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Underwater Repair of Concrete Elements with TRC Grouting System
The repair of underwater concrete structures is usually difficult work, requiring specialized materials and installation systems. This paper presents a carbon-textile-reinforced concrete (TRC) grouting system for underwater repair of concrete structures. One multi-purpose grout and two types of unde...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9267561/ https://www.ncbi.nlm.nih.gov/pubmed/35806591 http://dx.doi.org/10.3390/ma15134469 |
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author | Kim, Hyeong-Yeol You, Young-Jun Ryu, Gum-Sung |
author_facet | Kim, Hyeong-Yeol You, Young-Jun Ryu, Gum-Sung |
author_sort | Kim, Hyeong-Yeol |
collection | PubMed |
description | The repair of underwater concrete structures is usually difficult work, requiring specialized materials and installation systems. This paper presents a carbon-textile-reinforced concrete (TRC) grouting system for underwater repair of concrete structures. One multi-purpose grout and two types of underwater grouts were considered in this study, and the bond performance between the substrate and grout was evaluated by a bi-surface shear test with cubic specimens. The bond strength of the repair material is greatly affected by the casting and curing conditions. When the multi-purpose grout is used, the average bond strength of the specimens cast and cured in dry conditions is only 22% of the specimens cast and cured in underwater conditions. On the other hand, the maximum difference in bond strength is, at most, 15.8% when non-dispersive, anti-washout grouts are used. Two types of installation methods were proposed and four full-scale RC slab specimens were repaired with the TRC grouting method, two for each installation method. Regardless of the installation method, the load levels that causes concrete cracking, steel yield, and the failure of specimens repaired with the TRC grouting system are at least 37.5%, 16.6%, and 21.7% greater than those of the unrepaired specimen, respectively. The test results further indicate that the influence of the grouting materials on the ultimate load-carrying capacity of the specimens repaired with the TRC grouting system is insignificant, and the maximum difference is, at most, 4%. |
format | Online Article Text |
id | pubmed-9267561 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-92675612022-07-09 Underwater Repair of Concrete Elements with TRC Grouting System Kim, Hyeong-Yeol You, Young-Jun Ryu, Gum-Sung Materials (Basel) Article The repair of underwater concrete structures is usually difficult work, requiring specialized materials and installation systems. This paper presents a carbon-textile-reinforced concrete (TRC) grouting system for underwater repair of concrete structures. One multi-purpose grout and two types of underwater grouts were considered in this study, and the bond performance between the substrate and grout was evaluated by a bi-surface shear test with cubic specimens. The bond strength of the repair material is greatly affected by the casting and curing conditions. When the multi-purpose grout is used, the average bond strength of the specimens cast and cured in dry conditions is only 22% of the specimens cast and cured in underwater conditions. On the other hand, the maximum difference in bond strength is, at most, 15.8% when non-dispersive, anti-washout grouts are used. Two types of installation methods were proposed and four full-scale RC slab specimens were repaired with the TRC grouting method, two for each installation method. Regardless of the installation method, the load levels that causes concrete cracking, steel yield, and the failure of specimens repaired with the TRC grouting system are at least 37.5%, 16.6%, and 21.7% greater than those of the unrepaired specimen, respectively. The test results further indicate that the influence of the grouting materials on the ultimate load-carrying capacity of the specimens repaired with the TRC grouting system is insignificant, and the maximum difference is, at most, 4%. MDPI 2022-06-24 /pmc/articles/PMC9267561/ /pubmed/35806591 http://dx.doi.org/10.3390/ma15134469 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Kim, Hyeong-Yeol You, Young-Jun Ryu, Gum-Sung Underwater Repair of Concrete Elements with TRC Grouting System |
title | Underwater Repair of Concrete Elements with TRC Grouting System |
title_full | Underwater Repair of Concrete Elements with TRC Grouting System |
title_fullStr | Underwater Repair of Concrete Elements with TRC Grouting System |
title_full_unstemmed | Underwater Repair of Concrete Elements with TRC Grouting System |
title_short | Underwater Repair of Concrete Elements with TRC Grouting System |
title_sort | underwater repair of concrete elements with trc grouting system |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9267561/ https://www.ncbi.nlm.nih.gov/pubmed/35806591 http://dx.doi.org/10.3390/ma15134469 |
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