Patent ID: 8177903

Claim:
A composition comprising at least, in % expressed by mass relative to the total mass of the composition from 1 to 99% of a Portland clinker or Portland cement; and from 99 to 1% of a Belite-Calcium-Sulphoaluminate-Ferrite clinker (BCSAF) comprising at least, in % expressed by mass relative to the total mass of BCSAF clinker from 5 to 30%, of a calcium aluminoferrite phase of a composition corresponding to the general formula C 2 A X F (1-X ), wherein X is from 0.2 to 0.8; from 10 to 35%, of a calcium sulfoaluminate phase <<ye'elimite>> (C 4 A 3 $), from 40 to 75% of belite phase (C 2 S), from 0.01 to 10% of one or more minor phases selected from calcium sulphates, alkali sulphates, perovskite, gehlenite, free lime and periclase, and/or a vitreous phase, and for which the total of the percentages of said phases is greater than or equal to 97%.