EP 3 081 546 A1

Rapid-setting and hardening, high-belite sulfoaluminate cement clinker as well as application and production process thereof

(22) 09.01.2015

(43) 19.10.2016

(57) 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-CaO and 14 % to 26.3 % by weight of CaSO4. The chemical compositions of the clinker are 12.9 % to 16.1 % by weight of Si02, 12 % to 19 % by weight of Al20, 1 % to 3 % by weight of Fe203, 49 % to 54 % by weight of CaO and 12 % to 18.43 % by weight of S03. 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.

(71) Tangshan Polar Bear Building Materials Co., Ltd., Tangshan, Hebei 063705 (CN)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES Fl FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated Extension States: BA ME

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