Potential reactivity assessment of mechanically activated kaolin as alternative cement precursor

This work aims to assess the potential reactivity of a mechanically activated kaolin for its use as an alternative cement precursor. The mechanical activation was successfully achieved by grinding at different rotation speeds (250, 300, and 350 rpm) and times (60, 90, and 120 min), obtaining a highl...

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Autores: Mañosa Bover, Jofre, Gómez-Carrera, A.M., Svobodova Sedlackova, Adela, Maldonado Alameda, Alex, Fernández-Jiménez, A., Chimenos Ribera, Josep Ma.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/189690
Acceso en línea:https://hdl.handle.net/2445/189690
Access Level:acceso abierto
Palabra clave:Ciment
Materials de construcció
Cement
Building materials
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spelling Potential reactivity assessment of mechanically activated kaolin as alternative cement precursorMañosa Bover, JofreGómez-Carrera, A.M.Svobodova Sedlackova, AdelaMaldonado Alameda, AlexFernández-Jiménez, A.Chimenos Ribera, Josep Ma.CimentMaterials de construccióCementBuilding materialsThis work aims to assess the potential reactivity of a mechanically activated kaolin for its use as an alternative cement precursor. The mechanical activation was successfully achieved by grinding at different rotation speeds (250, 300, and 350 rpm) and times (60, 90, and 120 min), obtaining a highly amorphous and reactive material. The amorphization was monitored through XRD with amorphous content estimation and FTIR deconvolution. The potential reactivity was evaluated through chemical attacks, obtaining SiO2 and Al2O3 availabilities up to 95 wt% and 93 wt% of total SiO2 and Al2O3 content. XRD and FTIR also allowed the identification of the nonreactive phases on the insoluble residue after chemical attacks. NMR analysis revealed that part of the aluminium was in IV coordination, limiting the reactivity in the alkali activation process. This work demonstrated the effectiveness of mechanical activation as a greener treatment than thermal dehydroxylation to increase the raw kaolin's reactivity.Elsevier B.V.2022info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/189690Articles publicats en revistes (Ciència dels Materials i Química Física)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1016/j.clay.2022.106648Applied Clay Science, 2022, vol. 228, num. 106648https://doi.org/10.1016/j.clay.2022.106648cc-by-nc-nd (c) Mañosa Bover, Jofre, et al., 2022https://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1896902026-05-27T06:46:51Z
dc.title.none.fl_str_mv Potential reactivity assessment of mechanically activated kaolin as alternative cement precursor
title Potential reactivity assessment of mechanically activated kaolin as alternative cement precursor
spellingShingle Potential reactivity assessment of mechanically activated kaolin as alternative cement precursor
Mañosa Bover, Jofre
Ciment
Materials de construcció
Cement
Building materials
title_short Potential reactivity assessment of mechanically activated kaolin as alternative cement precursor
title_full Potential reactivity assessment of mechanically activated kaolin as alternative cement precursor
title_fullStr Potential reactivity assessment of mechanically activated kaolin as alternative cement precursor
title_full_unstemmed Potential reactivity assessment of mechanically activated kaolin as alternative cement precursor
title_sort Potential reactivity assessment of mechanically activated kaolin as alternative cement precursor
dc.creator.none.fl_str_mv Mañosa Bover, Jofre
Gómez-Carrera, A.M.
Svobodova Sedlackova, Adela
Maldonado Alameda, Alex
Fernández-Jiménez, A.
Chimenos Ribera, Josep Ma.
author Mañosa Bover, Jofre
author_facet Mañosa Bover, Jofre
Gómez-Carrera, A.M.
Svobodova Sedlackova, Adela
Maldonado Alameda, Alex
Fernández-Jiménez, A.
Chimenos Ribera, Josep Ma.
author_role author
author2 Gómez-Carrera, A.M.
Svobodova Sedlackova, Adela
Maldonado Alameda, Alex
Fernández-Jiménez, A.
Chimenos Ribera, Josep Ma.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Ciment
Materials de construcció
Cement
Building materials
topic Ciment
Materials de construcció
Cement
Building materials
description This work aims to assess the potential reactivity of a mechanically activated kaolin for its use as an alternative cement precursor. The mechanical activation was successfully achieved by grinding at different rotation speeds (250, 300, and 350 rpm) and times (60, 90, and 120 min), obtaining a highly amorphous and reactive material. The amorphization was monitored through XRD with amorphous content estimation and FTIR deconvolution. The potential reactivity was evaluated through chemical attacks, obtaining SiO2 and Al2O3 availabilities up to 95 wt% and 93 wt% of total SiO2 and Al2O3 content. XRD and FTIR also allowed the identification of the nonreactive phases on the insoluble residue after chemical attacks. NMR analysis revealed that part of the aluminium was in IV coordination, limiting the reactivity in the alkali activation process. This work demonstrated the effectiveness of mechanical activation as a greener treatment than thermal dehydroxylation to increase the raw kaolin's reactivity.
publishDate 2022
dc.date.none.fl_str_mv 2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/189690
url https://hdl.handle.net/2445/189690
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1016/j.clay.2022.106648
Applied Clay Science, 2022, vol. 228, num. 106648
https://doi.org/10.1016/j.clay.2022.106648
dc.rights.none.fl_str_mv cc-by-nc-nd (c) Mañosa Bover, Jofre, et al., 2022
https://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by-nc-nd (c) Mañosa Bover, Jofre, et al., 2022
https://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv Articles publicats en revistes (Ciència dels Materials i Química Física)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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