Corrosion of reinforcing bars embedded in alkali-activated slag concrete subjected to chloride attack

Detalhes bibliográficos
Autor(a) principal: Chaparro,William Aperador
Data de Publicação: 2012
Outros Autores: Ruiz,Jorge Hernando Bautista, Gómez,Robinson de Jesús Torres
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=S1516-14392012000100009
Resumo: Steel bar embedded in an alkali-activated slag (AAS) concrete was tested under complete immersion, in 3.5% NaCl solution by weight of the slag. Ordinary Portland cement (OPC) was also tested for comparative purposes and exposed to the same solution. Monitoring of open-circuit potential, polarization resistance measurement and electrochemical impedance spectroscopy (EIS) were used to evaluate the corrosion behavior of steel bar. The corrosion resistances of AAS and OPC concretes were performed at 0, 3, 6, 9 and 12 months. Electrochemical measurements shows that AAS concrete presents passive corrosion behavior the first 3 months, after this period of time, it presents corrosion resistance decreased due to the chlorides presence at the steel/AAS interface. For 0 months immersion (28 days of curing) the AAS and OPC concretes presented a 10% of corrosion probability. After 3 months of immersion the tested AAS and OPC concretes showed similar behavior, the active potentials in the range from "0.2 to "0.6 V vs. Cu/CuSO4, indicate a 90% probability of corrosion.
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spelling Corrosion of reinforcing bars embedded in alkali-activated slag concrete subjected to chloride attackcorrosionalkali-activated cementchloride ionelectrochemical measurementsSteel bar embedded in an alkali-activated slag (AAS) concrete was tested under complete immersion, in 3.5% NaCl solution by weight of the slag. Ordinary Portland cement (OPC) was also tested for comparative purposes and exposed to the same solution. Monitoring of open-circuit potential, polarization resistance measurement and electrochemical impedance spectroscopy (EIS) were used to evaluate the corrosion behavior of steel bar. The corrosion resistances of AAS and OPC concretes were performed at 0, 3, 6, 9 and 12 months. Electrochemical measurements shows that AAS concrete presents passive corrosion behavior the first 3 months, after this period of time, it presents corrosion resistance decreased due to the chlorides presence at the steel/AAS interface. For 0 months immersion (28 days of curing) the AAS and OPC concretes presented a 10% of corrosion probability. After 3 months of immersion the tested AAS and OPC concretes showed similar behavior, the active potentials in the range from "0.2 to "0.6 V vs. Cu/CuSO4, indicate a 90% probability of corrosion.ABM, ABC, ABPol2012-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392012000100009Materials Research v.15 n.1 2012reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392011005000096info:eu-repo/semantics/openAccessChaparro,William AperadorRuiz,Jorge Hernando BautistaGómez,Robinson de Jesús Torreseng2012-02-23T00:00:00Zoai:scielo:S1516-14392012000100009Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2012-02-23T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Corrosion of reinforcing bars embedded in alkali-activated slag concrete subjected to chloride attack
title Corrosion of reinforcing bars embedded in alkali-activated slag concrete subjected to chloride attack
spellingShingle Corrosion of reinforcing bars embedded in alkali-activated slag concrete subjected to chloride attack
Chaparro,William Aperador
corrosion
alkali-activated cement
chloride ion
electrochemical measurements
title_short Corrosion of reinforcing bars embedded in alkali-activated slag concrete subjected to chloride attack
title_full Corrosion of reinforcing bars embedded in alkali-activated slag concrete subjected to chloride attack
title_fullStr Corrosion of reinforcing bars embedded in alkali-activated slag concrete subjected to chloride attack
title_full_unstemmed Corrosion of reinforcing bars embedded in alkali-activated slag concrete subjected to chloride attack
title_sort Corrosion of reinforcing bars embedded in alkali-activated slag concrete subjected to chloride attack
author Chaparro,William Aperador
author_facet Chaparro,William Aperador
Ruiz,Jorge Hernando Bautista
Gómez,Robinson de Jesús Torres
author_role author
author2 Ruiz,Jorge Hernando Bautista
Gómez,Robinson de Jesús Torres
author2_role author
author
dc.contributor.author.fl_str_mv Chaparro,William Aperador
Ruiz,Jorge Hernando Bautista
Gómez,Robinson de Jesús Torres
dc.subject.por.fl_str_mv corrosion
alkali-activated cement
chloride ion
electrochemical measurements
topic corrosion
alkali-activated cement
chloride ion
electrochemical measurements
description Steel bar embedded in an alkali-activated slag (AAS) concrete was tested under complete immersion, in 3.5% NaCl solution by weight of the slag. Ordinary Portland cement (OPC) was also tested for comparative purposes and exposed to the same solution. Monitoring of open-circuit potential, polarization resistance measurement and electrochemical impedance spectroscopy (EIS) were used to evaluate the corrosion behavior of steel bar. The corrosion resistances of AAS and OPC concretes were performed at 0, 3, 6, 9 and 12 months. Electrochemical measurements shows that AAS concrete presents passive corrosion behavior the first 3 months, after this period of time, it presents corrosion resistance decreased due to the chlorides presence at the steel/AAS interface. For 0 months immersion (28 days of curing) the AAS and OPC concretes presented a 10% of corrosion probability. After 3 months of immersion the tested AAS and OPC concretes showed similar behavior, the active potentials in the range from "0.2 to "0.6 V vs. Cu/CuSO4, indicate a 90% probability of corrosion.
publishDate 2012
dc.date.none.fl_str_mv 2012-02-01
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=S1516-14392012000100009
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392012000100009
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392011005000096
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.15 n.1 2012
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
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