Effects of multiscale carbon-based conductive fillers on the performances of a self-sensing cementitious geocomposite

Detalhes bibliográficos
Autor(a) principal: Abedi, Mohammadmahdi
Data de Publicação: 2021
Outros Autores: Fangueiro, Raúl, Correia, A. Gomes
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://hdl.handle.net/1822/78524
Resumo: In this study, the effects of multiscale conductive carbon fillers, including carbon nanotubes (CNTs), graphene nanoplatelets (GNPs), and carbon fibres (CFs), on the mechanical and microstructural properties, durability, and piezoresistivity of cementitious stabilised sand (CSS) were investigated. In this route, the surface of the CFs was modified via an oxidation process to improve their interfacial performance and dispersion. An optimum amount of hybrid CNT/GNP with different concentrations of CFs was incorporated into the CSS, and specimens were fabricated using the standard compaction method at the optimum water content. The interfacial properties of the CFs were studied by performing pullout tests and several chemical analyses. The variations in the mechanical and microstructural, durability, and piezoresistivity of the CSS, were investigated by various tests. In addition, the status of the specimens in terms of residual strain and damages was identified by the digital image correlation technique. The results showed a considerable improvement in the interfacial properties of the modified CFs in terms of physical and chemical bonding with the cement matrix. In addition, a combination of 0.17% CNT/GNP (1:1, by weight of dry sand) with 0.75% CF can improve the maximum dry density and mechanical properties, as well as the ductility and durability of the CSS. In addition, using multiscale conductive fillers resulted in a considerable enhancement in the electrical conductivity and piezoresistivity of the CSS. The outcomes indicate the immense potential of CNT/GNP/CF for the development of a sustainable self-sensing cementitious geocomposite.
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spelling Effects of multiscale carbon-based conductive fillers on the performances of a self-sensing cementitious geocompositeCementitious stabilised sandGrapheneCarbon nanotubesSelf-sensingMultiscalecarbonnanotubesCementitious stabilised sand: graphene: carbon nanotubes: self-sensing: multiscaleScience & TechnologyIn this study, the effects of multiscale conductive carbon fillers, including carbon nanotubes (CNTs), graphene nanoplatelets (GNPs), and carbon fibres (CFs), on the mechanical and microstructural properties, durability, and piezoresistivity of cementitious stabilised sand (CSS) were investigated. In this route, the surface of the CFs was modified via an oxidation process to improve their interfacial performance and dispersion. An optimum amount of hybrid CNT/GNP with different concentrations of CFs was incorporated into the CSS, and specimens were fabricated using the standard compaction method at the optimum water content. The interfacial properties of the CFs were studied by performing pullout tests and several chemical analyses. The variations in the mechanical and microstructural, durability, and piezoresistivity of the CSS, were investigated by various tests. In addition, the status of the specimens in terms of residual strain and damages was identified by the digital image correlation technique. The results showed a considerable improvement in the interfacial properties of the modified CFs in terms of physical and chemical bonding with the cement matrix. In addition, a combination of 0.17% CNT/GNP (1:1, by weight of dry sand) with 0.75% CF can improve the maximum dry density and mechanical properties, as well as the ductility and durability of the CSS. In addition, using multiscale conductive fillers resulted in a considerable enhancement in the electrical conductivity and piezoresistivity of the CSS. The outcomes indicate the immense potential of CNT/GNP/CF for the development of a sustainable self-sensing cementitious geocomposite.This work was supported by the European Commission-Shift2Rail Program under the project “IN2TRACK3, H2020–S2RJU-CFM-2020, S2R-CFMIP3- 01–2020”. Furthermore, it is partly financed by FCT/ MCTES through national funds (PIDDAC) under the R&D Unit of the Institute for Sustainability and Innovation in Engineering Structures (ISISE), under reference nº. 101012456, as well as under the R&D Unit of the Centre for Textile Science and Technology (2C2T).ElsevierUniversidade do MinhoAbedi, MohammadmahdiFangueiro, RaúlCorreia, A. Gomes2021-112021-11-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/78524eng2352-710210.1016/j.jobe.2021.103171https://www.sciencedirect.com/science/article/pii/S2352710221010299#!info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:00:41Zoai:repositorium.sdum.uminho.pt:1822/78524Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:50:33.465540Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Effects of multiscale carbon-based conductive fillers on the performances of a self-sensing cementitious geocomposite
