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External Confined Concrete Cylinders Behavior under Axial Compression Using CFRP Wrapping

Carbon-fiber-reinforced polymer (CFRP) is a composite material used to mend and strengthen concrete structural elements in civil engineering. The prime aim of this experimental study is to investigate the comportment of confined concrete cylinders (CCC) under uniaxial loads by altering the concrete...

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Autores principales: Karouche, Abdelhamid, Hebbache, Kamel, Belebchouche, Cherif, Lahbari, Noureddine, Kessal, Oussama, Czarnecki, Slawomir
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9695852/
https://www.ncbi.nlm.nih.gov/pubmed/36431716
http://dx.doi.org/10.3390/ma15228232
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author Karouche, Abdelhamid
Hebbache, Kamel
Belebchouche, Cherif
Lahbari, Noureddine
Kessal, Oussama
Czarnecki, Slawomir
author_facet Karouche, Abdelhamid
Hebbache, Kamel
Belebchouche, Cherif
Lahbari, Noureddine
Kessal, Oussama
Czarnecki, Slawomir
author_sort Karouche, Abdelhamid
collection PubMed
description Carbon-fiber-reinforced polymer (CFRP) is a composite material used to mend and strengthen concrete structural elements in civil engineering. The prime aim of this experimental study is to investigate the comportment of confined concrete cylinders (CCC) under uniaxial loads by altering the concrete strength, the CFRP angle orientation, and the volumetric ratio, following the externally bonded reinforcement technique (EBR). We present the results of the confinement effect and failure mechanisms issue of more than 150 specimens of CFRP confined concrete cylinders that have been undertaken and in which several parameters were altered. Totally and partially confined concrete cylinders were tested for failure under axial compressive loads and indirect tensile tests. Four different ratios of water/cement (0.33, 0.36, 0.401, and 0.522) were investigated. In addition, three sand–resin ratios were prepared to improve the mechanical properties and the adhesion of the CFRP and the concrete. The obtained results revealed a clear improvement in the compressive strength of the specimens made with low strength concrete (from 38% to 66%) compared to those made of high strength concrete (from 11% to 31%), where the improvements are relatively low. Furthermore, the transversally confined concrete cylinders presented significant gains in strength over those confined longitudinally. Lastly, adding sand to the resin increases the compressive strength of confined concrete cylinders (1.19% to 54.62%) and reduces the cost of the resin used for fixing CFRP materials.
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spelling pubmed-96958522022-11-26 External Confined Concrete Cylinders Behavior under Axial Compression Using CFRP Wrapping Karouche, Abdelhamid Hebbache, Kamel Belebchouche, Cherif Lahbari, Noureddine Kessal, Oussama Czarnecki, Slawomir Materials (Basel) Article Carbon-fiber-reinforced polymer (CFRP) is a composite material used to mend and strengthen concrete structural elements in civil engineering. The prime aim of this experimental study is to investigate the comportment of confined concrete cylinders (CCC) under uniaxial loads by altering the concrete strength, the CFRP angle orientation, and the volumetric ratio, following the externally bonded reinforcement technique (EBR). We present the results of the confinement effect and failure mechanisms issue of more than 150 specimens of CFRP confined concrete cylinders that have been undertaken and in which several parameters were altered. Totally and partially confined concrete cylinders were tested for failure under axial compressive loads and indirect tensile tests. Four different ratios of water/cement (0.33, 0.36, 0.401, and 0.522) were investigated. In addition, three sand–resin ratios were prepared to improve the mechanical properties and the adhesion of the CFRP and the concrete. The obtained results revealed a clear improvement in the compressive strength of the specimens made with low strength concrete (from 38% to 66%) compared to those made of high strength concrete (from 11% to 31%), where the improvements are relatively low. Furthermore, the transversally confined concrete cylinders presented significant gains in strength over those confined longitudinally. Lastly, adding sand to the resin increases the compressive strength of confined concrete cylinders (1.19% to 54.62%) and reduces the cost of the resin used for fixing CFRP materials. MDPI 2022-11-19 /pmc/articles/PMC9695852/ /pubmed/36431716 http://dx.doi.org/10.3390/ma15228232 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
Karouche, Abdelhamid
Hebbache, Kamel
Belebchouche, Cherif
Lahbari, Noureddine
Kessal, Oussama
Czarnecki, Slawomir
External Confined Concrete Cylinders Behavior under Axial Compression Using CFRP Wrapping
title External Confined Concrete Cylinders Behavior under Axial Compression Using CFRP Wrapping
title_full External Confined Concrete Cylinders Behavior under Axial Compression Using CFRP Wrapping
title_fullStr External Confined Concrete Cylinders Behavior under Axial Compression Using CFRP Wrapping
title_full_unstemmed External Confined Concrete Cylinders Behavior under Axial Compression Using CFRP Wrapping
title_short External Confined Concrete Cylinders Behavior under Axial Compression Using CFRP Wrapping
title_sort external confined concrete cylinders behavior under axial compression using cfrp wrapping
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9695852/
https://www.ncbi.nlm.nih.gov/pubmed/36431716
http://dx.doi.org/10.3390/ma15228232
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