A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Ion transport mechanisms in cement-based materials
Most concrete deterioration problems involve the penetration of external ions within the structure of the material or the leaching of hydrated phases from the sold.. In many cases, both phenomena occur simultaneously. Given the increasing importance of durability problems, ion transport mechanisms in cement-based materials have been the subject of a great deal of research in the past decade. A survey of the most recent developments in this filed is presented in this paper. The theoretical aspects of the mechanisms of ion diffusion and migration in porous media are first reviewed. A specific section is devoted to the theoretical considerations pertaining to ion transport mechanism in cement-based materials. Emphasis is placed on the problems of ion-hydration product interaction . A section is also dedicated to laboratory test procedures deigned to study ion transport mechanism in cement-based materials and composites. Special attention is paid to migration testes involving the application of an electrical potential. Finally, a brief review of the various parameters affecting ion penetration in cement-based materials is presented. Given the important body of literature published on the subject, emphasis is placed on the penetration of chloride ions.
Ion transport mechanisms in cement-based materials
Most concrete deterioration problems involve the penetration of external ions within the structure of the material or the leaching of hydrated phases from the sold.. In many cases, both phenomena occur simultaneously. Given the increasing importance of durability problems, ion transport mechanisms in cement-based materials have been the subject of a great deal of research in the past decade. A survey of the most recent developments in this filed is presented in this paper. The theoretical aspects of the mechanisms of ion diffusion and migration in porous media are first reviewed. A specific section is devoted to the theoretical considerations pertaining to ion transport mechanism in cement-based materials. Emphasis is placed on the problems of ion-hydration product interaction . A section is also dedicated to laboratory test procedures deigned to study ion transport mechanism in cement-based materials and composites. Special attention is paid to migration testes involving the application of an electrical potential. Finally, a brief review of the various parameters affecting ion penetration in cement-based materials is presented. Given the important body of literature published on the subject, emphasis is placed on the penetration of chloride ions.
Ion transport mechanisms in cement-based materials
Marchand, J. (author) / Gerard, B. (author) / Delagrave, A. (author)
Materials Science of Concrete, Vol. 5 ; 307-399
1998
93 Seiten, 38 Bilder, 6 Tabellen, 142 Quellen
Article/Chapter (Book)
English
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