title Effects of multiscale carbon-based conductive fillers on the performances of a self-sensing cementitious geocomposite
spellingShingle Effects of multiscale carbon-based conductive fillers on the performances of a self-sensing cementitious geocomposite
Abedi, Mohammadmahdi
Cementitious stabilised sand
Graphene
Carbon nanotubes
Self-sensing
Multiscale
carbon
nanotubes
Cementitious stabilised sand: graphene: carbon nanotubes: self-sensing: multiscale
Science & Technology
title_short Effects of multiscale carbon-based conductive fillers on the performances of a self-sensing cementitious geocomposite
title_full Effects of multiscale carbon-based conductive fillers on the performances of a self-sensing cementitious geocomposite
title_fullStr Effects of multiscale carbon-based conductive fillers on the performances of a self-sensing cementitious geocomposite
title_full_unstemmed Effects of multiscale carbon-based conductive fillers on the performances of a self-sensing cementitious geocomposite
title_sort Effects of multiscale carbon-based conductive fillers on the performances of a self-sensing cementitious geocomposite
author Abedi, Mohammadmahdi
author_facet Abedi, Mohammadmahdi
Fangueiro, Raúl
Correia, A. Gomes
author_role author
author2 Fangueiro, Raúl
Correia, A. Gomes
author2_role author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Abedi, Mohammadmahdi
Fangueiro, Raúl
Correia, A. Gomes
dc.subject.por.fl_str_mv Cementitious stabilised sand
Graphene
Carbon nanotubes
Self-sensing
Multiscale
carbon
nanotubes
Cementitious stabilised sand: graphene: carbon nanotubes: self-sensing: multiscale
Science & Technology
topic Cementitious stabilised sand
Graphene
Carbon nanotubes
Self-sensing
Multiscale
carbon
nanotubes
Cementitious stabilised sand: graphene: carbon nanotubes: self-sensing: multiscale
Science & Technology
description In this study, the effects of multiscale conductive carbon fillers, including carbon nanotubes (CNTs), graphene nanoplatelets (GNPs), and carbon fibres (CFs), on the mechanical and microstructural properties, durability, and piezoresistivity of cementitious stabilised sand (CSS) were investigated. In this route, the surface of the CFs was modified via an oxidation process to improve their interfacial performance and dispersion. An optimum amount of hybrid CNT/GNP with different concentrations of CFs was incorporated into the CSS, and specimens were fabricated using the standard compaction method at the optimum water content. The interfacial properties of the CFs were studied by performing pullout tests and several chemical analyses. The variations in the mechanical and microstructural, durability, and piezoresistivity of the CSS, were investigated by various tests. In addition, the status of the specimens in terms of residual strain and damages was identified by the digital image correlation technique. The results showed a considerable improvement in the interfacial properties of the modified CFs in terms of physical and chemical bonding with the cement matrix. In addition, a combination of 0.17% CNT/GNP (1:1, by weight of dry sand) with 0.75% CF can improve the maximum dry density and mechanical properties, as well as the ductility and durability of the CSS. In addition, using multiscale conductive fillers resulted in a considerable enhancement in the electrical conductivity and piezoresistivity of the CSS. The outcomes indicate the immense potential of CNT/GNP/CF for the development of a sustainable self-sensing cementitious geocomposite.
publishDate 2021
dc.date.none.fl_str_mv 2021-11
2021-11-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://hdl.handle.net/1822/78524
url https://hdl.handle.net/1822/78524
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 2352-7102
10.1016/j.jobe.2021.103171
https://www.sciencedirect.com/science/article/pii/S2352710221010299#!
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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