Patent ID: 8574359

Claim:
A sulfo-aluminous clinker comprising a mixture of: (i) calcium sulfoaluminate (C 4 A 3 $), in an amount greater than 50% by weight of said mixture, (ii) belite (C 2 S) in an amount ranging from 2% to 23% by weight of said mixture; (iii) 3C 2 S3C$CaX 2 , wherein X is fluorine or chlorine, in an amount ranging from 3% to 15% by weight of said mixture; and (iv) C 11 A 7 CaX 2 , 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 C 5 S 2 $ is absent therefrom.