Experimental study of the mechanical properties and durability of self-compacting mortars with nano materials (SiO2 and TiO2)

Detalhes bibliográficos
Autor(a) principal: Rao, S.
Data de Publicação: 2015
Outros Autores: Raposeiro Da Silva, Pedro, De Brito, Jorge
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.21/5702
Resumo: Resumo: Cement, as well as the remaining constituents of self-compacting mortars, must be carefully selected, in order to obtain an adequate composition with a granular mix as compact as possible and a good performance in the fresh state (self-compacting effect) and the hardened state (mechanical and durability-related behavior). Therefore in this work the possibility of incorporating nano particles in self-compacting mortars was studied. Nano materials are very reactive due mostly to their high specific surface and show a great potential to improve the properties of these mortars, both in mechanical and durability terms. In this work two nano materials were used, nano silica (nano SiO2) in colloidal state and nano titanium (nano TiO2) in amorphous state, in two types of self-compacting mortars (ratio binder:sand of 1:1 and 1:2). The self-compacting mortar mixes have the same water/cement ratio and 30% of replacement of cement with fly ashes. The influence of nano materials nano-SiO2 and nano-TiO2 on the fresh and hardened state properties of these self-compacting mortars was studied. The results show that the use of nano materials in repair and rehabilitation mortars has significant potential but still needs to be optimized. (C) 2015 Elsevier Ltd. All rights reserved.
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spelling Experimental study of the mechanical properties and durability of self-compacting mortars with nano materials (SiO2 and TiO2)Self-compacting mortarFly ashNano titaniumNano silicaFresh propertiesMechanical propertiesDurabilityResumo: Cement, as well as the remaining constituents of self-compacting mortars, must be carefully selected, in order to obtain an adequate composition with a granular mix as compact as possible and a good performance in the fresh state (self-compacting effect) and the hardened state (mechanical and durability-related behavior). Therefore in this work the possibility of incorporating nano particles in self-compacting mortars was studied. Nano materials are very reactive due mostly to their high specific surface and show a great potential to improve the properties of these mortars, both in mechanical and durability terms. In this work two nano materials were used, nano silica (nano SiO2) in colloidal state and nano titanium (nano TiO2) in amorphous state, in two types of self-compacting mortars (ratio binder:sand of 1:1 and 1:2). The self-compacting mortar mixes have the same water/cement ratio and 30% of replacement of cement with fly ashes. The influence of nano materials nano-SiO2 and nano-TiO2 on the fresh and hardened state properties of these self-compacting mortars was studied. The results show that the use of nano materials in repair and rehabilitation mortars has significant potential but still needs to be optimized. (C) 2015 Elsevier Ltd. All rights reserved.Elsevier Science LTDRCIPLRao, S.Raposeiro Da Silva, PedroDe Brito, Jorge2016-02-23T12:15:55Z2015-10-152015-10-15T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.21/5702engRAO, S; SILVA, Pedro Raposeiro da; BRITO, Jorge de - Experimental study of the mechanical properties and durability of self-compacting mortars with nano materials (SiO2 and TiO2). Construction and Building Materials. ISSN. 0950-0618 Vol. 96 (2015), pp. 508-5170950-061810.1016/j.conbuildmat.2015.08.049metadata only accessinfo: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:RCAAP2023-08-03T09:49:30Zoai:repositorio.ipl.pt:10400.21/5702Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:14:57.046471Repositório 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 Experimental study of the mechanical properties and durability of self-compacting mortars with nano materials (SiO2 and TiO2)
title Experimental study of the mechanical properties and durability of self-compacting mortars with nano materials (SiO2 and TiO2)
spellingShingle Experimental study of the mechanical properties and durability of self-compacting mortars with nano materials (SiO2 and TiO2)
Rao, S.
Self-compacting mortar
Fly ash
Nano titanium
Nano silica
Fresh properties
Mechanical properties
Durability
title_short Experimental study of the mechanical properties and durability of self-compacting mortars with nano materials (SiO2 and TiO2)
title_full Experimental study of the mechanical properties and durability of self-compacting mortars with nano materials (SiO2 and TiO2)
title_fullStr Experimental study of the mechanical properties and durability of self-compacting mortars with nano materials (SiO2 and TiO2)
title_full_unstemmed Experimental study of the mechanical properties and durability of self-compacting mortars with nano materials (SiO2 and TiO2)
title_sort Experimental study of the mechanical properties and durability of self-compacting mortars with nano materials (SiO2 and TiO2)
author Rao, S.
author_facet Rao, S.
Raposeiro Da Silva, Pedro
De Brito, Jorge
author_role author
author2 Raposeiro Da Silva, Pedro
De Brito, Jorge
author2_role author
author
dc.contributor.none.fl_str_mv RCIPL
dc.contributor.author.fl_str_mv Rao, S.
Raposeiro Da Silva, Pedro
De Brito, Jorge
dc.subject.por.fl_str_mv Self-compacting mortar
Fly ash
Nano titanium
Nano silica
Fresh properties
Mechanical properties
Durability
topic Self-compacting mortar
Fly ash
Nano titanium
Nano silica
Fresh properties
Mechanical properties
Durability
description Resumo: Cement, as well as the remaining constituents of self-compacting mortars, must be carefully selected, in order to obtain an adequate composition with a granular mix as compact as possible and a good performance in the fresh state (self-compacting effect) and the hardened state (mechanical and durability-related behavior). Therefore in this work the possibility of incorporating nano particles in self-compacting mortars was studied. Nano materials are very reactive due mostly to their high specific surface and show a great potential to improve the properties of these mortars, both in mechanical and durability terms. In this work two nano materials were used, nano silica (nano SiO2) in colloidal state and nano titanium (nano TiO2) in amorphous state, in two types of self-compacting mortars (ratio binder:sand of 1:1 and 1:2). The self-compacting mortar mixes have the same water/cement ratio and 30% of replacement of cement with fly ashes. The influence of nano materials nano-SiO2 and nano-TiO2 on the fresh and hardened state properties of these self-compacting mortars was studied. The results show that the use of nano materials in repair and rehabilitation mortars has significant potential but still needs to be optimized. (C) 2015 Elsevier Ltd. All rights reserved.
publishDate 2015
dc.date.none.fl_str_mv 2015-10-15
2015-10-15T00:00:00Z
2016-02-23T12:15:55Z
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://hdl.handle.net/10400.21/5702
url http://hdl.handle.net/10400.21/5702
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv RAO, S; SILVA, Pedro Raposeiro da; BRITO, Jorge de - Experimental study of the mechanical properties and durability of self-compacting mortars with nano materials (SiO2 and TiO2). Construction and Building Materials. ISSN. 0950-0618 Vol. 96 (2015), pp. 508-517
0950-0618
10.1016/j.conbuildmat.2015.08.049
dc.rights.driver.fl_str_mv metadata only access
info:eu-repo/semantics/openAccess
rights_invalid_str_mv metadata only access
eu_rights_str_mv openAccess
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dc.publisher.none.fl_str_mv Elsevier Science LTD
publisher.none.fl_str_mv Elsevier Science LTD
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
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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)
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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