Composition, strength and workability of alkali-activated metakaolin based mortars

Detalhes bibliográficos
Autor(a) principal: Pacheco-Torgal, F.
Data de Publicação: 2011
Outros Autores: Moura, D., Ding, Yining, 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/1822/12782
Resumo: This study has investigated the joint effect of several factors on the workability and mechanical strength of alkali-activated metakaolin based mortars. The factors analysed through a laboratory experiment of 432 specimens, pertaining to 48 different mortar mixes were, sodium hydroxide concentration (10 M,12 M, 14 M, 16 M), the superplasticizer content (1%, 2%, 3%) and the percentage substitution of metakaolin by calcium hydroxide in the mixture (5%, 10%). The results show that the workability decreases with the concentration of sodium hydroxide and increases with the amount of calcium hydroxide and superplasticizer. The results also show that the use of 3% of superplasticizer, combined with a calcium hydroxide content of 10%, allows improving the mortar flow from less than 50% to over 90%, while maintaining a high compressive and flexural strength.
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spelling Composition, strength and workability of alkali-activated metakaolin based mortarsAlkali-activated mortarsMetakaolinWorkabilityMechanical strengthScience & TechnologyThis study has investigated the joint effect of several factors on the workability and mechanical strength of alkali-activated metakaolin based mortars. The factors analysed through a laboratory experiment of 432 specimens, pertaining to 48 different mortar mixes were, sodium hydroxide concentration (10 M,12 M, 14 M, 16 M), the superplasticizer content (1%, 2%, 3%) and the percentage substitution of metakaolin by calcium hydroxide in the mixture (5%, 10%). The results show that the workability decreases with the concentration of sodium hydroxide and increases with the amount of calcium hydroxide and superplasticizer. The results also show that the use of 3% of superplasticizer, combined with a calcium hydroxide content of 10%, allows improving the mortar flow from less than 50% to over 90%, while maintaining a high compressive and flexural strength.ElsevierUniversidade do MinhoPacheco-Torgal, F.Moura, D.Ding, YiningJalali, Said2011-05-102011-05-10T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/12782eng"Construction and Building Materials". ISSN 0950-0618. 25 (2011) 3732-37450950-061810.1016/j.conbuildmat.2011.04.017info: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:RCAAP2023-07-21T12:13:12Zoai:repositorium.sdum.uminho.pt:1822/12782Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:05:14.915647Repositório 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 Composition, strength and workability of alkali-activated metakaolin based mortars
title Composition, strength and workability of alkali-activated metakaolin based mortars
spellingShingle Composition, strength and workability of alkali-activated metakaolin based mortars
Pacheco-Torgal, F.
Alkali-activated mortars
Metakaolin
Workability
Mechanical strength
Science & Technology
title_short Composition, strength and workability of alkali-activated metakaolin based mortars
title_full Composition, strength and workability of alkali-activated metakaolin based mortars
title_fullStr Composition, strength and workability of alkali-activated metakaolin based mortars
title_full_unstemmed Composition, strength and workability of alkali-activated metakaolin based mortars
title_sort Composition, strength and workability of alkali-activated metakaolin based mortars
author Pacheco-Torgal, F.
author_facet Pacheco-Torgal, F.
Moura, D.
Ding, Yining
Jalali, Said
author_role author
author2 Moura, D.
Ding, Yining
Jalali, Said
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Pacheco-Torgal, F.
Moura, D.
Ding, Yining
Jalali, Said
dc.subject.por.fl_str_mv Alkali-activated mortars
Metakaolin
Workability
Mechanical strength
Science & Technology
topic Alkali-activated mortars
Metakaolin
Workability
Mechanical strength
Science & Technology
description This study has investigated the joint effect of several factors on the workability and mechanical strength of alkali-activated metakaolin based mortars. The factors analysed through a laboratory experiment of 432 specimens, pertaining to 48 different mortar mixes were, sodium hydroxide concentration (10 M,12 M, 14 M, 16 M), the superplasticizer content (1%, 2%, 3%) and the percentage substitution of metakaolin by calcium hydroxide in the mixture (5%, 10%). The results show that the workability decreases with the concentration of sodium hydroxide and increases with the amount of calcium hydroxide and superplasticizer. The results also show that the use of 3% of superplasticizer, combined with a calcium hydroxide content of 10%, allows improving the mortar flow from less than 50% to over 90%, while maintaining a high compressive and flexural strength.
publishDate 2011
dc.date.none.fl_str_mv 2011-05-10
2011-05-10T00:00:00Z
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/1822/12782
url http://hdl.handle.net/1822/12782
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv "Construction and Building Materials". ISSN 0950-0618. 25 (2011) 3732-3745
0950-0618
10.1016/j.conbuildmat.2011.04.017
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
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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