Physical and chemical assessment of lime–metakaolin mortars: Influence of binder:aggregate ratio

Detalhes bibliográficos
Autor(a) principal: Gameiro, A.
Data de Publicação: 2014
Outros Autores: Santos Silva, A., Faria Rodrigues, P., Grilo, J., Branco, T., Veiga, M. R., Velosa, A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://repositorio.lnec.pt:8080/jspui/handle/123456789/1006046
Resumo: This work evaluates the influence of binder:aggregate ratio on the mineralogical and mechanical properties of air lime–metakaolin mortars. Mineralogical analysis showed that binder:aggregate ratio affects the extent of carbonation and pozzolanic reactions with curing. The pozzolanic reaction occurs mostly at lower curing times (28 days), while, at higher curing ages, carbonation reaction is mostly dominant. The exceptions are mortars with 1:1 (air:- lime) volumetric ratio with 30% and 50% MK in which the pozzolanic reaction is still dominant. The reduction in the mechanical resistance of some compositions observed from 28 to 90 days is related to the calcium aluminate hydrate instability in the presence of free lime. This instability is expected to disappear after the total consumption of free lime, either by pozzolanic or carbonation reaction.
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spelling Physical and chemical assessment of lime–metakaolin mortars: Influence of binder:aggregate ratioAir lime mortarsMetakaolinPozzolanic phasesXrdTg–dtaMechanical testsThis work evaluates the influence of binder:aggregate ratio on the mineralogical and mechanical properties of air lime–metakaolin mortars. Mineralogical analysis showed that binder:aggregate ratio affects the extent of carbonation and pozzolanic reactions with curing. The pozzolanic reaction occurs mostly at lower curing times (28 days), while, at higher curing ages, carbonation reaction is mostly dominant. The exceptions are mortars with 1:1 (air:- lime) volumetric ratio with 30% and 50% MK in which the pozzolanic reaction is still dominant. The reduction in the mechanical resistance of some compositions observed from 28 to 90 days is related to the calcium aluminate hydrate instability in the presence of free lime. This instability is expected to disappear after the total consumption of free lime, either by pozzolanic or carbonation reaction.Elsevier2014-05-02T12:25:06Z2014-10-20T16:31:45Z2017-04-13T11:32:55Z2014-01-01T00:00:00Z2014-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://repositorio.lnec.pt:8080/jspui/handle/123456789/1006046enghttp://dx.doi.org/10.1016/j.cemconcomp.2013.06.010Gameiro, A.Santos Silva, A.Faria Rodrigues, P.Grilo, J.Branco, T.Veiga, M. R.Velosa, A.info: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:RCAAP2024-01-13T03:06:12Zoai:localhost:123456789/1006046Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:39:52.644958Repositório 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 Physical and chemical assessment of lime–metakaolin mortars: Influence of binder:aggregate ratio
title Physical and chemical assessment of lime–metakaolin mortars: Influence of binder:aggregate ratio
spellingShingle Physical and chemical assessment of lime–metakaolin mortars: Influence of binder:aggregate ratio
Gameiro, A.
Air lime mortars
Metakaolin
Pozzolanic phases
Xrd
Tg–dta
Mechanical tests
title_short Physical and chemical assessment of lime–metakaolin mortars: Influence of binder:aggregate ratio
title_full Physical and chemical assessment of lime–metakaolin mortars: Influence of binder:aggregate ratio
title_fullStr Physical and chemical assessment of lime–metakaolin mortars: Influence of binder:aggregate ratio
title_full_unstemmed Physical and chemical assessment of lime–metakaolin mortars: Influence of binder:aggregate ratio
title_sort Physical and chemical assessment of lime–metakaolin mortars: Influence of binder:aggregate ratio
author Gameiro, A.
author_facet Gameiro, A.
Santos Silva, A.
Faria Rodrigues, P.
Grilo, J.
Branco, T.
Veiga, M. R.
Velosa, A.
author_role author
author2 Santos Silva, A.
Faria Rodrigues, P.
Grilo, J.
Branco, T.
Veiga, M. R.
Velosa, A.
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Gameiro, A.
Santos Silva, A.
Faria Rodrigues, P.
Grilo, J.
Branco, T.
Veiga, M. R.
Velosa, A.
dc.subject.por.fl_str_mv Air lime mortars
Metakaolin
Pozzolanic phases
Xrd
Tg–dta
Mechanical tests
topic Air lime mortars
Metakaolin
Pozzolanic phases
Xrd
Tg–dta
Mechanical tests
description This work evaluates the influence of binder:aggregate ratio on the mineralogical and mechanical properties of air lime–metakaolin mortars. Mineralogical analysis showed that binder:aggregate ratio affects the extent of carbonation and pozzolanic reactions with curing. The pozzolanic reaction occurs mostly at lower curing times (28 days), while, at higher curing ages, carbonation reaction is mostly dominant. The exceptions are mortars with 1:1 (air:- lime) volumetric ratio with 30% and 50% MK in which the pozzolanic reaction is still dominant. The reduction in the mechanical resistance of some compositions observed from 28 to 90 days is related to the calcium aluminate hydrate instability in the presence of free lime. This instability is expected to disappear after the total consumption of free lime, either by pozzolanic or carbonation reaction.
publishDate 2014
dc.date.none.fl_str_mv 2014-05-02T12:25:06Z
2014-10-20T16:31:45Z
2014-01-01T00:00:00Z
2014-01
2017-04-13T11:32:55Z
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://repositorio.lnec.pt:8080/jspui/handle/123456789/1006046
url http://repositorio.lnec.pt:8080/jspui/handle/123456789/1006046
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.cemconcomp.2013.06.010
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 Elsevier
publisher.none.fl_str_mv Elsevier
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
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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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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