Effect of the addition of metakaolin on the carbonation of Portland cement concretes

Detalhes bibliográficos
Autor(a) principal: SANTOS,B. S.
Data de Publicação: 2020
Outros Autores: ALBUQUERQUE,D. D. M., RIBEIRO,D.V.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista IBRACON de Estruturas e Materiais
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952020000100001
Resumo: Abstract Carbonation has been a concern of constructors and researchers because, by lowering the pH of the interstitial solution of the concrete, it can favor the post-deposition and subsequent corrosion of reinforced concrete reinforcement. Among the factors that influence carbonation is the use of pozzolanic materials, such as metakaolin. However, there is no consensus as to the positive or negative contribution of these additions. This work evaluated the influence of metakaolin on the mechanical properties, porosity and in particular on the carbonation of concrete, from the addition of 0%, 5%, 10% and 15% of metakaolin, in relation to the cement mass. From the results, it was observed that the addition of metakaolin, while not significantly influencing the porosity, gave the concrete a greater resistance to axial compression, a decrease in the capillary absorption and delayed the advance of the carbonation front in the concrete.
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spelling Effect of the addition of metakaolin on the carbonation of Portland cement concretesmetacaulimcarbonataçãoconcretoAbstract Carbonation has been a concern of constructors and researchers because, by lowering the pH of the interstitial solution of the concrete, it can favor the post-deposition and subsequent corrosion of reinforced concrete reinforcement. Among the factors that influence carbonation is the use of pozzolanic materials, such as metakaolin. However, there is no consensus as to the positive or negative contribution of these additions. This work evaluated the influence of metakaolin on the mechanical properties, porosity and in particular on the carbonation of concrete, from the addition of 0%, 5%, 10% and 15% of metakaolin, in relation to the cement mass. From the results, it was observed that the addition of metakaolin, while not significantly influencing the porosity, gave the concrete a greater resistance to axial compression, a decrease in the capillary absorption and delayed the advance of the carbonation front in the concrete.IBRACON - Instituto Brasileiro do Concreto2020-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952020000100001Revista IBRACON de Estruturas e Materiais v.13 n.1 2020reponame:Revista IBRACON de Estruturas e Materiaisinstname:Instituto Brasileiro do Concreto (IBRACON)instacron:IBRACON10.1590/s1983-41952020000100002info:eu-repo/semantics/openAccessSANTOS,B. S.ALBUQUERQUE,D. D. M.RIBEIRO,D.V.eng2020-03-24T00:00:00Zoai:scielo:S1983-41952020000100001Revistahttp://www.revistas.ibracon.org.br/index.php/riemhttps://old.scielo.br/oai/scielo-oai.phpeditores.riem@gmail.com||arlene@ibracon.org.br1983-41951983-4195opendoar:2020-03-24T00:00Revista IBRACON de Estruturas e Materiais - Instituto Brasileiro do Concreto (IBRACON)false
dc.title.none.fl_str_mv Effect of the addition of metakaolin on the carbonation of Portland cement concretes
title Effect of the addition of metakaolin on the carbonation of Portland cement concretes
spellingShingle Effect of the addition of metakaolin on the carbonation of Portland cement concretes
SANTOS,B. S.
metacaulim
carbonatação
concreto
title_short Effect of the addition of metakaolin on the carbonation of Portland cement concretes
title_full Effect of the addition of metakaolin on the carbonation of Portland cement concretes
title_fullStr Effect of the addition of metakaolin on the carbonation of Portland cement concretes
title_full_unstemmed Effect of the addition of metakaolin on the carbonation of Portland cement concretes
title_sort Effect of the addition of metakaolin on the carbonation of Portland cement concretes
author SANTOS,B. S.
author_facet SANTOS,B. S.
ALBUQUERQUE,D. D. M.
RIBEIRO,D.V.
author_role author
author2 ALBUQUERQUE,D. D. M.
RIBEIRO,D.V.
author2_role author
author
dc.contributor.author.fl_str_mv SANTOS,B. S.
ALBUQUERQUE,D. D. M.
RIBEIRO,D.V.
dc.subject.por.fl_str_mv metacaulim
carbonatação
concreto
topic metacaulim
carbonatação
concreto
description Abstract Carbonation has been a concern of constructors and researchers because, by lowering the pH of the interstitial solution of the concrete, it can favor the post-deposition and subsequent corrosion of reinforced concrete reinforcement. Among the factors that influence carbonation is the use of pozzolanic materials, such as metakaolin. However, there is no consensus as to the positive or negative contribution of these additions. This work evaluated the influence of metakaolin on the mechanical properties, porosity and in particular on the carbonation of concrete, from the addition of 0%, 5%, 10% and 15% of metakaolin, in relation to the cement mass. From the results, it was observed that the addition of metakaolin, while not significantly influencing the porosity, gave the concrete a greater resistance to axial compression, a decrease in the capillary absorption and delayed the advance of the carbonation front in the concrete.
publishDate 2020
dc.date.none.fl_str_mv 2020-02-01
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dc.language.iso.fl_str_mv eng
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dc.publisher.none.fl_str_mv IBRACON - Instituto Brasileiro do Concreto
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dc.source.none.fl_str_mv Revista IBRACON de Estruturas e Materiais v.13 n.1 2020
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