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Substitution of aluminous cement by calcium carbonates in presence of carboxylic acid
Abstract : This paper presents results concerning the partial substitution of a calcium aluminate cement by calcium carbonate. The experimental parameters monitored in this study are the mechanical properties, the microstructure evolution through density measurements and the structure through analysis by X-ray diffraction. The major results of this study are the following: (1) It is possible to substitute a portion (10 wt%) of an aluminous cement by calcium carbonate, while improving the mechanical properties of the hardened material. This is achieved with a mass percentage of the carboxylic acid between 1 and 5%, relative to the dry mass, which acts as a good dispersant and leads therefore to densification of the hardened material. (2) When the mix consists of 50 wt% of aluminous cement and 50 wt% of calcium carbonate, the mechanical properties of the cured material are low and this happens whatever the percentage of added dispersant is.
https://hal-unilim.archives-ouvertes.fr/hal-01635680
Contributeur : Claire Douady <>
Soumis le : mercredi 15 novembre 2017 - 15:19:17
Dernière modification le : dimanche 16 février 2020 - 22:38:01
Contributeur : Claire Douady <>
Soumis le : mercredi 15 novembre 2017 - 15:19:17
Dernière modification le : dimanche 16 février 2020 - 22:38:01
