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https://doi.org/10.18552/2016/...
Article . 2016 . Peer-reviewed
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Performance of Corrosion-Aged Reinforced Concrete (RC) Beams Rehabilitated with Fabric-Reinforced Cementitious Matrix (FRCM)

Authors: Elghazy, Mohammed; Refai, Ahmed El; Ebead, Usama A.; Nanni, Antonio;

Performance of Corrosion-Aged Reinforced Concrete (RC) Beams Rehabilitated with Fabric-Reinforced Cementitious Matrix (FRCM)

Abstract

This paper reports on the feasibility of using fabric-reinforced cementitious matrix (FRCM) systems to rehabilitate corrosion-damaged reinforced concrete (RC) beams. Seven large-scale RC beams were constructed and tested to failure under four-point load configuration. Six beams were subjected to an accelerated corrosion process for 70 days to obtain an estimated mass loss of 10% in the tensile steel reinforcing bars. One virgin beam and one corroded unrepaired beam were used as benchmarks for comparison purpose. The other five corroded beams were repaired before applying the FRCM system. The test parameters included the number of fabric plies (1, 2, and 4) and the strengthening schemes (end-anchored bottom flexural strips and fully U-wrapped flexural strips). Test results showed that corrosion insignificantly reduced the yield and the ultimate strength of the specimen. However, the corroded specimen failed to meet the provisions of the ACI 318 code for crack width criteria. The use of FRCM increased the ultimate capacity of corroded beams between 6% and 46% and their yield strength up to 20% in comparison with those of the control virgin beam. The specimens repaired with U-wrapped FRCM strips showed higher capacity and higher ductility than those repaired with the end-anchored bottom strips having similar number of layers. A higher gain in the flexural capacity and a lower ductility index were reported for specimens with higher amount of FRCM layers. 2016 International Committee of the SCMT conferences. All rights reserved. The project was made possible with the financial support received from Qatar National Research Fund (a member of Qatar Foundation) under NPRP grant # 7-1720-2-641. The statements made herein are solely the responsibility of the authors. Scopus

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Keywords

Steel corrosion, Flexural capacity, Matrix algebra, Ductility indices, Ultimate strength, Reinforced concrete, Cementitious matrices, Sustainable development, Reinforcing bar, Accelerated corrosion process, Reinforced concrete beams, Ultimate capacity, Ductility

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
6
Average
Average
Average
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