Sustainable portland cement alternative: alkaline activation of ladle furnace slag as a precursor for eco-friendly building materials

This material may be downloaded for personal use only. Any other use requires prior permission of the American Society of Civil Engineers. This material may be found at https://ascelibrary.org/doi/10.1061/JMCEE7.MTENG-18856.

Detalles Bibliográficos
Autores: Araos Henríquez, Paulo Sebastián|||0000-0003-4064-2828, Aponte Hernández, Diego Fernando|||0000-0001-5737-7819, Lavin Serrano, Roberto, Barra Bizinotto, Marilda|||0000-0002-1417-1615
Tipo de recurso: artículo
Fecha de publicación:2025
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/426437
Acceso en línea:https://hdl.handle.net/2117/426437
https://dx.doi.org/10.1061/JMCEE7.MTENG-18856
Access Level:acceso abierto
Palabra clave:Ladle furnace slag
Alkali-activated materials
Compressive strength
Volume instability
Microstructural characterization
Àrees temàtiques de la UPC::Enginyeria civil::Materials i estructures
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spelling Sustainable portland cement alternative: alkaline activation of ladle furnace slag as a precursor for eco-friendly building materialsAraos Henríquez, Paulo Sebastián|||0000-0003-4064-2828Aponte Hernández, Diego Fernando|||0000-0001-5737-7819Lavin Serrano, RobertoBarra Bizinotto, Marilda|||0000-0002-1417-1615Ladle furnace slagAlkali-activated materialsCompressive strengthVolume instabilityMicrostructural characterizationÀrees temàtiques de la UPC::Enginyeria civil::Materials i estructuresThis material may be downloaded for personal use only. Any other use requires prior permission of the American Society of Civil Engineers. This material may be found at https://ascelibrary.org/doi/10.1061/JMCEE7.MTENG-18856.Portland cement (OPC) and steelmaking industries exhibit high production levels, and their industrial processes are not considered environmentally friendly, generating approximately 4%–7% of CO2 emissions worldwide. Both industries introduced several improvements in their industrial processes; however, the steelmaking industry still generates large volumes of solid waste. Ladle furnace slag (LFS), one of these residues, shows exciting properties to be used as part of the next generation of sustainable building materials. However, due to technological barriers in its valorization process, its final destination is landfilling. This article explores a safe and high-value application to valorize LFS as a high calcium content precursor in alkaline-activated (AA) systems, focusing on the effect of the SiO2/Na2¿O molar ratio of the activator, defined as the activator module (Ms), on physical-mechanical performance, volumetric instability, and the microstructure evolution. The microstructural characterization (chemical/mineralogical qualitative and quantitative) of the raw/activated samples using different techniques [X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), and Raman] of the raw/activated samples, compressive strength, and volumetric instability tests were evaluated. Our results show low mechanical performance, reaching compressive strength values up to 11.5 MPa after 60 days. LFS mineralogical characterization reveals the feasibility of activating the LFS and the formation of a CASH-type gel with a high degree of polymerization (up to Q4 units). Therefore, LFS presents an interesting potential as a high-Ca content precursor in AA systems for potential use in low-strength cement-based formulations.Peer ReviewedObjectius de Desenvolupament Sostenible::11 - Ciutats i Comunitats SosteniblesObjectius de Desenvolupament Sostenible::11 - Ciutats i Comunitats Sostenibles::11.6 - Per a 2030, reduir l’impacte ambiental negatiu per capita de les ciutats, amb especial atenció a la qualitat de l’aire, així com a la gestió dels residus municipals i d’altre tipusObjectius de Desenvolupament Sostenible::12 - Producció i Consum ResponsablesObjectius de Desenvolupament Sostenible::12 - Producció i Consum Responsables::12.5 - Per a 2030, disminuir de manera substancial la generació de residus mitjançant polítiques de prevenció, reducció, reciclatge i reutilització20252025-05-0120252025-03-13journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/426437https://dx.doi.org/10.1061/JMCEE7.MTENG-18856reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/4264372026-05-27T15:37:01Z
dc.title.none.fl_str_mv Sustainable portland cement alternative: alkaline activation of ladle furnace slag as a precursor for eco-friendly building materials
title Sustainable portland cement alternative: alkaline activation of ladle furnace slag as a precursor for eco-friendly building materials
spellingShingle Sustainable portland cement alternative: alkaline activation of ladle furnace slag as a precursor for eco-friendly building materials
Araos Henríquez, Paulo Sebastián|||0000-0003-4064-2828
Ladle furnace slag
Alkali-activated materials
Compressive strength
Volume instability
Microstructural characterization
Àrees temàtiques de la UPC::Enginyeria civil::Materials i estructures
title_short Sustainable portland cement alternative: alkaline activation of ladle furnace slag as a precursor for eco-friendly building materials
title_full Sustainable portland cement alternative: alkaline activation of ladle furnace slag as a precursor for eco-friendly building materials
title_fullStr Sustainable portland cement alternative: alkaline activation of ladle furnace slag as a precursor for eco-friendly building materials
title_full_unstemmed Sustainable portland cement alternative: alkaline activation of ladle furnace slag as a precursor for eco-friendly building materials
title_sort Sustainable portland cement alternative: alkaline activation of ladle furnace slag as a precursor for eco-friendly building materials
dc.creator.none.fl_str_mv Araos Henríquez, Paulo Sebastián|||0000-0003-4064-2828
Aponte Hernández, Diego Fernando|||0000-0001-5737-7819
Lavin Serrano, Roberto
Barra Bizinotto, Marilda|||0000-0002-1417-1615
author Araos Henríquez, Paulo Sebastián|||0000-0003-4064-2828
author_facet Araos Henríquez, Paulo Sebastián|||0000-0003-4064-2828
Aponte Hernández, Diego Fernando|||0000-0001-5737-7819
Lavin Serrano, Roberto
Barra Bizinotto, Marilda|||0000-0002-1417-1615
author_role author
author2 Aponte Hernández, Diego Fernando|||0000-0001-5737-7819
Lavin Serrano, Roberto
Barra Bizinotto, Marilda|||0000-0002-1417-1615
author2_role author
author
author
dc.subject.none.fl_str_mv Ladle furnace slag
Alkali-activated materials
Compressive strength
Volume instability
Microstructural characterization
Àrees temàtiques de la UPC::Enginyeria civil::Materials i estructures
topic Ladle furnace slag
Alkali-activated materials
Compressive strength
Volume instability
Microstructural characterization
Àrees temàtiques de la UPC::Enginyeria civil::Materials i estructures
description This material may be downloaded for personal use only. Any other use requires prior permission of the American Society of Civil Engineers. This material may be found at https://ascelibrary.org/doi/10.1061/JMCEE7.MTENG-18856.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025-05-01
2025
2025-03-13
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/426437
https://dx.doi.org/10.1061/JMCEE7.MTENG-18856
url https://hdl.handle.net/2117/426437
https://dx.doi.org/10.1061/JMCEE7.MTENG-18856
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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