Comparative study of alkali activated cements based on metallurgical slags, in terms of technological properties developed

In this work, an investigation on the use of two slags from different origins (electric arc furnace slag (EAFS) and copper slag (CS)) as raw materials in the manufacture of alkali-activated cements has been carried out. A comparison of the different mechanical properties developed by the alkaline ac...

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Autores: Gómez-Casero, Miguel Ángel, Pérez-Villarejo, Luis, Sánchez-Soto, Pedro José, Eliche-Quesada, Dolores
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Institución:Universidad de Jaén
Repositorio:RUJA. Repositorio Institucional de la Producción Científica de la Universidad de Jaén
OAI Identifier:oai:ruja.ujaen.es:10953/6094
Acceso en línea:https://hdl.handle.net/10953/6094
Access Level:acceso abierto
Palabra clave:Alkali activated cements
Steel slag
Copper slags
Circular economy
69
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spelling Comparative study of alkali activated cements based on metallurgical slags, in terms of technological properties developedGómez-Casero, Miguel ÁngelPérez-Villarejo, LuisSánchez-Soto, Pedro JoséEliche-Quesada, DoloresAlkali activated cementsSteel slagCopper slagsCircular economy69In this work, an investigation on the use of two slags from different origins (electric arc furnace slag (EAFS) and copper slag (CS)) as raw materials in the manufacture of alkali-activated cements has been carried out. A comparison of the different mechanical properties developed by the alkaline activation of each raw material has been studied. Combination of 35 wt% potassium hydroxide (KOH) solution with different concentration (5, 8, 12 and 15 M) and 65 wt% potassium silicate (K2SiO3) solution was used as activating solution to manufacture alkali activated cements. The pastes were cured 24 h in a climatic chamber at 20 °C at 90% of relative humidity, subsequently demoulded and cured at same condition during 1, 7, 28 and 90 days. Alkali activated materials have been characterized using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The physical properties: bulk density, water absorption and apparent porosity, mechanical properties, flexural strength and compressive strength and thermal properties: thermal conductivity have been determined. The results indicate that two types of slags studied are a suitable source of aluminosilicates that can be activated for the manufacture of alkali-activated materials. These precursors are capable of developing high values of flexural and compressive strength and low values of thermal conductivity when optimal concentration of KOH was used. The optimal composition was developed when CS was utilized. Binders with CS and 12 M M ratio achieved compressive strength values up to 70 MPa.This work has been funded by the project Development and characterization of new geopolymeric composites based on waste from the olive industry. Towards a sustainable construction (MAT2017-88097-R), FEDER/Ministry of Science, Innovation and Universities, State Research Agency; and by the project PID2020-115161RB-I00: Applying the circular economy in the development of new low carbon footprint alkaline activated hydraulic binders for construction solutions (CongActiva), MCIN/AEI/10.13039/501100011033 FEDER “A way of making Europe”. Authors thank Siderúrgica Sevillana company and Atlantic Copper company for supplying slags. M.A. Gómez-Casero acknowledges support of MINECO (PRE2018-084073).Elsevier202520252022info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/10953/6094reponame:RUJA. Repositorio Institucional de la Producción Científica de la Universidad de Jaéninstname:Universidad de JaénInglésSustainable Chemistry and Pharmacy, 29, 100746Attribution-NonCommercial-NoDerivs 3.0 Spainhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:ruja.ujaen.es:10953/60942026-06-24T12:41:07Z
dc.title.none.fl_str_mv Comparative study of alkali activated cements based on metallurgical slags, in terms of technological properties developed
title Comparative study of alkali activated cements based on metallurgical slags, in terms of technological properties developed
spellingShingle Comparative study of alkali activated cements based on metallurgical slags, in terms of technological properties developed
Gómez-Casero, Miguel Ángel
Alkali activated cements
Steel slag
Copper slags
Circular economy
69
title_short Comparative study of alkali activated cements based on metallurgical slags, in terms of technological properties developed
title_full Comparative study of alkali activated cements based on metallurgical slags, in terms of technological properties developed
title_fullStr Comparative study of alkali activated cements based on metallurgical slags, in terms of technological properties developed
title_full_unstemmed Comparative study of alkali activated cements based on metallurgical slags, in terms of technological properties developed
title_sort Comparative study of alkali activated cements based on metallurgical slags, in terms of technological properties developed
dc.creator.none.fl_str_mv Gómez-Casero, Miguel Ángel
Pérez-Villarejo, Luis
Sánchez-Soto, Pedro José
Eliche-Quesada, Dolores
author Gómez-Casero, Miguel Ángel
author_facet Gómez-Casero, Miguel Ángel
Pérez-Villarejo, Luis
Sánchez-Soto, Pedro José
Eliche-Quesada, Dolores
author_role author
author2 Pérez-Villarejo, Luis
Sánchez-Soto, Pedro José
Eliche-Quesada, Dolores
author2_role author
author
author
dc.subject.none.fl_str_mv Alkali activated cements
Steel slag
Copper slags
Circular economy
69
topic Alkali activated cements
Steel slag
Copper slags
Circular economy
69
description In this work, an investigation on the use of two slags from different origins (electric arc furnace slag (EAFS) and copper slag (CS)) as raw materials in the manufacture of alkali-activated cements has been carried out. A comparison of the different mechanical properties developed by the alkaline activation of each raw material has been studied. Combination of 35 wt% potassium hydroxide (KOH) solution with different concentration (5, 8, 12 and 15 M) and 65 wt% potassium silicate (K2SiO3) solution was used as activating solution to manufacture alkali activated cements. The pastes were cured 24 h in a climatic chamber at 20 °C at 90% of relative humidity, subsequently demoulded and cured at same condition during 1, 7, 28 and 90 days. Alkali activated materials have been characterized using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The physical properties: bulk density, water absorption and apparent porosity, mechanical properties, flexural strength and compressive strength and thermal properties: thermal conductivity have been determined. The results indicate that two types of slags studied are a suitable source of aluminosilicates that can be activated for the manufacture of alkali-activated materials. These precursors are capable of developing high values of flexural and compressive strength and low values of thermal conductivity when optimal concentration of KOH was used. The optimal composition was developed when CS was utilized. Binders with CS and 12 M M ratio achieved compressive strength values up to 70 MPa.
publishDate 2022
dc.date.none.fl_str_mv 2022
2025
2025
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/10953/6094
url https://hdl.handle.net/10953/6094
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Sustainable Chemistry and Pharmacy, 29, 100746
dc.rights.none.fl_str_mv Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:RUJA. Repositorio Institucional de la Producción Científica de la Universidad de Jaén
instname:Universidad de Jaén
instname_str Universidad de Jaén
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collection RUJA. Repositorio Institucional de la Producción Científica de la Universidad de Jaén
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