Patent ID: 8268071

Claim:
A sulfoaluminous clinker comprising, as phase composition, with respect to the total weight of the clinker: from 5 to 25% of calcium aluminoferrite phase with a composition corresponding to the general formula C 2 A x F (1-x ), with x varying from 0.2 to 0.8; from 15 to 35% of optionally iron-doped calcium sulfoaluminate phase corresponding to the formula C 4 A 3-y $F y , with y varying from 0 to 0.5; from 10 to 50% of belite C 2 S, said belite comprising at least 3% of C 2 S alpha polymorph; and from 2 to 25% of boron-doped calcium silicate corresponding to the formula C 11 S 4 B.