The invention relates to an autoclaved desulfurized
gypsum aerated building block without
calcination. The autoclaved desulfurized
gypsum aerated building block is formed by directly modifying
solid wastes (such as desulfurized
gypsum) produced by wet desulphurization in thermal power plants, without calcinations. The invention relates to the technical field of resourceful comprehensive utilization. The aerated building block is prepared from the components of, by weight, 60-75 % of original state dihydrate desulfurized gypsum, 10-30% of vulcanic ash active mineral materials, 10-25% of active materials, 0.5-2% of accelerating materials, 0.5-2.0% of early strength materials, 0.1- 0.5% of gas forming materials. The preparation method comprises the steps of preparing raw materials, slurrying, pouring, standing for maintenance,
cutting, and autoclaving. By preparing the aerated building block, a lot of the
solid wastes-dihydrate desulfurized gypsum can be consumed, and resources can be saved because the aerated building block is prepared by direct modification and utilization without processes of calcining and
drying. The aerated building block is energy-saving, environment-friendly, low carbon and benefit for waste, and has good product performance, high strength, good
water resistance, and low cost.