Production of a highly pozzolanic sugarcane bagasse ash via densimetric fractionation and ultrafine grinding
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , |
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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Ambiente construído (Online) |
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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) |
repository.mail.fl_str_mv |
||ambienteconstruido@ufrgs.br |
_version_ |
1754209105342365696 |