Method for preparing gypsum-based self-leveling material by using desulfurization gypsum

A desulfurized gypsum, gypsum-based technology, applied in the field of gypsum-based self-leveling materials and their preparation, can solve the problems of high cost, poor strength, etc., and achieve the effects of low cost, excellent performance, and cheap and easily available raw materials

Inactive Publication Date: 2010-02-17
江苏仁和建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two mold powders have their own advantages and disadvantages. The former has superior performance but high cost, while the latter has low cost but poor strength.

Method used

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  • Method for preparing gypsum-based self-leveling material by using desulfurization gypsum
  • Method for preparing gypsum-based self-leveling material by using desulfurization gypsum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] By weight, 60 parts of gypsum powder prepared from desulfurized gypsum, 0.1 part of citric acid, 0.5 part of methyl cellulose ether, 3 parts of Portland cement, 0.3 part of polycarboxy water reducer, 0.1 part of defoamer, Put 1 part of redispersible latex powder into the mixer, mix for 20 minutes, the mixer speed is 60 rpm, and then mix with 35 parts of sand, the mixing time is 10 minutes, the stirring speed is 60 rpm, and the finished gypsum-based self-leveling is obtained 100 copies of materials.

Embodiment 2

[0028] By weight, 60 parts of gypsum powder prepared from desulfurized gypsum, 0.1 part of sodium citrate, 0.5 part of hydroxypropyl methylcellulose ether, 3 parts of Portland cement, 0.3 part of sulfonated melamine water reducer, 0.1 part of foaming agent and 1 part of redispersible latex powder are put into a mixer, mixed for 20 minutes, and the mixer speed is 60 rpm, and then mixed with 35 parts of sand, the mixing time is 10 minutes, and the stirring speed is 60 rpm, to obtain 100 parts of finished gypsum-based self-leveling material.

Embodiment 3

[0030] By weight, take 62.9 parts of gypsum powder prepared from desulfurized gypsum, 0.3 part of sodium polyphosphate, 0.5 part of hydroxypropyl methylcellulose ether, 0.2 part of sulfonated melamine water reducer, 0.1 part of defoamer, and Put 1 part of dispersed latex powder and 5 parts of talcum powder into the mixer, mix for 20 minutes, the mixer speed is 60 rpm, and then mix with 30 parts of sand, the mixing time is 10 minutes, the stirring speed is 60 rpm, and the finished gypsum is obtained Based on 100 parts of self-leveling material.

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Abstract

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.

Description

Technical field: [0001] The invention relates to a gypsum-based self-leveling material and a preparation method thereof, in particular to a method for preparing a gypsum-based self-leveling material by using desulfurized gypsum. Background technique: [0002] With the construction of a large number of desulfurization projects in thermal power plants in my country, the emission of desulfurized gypsum has increased sharply. At present, the utilization rate of desulfurized gypsum in my country is still very low, and most of them are still stored in storage. It has become the second largest after thermal power plant fly ash. Large solid waste. If the desulfurization gypsum is discarded and stockpiled, a special storage site needs to be built, which not only requires a huge investment, occupies a lot of valuable land resources, but also has an adverse impact on the surrounding living environment. Therefore, the use of desulfurized gypsum has an important impact on national enviro...

Claims

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Application Information

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IPC IPC(8): C04B11/26C04B28/14C04B111/62
Inventor 李东旭韩永圣权刘权
Owner 江苏仁和建材科技有限公司
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