrete (RC) members are adversely affected by reinforcement corrosion. Generally, corrosion is intensified and further corrosion occurs once corrosion appears on the concrete surface and it reduces the service life of RC structures. Several RC beams were cast and test specimens were subjected to the ‘electrochemical corrosion technique’ to corrode the embedded reinforcement bars of the specimens. A copper bar was connected to a negative terminal (cathode) and embedded reinforcement bars of the specimens were connected to a positive terminal (anode). Specimens were tested under static load after they were corroded for different corrosion conditions. Results of the study reveal that the flexural capacity of corroded test samples was linearly reduced as the severity of the corrosion condition increased. Xypex layer was applied on the corroded samples as an easily applicable retrofitting method. Specimens were tested under static load to obtain the ultimate load values. Results were compared with the ultimate load values of nonretrofitted beams to evaluate the efficiency of the retrofitting method. Observations indicate a considerable amount of percentage flexural capacity increment for the corroded retrofitted samples compared to the similarly corroded non-retrofitted samples.
How to Cite: Sanjeewa, H.V.A.N. and Appuhamy, J.M.R.S., 2022. Prediction of the Residual Flexural Capacities of Deteriorated and Retrofitted Reinforced Concrete Members with Different Corrosion Conditions. Engineer: Journal of the Institution of Engineers, Sri Lanka, 55(1), pp.41–48. DOI: http://doi.org/10.4038/engineer.v55i1.7485
Published on 10 Jun 2022.
Peer Reviewed

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