Utilize este identificador para referenciar este registo: http://hdl.handle.net/1822/54753

TítuloBehaviour of concrete under severe environment: effect of carbonation on the chloride diffusion coefficient from non-steady-state migration test
Autor(es)Malheiro, Raphaele Lira Meireles Castro
Camões, Aires
Meira, Gibson
Palavras-chaveCarbonation
Chloride
Combined action
Concrete
Migration test
DataJan-2018
EditoraFoundation for Materials Science and Engineering “serban Solacolu”
RevistaRomanian Journal of Materials
CitaçãoMalheiro R., Camões A., Meira G. Behaviour of Concrete Under Severe Environment - Effect of Carbonation on the Chloride Diffusion Coefficient from Non-Steady-State Migration Test, Romanian Journal of Materials, Vol. 48, Issue 1, pp. 64-69, 1583-3186, 2018
Resumo(s)To ensure the durability of concrete structures it is necessary to understand its behaviour in the presence of aggressive agents. Carbonation and chloride ingress are the two main causes of degradation in reinforced concrete. The combination of these factors can create a very harsh environment for concrete structures. Given the importance of chloride migration coefficient for areas such as service life prediction, this work intends to study the influence of carbonation on the chloride migration coefficient of ordinary Portland cement (OPC) concrete. Concrete specimens were cast with different water-cement ratios: 0.4, 0.5 and 0.6. After 90 days of curing, half of samples were subjected to carbonation chamber (4% CO2, 20 ºC and 55% RH) for 6 months. The other half was protected with plastic sheet during the same period. Non-steady-state migration test was performed in specimens with and without exposure to carbon dioxide environment. The results show that, for these conditions, the carbonation has a direct influence on chloride diffusion coefficient, increasing it. The carbonated samples studied showed a chloride migration coefficient up to 130% higher than noncarbonated ones. This fact can be related to the reduce in chloride binding capacity caused by carbonation front.
Tipoarticle
URIhttp://hdl.handle.net/1822/54753
ISSN1583-3186
Versão da editorahttp://solacolu.chim.upb.ro/p64-69.pdf
Arbitragem científicayes
AcessoopenAccess
Aparece nas coleções:C-TAC - Artigos em Revistas Internacionais

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