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Original Articles

Pore structure of mortar

Influence of cement base and curing

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Pages 699-714 | Published online: 04 Oct 2011
 

ABSTRACT

Because of considerations related to sustainable development issues, namely the decreasing of carbon dioxide emissions, the use of CEM III cement to replace CEM I is to be developed. This study shows the influence of curing and of cement types on the porous structure of mortars made up of CEM III A and C compared with CEM I and highlights a skin phenomenon having an effect on water transfer properties. The adaptation of different methods traditionally used in petrophysics and the use of an original approach based on scanned thermal conductivity measures have helped to characterise the porous network involved and its evolution.

RÉSUMÉ

Pour satisfaire les critères de développement durable et diminuer les émissions de dioxyde de carbone, l'utilisation de ciment de type CEM III à la place du CEM I est à développer. Cette étude montre l'influence de la cure et du ciment sur la structure poreuse de mortiers de CEM III A et C comparés au CEM I et met en évidence un phénomène de peau affectant les propriétés de transfert hydrique. L'adaptation de différentes méthodes d'analyse de la porosité utilisées traditionnellement en pétrophysique et d'une méthode originale, basée sur des mesures de conductivité thermique à l'aide d'un scanneur de conductivité thermique, ont permis de caractériser le réseau poreux et son évolution à travers les échantillons de mortier.

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