Production of a highly pozzolanic sugarcane bagasse ash via densimetric fractionation and ultrafine grinding

Detalhes bibliográficos
Autor(a) principal: Cordeiro,Guilherme Chagas
Data de Publicação: 2022
Outros Autores: FernandesLinhares,Beatriz Dias, Lemos,Mônica Nunes
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Ambiente construído (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-86212022000400049
Resumo: Abstract Sugarcane bagasse ash is a by-product produced by the energy cogeneration from biomass burning. Different processes can be applied to this material to adapt its chemical and physical characteristics to its use as pozzolan. This work aims to evaluate the effectiveness of the densimetric fractionation process in production of sugarcane bagasse ash with high pozzolanicity. Initially, a quartz-rich ash was collected in an industrial boiler and subjected to densimetric fractionation to remove the quartz particles through decantation. Then, the potentially pozzolanic ash portion was subjected to ultrafine grinding. The results showed high amorphous content (94.8%) in the ash after fractionation. Electrical conductivity and performance index tests confirmed the adequate pozzolanicity of the processed ashes. In addition, cement-based pastes with 20% cement replacement by bagasse ash (in mass) showed a reduction in the heat of hydration. Thus, the densimetric fractionation was efficient in producing a material with high reactivity compared to the original ash due to the reduction of contaminants and, consequently, the increase in the amorphous silica concentration.
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spelling Production of a highly pozzolanic sugarcane bagasse ash via densimetric fractionation and ultrafine grindingSugarcane bagasse ashPozzolanDensimetric fractionationUltrafine grindingPozzolanic activityAbstract Sugarcane bagasse ash is a by-product produced by the energy cogeneration from biomass burning. Different processes can be applied to this material to adapt its chemical and physical characteristics to its use as pozzolan. This work aims to evaluate the effectiveness of the densimetric fractionation process in production of sugarcane bagasse ash with high pozzolanicity. Initially, a quartz-rich ash was collected in an industrial boiler and subjected to densimetric fractionation to remove the quartz particles through decantation. Then, the potentially pozzolanic ash portion was subjected to ultrafine grinding. The results showed high amorphous content (94.8%) in the ash after fractionation. Electrical conductivity and performance index tests confirmed the adequate pozzolanicity of the processed ashes. In addition, cement-based pastes with 20% cement replacement by bagasse ash (in mass) showed a reduction in the heat of hydration. Thus, the densimetric fractionation was efficient in producing a material with high reactivity compared to the original ash due to the reduction of contaminants and, consequently, the increase in the amorphous silica concentration.Associação Nacional de Tecnologia do Ambiente Construído - ANTAC2022-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-86212022000400049Ambiente Construído v.22 n.4 2022reponame:Ambiente construído (Online)instname:Associação Nacional de Tecnologia do Ambiente Construído (ANTAC)instacron:ANTAC10.1590/s1678-86212022000400627info:eu-repo/semantics/openAccessCordeiro,Guilherme ChagasFernandesLinhares,Beatriz DiasLemos,Mônica Nuneseng2022-09-05T00:00:00Zoai:scielo:S1678-86212022000400049Revistahttps://seer.ufrgs.br/ambienteconstruidohttps://old.scielo.br/oai/scielo-oai.php||ambienteconstruido@ufrgs.br1678-86211415-8876opendoar:2022-09-05T00:00Ambiente construído (Online) - Associação Nacional de Tecnologia do Ambiente Construído (ANTAC)false
dc.title.none.fl_str_mv Production of a highly pozzolanic sugarcane bagasse ash via densimetric fractionation and ultrafine grinding
title Production of a highly pozzolanic sugarcane bagasse ash via densimetric fractionation and ultrafine grinding
spellingShingle Production of a highly pozzolanic sugarcane bagasse ash via densimetric fractionation and ultrafine grinding
Cordeiro,Guilherme Chagas
Sugarcane bagasse ash
Pozzolan
Densimetric fractionation
Ultrafine grinding
Pozzolanic activity
title_short Production of a highly pozzolanic sugarcane bagasse ash via densimetric fractionation and ultrafine grinding
title_full Production of a highly pozzolanic sugarcane bagasse ash via densimetric fractionation and ultrafine grinding
title_fullStr Production of a highly pozzolanic sugarcane bagasse ash via densimetric fractionation and ultrafine grinding
title_full_unstemmed Production of a highly pozzolanic sugarcane bagasse ash via densimetric fractionation and ultrafine grinding
title_sort Production of a highly pozzolanic sugarcane bagasse ash via densimetric fractionation and ultrafine grinding
author Cordeiro,Guilherme Chagas
author_facet Cordeiro,Guilherme Chagas
FernandesLinhares,Beatriz Dias
Lemos,Mônica Nunes
author_role author
author2 FernandesLinhares,Beatriz Dias
Lemos,Mônica Nunes
author2_role author
author
dc.contributor.author.fl_str_mv Cordeiro,Guilherme Chagas
FernandesLinhares,Beatriz Dias
Lemos,Mônica Nunes
dc.subject.por.fl_str_mv Sugarcane bagasse ash
Pozzolan
Densimetric fractionation
Ultrafine grinding
Pozzolanic activity
topic Sugarcane bagasse ash
Pozzolan
Densimetric fractionation
Ultrafine grinding
Pozzolanic activity
description Abstract Sugarcane bagasse ash is a by-product produced by the energy cogeneration from biomass burning. Different processes can be applied to this material to adapt its chemical and physical characteristics to its use as pozzolan. This work aims to evaluate the effectiveness of the densimetric fractionation process in production of sugarcane bagasse ash with high pozzolanicity. Initially, a quartz-rich ash was collected in an industrial boiler and subjected to densimetric fractionation to remove the quartz particles through decantation. Then, the potentially pozzolanic ash portion was subjected to ultrafine grinding. The results showed high amorphous content (94.8%) in the ash after fractionation. Electrical conductivity and performance index tests confirmed the adequate pozzolanicity of the processed ashes. In addition, cement-based pastes with 20% cement replacement by bagasse ash (in mass) showed a reduction in the heat of hydration. Thus, the densimetric fractionation was efficient in producing a material with high reactivity compared to the original ash due to the reduction of contaminants and, consequently, the increase in the amorphous silica concentration.
publishDate 2022
dc.date.none.fl_str_mv 2022-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-86212022000400049
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-86212022000400049
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/s1678-86212022000400627
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Associação Nacional de Tecnologia do Ambiente Construído - ANTAC
publisher.none.fl_str_mv Associação Nacional de Tecnologia do Ambiente Construído - ANTAC
dc.source.none.fl_str_mv Ambiente Construído v.22 n.4 2022
reponame:Ambiente construído (Online)
instname:Associação Nacional de Tecnologia do Ambiente Construído (ANTAC)
instacron:ANTAC
instname_str Associação Nacional de Tecnologia do Ambiente Construído (ANTAC)
instacron_str ANTAC
institution ANTAC
reponame_str Ambiente construído (Online)
collection Ambiente construído (Online)
repository.name.fl_str_mv Ambiente construído (Online) - Associação Nacional de Tecnologia do Ambiente Construído (ANTAC)
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