Increasing the reaction kinetics of alkali-activated fly ash binders for stabilisation of a silty sand pavement sub-base

Detalhes bibliográficos
Autor(a) principal: Sara Rios
Data de Publicação: 2018
Outros Autores: Nuno Cristelo, Tiago Miranda, Nuno Araújo, Joel Oliveira
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://hdl.handle.net/10216/115711
Resumo: The paper addresses several options to improve the reaction kinetics of alkali-activated low-calcium fly ash binders for soil stabilisation in road platforms. For that purpose, an experimental programme was established to assess the strength evolution, with time, of different binders, based on ash, lime, sodium chloride and alkali solutions, applied in the stabilisation of a silty sand. The tests included unconfined compression strength tests, triaxial tests and seismic wave measurements performed at different curing periods. The results were compared with a binder made of Portland cement and a commercial additive specifically designed for soil stabilisation in road applications. The activated ash mixtures with lime were the most performing producing a significant increase in the reactions development and, consequently, in the strength gain rate. The sodium chloride significantly improved the lime and lime-ash mixtures, but provided only a slight improvement in the activated ash mixtures.
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spelling Increasing the reaction kinetics of alkali-activated fly ash binders for stabilisation of a silty sand pavement sub-baseThe paper addresses several options to improve the reaction kinetics of alkali-activated low-calcium fly ash binders for soil stabilisation in road platforms. For that purpose, an experimental programme was established to assess the strength evolution, with time, of different binders, based on ash, lime, sodium chloride and alkali solutions, applied in the stabilisation of a silty sand. The tests included unconfined compression strength tests, triaxial tests and seismic wave measurements performed at different curing periods. The results were compared with a binder made of Portland cement and a commercial additive specifically designed for soil stabilisation in road applications. The activated ash mixtures with lime were the most performing producing a significant increase in the reactions development and, consequently, in the strength gain rate. The sodium chloride significantly improved the lime and lime-ash mixtures, but provided only a slight improvement in the activated ash mixtures.20182018-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/10216/115711eng1468-062910.1080/14680629.2016.1251959Sara RiosNuno CristeloTiago MirandaNuno AraújoJoel Oliveirainfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-29T14:35:48Zoai:repositorio-aberto.up.pt:10216/115711Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T00:04:46.433281Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Increasing the reaction kinetics of alkali-activated fly ash binders for stabilisation of a silty sand pavement sub-base
title Increasing the reaction kinetics of alkali-activated fly ash binders for stabilisation of a silty sand pavement sub-base
spellingShingle Increasing the reaction kinetics of alkali-activated fly ash binders for stabilisation of a silty sand pavement sub-base
Sara Rios
title_short Increasing the reaction kinetics of alkali-activated fly ash binders for stabilisation of a silty sand pavement sub-base
title_full Increasing the reaction kinetics of alkali-activated fly ash binders for stabilisation of a silty sand pavement sub-base
title_fullStr Increasing the reaction kinetics of alkali-activated fly ash binders for stabilisation of a silty sand pavement sub-base
title_full_unstemmed Increasing the reaction kinetics of alkali-activated fly ash binders for stabilisation of a silty sand pavement sub-base
title_sort Increasing the reaction kinetics of alkali-activated fly ash binders for stabilisation of a silty sand pavement sub-base
author Sara Rios
author_facet Sara Rios
Nuno Cristelo
Tiago Miranda
Nuno Araújo
Joel Oliveira
author_role author
author2 Nuno Cristelo
Tiago Miranda
Nuno Araújo
Joel Oliveira
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Sara Rios
Nuno Cristelo
Tiago Miranda
Nuno Araújo
Joel Oliveira
description The paper addresses several options to improve the reaction kinetics of alkali-activated low-calcium fly ash binders for soil stabilisation in road platforms. For that purpose, an experimental programme was established to assess the strength evolution, with time, of different binders, based on ash, lime, sodium chloride and alkali solutions, applied in the stabilisation of a silty sand. The tests included unconfined compression strength tests, triaxial tests and seismic wave measurements performed at different curing periods. The results were compared with a binder made of Portland cement and a commercial additive specifically designed for soil stabilisation in road applications. The activated ash mixtures with lime were the most performing producing a significant increase in the reactions development and, consequently, in the strength gain rate. The sodium chloride significantly improved the lime and lime-ash mixtures, but provided only a slight improvement in the activated ash mixtures.
publishDate 2018
dc.date.none.fl_str_mv 2018
2018-01-01T00:00:00Z
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 https://hdl.handle.net/10216/115711
url https://hdl.handle.net/10216/115711
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 1468-0629
10.1080/14680629.2016.1251959
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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