High performance sulfo-aluminous clinker
AssigneeItalcementi S.p.A.
InventorsMaurizio Iler Marchi, Stefano Allevi
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Abstract
The invention relates to a sulfo-aluminous clinker with optimal setting time and short term compressive strengths, comprising a mixture of the following phases: —calcium sulfoaluminate, or C4A3$, in amounts higher than 50% by weight of the mixture, —belite, or C25, in amounts between 2 and 23%, —3C25 3C$ CaX2, X being fluorine or chlorine, between 3 and 15% —C11A7CaX2, X being fluorine or chlorine, between 2 and 12%, both fluorine and chlorine being altogether present in the mixture, and phase C5S2$ being absent. The invention also relates to a method for preparing this sulfo-aluminous clinker, and hydraulic binders comprising this clinker.
Claims18
A sulfo-aluminous clinker comprising a mixture of:
- (i) calcium sulfoaluminate (C4A3$), in an amount greater than 50% by weight of said mixture,
- (ii) belite (C2S) in an amount ranging from 2% to 23% by weight of said mixture;
- (iii) 3C2S3C$CaX2, wherein X is fluorine or chlorine, in an amount ranging from 3% to 15% by weight of said mixture;
- and
- (iv) C11A7CaX2, wherein X is fluorine or chlorine, in an amount ranging from 2% to 12% by weight of said mixture;
- wherein both fluorine and chlorine are present in said mixture, and C5S2$ is absent therefrom.
Dependencies are inferred from the claim text.