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The density of cement phases / M. Balonis in Cement and concrete research, Vol. 39 N° 9 (Septembre 2009) 

Public ISBD [article]  in Cement and concrete research > Vol. 39 N° 9 (Septembre 2009) . - pp. 733–739 Titre : The density of cement phases Type de document : texte imprimé Auteurs : M. Balonis, Auteur ; F.P. Glasser, Auteur Année de publication : 2009 Article en page(s) : pp. 733–739 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Density;  X-ray  diffraction;  Cement;  Crystal  structure;  Characterization Résumé : The densities of principal crystalline phases occurring in Portland cement are critically assessed and tabulated, in some cases with addition of new data. A reliable and self-consistent density set for crystalline phases was obtained by calculating densities from crystallographic data and unit cell contents. Independent laboratory work was undertaken to synthesize major AFm and AFt cement phases, determine their unit cell parameters and compare the results with those recorded in the literature. Parameters were refined from powder diffraction patterns using CELREF 2 software. A density value is presented for each phase, showing literature sources, in some cases describing limitations on the data, and the weighting attached to numerical values where an averaging process was used for accepted data. A brief discussion is made of the consequences of the packing of water to density changes in AFm and AFt structures. ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609001343 [article] The density of cement phases [texte imprimé] / M. Balonis, Auteur ; F.P. Glasser, Auteur . - 2009 . - pp. 733–739. Génie Civil Langues : Anglais (eng) in Cement and concrete research > Vol. 39 N° 9 (Septembre 2009) . - pp. 733–739 Mots-clés : Density;  X-ray  diffraction;  Cement;  Crystal  structure;  Characterization Résumé : The densities of principal crystalline phases occurring in Portland cement are critically assessed and tabulated, in some cases with addition of new data. A reliable and self-consistent density set for crystalline phases was obtained by calculating densities from crystallographic data and unit cell contents. Independent laboratory work was undertaken to synthesize major AFm and AFt cement phases, determine their unit cell parameters and compare the results with those recorded in the literature. Parameters were refined from powder diffraction patterns using CELREF 2 software. A density value is presented for each phase, showing literature sources, in some cases describing limitations on the data, and the weighting attached to numerical values where an averaging process was used for accepted data. A brief discussion is made of the consequences of the packing of water to density changes in AFm and AFt structures. ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609001343