Influence of vinyl acetate-versatic vinylester copolymer on the microstructural characteristics of cement pastes
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Materials research (São Carlos. Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392005000100010 |
Resumo: | To understand the principles of polymer modification and its interference in the formation of some phases of Portland cement composites, several techniques are adopted such as Fourier Transform Infrared Spectroscopy and Thermogravimetric Analysis. In this study, these techniques were adopted to verify the influence of VA/VeoVA copolymer in seven pastes of high-early-strength portland cement twenty-eight days old, being four pastes with different polymer content and the same water/cement ratio, and the other three with extra water content increased by polymer content. In addition, scanning electronic microscopy was employed to verify the formation of copolymer film. The results showed possible interaction between acetate anion from the partial hydrolysis of copolymer and Ca++ ion from C2S and C3S hydration. Moreover, the magnitude of the decrease of portlandite formation is directly affected by water/cement ratio. By SEM analyses, the formation of two matrices, being one organic and the other inorganic, was also observed. |
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Influence of vinyl acetate-versatic vinylester copolymer on the microstructural characteristics of cement pastescement pastethermogravimetric analysisinfrared spectroscopyVA/VeoVATo understand the principles of polymer modification and its interference in the formation of some phases of Portland cement composites, several techniques are adopted such as Fourier Transform Infrared Spectroscopy and Thermogravimetric Analysis. In this study, these techniques were adopted to verify the influence of VA/VeoVA copolymer in seven pastes of high-early-strength portland cement twenty-eight days old, being four pastes with different polymer content and the same water/cement ratio, and the other three with extra water content increased by polymer content. In addition, scanning electronic microscopy was employed to verify the formation of copolymer film. The results showed possible interaction between acetate anion from the partial hydrolysis of copolymer and Ca++ ion from C2S and C3S hydration. Moreover, the magnitude of the decrease of portlandite formation is directly affected by water/cement ratio. By SEM analyses, the formation of two matrices, being one organic and the other inorganic, was also observed.ABM, ABC, ABPol2005-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392005000100010Materials Research v.8 n.1 2005reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392005000100010info:eu-repo/semantics/openAccessGomes,Carlos Eduardo MarmoratoFerreira,Osny PellegrinoFernandes,Mauro Robertoeng2005-03-24T00:00:00Zoai:scielo:S1516-14392005000100010Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2005-03-24T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Influence of vinyl acetate-versatic vinylester copolymer on the microstructural characteristics of cement pastes |
title |
Influence of vinyl acetate-versatic vinylester copolymer on the microstructural characteristics of cement pastes |
spellingShingle |
Influence of vinyl acetate-versatic vinylester copolymer on the microstructural characteristics of cement pastes Gomes,Carlos Eduardo Marmorato cement paste thermogravimetric analysis infrared spectroscopy VA/VeoVA |
title_short |
Influence of vinyl acetate-versatic vinylester copolymer on the microstructural characteristics of cement pastes |
title_full |
Influence of vinyl acetate-versatic vinylester copolymer on the microstructural characteristics of cement pastes |
title_fullStr |
Influence of vinyl acetate-versatic vinylester copolymer on the microstructural characteristics of cement pastes |
title_full_unstemmed |
Influence of vinyl acetate-versatic vinylester copolymer on the microstructural characteristics of cement pastes |
title_sort |
Influence of vinyl acetate-versatic vinylester copolymer on the microstructural characteristics of cement pastes |
author |
Gomes,Carlos Eduardo Marmorato |
author_facet |
Gomes,Carlos Eduardo Marmorato Ferreira,Osny Pellegrino Fernandes,Mauro Roberto |
author_role |
author |
author2 |
Ferreira,Osny Pellegrino Fernandes,Mauro Roberto |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Gomes,Carlos Eduardo Marmorato Ferreira,Osny Pellegrino Fernandes,Mauro Roberto |
dc.subject.por.fl_str_mv |
cement paste thermogravimetric analysis infrared spectroscopy VA/VeoVA |
topic |
cement paste thermogravimetric analysis infrared spectroscopy VA/VeoVA |
description |
To understand the principles of polymer modification and its interference in the formation of some phases of Portland cement composites, several techniques are adopted such as Fourier Transform Infrared Spectroscopy and Thermogravimetric Analysis. In this study, these techniques were adopted to verify the influence of VA/VeoVA copolymer in seven pastes of high-early-strength portland cement twenty-eight days old, being four pastes with different polymer content and the same water/cement ratio, and the other three with extra water content increased by polymer content. In addition, scanning electronic microscopy was employed to verify the formation of copolymer film. The results showed possible interaction between acetate anion from the partial hydrolysis of copolymer and Ca++ ion from C2S and C3S hydration. Moreover, the magnitude of the decrease of portlandite formation is directly affected by water/cement ratio. By SEM analyses, the formation of two matrices, being one organic and the other inorganic, was also observed. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005-03-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392005000100010 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392005000100010 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1516-14392005000100010 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
ABM, ABC, ABPol |
publisher.none.fl_str_mv |
ABM, ABC, ABPol |
dc.source.none.fl_str_mv |
Materials Research v.8 n.1 2005 reponame:Materials research (São Carlos. Online) instname:Universidade Federal de São Carlos (UFSCAR) instacron:ABM ABC ABPOL |
instname_str |
Universidade Federal de São Carlos (UFSCAR) |
instacron_str |
ABM ABC ABPOL |
institution |
ABM ABC ABPOL |
reponame_str |
Materials research (São Carlos. Online) |
collection |
Materials research (São Carlos. Online) |
repository.name.fl_str_mv |
Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR) |
repository.mail.fl_str_mv |
dedz@power.ufscar.br |
_version_ |
1754212657796218880 |