The invention discloses a method for preparing
gypsum-based self-leveling material for use in
building material industry. The main material of the
gypsum-based self-leveling material is desulfurized
gypsum which is a desulfurization product from power plants. The method comprises: firstly, calcining the desulfurized gypsum in a calcining
kiln; and secondly, mixing calcined gypsum
powder accountingfor 50 to 78 percent of the total weight of the material, a
water reducer accounting for 0.1 to 1 percent of the total weight of the material, a
retarder accounting for 0.01 to 0.5 percent of the total weight of the material, a water-retaining agent accounting for 0.02 to 5 percent of the total weight of the material, a reinforcing agent accounting for 0 to 10 percent of the total weight of the material, re-dispersible
emulsion powder accounting for 0.2 to 1.5 percent of the total weight of the material, a
defoamer accounting for 0.05 to 0.2 percent of the total weight of the material, riversand accounting for 25 to 45 percent of total weight of the material and a filler accounting for 0 to 20 percent of the total weight of the material to obtain a the high-performance gypsum-based product. The invention provides a new method for producing high-quality gypsum-based self-leveling material characterized by high strength, high flowability, small contraction deformation and low cost by using the desulfurized gypsum, which provides a new way of comprehensively using desulfurized gypsum that is a
solid waste and fills the blank that the preparation of gypsum-based self-leveling materials from desulfurized gypsum lacks in China.