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Rheological behavior of gypsum, plaster, and hydroxyapatite gel blends / Mohamed Raii in Industrial & engineering chemistry research, Vol. 51 N° 34 (Août 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 34 (Août 2012) . - pp. 11163-11169 Titre : Rheological behavior of gypsum, plaster, and hydroxyapatite gel blends Type de document : texte imprimé Auteurs : Mohamed Raii, Auteur ; Francisco Javier Escudero Sanz, Auteur ; Ange Nzihou, Auteur Année de publication : 2012 Article en page(s) : pp. 11163-11169 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Hydroxyapatite  Plaster Résumé : The rheological behavior of water―calcium sulfates and hydroxyapatite―calcium sulfates binary blends was considered in this study. These blends are to be used as permeable reactive barriers for groundwater remediation. The influence of gypsum and plaster on the rheological behavior of Ca-HAGel has been studied. The results show that all blends and formulations exhibit a shear-thinning effect and thixotropic behavior. The viscosity also depends on the level of concentration of the solid and the reactivity of the blends. The hydration of plaster causes cohesion and agglomeration between particles due to electrostatic forces, while the hydration of gypsum leads to dispersion due to repulsive forces between particles. The ζ potential was used in this study to understand the interaction between particles and its effect on the global behavior of the blends. The dissolution in water of sulfate ions containing calcium sulfate leads to a change in the surface charge of the blend. This allowed the dispersion or agglomeration of the mixtures to be predicted. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26299442 [article] Rheological behavior of gypsum, plaster, and hydroxyapatite gel blends [texte imprimé] / Mohamed Raii, Auteur ; Francisco Javier Escudero Sanz, Auteur ; Ange Nzihou, Auteur . - 2012 . - pp. 11163-11169. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 34 (Août 2012) . - pp. 11163-11169 Mots-clés : Hydroxyapatite  Plaster Résumé : The rheological behavior of water―calcium sulfates and hydroxyapatite―calcium sulfates binary blends was considered in this study. These blends are to be used as permeable reactive barriers for groundwater remediation. The influence of gypsum and plaster on the rheological behavior of Ca-HAGel has been studied. The results show that all blends and formulations exhibit a shear-thinning effect and thixotropic behavior. The viscosity also depends on the level of concentration of the solid and the reactivity of the blends. The hydration of plaster causes cohesion and agglomeration between particles due to electrostatic forces, while the hydration of gypsum leads to dispersion due to repulsive forces between particles. The ζ potential was used in this study to understand the interaction between particles and its effect on the global behavior of the blends. The dissolution in water of sulfate ions containing calcium sulfate leads to a change in the surface charge of the blend. This allowed the dispersion or agglomeration of the mixtures to be predicted. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26299442