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Sulfur speciation in granulated blast furnace slag: An X-ray absorption spectroscopic investigation / Amitava Roy in Cement and concrete research, Vol. 39 N° 8 (Août 2009) 

Public ISBD [article]  in Cement and concrete research > Vol. 39 N° 8 (Août 2009) . - pp. 659–663 Titre : Sulfur speciation in granulated blast furnace slag: An X-ray absorption spectroscopic investigation Type de document : texte imprimé Auteurs : Amitava Roy, Auteur Année de publication : 2009 Article en page(s) : pp. 659–663 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Glass;  Spectroscopy;  Granulated  blast  furnace  slag;  Sulfate Résumé : Sulfur speciation in a granulated blast furnace slag (GGBFS) was analyzed by X-ray absorption near edge structure spectroscopy (XANES) before and after activation by saturated calcium hydroxide and five normal sodium hydroxide solutions. The solution to GGBFS ratio was 0.4. XANES showed that sulfur in GGBFS existed mostly as sulfides (frozen in calcium polyhedra) with a minor amount as sulfate. A slowly-cooled blast furnace slag, in contrast, had most of the sulfide transformed to sulfate. After activation of GGBFS, more sulfate formed and crystalline sulfide phases became more apparent. More slag reacted at lower pH than at higher pH. ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609001215 [article] Sulfur speciation in granulated blast furnace slag: An X-ray absorption spectroscopic investigation [texte imprimé] / Amitava Roy, Auteur . - 2009 . - pp. 659–663. Génie Civil Langues : Anglais (eng) in Cement and concrete research > Vol. 39 N° 8 (Août 2009) . - pp. 659–663 Mots-clés : Glass;  Spectroscopy;  Granulated  blast  furnace  slag;  Sulfate Résumé : Sulfur speciation in a granulated blast furnace slag (GGBFS) was analyzed by X-ray absorption near edge structure spectroscopy (XANES) before and after activation by saturated calcium hydroxide and five normal sodium hydroxide solutions. The solution to GGBFS ratio was 0.4. XANES showed that sulfur in GGBFS existed mostly as sulfides (frozen in calcium polyhedra) with a minor amount as sulfate. A slowly-cooled blast furnace slag, in contrast, had most of the sulfide transformed to sulfate. After activation of GGBFS, more sulfate formed and crystalline sulfide phases became more apparent. More slag reacted at lower pH than at higher pH. ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609001215