Effectiveness of surface coatings to protect reinforced concrete in marine environments

• Tipo: Artigo em Revista Científica Internacional
• Data: 2000

Autores

M. P. M. C. Rodrigues (Autor) Outra; Mário Rui N. Costa (Autor) FEUP; Adélio Mendes (Autor) FEUP; M. I. Eusébio Marques (Autor) Outra

Revista

Título: Materials and Structures/Materiaux et Constructions

Vol. 33 Nº 10

Páginas: 618-626

ISSN: 1359-5997

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 27 Citações

Scopus - 41 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia civil

Outras Informações

ID Authenticus: P-000-YBV

DOI: 10.1007/bf02480601

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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9