Investigations about the effect of aggregates on strength and microstructure of geopolymeric mine waste mud binders

Detalhes bibliográficos
Autor(a) principal: Pacheco-Torgal, F.
Data de Publicação: 2007
Outros Autores: Gomes, J. P. Castro, Jalali, Said
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/7558
Resumo: Geopolymeric binders appear to be an alternative to traditional Portland cement, due to high mechanical performances and environmental advantages. Some aspects related to the effect of aggregates in the microstructure and mechanical behaviour of geopolymeric mine waste mud (GMWM) binders are reported in the present study. Compressive and tensile strength of mine waste mud binders were analyzed. The factors investigated were the aggregate/binder ratio, the aggregate dimension and aggregate type, schist, granite and limestone. Test results showed that GMWM binders have a very high strength at early ages and also possess a very high tensile strength. It's suggested that behaviour may be due to the dissolution of quartz and alumina in the presence of alkalis enhancing bonding between paste and aggregates. The aggregate dimension showed only significant effect on tensile strength. Limestone aggregates showed a chemical bond to the alkaliactivated paste but presented higher shrinkage. It was also found that no traditional porous ITZ was detected in GMWM binders.
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spelling Investigations about the effect of aggregates on strength and microstructure of geopolymeric mine waste mud bindersGeopolymericBinderCompressive strengthTensile strengthMicrostructureScience & TechnologyGeopolymeric binders appear to be an alternative to traditional Portland cement, due to high mechanical performances and environmental advantages. Some aspects related to the effect of aggregates in the microstructure and mechanical behaviour of geopolymeric mine waste mud (GMWM) binders are reported in the present study. Compressive and tensile strength of mine waste mud binders were analyzed. The factors investigated were the aggregate/binder ratio, the aggregate dimension and aggregate type, schist, granite and limestone. Test results showed that GMWM binders have a very high strength at early ages and also possess a very high tensile strength. It's suggested that behaviour may be due to the dissolution of quartz and alumina in the presence of alkalis enhancing bonding between paste and aggregates. The aggregate dimension showed only significant effect on tensile strength. Limestone aggregates showed a chemical bond to the alkaliactivated paste but presented higher shrinkage. It was also found that no traditional porous ITZ was detected in GMWM binders.Pergamon PressUniversidade do MinhoPacheco-Torgal, F.Gomes, J. P. CastroJalali, Said2007-062007-06-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/7558eng"Cement and Concrete Research". ISSN 0008-8846. 37:6 (June 2007) 933-941.0008-884610.1016/j.cemconres.2007.02.006info: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:RCAAP2023-07-21T12:27:10Zoai:repositorium.sdum.uminho.pt:1822/7558Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:21:42.349638Repositório 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 Investigations about the effect of aggregates on strength and microstructure of geopolymeric mine waste mud binders
title Investigations about the effect of aggregates on strength and microstructure of geopolymeric mine waste mud binders
spellingShingle Investigations about the effect of aggregates on strength and microstructure of geopolymeric mine waste mud binders
Pacheco-Torgal, F.
Geopolymeric
Binder
Compressive strength
Tensile strength
Microstructure
Science & Technology
title_short Investigations about the effect of aggregates on strength and microstructure of geopolymeric mine waste mud binders
title_full Investigations about the effect of aggregates on strength and microstructure of geopolymeric mine waste mud binders
title_fullStr Investigations about the effect of aggregates on strength and microstructure of geopolymeric mine waste mud binders
title_full_unstemmed Investigations about the effect of aggregates on strength and microstructure of geopolymeric mine waste mud binders
title_sort Investigations about the effect of aggregates on strength and microstructure of geopolymeric mine waste mud binders
author Pacheco-Torgal, F.
author_facet Pacheco-Torgal, F.
Gomes, J. P. Castro
Jalali, Said
author_role author
author2 Gomes, J. P. Castro
Jalali, Said
author2_role author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Pacheco-Torgal, F.
Gomes, J. P. Castro
Jalali, Said
dc.subject.por.fl_str_mv Geopolymeric
Binder
Compressive strength
Tensile strength
Microstructure
Science & Technology
topic Geopolymeric
Binder
Compressive strength
Tensile strength
Microstructure
Science & Technology
description Geopolymeric binders appear to be an alternative to traditional Portland cement, due to high mechanical performances and environmental advantages. Some aspects related to the effect of aggregates in the microstructure and mechanical behaviour of geopolymeric mine waste mud (GMWM) binders are reported in the present study. Compressive and tensile strength of mine waste mud binders were analyzed. The factors investigated were the aggregate/binder ratio, the aggregate dimension and aggregate type, schist, granite and limestone. Test results showed that GMWM binders have a very high strength at early ages and also possess a very high tensile strength. It's suggested that behaviour may be due to the dissolution of quartz and alumina in the presence of alkalis enhancing bonding between paste and aggregates. The aggregate dimension showed only significant effect on tensile strength. Limestone aggregates showed a chemical bond to the alkaliactivated paste but presented higher shrinkage. It was also found that no traditional porous ITZ was detected in GMWM binders.
publishDate 2007
dc.date.none.fl_str_mv 2007-06
2007-06-01T00:00:00Z
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/1822/7558
url http://hdl.handle.net/1822/7558
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv "Cement and Concrete Research". ISSN 0008-8846. 37:6 (June 2007) 933-941.
0008-8846
10.1016/j.cemconres.2007.02.006
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 Pergamon Press
publisher.none.fl_str_mv Pergamon Press
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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