Innovative Repair of Severely Corroded T-Beams Using Fabric-Reinforced Cementitious Matrix
Publication: Journal of Composites for Construction
Volume 20, Issue 3
Abstract
This paper offers an innovative technique for rehabilitation of severely corroded reinforced concrete (RC) T-beams using fabric-reinforced cementitious matrix (FRCM). Eight RC T-beam specimens were constructed and tested to failure under four-point load configuration. One beam was neither corroded nor repaired to act as a benchmark. Seven beams were presubjected to accelerated corrosion for 5 months that corresponded to an average tensile steel mass loss of 22%. Corrosion was restricted to the tensile steel located in the middle third of the beam span. Six corroded beams were repaired with either carbon or basalt FRCM system whereas one corroded beam was left unrepaired. The fabrics were internally embedded within the clear cover of the corroded-repaired region and/or externally bonded along the beam span. Corrosion damage significantly reduced the flexural capacity and ductility of the unrepaired beam. The basalt FRCM system could not restore the original flexural capacity of the beam whereas the carbon FRCM system fully restored the capacity. Doubling the amount of the internally embedded carbon FRCM layers slightly increased the strength gain but restored only 90% of the original beam ductility. The use of a combination of internally embedded and externally bonded carbon FRCM layers was more effective in improving the flexural response than the use of same amount of FRCM layers internally embedded within the corroded-repaired region.
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Acknowledgments
The authors would like to express their gratitude to the UAEU for financing this project under Grant No. 31N121.
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Published In
Journal of Composites for Construction
Volume 20 • Issue 3 • June 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Jun 3, 2015
Accepted: Sep 16, 2015
Published online: Oct 29, 2015
Discussion open until: Mar 29, 2016
Published in print: Jun 1, 2016
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