Performance of a fly ash geopolymeric based binder with calcium hydroxide, Portland cement and metakaolin as additives

Detalhes bibliográficos
Autor(a) principal: Kheradmand, Mohammad
Data de Publicação: 2018
Outros Autores: Abdollahnejad, Zahra, 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/1822/56086
Resumo: Geopolymeric binders are especially indicated when reusing a wide diversity of wastes. This is an important feature, especially in the European context,  in which a circular economy and future zero waste is targeted. Still, the cost of these materials, due to the use of high purity activators, prevents their commercialization as they are simply not competitive enough. The reduction of the amount of activators could be a cost-efficient solution if the associated decrease of the mechanical properties turned not to be excessive. This means that it is important to investigate the manner in which these additives can be used on their composition in order to compensate that mechanical reduction. This paper discloses results concerning the mix design of fly ash based geopolymeric mixtures using metakaolin, Portland cement (OPC) and calcium hydroxide as additives. Their influence on the mechanical properties, microstructure and cost-efficiency was studied. The results showed that the use of  Portland cement as an additive leads to lower compressive strength.  Results also show that geopolymers with different additives have different optimum Na2SiO3/NaOH ratios.
id RCAP_fe4fc0c107f44620bf5dd2f2b0dab981
oai_identifier_str oai:repositorium.sdum.uminho.pt:1822/56086
network_acronym_str RCAP
network_name_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository_id_str 7160
spelling Performance of a fly ash geopolymeric based binder with calcium hydroxide, Portland cement and metakaolin as additivesCompressive strengthcost analysisFly ashGeopolymerMicrostructureMix designWaste reuseEngenharia e Tecnologia::Engenharia CivilGeopolymeric binders are especially indicated when reusing a wide diversity of wastes. This is an important feature, especially in the European context,  in which a circular economy and future zero waste is targeted. Still, the cost of these materials, due to the use of high purity activators, prevents their commercialization as they are simply not competitive enough. The reduction of the amount of activators could be a cost-efficient solution if the associated decrease of the mechanical properties turned not to be excessive. This means that it is important to investigate the manner in which these additives can be used on their composition in order to compensate that mechanical reduction. This paper discloses results concerning the mix design of fly ash based geopolymeric mixtures using metakaolin, Portland cement (OPC) and calcium hydroxide as additives. Their influence on the mechanical properties, microstructure and cost-efficiency was studied. The results showed that the use of  Portland cement as an additive leads to lower compressive strength.  Results also show that geopolymers with different additives have different optimum Na2SiO3/NaOH ratios.Funding: This study was funded by Foundation for Science and Technology (FCT) in the frame of project IF/00706/2014-UM.2.15.info:eu-repo/semantics/publishedVersionBentham Science PublishersUniversidade do MinhoKheradmand, MohammadAbdollahnejad, ZahraPacheco-Torgal, F.2018-062018-06-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/56086engKheradmand M., Abdollahnejad Z., Pacheco-Torgal F. Performance of a Fly Ash Geopolymeric Based Binder with Calcium Hydroxide, Portland Cement and Metakaolin as Additives, The Open Civil Engineering Journal, Vol. 12, pp. 1-20, doi: 10.2174/1874149501812010167, 2018.10.2174/1874149501812010167info: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:RCAAP2023-07-21T12:41:12Zoai:repositorium.sdum.uminho.pt:1822/56086Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:38:07.654107Repositório 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 Performance of a fly ash geopolymeric based binder with calcium hydroxide, Portland cement and metakaolin as additives
title Performance of a fly ash geopolymeric based binder with calcium hydroxide, Portland cement and metakaolin as additives
spellingShingle Performance of a fly ash geopolymeric based binder with calcium hydroxide, Portland cement and metakaolin as additives
Kheradmand, Mohammad
Compressive strength
cost analysis
Fly ash
Geopolymer
Microstructure
Mix design
Waste reuse
Engenharia e Tecnologia::Engenharia Civil
title_short Performance of a fly ash geopolymeric based binder with calcium hydroxide, Portland cement and metakaolin as additives
title_full Performance of a fly ash geopolymeric based binder with calcium hydroxide, Portland cement and metakaolin as additives
title_fullStr Performance of a fly ash geopolymeric based binder with calcium hydroxide, Portland cement and metakaolin as additives
title_full_unstemmed Performance of a fly ash geopolymeric based binder with calcium hydroxide, Portland cement and metakaolin as additives
title_sort Performance of a fly ash geopolymeric based binder with calcium hydroxide, Portland cement and metakaolin as additives
author Kheradmand, Mohammad
author_facet Kheradmand, Mohammad
Abdollahnejad, Zahra
Pacheco-Torgal, F.
author_role author
author2 Abdollahnejad, Zahra
Pacheco-Torgal, F.
author2_role author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Kheradmand, Mohammad
Abdollahnejad, Zahra
Pacheco-Torgal, F.
dc.subject.por.fl_str_mv Compressive strength
cost analysis
Fly ash
Geopolymer
Microstructure
Mix design
Waste reuse
Engenharia e Tecnologia::Engenharia Civil
topic Compressive strength
cost analysis
Fly ash
Geopolymer
Microstructure
Mix design
Waste reuse
Engenharia e Tecnologia::Engenharia Civil
description Geopolymeric binders are especially indicated when reusing a wide diversity of wastes. This is an important feature, especially in the European context,  in which a circular economy and future zero waste is targeted. Still, the cost of these materials, due to the use of high purity activators, prevents their commercialization as they are simply not competitive enough. The reduction of the amount of activators could be a cost-efficient solution if the associated decrease of the mechanical properties turned not to be excessive. This means that it is important to investigate the manner in which these additives can be used on their composition in order to compensate that mechanical reduction. This paper discloses results concerning the mix design of fly ash based geopolymeric mixtures using metakaolin, Portland cement (OPC) and calcium hydroxide as additives. Their influence on the mechanical properties, microstructure and cost-efficiency was studied. The results showed that the use of  Portland cement as an additive leads to lower compressive strength.  Results also show that geopolymers with different additives have different optimum Na2SiO3/NaOH ratios.
publishDate 2018
dc.date.none.fl_str_mv 2018-06
2018-06-01T00:00:00Z
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 https://hdl.handle.net/1822/56086
url https://hdl.handle.net/1822/56086
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Kheradmand M., Abdollahnejad Z., Pacheco-Torgal F. Performance of a Fly Ash Geopolymeric Based Binder with Calcium Hydroxide, Portland Cement and Metakaolin as Additives, The Open Civil Engineering Journal, Vol. 12, pp. 1-20, doi: 10.2174/1874149501812010167, 2018.
10.2174/1874149501812010167
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 Bentham Science Publishers
publisher.none.fl_str_mv Bentham Science Publishers
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
_version_ 1799132917231779840