Alkali activation of recycled ceramic aggregates from construction and demolition wastes
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/67479 |
Resumo: | Environmental concerns are becoming increasingly more significant worldwide, thus creating the urgent need for new sustainable alternatives in the industrial sector. The present study assesses the fundamental properties of ceramic residue (CR) originated by demolition operations, specifically, the floor and wall tiles and sanitaryware furniture, for further incorporation in the construction sector, namely in alkali-activated bind- ers, mixed with other better-known precursors - fly ash (FA) and ladle furnace slag (LFS). Different CR/FA and CR/LFS weight ratios were considered and analyzed by mechanical behavior and microstructural analysis, which included uniaxial compression strength (UCS) tests, Scanning Electron Microscopy (SEM), X-ray Energy Dispersive Analyser (EDX), X-ray diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR). Results obtained showed that the combination of CR and FA or LFS, activated with sodium silicate, produced UCS values higher than 20 MPa and 59 MPa, respectively, after 90 days curing. |
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Alkali activation of recycled ceramic aggregates from construction and demolition wastesAlkali-activated cementCeramicMechanical propertiesPhysical propertiesWaste treatmentCerámicaCemento activado alcalinamenteTratamiento de residuosPropiedades mecánicasPropiedades físicasEngenharia e Tecnologia::Engenharia CivilScience & TechnologyEnvironmental concerns are becoming increasingly more significant worldwide, thus creating the urgent need for new sustainable alternatives in the industrial sector. The present study assesses the fundamental properties of ceramic residue (CR) originated by demolition operations, specifically, the floor and wall tiles and sanitaryware furniture, for further incorporation in the construction sector, namely in alkali-activated bind- ers, mixed with other better-known precursors - fly ash (FA) and ladle furnace slag (LFS). Different CR/FA and CR/LFS weight ratios were considered and analyzed by mechanical behavior and microstructural analysis, which included uniaxial compression strength (UCS) tests, Scanning Electron Microscopy (SEM), X-ray Energy Dispersive Analyser (EDX), X-ray diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR). Results obtained showed that the combination of CR and FA or LFS, activated with sodium silicate, produced UCS values higher than 20 MPa and 59 MPa, respectively, after 90 days curing.Activación alcalina de áridos cerámicos reciclados provenientes de residuos de construcción y demolición. Globalmente, las preocupaciones ambientales son cada vez más significativas, creando así la necesidad urgente de nuevas alternativas sostenibles en el sector industrial. El presente estudio evalúa las propiedades fundamentales de los residuos cerámicos (CR) provenientes de demolición, para ser reincorporados en el sector de la construcción, principalmente como ligantes activados alcalinamente, mezclados con otros precursores más conocidos: cenizas volantes (FA) y escorias de horno de cuchara (LFS). Se consideraron diferentes relaciones de peso CR/FA y CR/LFS, se analizó el comportamiento mecánico y se realizó un análisis microestructural, incluyendo pruebas de resistencia a la compresión (UCS), microscopía electrónica de barrido (SEM), análisis por energías dispersivas de rayos X (EDX), Rayos-X (XRD) y espectroscopía infrarroja por transformada de Fourier (FTIR). Los resultados mostraron que, a 90 días de curado, la combinación de CR y FA o LFS activada con silicato de sodio produjo valores de UCS superiores a 20 MPa y 59 MPa, respectivamenteFoundation for Science and Technology - FCT/MCTES (PIDDAC), within the framework of the R&D Project “JUSTREST - Development of Alkali Binders for Geotechnical Applications Made Exclusively from Industrial Waste”, reference PTDC/ECM-GEO/0637/2014. The author would also like to acknowledge the support of the Secretary of Higher Education, Figure 8. FTIR spectra of starting materials, the ladle furnace slag (LFS); ceramic residue (MCR) – milled for 32 hours; fly ash (FA), and 75CR-25FA/SH or SS mixtures (M1 and M2) and 75CR-25LFS/SH or SS mixtures (M3 and M4), after 90 days curing time. Science, Technology and Innovation, SENESCYT (Spanish acronym) from Ecuador, reference No. CZ03-000052-2017Consejo Superior de Investigaciones Científicas (CSIC)Universidade do MinhoGaibor, N. Y.Coelho, J.Leitão, DinisMiranda, Tiago F. S.Tavares, P.Cristelo, N.2020-072020-07-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/67479engGaibor N. Y., Coelho J., Leitão D., Miranda T., Tavares P., Cristelo N. Alkali activation of recycled ceramic aggregates from construction and demolition wastes, Journal of Materiales de Construcción, Vol. Vol. 70, Issue Issue 339, doi: 10.3989/mc.2020.13619, 2020.0465-274610.3989/mc.2020.13619http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/2296info: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:RCAAP2023-07-21T12:40:08Zoai:repositorium.sdum.uminho.pt:1822/67479Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:36:53.016667Repositório 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 |
