Proposal of a digital image analysis method for determining the carbonated front in concretes

Detalhes bibliográficos
Autor(a) principal: Silveira,Rodrigo Goettems da
Data de Publicação: 2022
Outros Autores: Isaia,Geraldo Cechella
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Ambiente construído (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-86212022000300275
Resumo: Abstract Carbonation is one of the most common pathologies in concretes and the correct determination of the depth reached by this process is essential to predict the lifespan of a structure. The most common method for measuring carbonation is to spray a phenolphthalein solution onto the concrete and then measure the colorless area of the solution. Traditionally, such measurement is done manually through visual assessment. However, as this is a subjective assessment, this process is subject to errors. In order to minimize these errors, researchers have used image editing processes and measurements obtained with computerized tools. Even using these programs, the process still depends on the operator’s sensitivity and judgment to determine the areas affected by carbonation. This work proposes a digital analysis with the assignment of phenolphthalein turning pH values in order to obtain the carbonated front limit with greater precision and in a semi-quantitative way. For this, three admixtures of concrete with pozzolans (fly ash and rice husk ash) were analyzed in binary and ternary mixtures submitted to natural carbonation. The proposed method proved to be accurate and efficient as an aid in reading carbonated depths.
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spelling Proposal of a digital image analysis method for determining the carbonated front in concretesCarbonationCarbonation frontDurabilityDigital imagensAbstract Carbonation is one of the most common pathologies in concretes and the correct determination of the depth reached by this process is essential to predict the lifespan of a structure. The most common method for measuring carbonation is to spray a phenolphthalein solution onto the concrete and then measure the colorless area of the solution. Traditionally, such measurement is done manually through visual assessment. However, as this is a subjective assessment, this process is subject to errors. In order to minimize these errors, researchers have used image editing processes and measurements obtained with computerized tools. Even using these programs, the process still depends on the operator’s sensitivity and judgment to determine the areas affected by carbonation. This work proposes a digital analysis with the assignment of phenolphthalein turning pH values in order to obtain the carbonated front limit with greater precision and in a semi-quantitative way. For this, three admixtures of concrete with pozzolans (fly ash and rice husk ash) were analyzed in binary and ternary mixtures submitted to natural carbonation. The proposed method proved to be accurate and efficient as an aid in reading carbonated depths.Associação Nacional de Tecnologia do Ambiente Construído - ANTAC2022-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-86212022000300275Ambiente Construído v.22 n.3 2022reponame:Ambiente construído (Online)instname:Associação Nacional de Tecnologia do Ambiente Construído (ANTAC)instacron:ANTAC10.1590/s1678-86212022000300619info:eu-repo/semantics/openAccessSilveira,Rodrigo Goettems daIsaia,Geraldo Cechellaeng2022-05-20T00:00:00Zoai:scielo:S1678-86212022000300275Revistahttps://seer.ufrgs.br/ambienteconstruidohttps://old.scielo.br/oai/scielo-oai.php||ambienteconstruido@ufrgs.br1678-86211415-8876opendoar:2022-05-20T00:00Ambiente construído (Online) - Associação Nacional de Tecnologia do Ambiente Construído (ANTAC)false
dc.title.none.fl_str_mv Proposal of a digital image analysis method for determining the carbonated front in concretes
title Proposal of a digital image analysis method for determining the carbonated front in concretes
spellingShingle Proposal of a digital image analysis method for determining the carbonated front in concretes
Silveira,Rodrigo Goettems da
Carbonation
Carbonation front
Durability
Digital imagens
title_short Proposal of a digital image analysis method for determining the carbonated front in concretes
title_full Proposal of a digital image analysis method for determining the carbonated front in concretes
title_fullStr Proposal of a digital image analysis method for determining the carbonated front in concretes
title_full_unstemmed Proposal of a digital image analysis method for determining the carbonated front in concretes
title_sort Proposal of a digital image analysis method for determining the carbonated front in concretes
author Silveira,Rodrigo Goettems da
author_facet Silveira,Rodrigo Goettems da
Isaia,Geraldo Cechella
author_role author
author2 Isaia,Geraldo Cechella
author2_role author
dc.contributor.author.fl_str_mv Silveira,Rodrigo Goettems da
Isaia,Geraldo Cechella
dc.subject.por.fl_str_mv Carbonation
Carbonation front
Durability
Digital imagens
topic Carbonation
Carbonation front
Durability
Digital imagens
description Abstract Carbonation is one of the most common pathologies in concretes and the correct determination of the depth reached by this process is essential to predict the lifespan of a structure. The most common method for measuring carbonation is to spray a phenolphthalein solution onto the concrete and then measure the colorless area of the solution. Traditionally, such measurement is done manually through visual assessment. However, as this is a subjective assessment, this process is subject to errors. In order to minimize these errors, researchers have used image editing processes and measurements obtained with computerized tools. Even using these programs, the process still depends on the operator’s sensitivity and judgment to determine the areas affected by carbonation. This work proposes a digital analysis with the assignment of phenolphthalein turning pH values in order to obtain the carbonated front limit with greater precision and in a semi-quantitative way. For this, three admixtures of concrete with pozzolans (fly ash and rice husk ash) were analyzed in binary and ternary mixtures submitted to natural carbonation. The proposed method proved to be accurate and efficient as an aid in reading carbonated depths.
publishDate 2022
dc.date.none.fl_str_mv 2022-09-01
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=S1678-86212022000300275
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-86212022000300275
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/s1678-86212022000300619
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Associação Nacional de Tecnologia do Ambiente Construído - ANTAC
publisher.none.fl_str_mv Associação Nacional de Tecnologia do Ambiente Construído - ANTAC
dc.source.none.fl_str_mv Ambiente Construído v.22 n.3 2022
reponame:Ambiente construído (Online)
instname:Associação Nacional de Tecnologia do Ambiente Construído (ANTAC)
instacron:ANTAC
instname_str Associação Nacional de Tecnologia do Ambiente Construído (ANTAC)
instacron_str ANTAC
institution ANTAC
reponame_str Ambiente construído (Online)
collection Ambiente construído (Online)
repository.name.fl_str_mv Ambiente construído (Online) - Associação Nacional de Tecnologia do Ambiente Construído (ANTAC)
repository.mail.fl_str_mv ||ambienteconstruido@ufrgs.br
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