Compressive strength, microstructure and hydration products of hybrid alkaline cements
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/30178 |
Resumo: | Ordinary Portland cement (OPC) is the dominant binder in the construction industry with a global production that currently reaches a total of 3 Gt per year. As a consequence, the cement industry’s contribution to the total worldwide CO2 emissions is of about 7% of the total emissions. Publications on the field of alkali-activated binders (also termed geopolymers), state that this new material is, potentially, likely to become an alternative to Portland cement. However, recent LCA studies show that the environmental performance of alkali-activated binders depends, to great extent, of their composition. Also, researchers report that these binders can be produced in a more eco-efficient manner if the use of sodium silicate is avoided. This is due to the fact that the referred component is associated to a high carbon footprint. Besides, most alkali-activated cements suffer from severe efflorescence, a reaction originated by the fact that the alkaline and/or soluble silicates that are added during processing cannot be totally consumed. This paper presents experimental results on hybrid alkaline cements. The compressive strength results and the efflorescence observations show that some of the new mixes already exhibit a promising performance. |
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Compressive strength, microstructure and hydration products of hybrid alkaline cementsHybrid alkaline cementsCompressive strengthEfflorescencesMicrostructureScience & TechnologyOrdinary Portland cement (OPC) is the dominant binder in the construction industry with a global production that currently reaches a total of 3 Gt per year. As a consequence, the cement industry’s contribution to the total worldwide CO2 emissions is of about 7% of the total emissions. Publications on the field of alkali-activated binders (also termed geopolymers), state that this new material is, potentially, likely to become an alternative to Portland cement. However, recent LCA studies show that the environmental performance of alkali-activated binders depends, to great extent, of their composition. Also, researchers report that these binders can be produced in a more eco-efficient manner if the use of sodium silicate is avoided. This is due to the fact that the referred component is associated to a high carbon footprint. Besides, most alkali-activated cements suffer from severe efflorescence, a reaction originated by the fact that the alkaline and/or soluble silicates that are added during processing cannot be totally consumed. This paper presents experimental results on hybrid alkaline cements. The compressive strength results and the efflorescence observations show that some of the new mixes already exhibit a promising performance.Universidade Federal São Carlos. Departamento Engenharia MaterialsUniversidade do MinhoAbdollahnejad, ZahraHlavacek, PetrMiraldo, SégioPacheco-Torgal, F.Aguiar, J. L. Barroso de20142014-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/30178engAbdollahnejad Z., Hlavacek H., Miraldo S., Torgal F. P., Aguiar J. Compressive Strength, Microstructure and Hydration Products of Hybrid Alkaline Cements, Materials Research, doi:10.1590/S1516-14392014005000091, 20141516-143910.1590/S1516-14392014005000091http://www.scielo.br/scielo.php?script=sci_pdf&pid=S1516-14392014005000091&lng=en&nrm=iso&tlng=eninfo: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:RCAAP2023-07-21T11:57:51Zoai:repositorium.sdum.uminho.pt:1822/30178Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:47:32.664010Repositório 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 |
Compressive strength, microstructure and hydration products of hybrid alkaline cements |
title |
Compressive strength, microstructure and hydration products of hybrid alkaline cements |
spellingShingle |
Compressive strength, microstructure and hydration products of hybrid alkaline cements Abdollahnejad, Zahra Hybrid alkaline cements Compressive strength Efflorescences Microstructure Science & Technology |
title_short |
Compressive strength, microstructure and hydration products of hybrid alkaline cements |
title_full |
Compressive strength, microstructure and hydration products of hybrid alkaline cements |
title_fullStr |
Compressive strength, microstructure and hydration products of hybrid alkaline cements |
title_full_unstemmed |
Compressive strength, microstructure and hydration products of hybrid alkaline cements |
title_sort |
Compressive strength, microstructure and hydration products of hybrid alkaline cements |
author |
Abdollahnejad, Zahra |
author_facet |
Abdollahnejad, Zahra Hlavacek, Petr Miraldo, Ségio Pacheco-Torgal, F. Aguiar, J. L. Barroso de |
author_role |
author |
author2 |
Hlavacek, Petr Miraldo, Ségio Pacheco-Torgal, F. Aguiar, J. L. Barroso de |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Abdollahnejad, Zahra Hlavacek, Petr Miraldo, Ségio Pacheco-Torgal, F. Aguiar, J. L. Barroso de |
dc.subject.por.fl_str_mv |
Hybrid alkaline cements Compressive strength Efflorescences Microstructure Science & Technology |
topic |
Hybrid alkaline cements Compressive strength Efflorescences Microstructure Science & Technology |
description |
Ordinary Portland cement (OPC) is the dominant binder in the construction industry with a global production that currently reaches a total of 3 Gt per year. As a consequence, the cement industry’s contribution to the total worldwide CO2 emissions is of about 7% of the total emissions. Publications on the field of alkali-activated binders (also termed geopolymers), state that this new material is, potentially, likely to become an alternative to Portland cement. However, recent LCA studies show that the environmental performance of alkali-activated binders depends, to great extent, of their composition. Also, researchers report that these binders can be produced in a more eco-efficient manner if the use of sodium silicate is avoided. This is due to the fact that the referred component is associated to a high carbon footprint. Besides, most alkali-activated cements suffer from severe efflorescence, a reaction originated by the fact that the alkaline and/or soluble silicates that are added during processing cannot be totally consumed. This paper presents experimental results on hybrid alkaline cements. The compressive strength results and the efflorescence observations show that some of the new mixes already exhibit a promising performance. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014 2014-01-01T00:00:00Z |
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 |
http://hdl.handle.net/1822/30178 |
url |
http://hdl.handle.net/1822/30178 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Abdollahnejad Z., Hlavacek H., Miraldo S., Torgal F. P., Aguiar J. Compressive Strength, Microstructure and Hydration Products of Hybrid Alkaline Cements, Materials Research, doi:10.1590/S1516-14392014005000091, 2014 1516-1439 10.1590/S1516-14392014005000091 http://www.scielo.br/scielo.php?script=sci_pdf&pid=S1516-14392014005000091&lng=en&nrm=iso&tlng=en |
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 |
Universidade Federal São Carlos. Departamento Engenharia Materials |
publisher.none.fl_str_mv |
Universidade Federal São Carlos. Departamento Engenharia Materials |
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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799132233774137344 |