Biomass ashes to produce an alternative alkaline activator for alkali-activated cements
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.matlet.2021.131198 http://hdl.handle.net/11449/222862 |
Resumo: | In the last decade, herbaceous and agricultural biomass have been used as an alternative energy source. As consequence, large amounts of residual ashes containing potassium (potassium-rich ashes) have been generated. Olive biomass ash (OBA) and almond shell ash (ABA) have been successfully used as alkali source in the alkaline activation of ground granulated blast furnace slag (BFS). This study focuses on the production of new and alternative alkaline activators for BFS systems using nutshell ashes (NBA), mango seed-bark ashes (MBA) and hazelnut shell ashes (HBA). The chemical and mineralogical composition of these ashes were assessed and, the mechanical and microstructural properties of BFS pastes activated with NBA, MBA and HBA were evaluated. The results indicated that all assessed materials are potassium-rich ashes differing mainly on the amount of CaO and P2O5. The compressive strength of BFS pastes yielded about 26 MPa and, according to FESEM/EDS analysis, K2O (in the range 8.03–24.33%) replaces chemical bounded Ca+2, forming C-(K)-A-S-H gel. |
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Biomass ashes to produce an alternative alkaline activator for alkali-activated cementsAlkali-activated cementBiomass ashBlast furnace slagChemical compositionHigh potassium ashesValorisationIn the last decade, herbaceous and agricultural biomass have been used as an alternative energy source. As consequence, large amounts of residual ashes containing potassium (potassium-rich ashes) have been generated. Olive biomass ash (OBA) and almond shell ash (ABA) have been successfully used as alkali source in the alkaline activation of ground granulated blast furnace slag (BFS). This study focuses on the production of new and alternative alkaline activators for BFS systems using nutshell ashes (NBA), mango seed-bark ashes (MBA) and hazelnut shell ashes (HBA). The chemical and mineralogical composition of these ashes were assessed and, the mechanical and microstructural properties of BFS pastes activated with NBA, MBA and HBA were evaluated. The results indicated that all assessed materials are potassium-rich ashes differing mainly on the amount of CaO and P2O5. The compressive strength of BFS pastes yielded about 26 MPa and, according to FESEM/EDS analysis, K2O (in the range 8.03–24.33%) replaces chemical bounded Ca+2, forming C-(K)-A-S-H gel.ICITECH – GIQUIMA Group – Grupo de Investigación en Química de los Materiales de Construcción Instituto de Ciencia y Tecnología del Hormigón Universitat Politècnica de ValenciaUNESP – Grupo de Pesquisa MAC – Materiais Alternativos de Construção Univ Estadual Paulista, Campus de Ilha SolteiraUNESP – Grupo de Pesquisa MAC – Materiais Alternativos de Construção Univ Estadual Paulista, Campus de Ilha SolteiraUniversitat Politècnica de ValenciaUniversidade Estadual Paulista (UNESP)Soriano, L.Font, A.Borrachero, M. V.Monzó, J. M.Payá, J.Tashima, M. M. [UNESP]2022-04-28T19:47:11Z2022-04-28T19:47:11Z2022-02-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.matlet.2021.131198Materials Letters, v. 308.1873-49790167-577Xhttp://hdl.handle.net/11449/22286210.1016/j.matlet.2021.1311982-s2.0-85119076155Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMaterials Lettersinfo:eu-repo/semantics/openAccess2022-04-28T19:47:11Zoai:repositorio.unesp.br:11449/222862Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462022-04-28T19:47:11Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Biomass ashes to produce an alternative alkaline activator for alkali-activated cements |
title |
Biomass ashes to produce an alternative alkaline activator for alkali-activated cements |
spellingShingle |
Biomass ashes to produce an alternative alkaline activator for alkali-activated cements Soriano, L. Alkali-activated cement Biomass ash Blast furnace slag Chemical composition High potassium ashes Valorisation |
title_short |
Biomass ashes to produce an alternative alkaline activator for alkali-activated cements |
title_full |
Biomass ashes to produce an alternative alkaline activator for alkali-activated cements |
title_fullStr |
Biomass ashes to produce an alternative alkaline activator for alkali-activated cements |
title_full_unstemmed |
Biomass ashes to produce an alternative alkaline activator for alkali-activated cements |
title_sort |
Biomass ashes to produce an alternative alkaline activator for alkali-activated cements |
author |
Soriano, L. |
author_facet |
Soriano, L. Font, A. Borrachero, M. V. Monzó, J. M. Payá, J. Tashima, M. M. [UNESP] |
author_role |
author |
author2 |
Font, A. Borrachero, M. V. Monzó, J. M. Payá, J. Tashima, M. M. [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universitat Politècnica de Valencia Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Soriano, L. Font, A. Borrachero, M. V. Monzó, J. M. Payá, J. Tashima, M. M. [UNESP] |
dc.subject.por.fl_str_mv |
Alkali-activated cement Biomass ash Blast furnace slag Chemical composition High potassium ashes Valorisation |
topic |
Alkali-activated cement Biomass ash Blast furnace slag Chemical composition High potassium ashes Valorisation |
description |
In the last decade, herbaceous and agricultural biomass have been used as an alternative energy source. As consequence, large amounts of residual ashes containing potassium (potassium-rich ashes) have been generated. Olive biomass ash (OBA) and almond shell ash (ABA) have been successfully used as alkali source in the alkaline activation of ground granulated blast furnace slag (BFS). This study focuses on the production of new and alternative alkaline activators for BFS systems using nutshell ashes (NBA), mango seed-bark ashes (MBA) and hazelnut shell ashes (HBA). The chemical and mineralogical composition of these ashes were assessed and, the mechanical and microstructural properties of BFS pastes activated with NBA, MBA and HBA were evaluated. The results indicated that all assessed materials are potassium-rich ashes differing mainly on the amount of CaO and P2O5. The compressive strength of BFS pastes yielded about 26 MPa and, according to FESEM/EDS analysis, K2O (in the range 8.03–24.33%) replaces chemical bounded Ca+2, forming C-(K)-A-S-H gel. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-04-28T19:47:11Z 2022-04-28T19:47:11Z 2022-02-01 |
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://dx.doi.org/10.1016/j.matlet.2021.131198 Materials Letters, v. 308. 1873-4979 0167-577X http://hdl.handle.net/11449/222862 10.1016/j.matlet.2021.131198 2-s2.0-85119076155 |
url |
http://dx.doi.org/10.1016/j.matlet.2021.131198 http://hdl.handle.net/11449/222862 |
identifier_str_mv |
Materials Letters, v. 308. 1873-4979 0167-577X 10.1016/j.matlet.2021.131198 2-s2.0-85119076155 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Materials Letters |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799965576308719616 |