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Open AccessArticle

Rehabilitation of Corrosion-Defected RC Beam-Column Members Using Patch Repair Technique

Department of Civil Engineering, Collage of Engineering, University of Babylon, Hillah 51001, Iraq
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Buildings 2019, 9(5), 120; https://doi.org/10.3390/buildings9050120
Received: 18 March 2019 / Revised: 12 April 2019 / Accepted: 24 April 2019 / Published: 10 May 2019
An experimental study was conducted to evaluate the efficiency of patch repair to rehabilitate corrosion-defected reinforced concrete (RC) beam-column members when exposed to bending moments and axial forces. Ten RC beam-column members were tested under combined constant axial force and four-point transverse load up to failure. Two levels of the constant axial force were applied at either 15 kN or 30 kN (i.e., 25% or 50% of the ultimate design load of the control specimen). The accelerated corrosion process was used to get steel reinforcement corrosion inside the concrete of three levels, 0% and approximately 5% and 20%, according to Faraday’s law. The patch repair technique of cleaning or replacing corroded steel bars and replacing the damaged concrete cover with new mortar was used in this study. The experimental results of the corrosion-defected specimens showed a significant deterioration in the structural performance and the integrity by reducing ultimate capacity, stiffness, serviceability, and ductility. Additionally, the effect of increasing axial force was recorded clearly by reducing the adverse effect of corrosion, especially for defected specimens with high corrosion level. The deterioration of corrosion reinforcement could be overcome when using a patch repair technique, which restored the undamaged state and was shown clearly by using a patch repair technique with replacing corroded steel bars. View Full-Text
Keywords: corrosion; rehabilitation; patch repair; axial force; beam-column member corrosion; rehabilitation; patch repair; axial force; beam-column member
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A. Alwash, N.; M. Kadhum, M.; M. Mahdi, A. Rehabilitation of Corrosion-Defected RC Beam-Column Members Using Patch Repair Technique. Buildings 2019, 9, 120.

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