RAPID-SETTING AND HARDENING, HIGH-BELITE SULFOALUMINATE CEMENT CLINKER AS WELL AS APPLICATION AND PRODUCTION PROCESS THEREOF

摘要

The invention discloses a rapid-hardening high-belite calcium sulfoaluminate cement clinker and relates generally to a rapid-hardening high-belite calcium sulfoaluminate cement clinker and methods to use and to manufacture the clinker. The clinker of the present invention comprises 20% to 35% by weight of C4A3S 3% to 9% by weight of C4AF, 37% to 47% by weight of C2S, 0.5% to 4.6% by weight of f-Ca° and 14% to 26.3% by weight of CaSO4. The chemical compositions of the clinker are 12.9% to 16.1% by weight of SiO2, 12% to 19% by weight of Al2O3, 1% to 3% by weight of Fe2O3, 49% to 54% by weight of CaO and 12% to 18.43% by weight of SO3. It is manufactured by calcining, at a temperature of 1300° C.±50° C. in a rotary kiln, the raw meal, comprising 33% to 62% by weight of limestone, 10.5% to 28% by weight of fly ash, and 19% to 45% by weight of FGD gypsum. A group of rapid-hardening high-strength cements of various strength classes can be manufactured by mixing and grinding 26% to 97% by weight of clinker, 3% to 19% by weight of anhydrite and 0% to 55% by weight of granulated blast furnace slag.

主权项

1. A rapid-hardening high-belite calcium sulfoaluminate cement clinker, comprising the following major constituent components: C4A3S, C4AF, C2S and CaSO4, wherein said clinker contains 0.5% to 4.6% by weight of f-CaO.