Dehydrate desulfurated alpha high-strength gypsum based self-leveling mortar and production method thereof
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A technology of self-leveling mortar and desulfurized gypsum, which is applied in the field of solid waste, can solve the problems of undetected similar technologies and achieve the effect of broadening the scope of application
Inactive Publication Date: 2011-09-21
SHANGHAI JINMA BUILDING MATERIALS
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[0003] At present, no similar technologie
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Embodiment 1
[0060] The proportion of raw materials in this case is as follows:
[0061] 1) Preparation of a high-strength gypsum from dihydrate desulfurized gypsum:
[0076] The present invention dihydrate desulfurization a high-strength gypsum-based self-leveling mortar and a production method thereof, the steps comprising:
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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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