Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Kim, Hyeong-Yeol, You, Young-Jun, Ryu, Gum-Sung
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
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
_version_ 1784743748754735104
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
work_keys_str_mv AT kimhyeongyeol underwaterrepairofconcreteelementswithtrcgroutingsystem
AT youyoungjun underwaterrepairofconcreteelementswithtrcgroutingsystem
AT ryugumsung underwaterrepairofconcreteelementswithtrcgroutingsystem