High belite-containing sulfoaluminous clinker, method for...

C - Chemistry – Metallurgy – 04 – B

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C04B 7/32 (2006.01) C04B 28/06 (2006.01)

Patent

CA 2574532

The invention relates to a belite-sulfoaluminous clinker, to a method for the Production and the use thereof for preparing hydraulic binders comprising the following mineralogical composition: 5 to 35 %, preferably 10 to 20 % a calcium aluminoferrite phase whose composition corresponds to a general formula C2AXF(1-X), wherein X ranges from 0.2 to 0.8, 15 to 35 %, preferably 20 to 30 % a calcium sulphoaluminate phase ~yee' limite~ (C4A3$), 40 to 75 %, preferably 45 to 65 % belite (C2S), 0.1 to 10 % one or several mineral phases selected form calcium sulphates, alkali sulphates, perovskite, calcium aluminates, gehlenite, free lime, periclase and/or a vitreous phase and at least a secondary element selected from sulfur, magnesium, sodium, potassium, boron, phosphorus, zinc, manganese, titanium, fluorine, chlorine, wherein the total content of said secondary elements is equal to or less than 15 %.

L'invention concerne un clinker bélite-sulfoalumineux, à son procédé de fabrication et à son utilisation pour la préparation de liants hydrauliques, et comprenant comme composition minéralogique : - 5 à 25%, préférentiellement 10 à 20%, de phase aluminoferrite calcique d'une composition correspondant à la formule générale C2AXF(1-X), avec X compris entre 0,2 et 0,8. - 15 à 35%, préférentiellement 20 à 30%, de phase sulfoaluminate de calcium « yee' limite » (C4A3$), - 40 à 75%, préférentiellement 45 à 65% bélite (C2S), - de 0,01 à 10% d'une ou plusieurs phases mineures choisies parmi les sulfates de calcium, les sulfates alcalins, la perovskite, les aluminates de calcium, la géhlénite, la chaux libre et la périclase, et/ou une phase vitreuse, - et au moins un élément secondaire choisi parmi le soufre, le magnésium, le sodium, le potassium, le bore, le phosphore, le zinc, le manganèse, le titane, le fluor, le chlore, la teneur totale desdits éléments secondaires étant inférieure ou égale à 15%.

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