Impedance Spectroscopy as a Methodology to Evaluate the Reactivity of Metakaolin Based Geopolymers
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://hdl.handle.net/11449/238825 |
Resumo: | The aim of this study was to use the electrical impedance spectroscopy technique (IS) to carry out a systematic study on the mechanism of metakaolin geopolymerization for up to 7 curing days. The study was developed on two batches of metakaolin (MK), and their reaction processes were compared. Interpretative fundamental elements were developed based on the effective electrical conductivity curves regarding the metakaolin geopolymerization. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were previously carried out and used to interpret and validate the electrical behavior of the fresh and hardened MKbased geopolymer pastes. The results highlighted the sensibility of the impedance technique to the identification and description of the MK geopolymerization process, as well as the changes resulting from even slight variations in the metakaolin composition. Furthermore, this indicated that the geopolymerization process in highly alkaline solutions could be divided into seven stages, including the processes of dissolution, nucleation, precipitation and formation of the gel and, eventually, the retraction/microcracks constitution. Late dissolution processes could be observed during the more advanced stages and were attributed to particles not being fully hydrated. |
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spelling |
Impedance Spectroscopy as a Methodology to Evaluate the Reactivity of Metakaolin Based GeopolymersGeopolymerMetakaolinImpedance spectroscopyThe aim of this study was to use the electrical impedance spectroscopy technique (IS) to carry out a systematic study on the mechanism of metakaolin geopolymerization for up to 7 curing days. The study was developed on two batches of metakaolin (MK), and their reaction processes were compared. Interpretative fundamental elements were developed based on the effective electrical conductivity curves regarding the metakaolin geopolymerization. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were previously carried out and used to interpret and validate the electrical behavior of the fresh and hardened MKbased geopolymer pastes. The results highlighted the sensibility of the impedance technique to the identification and description of the MK geopolymerization process, as well as the changes resulting from even slight variations in the metakaolin composition. Furthermore, this indicated that the geopolymerization process in highly alkaline solutions could be divided into seven stages, including the processes of dissolution, nucleation, precipitation and formation of the gel and, eventually, the retraction/microcracks constitution. Late dissolution processes could be observed during the more advanced stages and were attributed to particles not being fully hydrated.OutraConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Versão final do editorUniversidade Estadual Paulista (UNESP), Campus de Ilha SolteiraInstitute of Concrete Science and Technology (ICITECH), Universitat Politècnica de ValènciaFapesp: 13/07296-2Fapesp: 20/16325-0Capes: Finance Code 001CNPQ: 584 478057/2013-0, 309015/2015-4 and 310056/2021-7European Union—Next Generation (María Zambrano for attraction of international talentMPDIUniversidade Estadual Paulista (Unesp)Sanches, Alex OtávioIstuque, Danilo BordanBortoletto, MarceloMalmonge, José AntônioSoriano, LourdesBorrachero, María VictoriaPayá, JordiTashima, Mauro M.Akasaki, Jorge Luis2023-01-18T18:54:15Z2023-01-18T18:54:15Z2022-11-25info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/11449/23882510.3390/ma152383870000-0003-2730-74350000-0002-1872-88710000-0002-0435-89530000-0002-1773-31420000-0002-5749-46090000-0002-7873-06580000-0001-7425-53110000-0003-0885-92930000-0003-1986-1196engMaterialsinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESP2024-01-22T06:23:25Zoai:repositorio.unesp.br:11449/238825Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-01-22T06:23:25Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Impedance Spectroscopy as a Methodology to Evaluate the Reactivity of Metakaolin Based Geopolymers |
title |
Impedance Spectroscopy as a Methodology to Evaluate the Reactivity of Metakaolin Based Geopolymers |
spellingShingle |
Impedance Spectroscopy as a Methodology to Evaluate the Reactivity of Metakaolin Based Geopolymers Sanches, Alex Otávio Geopolymer Metakaolin Impedance spectroscopy |
title_short |
Impedance Spectroscopy as a Methodology to Evaluate the Reactivity of Metakaolin Based Geopolymers |
title_full |
Impedance Spectroscopy as a Methodology to Evaluate the Reactivity of Metakaolin Based Geopolymers |
title_fullStr |
Impedance Spectroscopy as a Methodology to Evaluate the Reactivity of Metakaolin Based Geopolymers |
title_full_unstemmed |
Impedance Spectroscopy as a Methodology to Evaluate the Reactivity of Metakaolin Based Geopolymers |
title_sort |
Impedance Spectroscopy as a Methodology to Evaluate the Reactivity of Metakaolin Based Geopolymers |
author |
Sanches, Alex Otávio |
author_facet |
Sanches, Alex Otávio Istuque, Danilo Bordan Bortoletto, Marcelo Malmonge, José Antônio Soriano, Lourdes Borrachero, María Victoria Payá, Jordi Tashima, Mauro M. Akasaki, Jorge Luis |
author_role |
author |
author2 |
Istuque, Danilo Bordan Bortoletto, Marcelo Malmonge, José Antônio Soriano, Lourdes Borrachero, María Victoria Payá, Jordi Tashima, Mauro M. Akasaki, Jorge Luis |
author2_role |
author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Sanches, Alex Otávio Istuque, Danilo Bordan Bortoletto, Marcelo Malmonge, José Antônio Soriano, Lourdes Borrachero, María Victoria Payá, Jordi Tashima, Mauro M. Akasaki, Jorge Luis |
dc.subject.por.fl_str_mv |
Geopolymer Metakaolin Impedance spectroscopy |
topic |
Geopolymer Metakaolin Impedance spectroscopy |
description |
The aim of this study was to use the electrical impedance spectroscopy technique (IS) to carry out a systematic study on the mechanism of metakaolin geopolymerization for up to 7 curing days. The study was developed on two batches of metakaolin (MK), and their reaction processes were compared. Interpretative fundamental elements were developed based on the effective electrical conductivity curves regarding the metakaolin geopolymerization. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were previously carried out and used to interpret and validate the electrical behavior of the fresh and hardened MKbased geopolymer pastes. The results highlighted the sensibility of the impedance technique to the identification and description of the MK geopolymerization process, as well as the changes resulting from even slight variations in the metakaolin composition. Furthermore, this indicated that the geopolymerization process in highly alkaline solutions could be divided into seven stages, including the processes of dissolution, nucleation, precipitation and formation of the gel and, eventually, the retraction/microcracks constitution. Late dissolution processes could be observed during the more advanced stages and were attributed to particles not being fully hydrated. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-11-25 2023-01-18T18:54:15Z 2023-01-18T18:54:15Z |
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 |
http://hdl.handle.net/11449/238825 10.3390/ma15238387 0000-0003-2730-7435 0000-0002-1872-8871 0000-0002-0435-8953 0000-0002-1773-3142 0000-0002-5749-4609 0000-0002-7873-0658 0000-0001-7425-5311 0000-0003-0885-9293 0000-0003-1986-1196 |
url |
http://hdl.handle.net/11449/238825 |
identifier_str_mv |
10.3390/ma15238387 0000-0003-2730-7435 0000-0002-1872-8871 0000-0002-0435-8953 0000-0002-1773-3142 0000-0002-5749-4609 0000-0002-7873-0658 0000-0001-7425-5311 0000-0003-0885-9293 0000-0003-1986-1196 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Materials |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
MPDI |
publisher.none.fl_str_mv |
MPDI |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1792962403340648448 |