Improvement of a clayey soil with alkali activated low-calcium fly ash for transport infrastructures applications
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/60909 |
Resumo: | The improvement of geotechnical properties is often achieved by the addition of traditional binders, such as cement or lime. However, the use of such binders implies a considerable financial and environmental cost that needs to be mitigated. An unconventional solution, similar to cement in terms of performance but more environmentally friendly, consists in the use of binders made from alkaline activated industrial residues. The technique consists on the activation of raw materials (such as fly ash or blast furnace slag) rich in Si, Al, or even Ca, with high pH alkaline solutions. The present work was developed aiming the possible stabilisation, using different fly ash contents, of a clayey soil with sand. The activator solution was composed of sodium hydroxide and sodium silicate. The extended experimental campaign included unconfined compressive strength (UCS), California Bearing Ratio (CBR), pulse velocity tests and triaxial tests to assess the geomechanical improvement induced by the new binder. As a mean of comparison, the experimental campaign included also the stabilisation of the same soil with either cement or lime. The obtained data indicates that the use of alkaline activation as a soil stabilisation technique provides competitive geomechanical results, when compared with those obtained with traditional binders. |
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Improvement of a clayey soil with alkali activated low-calcium fly ash for transport infrastructures applicationsSoil stabilizationAlkaline activationFly ashCement binderLime binderGeomechanical characterizationsoil stabilisationgeomechanical characterisationEngenharia e Tecnologia::Engenharia CivilScience & TechnologyThe improvement of geotechnical properties is often achieved by the addition of traditional binders, such as cement or lime. However, the use of such binders implies a considerable financial and environmental cost that needs to be mitigated. An unconventional solution, similar to cement in terms of performance but more environmentally friendly, consists in the use of binders made from alkaline activated industrial residues. The technique consists on the activation of raw materials (such as fly ash or blast furnace slag) rich in Si, Al, or even Ca, with high pH alkaline solutions. The present work was developed aiming the possible stabilisation, using different fly ash contents, of a clayey soil with sand. The activator solution was composed of sodium hydroxide and sodium silicate. The extended experimental campaign included unconfined compressive strength (UCS), California Bearing Ratio (CBR), pulse velocity tests and triaxial tests to assess the geomechanical improvement induced by the new binder. As a mean of comparison, the experimental campaign included also the stabilisation of the same soil with either cement or lime. The obtained data indicates that the use of alkaline activation as a soil stabilisation technique provides competitive geomechanical results, when compared with those obtained with traditional binders.(undefined)Taylor & FrancisUniversidade do MinhoSilva, Manuela Corrêa AlvesAraújo, Nuno Miguel FariaCristelo, N.Miranda, Tiago F. S.Gomes, António TopaCoelho, João20192019-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/60909engCorrêa-Silva, M., Araújo, N., Cristelo, N., Miranda, T., Gomes, A. T., & Coelho, J. (2018). Improvement of a clayey soil with alkali activated low-calcium fly ash for transport infrastructures applications. Road Materials and Pavement Design, 1-15.97811381966981468-062910.1080/14680629.2018.1473286https://www.tandfonline.com/doi/full/10.1080/14680629.2018.1473286info: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:RCAAP2023-07-21T12:53:03Zoai:repositorium.sdum.uminho.pt:1822/60909Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:52:18.875809Repositório 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 |
Improvement of a clayey soil with alkali activated low-calcium fly ash for transport infrastructures applications |
title |
Improvement of a clayey soil with alkali activated low-calcium fly ash for transport infrastructures applications |
spellingShingle |
Improvement of a clayey soil with alkali activated low-calcium fly ash for transport infrastructures applications Silva, Manuela Corrêa Alves Soil stabilization Alkaline activation Fly ash Cement binder Lime binder Geomechanical characterization soil stabilisation geomechanical characterisation Engenharia e Tecnologia::Engenharia Civil Science & Technology |
title_short |
Improvement of a clayey soil with alkali activated low-calcium fly ash for transport infrastructures applications |
title_full |
Improvement of a clayey soil with alkali activated low-calcium fly ash for transport infrastructures applications |
title_fullStr |
Improvement of a clayey soil with alkali activated low-calcium fly ash for transport infrastructures applications |
title_full_unstemmed |
Improvement of a clayey soil with alkali activated low-calcium fly ash for transport infrastructures applications |
title_sort |
Improvement of a clayey soil with alkali activated low-calcium fly ash for transport infrastructures applications |
author |
Silva, Manuela Corrêa Alves |
author_facet |
Silva, Manuela Corrêa Alves Araújo, Nuno Miguel Faria Cristelo, N. Miranda, Tiago F. S. Gomes, António Topa Coelho, João |
author_role |
author |
author2 |
Araújo, Nuno Miguel Faria Cristelo, N. Miranda, Tiago F. S. Gomes, António Topa Coelho, João |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Silva, Manuela Corrêa Alves Araújo, Nuno Miguel Faria Cristelo, N. Miranda, Tiago F. S. Gomes, António Topa Coelho, João |
dc.subject.por.fl_str_mv |
Soil stabilization Alkaline activation Fly ash Cement binder Lime binder Geomechanical characterization soil stabilisation geomechanical characterisation Engenharia e Tecnologia::Engenharia Civil Science & Technology |
topic |
Soil stabilization Alkaline activation Fly ash Cement binder Lime binder Geomechanical characterization soil stabilisation geomechanical characterisation Engenharia e Tecnologia::Engenharia Civil Science & Technology |
description |
The improvement of geotechnical properties is often achieved by the addition of traditional binders, such as cement or lime. However, the use of such binders implies a considerable financial and environmental cost that needs to be mitigated. An unconventional solution, similar to cement in terms of performance but more environmentally friendly, consists in the use of binders made from alkaline activated industrial residues. The technique consists on the activation of raw materials (such as fly ash or blast furnace slag) rich in Si, Al, or even Ca, with high pH alkaline solutions. The present work was developed aiming the possible stabilisation, using different fly ash contents, of a clayey soil with sand. The activator solution was composed of sodium hydroxide and sodium silicate. The extended experimental campaign included unconfined compressive strength (UCS), California Bearing Ratio (CBR), pulse velocity tests and triaxial tests to assess the geomechanical improvement induced by the new binder. As a mean of comparison, the experimental campaign included also the stabilisation of the same soil with either cement or lime. The obtained data indicates that the use of alkaline activation as a soil stabilisation technique provides competitive geomechanical results, when compared with those obtained with traditional binders. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019 2019-01-01T00:00:00Z |
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 |
http://hdl.handle.net/1822/60909 |
url |
http://hdl.handle.net/1822/60909 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Corrêa-Silva, M., Araújo, N., Cristelo, N., Miranda, T., Gomes, A. T., & Coelho, J. (2018). Improvement of a clayey soil with alkali activated low-calcium fly ash for transport infrastructures applications. Road Materials and Pavement Design, 1-15. 9781138196698 1468-0629 10.1080/14680629.2018.1473286 https://www.tandfonline.com/doi/full/10.1080/14680629.2018.1473286 |
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.publisher.none.fl_str_mv |
Taylor & Francis |
publisher.none.fl_str_mv |
Taylor & Francis |
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 |
repository.mail.fl_str_mv |
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1799133114609434624 |