Dehydrate desulfurated alpha high-strength gypsum based self-leveling mortar and production method thereof

Abstract

The invention relates to dehydrate desulfurated alpha high-strength gypsum based self-leveling mortar and a production method of the mortar. The invention relates to reuse of dihydrate desulfurization gypsum as solid waste generated in a coal-fired power plant and belongs to the technical field of a recycled comprehensive utilization of industrial by-product gypsum. The dehydrate desulfurated alpha high-strength gypsum based self-leveling mortar comprises 50 to 60% of alpha high-strength gypsum, 35 to 50% of an aggregate material, 1 to 5% of an exciting agent, 0.01 to 0.1 of a water-retaining agent, 0.5 to 2% of a binder, 0.1 to 1% of a water reducer, 1 to 3% of a auxiliary agent and 0.1 to 0.5% of a antifoaming agent, wherein the alpha high-strength gypsum comprises 80 to 100% of dihydrate desulfurization gypsum, 10 to 20% of water, 0.02 to 0.06% of a crystal habit modifier 1, and 0.02 to 0.06% of a crystal habit modifier 2. The production method of the invention comprises mixing the dihydrate desulfurization gypsum and crystal habit modifiers to obtain slurry, then treating the slurry through a sequence of steps of isothermal stirring, temperature maintaining, pH value regulating, dehydrating, drying and grinding to obtain the dehydrate desulfurated alpha high-strength gypsum, and mixing the dehydrate desulfurated alpha high-strength gypsum and additives comprising the aggregate and the like according to the above ratios and stoichiometric proportion to obtain the dehydrate desulfurated alpha high-strength gypsum based self-leveling mortar. The dehydrate desulfurated alpha high-strength gypsum based self-leveling mortar has the advantages of high strength, favorable flowability and low cost. The dehydrate desulfurated alpha high-strength gypsum based self-leveling mortar is not utilized in our country at present.

Description

technical field [0001] The invention belongs to the technical fields of desulfurization gypsum, the solid waste produced by desulfurization in power plants, turning waste into treasure, developing circular economy, low-carbon economy and comprehensive utilization of resources. It specifically relates to a kind of dihydrate desulfurization gypsum, which adopts advanced dynamic hydrothermal method and crystallization agent technology to produce very ideal hemihydrate gypsum crystals and obtain a-gypsum with the best quality. Then use a desulfurized gypsum as the base material and add various admixtures to produce a gypsum-based floor and self-leveling mortar. It can fill the blank in our country's market. Floor a gypsum self-leveling is developing all over the world. my country only has cement-based self-leveling, but there are few a-gypsum-based self-leveling, let alone dihydrate desulfurized gypsum-based a self-leveling mortar. It is a very good technical project to expand t...

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Problems solved by technology

[0003] At present, no similar technologies are being applied for invention patents