The influence of slightly and highly soluble carbonate salts on phase relations in hydrated calcium aluminate cements - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Materials Science Année : 2016

The influence of slightly and highly soluble carbonate salts on phase relations in hydrated calcium aluminate cements

(1) , (2) , (3) , (1) , (1) , (1) , (4) , (1)
1
2
3
4

Résumé

The addition of slightly (CaCO3) and highly soluble (Na2CO3) carbonate salts is expected to favor the formation of carboaluminate phases in hydrated calcium aluminate cements (CACs). A multi-method approach including X-ray diffraction, thermogravimetric analysis, and thermodynamic calculations is applied to highlight that the “conversion phenomena” in CACs cannot be mitigated by the formation of carboaluminate phases (monocarboaluminate: Mc and hemicarboaluminate: Hc) which are anticipated to form following the addition of carbonate salts. Here, carboaluminate phase formation is shown to depend on three factors: (1) water availability, (2) carbonate content of the salts, and their ability to mobilize CO3 2− species in solution, and (3) lime content associated with the carbonate salt. The latter two factors are linked to the composition and solubility of the carbonate agent. It is concluded that limestone (CaCO3), despite being a source of calcium and carbonate species, contributes only slightly to carboaluminate phase formation due to its low solubility and slow dissolution rate. Soluble carbonate salts (Na2CO3) fail to boost carboaluminate phase formation as the availability of Ca2+ ions and water are limiting. Detailed thermodynamic calculations are used to elucidate conditions that affect the formation of carboaluminate phases.
Fichier principal
Vignette du fichier
the-influence-of-slightly-and-highly-soluble-carbonate-salts.pdf (959.88 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02497797 , version 1 (09-03-2020)

Identifiants

Citer

Guillermo Puerta-Falla, Magdalena Balonis, Gwenn Le Saout, Aditya Kumar, Melanie Rivera, et al.. The influence of slightly and highly soluble carbonate salts on phase relations in hydrated calcium aluminate cements. Journal of Materials Science, 2016, 51 (12), pp.6062-6074. ⟨10.1007/s10853-016-9912-9⟩. ⟨hal-02497797⟩
38 Consultations
184 Téléchargements

Altmetric

Partager

Gmail Facebook Twitter LinkedIn More