Alkali-activated binary mortar based on natural volcanic pozzolan for repair applications

Detalhes bibliográficos
Autor(a) principal: Robayo-Salazar, Rafael
Data de Publicação: 2019
Outros Autores: Jesús, Carlos, Mejía de Gutierrez, Ruby, Pacheco-Torgal, F.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://hdl.handle.net/1822/60386
Resumo: The goal of this investigation was evaluate the potential of an alkali-activated binary mortar (AABM), based on a natural volcanic pozzolan (70%) and granulated blast furnace slag (30%), as a repair material. This evaluation focused on its physico-mechanical characterisation (compressive, flexural and splitting tensile strengths; modulus of elasticity; capillary water absorption; and shrinkage) and the measurement of its adherence to three class of OPC concretes (substrates) using pull-off tests. A mixture of NaOH and Na2SiO3 was used as alkaline activator. The compressive and splitting tensile strength of AABM were 34.8?MPa and 2.13?MPa?at 28 days of curing, respectively. Its capillary absorption coefficient and modulus of elasticity were 0.5088?kg/m2h0.5 and 8.66?GPa respectively. The results of the pull-off test demonstrate the adherent nature of the AABM, which was promoted by the strength (quality) of the OPC substrate, with pull-off adherences of 0.75?MPa, 1.14?MPa and 1.24?MPa for class C25/30, C35/45 and C50/60, respectively. According to the results obtained and standard specifications (EN 1504-3), this material can be classified as a class R2-repair mortar.
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spelling Alkali-activated binary mortar based on natural volcanic pozzolan for repair applicationsAlkali-activated materialsCoating mortarNatural volcanic pozzolanPull-offRepair mortarScience & TechnologyThe goal of this investigation was evaluate the potential of an alkali-activated binary mortar (AABM), based on a natural volcanic pozzolan (70%) and granulated blast furnace slag (30%), as a repair material. This evaluation focused on its physico-mechanical characterisation (compressive, flexural and splitting tensile strengths; modulus of elasticity; capillary water absorption; and shrinkage) and the measurement of its adherence to three class of OPC concretes (substrates) using pull-off tests. A mixture of NaOH and Na2SiO3 was used as alkaline activator. The compressive and splitting tensile strength of AABM were 34.8?MPa and 2.13?MPa?at 28 days of curing, respectively. Its capillary absorption coefficient and modulus of elasticity were 0.5088?kg/m2h0.5 and 8.66?GPa respectively. The results of the pull-off test demonstrate the adherent nature of the AABM, which was promoted by the strength (quality) of the OPC substrate, with pull-off adherences of 0.75?MPa, 1.14?MPa and 1.24?MPa for class C25/30, C35/45 and C50/60, respectively. According to the results obtained and standard specifications (EN 1504-3), this material can be classified as a class R2-repair mortar.COLCIENCIAS -Departamento Administrativo de Ciencia, Tecnología e Innovación(undefined)info:eu-repo/semantics/publishedVersionElsevierUniversidade do MinhoRobayo-Salazar, RafaelJesús, CarlosMejía de Gutierrez, RubyPacheco-Torgal, F.20192019-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/60386engRobayo-Salazar R., Jesus C., de Gutierrez R., Pacheco-Torgal F. Alkali-activated binary mortar based on natural volcanic pozzolan for repair applications, Journal of Building Engineering, Vol. 25, Issue 1, pp. 1-17, doi:10.1016/j.jobe.2019.100785, 20192352-710210.1016/j.jobe.2019.100785https://www.sciencedirect.com/science/article/pii/S2352710218309410info: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:RCAAP2023-07-21T12:33:24Zoai:repositorium.sdum.uminho.pt:1822/60386Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:28:54.811513Repositório 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 Alkali-activated binary mortar based on natural volcanic pozzolan for repair applications
title Alkali-activated binary mortar based on natural volcanic pozzolan for repair applications
spellingShingle Alkali-activated binary mortar based on natural volcanic pozzolan for repair applications
Robayo-Salazar, Rafael
Alkali-activated materials
Coating mortar
Natural volcanic pozzolan
Pull-off
Repair mortar
Science & Technology
title_short Alkali-activated binary mortar based on natural volcanic pozzolan for repair applications
title_full Alkali-activated binary mortar based on natural volcanic pozzolan for repair applications
title_fullStr Alkali-activated binary mortar based on natural volcanic pozzolan for repair applications
title_full_unstemmed Alkali-activated binary mortar based on natural volcanic pozzolan for repair applications
title_sort Alkali-activated binary mortar based on natural volcanic pozzolan for repair applications
author Robayo-Salazar, Rafael
author_facet Robayo-Salazar, Rafael
Jesús, Carlos
Mejía de Gutierrez, Ruby
Pacheco-Torgal, F.
author_role author
author2 Jesús, Carlos
Mejía de Gutierrez, Ruby
Pacheco-Torgal, F.
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Robayo-Salazar, Rafael
Jesús, Carlos
Mejía de Gutierrez, Ruby
Pacheco-Torgal, F.
dc.subject.por.fl_str_mv Alkali-activated materials
Coating mortar
Natural volcanic pozzolan
Pull-off
Repair mortar
Science & Technology
topic Alkali-activated materials
Coating mortar
Natural volcanic pozzolan
Pull-off
Repair mortar
Science & Technology
description The goal of this investigation was evaluate the potential of an alkali-activated binary mortar (AABM), based on a natural volcanic pozzolan (70%) and granulated blast furnace slag (30%), as a repair material. This evaluation focused on its physico-mechanical characterisation (compressive, flexural and splitting tensile strengths; modulus of elasticity; capillary water absorption; and shrinkage) and the measurement of its adherence to three class of OPC concretes (substrates) using pull-off tests. A mixture of NaOH and Na2SiO3 was used as alkaline activator. The compressive and splitting tensile strength of AABM were 34.8?MPa and 2.13?MPa?at 28 days of curing, respectively. Its capillary absorption coefficient and modulus of elasticity were 0.5088?kg/m2h0.5 and 8.66?GPa respectively. The results of the pull-off test demonstrate the adherent nature of the AABM, which was promoted by the strength (quality) of the OPC substrate, with pull-off adherences of 0.75?MPa, 1.14?MPa and 1.24?MPa for class C25/30, C35/45 and C50/60, respectively. According to the results obtained and standard specifications (EN 1504-3), this material can be classified as a class R2-repair mortar.
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 https://hdl.handle.net/1822/60386
url https://hdl.handle.net/1822/60386
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Robayo-Salazar R., Jesus C., de Gutierrez R., Pacheco-Torgal F. Alkali-activated binary mortar based on natural volcanic pozzolan for repair applications, Journal of Building Engineering, Vol. 25, Issue 1, pp. 1-17, doi:10.1016/j.jobe.2019.100785, 2019
2352-7102
10.1016/j.jobe.2019.100785
https://www.sciencedirect.com/science/article/pii/S2352710218309410
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
repository.mail.fl_str_mv
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