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Repairing of web opened RC beam with ferrocement laminates using alkali activated mortar

Repairing of web opened RC beam with ferrocement laminates using alkali activated mortar The present paper introduces and validates a noble retrofitting technique for restoring damaged reinforced concrete (RC) beam with web opening using geopolymer-based ferrocement laminates. Several RC beams with transverse opening in the flexure zone (BMS) and the shear zone (BSS) are prepared along with a solid beam (SB) to study the effect of opening in RC beams. The beam specimens are initially tested to their ultimate load, and the damaged beams are retrofitted using alkali activated geopolymer mortar (GM), followed by local strengthening of the opening using ferrocement laminates. To assess the efficiency of the repair material over the conventional repair material, Portland cement mortar (PCM) is also used as an alternative repair material. The repaired specimens are tested again on the 3rd day and the 28th day of repairing. The test result shows that the presence of an opening reduced the load carrying capacity of the beam and significantly effects the post-peak behaviour of the beam. GM as a repair material exhibits better adherence with the damaged beam than PCM. The noble retrofitting technique is capable of full restoration of all the structural integrity even on the 3rd day of repair. The load carrying capacity of the damaged BMS is enhanced by 18%, while that of BSS is enhanced by 41%. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Building Pathology and Rehabilitation Springer Journals

Repairing of web opened RC beam with ferrocement laminates using alkali activated mortar

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References (62)

Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
ISSN
2365-3159
eISSN
2365-3167
DOI
10.1007/s41024-023-00302-5
Publisher site
See Article on Publisher Site

Abstract

The present paper introduces and validates a noble retrofitting technique for restoring damaged reinforced concrete (RC) beam with web opening using geopolymer-based ferrocement laminates. Several RC beams with transverse opening in the flexure zone (BMS) and the shear zone (BSS) are prepared along with a solid beam (SB) to study the effect of opening in RC beams. The beam specimens are initially tested to their ultimate load, and the damaged beams are retrofitted using alkali activated geopolymer mortar (GM), followed by local strengthening of the opening using ferrocement laminates. To assess the efficiency of the repair material over the conventional repair material, Portland cement mortar (PCM) is also used as an alternative repair material. The repaired specimens are tested again on the 3rd day and the 28th day of repairing. The test result shows that the presence of an opening reduced the load carrying capacity of the beam and significantly effects the post-peak behaviour of the beam. GM as a repair material exhibits better adherence with the damaged beam than PCM. The noble retrofitting technique is capable of full restoration of all the structural integrity even on the 3rd day of repair. The load carrying capacity of the damaged BMS is enhanced by 18%, while that of BSS is enhanced by 41%.

Journal

Journal of Building Pathology and Rehabilitation – Springer Journals

Published: Jun 1, 2023

Keywords: Web-opening; Geopolymer Mortar; Slag; Repairing; Welded wire-mesh

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