Corrosion Characteristics of Steel Bars Embedded in Recycled Concrete Beams under Static Loads
Publication: Journal of Materials in Civil Engineering
Volume 32, Issue 9
Abstract
To investigate the corrosion characteristics of steel bars embedded in recycled concrete beams under static loads, 12 recycled concrete beams were designed for electrochemical corrosion test taking into consideration a combination of 3 types of recycled coarse aggregate (RCA) replacement ratios (i.e., 0%, 50%, and 100%) and 4 levels of static load (i.e., 0, 0.2, 0.4, and 0.6). The results indicate that the mass losses of longitudinal tensile reinforcement and stirrup increase with both the RCA replacement ratio and the applied static load level. For corroded beams with a 50% RCA replacement ratio, the effect of an increase of 0.2 in the applied static load level on the corrosion of longitudinal tensile steel bars is greater than that of an increase of 50% in the RCA replacement ratio. For corroded beams with the same RCA replacement ratio, the maximum mass losses of longitudinal tensile reinforcement and short limbs of stirrups in the tension zone of the beams have a linear relationship with their average mass losses, and there is a positive correlation in the corrosion degree between the short limbs of stirrups in the tension zone of the beams and the longitudinal tensile steel bar. There exists a linear relationship between the pitting factor of longitudinal tensile reinforcement and its average mass loss, and the pitting factor decreases with the increase in average mass loss, which indicates that the corrosion of longitudinal tensile reinforcement tends to be uniform along the length with its increasing average mass loss.
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Data Availability Statement
All experimental data, computed data, models, and code generated or used during the study appear in this article.
Acknowledgments
The authors would like to acknowledge the financial support of the Transportation Science and Technology Project of Shaanxi Transportation Department of China (10-43K) for this research.
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Published In
Journal of Materials in Civil Engineering
Volume 32 • Issue 9 • September 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Oct 16, 2019
Accepted: Mar 17, 2020
Published online: Jul 1, 2020
Published in print: Sep 1, 2020
Discussion open until: Dec 1, 2020
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