Municipal solid waste incineration bottom ash as sole precursor in the alkali-activated binder formulation

The concern about the large amount of weathered bottom ash (WBA) produced in waste-to-energy plants (WtE) has caused an increased search for alternatives to reduce their environmental impact. The present study aims to provide an added value through the WBA valorization from municipal solid waste inc...

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Autores: Maldonado Alameda, Alex, Giró Paloma, Jessica, Alfocea Roig, Anna, Formosa Mitjans, Joan, Chimenos Ribera, Josep Ma.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/167640
Acceso en línea:https://hdl.handle.net/2445/167640
Access Level:acceso abierto
Palabra clave:Residus
Incineració
Eliminació de residus
Waste products
Incineration
Refuse and refuse disposal
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spelling Municipal solid waste incineration bottom ash as sole precursor in the alkali-activated binder formulationMaldonado Alameda, AlexGiró Paloma, JessicaAlfocea Roig, AnnaFormosa Mitjans, JoanChimenos Ribera, Josep Ma.ResidusIncineracióEliminació de residusWaste productsIncinerationRefuse and refuse disposalThe concern about the large amount of weathered bottom ash (WBA) produced in waste-to-energy plants (WtE) has caused an increased search for alternatives to reduce their environmental impact. The present study aims to provide an added value through the WBA valorization from municipal solid waste incineration (MSWI) for its use as a sole precursor for developing alkali-activated binders (AABs). Alkali-activated weathered bottom ash binders (AA-WBA) were formulated with a liquid-to-solid ratio of 1.0 and using sodium silicate (80 wt.%) and NaOH (20 wt.%) at different concentrations (2, 4, 6, and 8M) as alkali-activator solutions. AA-WBA were cured at room temperature to extend their applicability. The effect of the alkali-activator solution molarity on the final properties of the AA-WBA was evaluated. The physicochemical characterization by XRD, FTIR, and SEM evidenced the presence of the typical phases (calcium silicate hydrate and gehlenite) of C-(A)-S-H gel. Leaching concentrations of As, Cu, and Mo exceed the acceptance in landfills for inert waste, while the leaching concentration of Sb exceeds the one for non-hazardous waste. The structure of the binders depends on the alkalinity of the activator, obtaining better results using NaOH 6M in terms of microstructure and compressive strength (6.7 MPa). The present study revealed that AA-WBA for non-structural purposes can be obtained. The AA-WBA formulation contributes to the WBA valorization and development of low-carbon cements; therefore, it is an encouraged alternative to ordinary Portland cement (OPC). Considering the amounts and costs of the WBA, sodium silicate, NaOH, and wateMDPI2020202020202020info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion15 p.application/pdfhttps://hdl.handle.net/2445/167640Articles publicats en revistes (Ciència dels Materials i Química Física)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.3390/app10124129Applied Sciences, 2020, vol. 10, num. 12, p. 4129https://doi.org/10.3390/app10124129cc-by (c) Maldonado Alameda, Alex et al., 2020http://creativecommons.org/licenses/by/3.0/esinfo:eu-repo/semantics/openAccessoai:recercat.cat:2445/1676402026-05-29T05:05:01Z
dc.title.none.fl_str_mv Municipal solid waste incineration bottom ash as sole precursor in the alkali-activated binder formulation
title Municipal solid waste incineration bottom ash as sole precursor in the alkali-activated binder formulation
spellingShingle Municipal solid waste incineration bottom ash as sole precursor in the alkali-activated binder formulation
Maldonado Alameda, Alex
Residus
Incineració
Eliminació de residus
Waste products
Incineration
Refuse and refuse disposal
title_short Municipal solid waste incineration bottom ash as sole precursor in the alkali-activated binder formulation
title_full Municipal solid waste incineration bottom ash as sole precursor in the alkali-activated binder formulation
title_fullStr Municipal solid waste incineration bottom ash as sole precursor in the alkali-activated binder formulation
title_full_unstemmed Municipal solid waste incineration bottom ash as sole precursor in the alkali-activated binder formulation
title_sort Municipal solid waste incineration bottom ash as sole precursor in the alkali-activated binder formulation
dc.creator.none.fl_str_mv Maldonado Alameda, Alex
Giró Paloma, Jessica
Alfocea Roig, Anna
Formosa Mitjans, Joan
Chimenos Ribera, Josep Ma.
author Maldonado Alameda, Alex
author_facet Maldonado Alameda, Alex
Giró Paloma, Jessica
Alfocea Roig, Anna
Formosa Mitjans, Joan
Chimenos Ribera, Josep Ma.
author_role author
author2 Giró Paloma, Jessica
Alfocea Roig, Anna
Formosa Mitjans, Joan
Chimenos Ribera, Josep Ma.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Residus
Incineració
Eliminació de residus
Waste products
Incineration
Refuse and refuse disposal
topic Residus
Incineració
Eliminació de residus
Waste products
Incineration
Refuse and refuse disposal
description The concern about the large amount of weathered bottom ash (WBA) produced in waste-to-energy plants (WtE) has caused an increased search for alternatives to reduce their environmental impact. The present study aims to provide an added value through the WBA valorization from municipal solid waste incineration (MSWI) for its use as a sole precursor for developing alkali-activated binders (AABs). Alkali-activated weathered bottom ash binders (AA-WBA) were formulated with a liquid-to-solid ratio of 1.0 and using sodium silicate (80 wt.%) and NaOH (20 wt.%) at different concentrations (2, 4, 6, and 8M) as alkali-activator solutions. AA-WBA were cured at room temperature to extend their applicability. The effect of the alkali-activator solution molarity on the final properties of the AA-WBA was evaluated. The physicochemical characterization by XRD, FTIR, and SEM evidenced the presence of the typical phases (calcium silicate hydrate and gehlenite) of C-(A)-S-H gel. Leaching concentrations of As, Cu, and Mo exceed the acceptance in landfills for inert waste, while the leaching concentration of Sb exceeds the one for non-hazardous waste. The structure of the binders depends on the alkalinity of the activator, obtaining better results using NaOH 6M in terms of microstructure and compressive strength (6.7 MPa). The present study revealed that AA-WBA for non-structural purposes can be obtained. The AA-WBA formulation contributes to the WBA valorization and development of low-carbon cements; therefore, it is an encouraged alternative to ordinary Portland cement (OPC). Considering the amounts and costs of the WBA, sodium silicate, NaOH, and wate
publishDate 2020
dc.date.none.fl_str_mv 2020
2020
2020
2020
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/2445/167640
url https://hdl.handle.net/2445/167640
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/10.3390/app10124129
Applied Sciences, 2020, vol. 10, num. 12, p. 4129
https://doi.org/10.3390/app10124129
dc.rights.none.fl_str_mv cc-by (c) Maldonado Alameda, Alex et al., 2020
http://creativecommons.org/licenses/by/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Maldonado Alameda, Alex et al., 2020
http://creativecommons.org/licenses/by/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 15 p.
application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv Articles publicats en revistes (Ciència dels Materials i Química Física)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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