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Investigation of the effectiveness of CFRP strengthening of concrete made with recycled waste PET fine plastic aggregate

In recent decades, several studies have considered the use of plastic waste as a partial substitute for aggregate in green concrete. Such concrete has been limited to non-structural applications due to its low strength. This raises whether such concrete can be enhanced for use in some structural app...

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Autores principales: Qaidi, Shaker, Al-Kamaki, Yaman S. S., Al-Mahaidi, Riadh, Mohammed, Ahmed S., Ahmed, Hemn Unis, Zaid, Osama, Althoey, Fadi, Ahmad, Jawad, Isleem, Haytham F., Bennetts, Ian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9278765/
https://www.ncbi.nlm.nih.gov/pubmed/35830388
http://dx.doi.org/10.1371/journal.pone.0269664
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author Qaidi, Shaker
Al-Kamaki, Yaman S. S.
Al-Mahaidi, Riadh
Mohammed, Ahmed S.
Ahmed, Hemn Unis
Zaid, Osama
Althoey, Fadi
Ahmad, Jawad
Isleem, Haytham F.
Bennetts, Ian
author_facet Qaidi, Shaker
Al-Kamaki, Yaman S. S.
Al-Mahaidi, Riadh
Mohammed, Ahmed S.
Ahmed, Hemn Unis
Zaid, Osama
Althoey, Fadi
Ahmad, Jawad
Isleem, Haytham F.
Bennetts, Ian
author_sort Qaidi, Shaker
collection PubMed
description In recent decades, several studies have considered the use of plastic waste as a partial substitute for aggregate in green concrete. Such concrete has been limited to non-structural applications due to its low strength. This raises whether such concrete can be enhanced for use in some structural applications. This paper reports an attempt to develop a structural-grade concrete containing plastic waste aggregate with high proportions of substitution and confined with carbon fiber reinforced polymer (CFRP) fabrics. Experimental research was conducted involving the casting and testing 54 plain and confined concrete cylinders. A concrete mixture was designed in which the fine aggregate was partially replaced by polyethylene terephthalate (PET) waste plastic at ratios of 0%, 25%, and 50%, and with different w/c ratios of 0.40, 0.45, and 0.55. The results show that confinement has a substantial positive effect on the compressive behavior of PET concrete. The enhancement efficiency increases by 8–190%, with higher enhancement levels for higher substitution ratios. Adding one layer of CFRP fabric raises the ultimate strength of samples that have lost compressive strength to a level close to that of unconfined samples not containing PET. This confinement is accompanied by an increase in the slope of the stress-strain curve and greater axial and lateral strain values at failure. For the specimens confined by CFRP fabric, PET aggregate can be used as a partial substitute for sand at a replacement ratio of up to 50% by volume for structural applications. This paper also considers the ability of existing models to predict the strength of confined-PET concrete circular cross-sections by comparing model predictions with experimental results. The strength of confined PET concrete elements can’t be accurately predicted by any of the models that are already out there. It’s important to come up with a new model for these elements.
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spelling pubmed-92787652022-07-14 Investigation of the effectiveness of CFRP strengthening of concrete made with recycled waste PET fine plastic aggregate Qaidi, Shaker Al-Kamaki, Yaman S. S. Al-Mahaidi, Riadh Mohammed, Ahmed S. Ahmed, Hemn Unis Zaid, Osama Althoey, Fadi Ahmad, Jawad Isleem, Haytham F. Bennetts, Ian PLoS One Research Article In recent decades, several studies have considered the use of plastic waste as a partial substitute for aggregate in green concrete. Such concrete has been limited to non-structural applications due to its low strength. This raises whether such concrete can be enhanced for use in some structural applications. This paper reports an attempt to develop a structural-grade concrete containing plastic waste aggregate with high proportions of substitution and confined with carbon fiber reinforced polymer (CFRP) fabrics. Experimental research was conducted involving the casting and testing 54 plain and confined concrete cylinders. A concrete mixture was designed in which the fine aggregate was partially replaced by polyethylene terephthalate (PET) waste plastic at ratios of 0%, 25%, and 50%, and with different w/c ratios of 0.40, 0.45, and 0.55. The results show that confinement has a substantial positive effect on the compressive behavior of PET concrete. The enhancement efficiency increases by 8–190%, with higher enhancement levels for higher substitution ratios. Adding one layer of CFRP fabric raises the ultimate strength of samples that have lost compressive strength to a level close to that of unconfined samples not containing PET. This confinement is accompanied by an increase in the slope of the stress-strain curve and greater axial and lateral strain values at failure. For the specimens confined by CFRP fabric, PET aggregate can be used as a partial substitute for sand at a replacement ratio of up to 50% by volume for structural applications. This paper also considers the ability of existing models to predict the strength of confined-PET concrete circular cross-sections by comparing model predictions with experimental results. The strength of confined PET concrete elements can’t be accurately predicted by any of the models that are already out there. It’s important to come up with a new model for these elements. Public Library of Science 2022-07-13 /pmc/articles/PMC9278765/ /pubmed/35830388 http://dx.doi.org/10.1371/journal.pone.0269664 Text en © 2022 Qaidi et al https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Qaidi, Shaker
Al-Kamaki, Yaman S. S.
Al-Mahaidi, Riadh
Mohammed, Ahmed S.
Ahmed, Hemn Unis
Zaid, Osama
Althoey, Fadi
Ahmad, Jawad
Isleem, Haytham F.
Bennetts, Ian
Investigation of the effectiveness of CFRP strengthening of concrete made with recycled waste PET fine plastic aggregate
title Investigation of the effectiveness of CFRP strengthening of concrete made with recycled waste PET fine plastic aggregate
title_full Investigation of the effectiveness of CFRP strengthening of concrete made with recycled waste PET fine plastic aggregate
title_fullStr Investigation of the effectiveness of CFRP strengthening of concrete made with recycled waste PET fine plastic aggregate
title_full_unstemmed Investigation of the effectiveness of CFRP strengthening of concrete made with recycled waste PET fine plastic aggregate
title_short Investigation of the effectiveness of CFRP strengthening of concrete made with recycled waste PET fine plastic aggregate
title_sort investigation of the effectiveness of cfrp strengthening of concrete made with recycled waste pet fine plastic aggregate
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9278765/
https://www.ncbi.nlm.nih.gov/pubmed/35830388
http://dx.doi.org/10.1371/journal.pone.0269664
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