Ceramics-Silikáty 39 (2) 63-67 (1995)

PREPARATION OF THE HIGH IRON SULFOALUMINATE BELITE CEMENTS FROM RAW MIXTURES INCORPORATING INDUSTRIAL WASTES

M. Palou, J. Majling

High iron sulfoaluminate belites were synthesized using different kinds of raw components, maintaining the equal chemical composition of raw mixtures. A blast furnace slag, two kinds of brown muds and two kinds of fly ashes were used as waste raw components and limestone and bauxite as the natural raw components. Pure gypsum and gibbsite were used as the additional raw components. Raw mixture compositions were calculated by an especially designed procedure. The difference in properties of cements is seen from the development of their mechanical strength and from the rate of a heat liberation at early stage of hydration. The mechanical strength of specimens (28 days compressive strength in the range of 33 to 64 MPa) justifies the use of specified wastes for the preparation of title cement clinkers.