| abstract |
Clinker or ternesite-calcium sulfoaluminate cement, obtainable by sintering a raw flour mixture, containing sources of CaO, Al2O3 (Fe2O3), SiO2 and SO3, characterized in that the raw flour mixture is sintered in a range of temperatures from> 1200 ° C to 1350 ° C for a time interval that is sufficient to transform the raw flour mixture into a clinker intermediate, typically 10 to 240 min, the clinker intermediate is tempered in a temperature range of 1200 ° C up to a limit below 750 ° C for a time that is sufficient to obtain the desired amount of C5S2 $, as well as reacting aluminate and ferrate phases, and remains of crystalline phases at high temperature of the raw materials, at least partially with C $ present, to Give C4 (AxF (1-x)) 3 and C5S2, typically 15 to 300 min, and the clinker is cooled with the main components C4 (AxF1-x) 3, (α; ß) C2S and C5S2 in the following fractions * C5S2 $ 5 at 75% by weight * C2S 1 to 80% by weight * C4 (AxF1-x) 3-5 to 70% by weight * secondary phases 0 to 30% by weight where x is a number from 0.1 to 1. |