Alkali activation of recycled ceramic aggregates from construction and demolition wastes |
title |
Alkali activation of recycled ceramic aggregates from construction and demolition wastes |
spellingShingle |
Alkali activation of recycled ceramic aggregates from construction and demolition wastes Gaibor, N. Y. Alkali-activated cement Ceramic Mechanical properties Physical properties Waste treatment Cerámica Cemento activado alcalinamente Tratamiento de residuos Propiedades mecánicas Propiedades físicas Engenharia e Tecnologia::Engenharia Civil Science & Technology |
title_short |
Alkali activation of recycled ceramic aggregates from construction and demolition wastes |
title_full |
Alkali activation of recycled ceramic aggregates from construction and demolition wastes |
title_fullStr |
Alkali activation of recycled ceramic aggregates from construction and demolition wastes |
title_full_unstemmed |
Alkali activation of recycled ceramic aggregates from construction and demolition wastes |
title_sort |
Alkali activation of recycled ceramic aggregates from construction and demolition wastes |
author |
Gaibor, N. Y. |
author_facet |
Gaibor, N. Y. Coelho, J. Leitão, Dinis Miranda, Tiago F. S. Tavares, P. Cristelo, N. |
author_role |
author |
author2 |
Coelho, J. Leitão, Dinis Miranda, Tiago F. S. Tavares, P. Cristelo, N. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Gaibor, N. Y. Coelho, J. Leitão, Dinis Miranda, Tiago F. S. Tavares, P. Cristelo, N. |
dc.subject.por.fl_str_mv |
Alkali-activated cement Ceramic Mechanical properties Physical properties Waste treatment Cerámica Cemento activado alcalinamente Tratamiento de residuos Propiedades mecánicas Propiedades físicas Engenharia e Tecnologia::Engenharia Civil Science & Technology |
topic |
Alkali-activated cement Ceramic Mechanical properties Physical properties Waste treatment Cerámica Cemento activado alcalinamente Tratamiento de residuos Propiedades mecánicas Propiedades físicas Engenharia e Tecnologia::Engenharia Civil Science & Technology |
description |
Environmental concerns are becoming increasingly more significant worldwide, thus creating the urgent need for new sustainable alternatives in the industrial sector. The present study assesses the fundamental properties of ceramic residue (CR) originated by demolition operations, specifically, the floor and wall tiles and sanitaryware furniture, for further incorporation in the construction sector, namely in alkali-activated bind- ers, mixed with other better-known precursors - fly ash (FA) and ladle furnace slag (LFS). Different CR/FA and CR/LFS weight ratios were considered and analyzed by mechanical behavior and microstructural analysis, which included uniaxial compression strength (UCS) tests, Scanning Electron Microscopy (SEM), X-ray Energy Dispersive Analyser (EDX), X-ray diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR). Results obtained showed that the combination of CR and FA or LFS, activated with sodium silicate, produced UCS values higher than 20 MPa and 59 MPa, respectively, after 90 days curing. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-07 2020-07-01T00:00:00Z |
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 |
http://hdl.handle.net/1822/67479 |
url |
http://hdl.handle.net/1822/67479 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Gaibor N. Y., Coelho J., Leitão D., Miranda T., Tavares P., Cristelo N. Alkali activation of recycled ceramic aggregates from construction and demolition wastes, Journal of Materiales de Construcción, Vol. Vol. 70, Issue Issue 339, doi: 10.3989/mc.2020.13619, 2020. 0465-2746 10.3989/mc.2020.13619 http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/2296 |
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 |
Consejo Superior de Investigaciones Científicas (CSIC) |
publisher.none.fl_str_mv |
Consejo Superior de Investigaciones Científicas (CSIC) |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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