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Effectiveness of surface coatings to protect reinforced concrete in marine environments

Title
Effectiveness of surface coatings to protect reinforced concrete in marine environments
Type
Article in International Scientific Journal
Year
2000
Authors
M. P. M. C. Rodrigues
(Author)
Other
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Mário Rui N. Costa
(Author)
FEUP
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Adélio Mendes
(Author)
FEUP
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M. I. Eusébio Marques
(Author)
Other
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Journal
Vol. 33 No. 10
Pages: 618-626
ISSN: 1359-5997
Publisher: Springer Nature
Scientific classification
FOS: Engineering and technology > Civil engineering
Other information
Authenticus ID: P-000-YBV
Abstract (EN): Coatings can contribute to extending service life of concrete structures exposed to marine environments by reducing the rate of chloride penetration. In the present paper, the effect of coatings on the rate of chloride uptake was studied by measuring their concentration profiles at different times, extending up to 24 months. Using a solution of the so-called Fick's second law of diffusion, least-square fitting leads to the value of chloride concentration under the coating (C-0) which allowed us to compare the effectiveness of different coatings. Depending on the formulation, some of the studied acrylic coatings could reduce the value of C-0 by more than 80% in comparison to the unpainted concrete. Water permeability coefficients were measured for the same coating;, according to EN 1062-3. The ranking of effectiveness to stop chlorides is the same as the water imperviousness, but the minimum requirement proposed by prEN 1504-2 (0.1 kg.m(-2).h(-0.5)) did not prove to be enough for an efficient protection against chloride permeation.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 9
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