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Cement-based coatings for the protection of concrete and ferrous metals / P. Bennison in SURFACE COATINGS INTERNATIONAL, Vol. 80, N° 3 (03/1997)

Titre :	Cement-based coatings for the protection of concrete and ferrous metals
Type de document :	texte imprimé
Auteurs :	P. Bennison, Auteur
Année de publication :	1997
Article en page(s) :	p. 116-120
Langues :	Anglais (eng)
Tags :	'Revêtement protecteur' Ciment Béton Métal 'Etude expérimentale' Durabilité Porosité Perméabilité 'Composition matériau' 'Résistance mécanique' 'Rapport eau ciment' Hydrate Polymère
Index. décimale :	667.9 Revêtements et enduits
Résumé :	The ability of cement-based coatings to prevent corrosion is based on their high alkalinity of pH 12.5-13.0, which protects the steel from corrosion owing to the formation of a passive film of gamma Ferric oxide. This passive film is stabilised by the high concentrarion of hydroxyl ions in the pore electrolyte of the material which effectively stifles tha anodic dissolution of Ferrous ions so that the corrosion rate remains negligible. the high density and impermeability of the matrix protects the steel from water, oxygen, and chlorides.
Note de contenu :	- Durability of cement based products - Porosity and permeability - Materials which influence porosity and permeability in cement pastes - Pozzolanic materials - Polymer-modified cement-based materials - Cement/pozzolanic modified materials - Cement-bound protective coatings - Typical mechanical characteristics of cement-bound coatings
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