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A kind of gypsum-based self-leveling mortar and its preparation method and gypsum-based self-leveling slurry

A self-leveling mortar and gypsum-based technology, applied in the field of gypsum-based self-leveling mortar and its preparation, gypsum-based self-leveling slurry, to achieve good sound insulation performance, good fluidity, and reduce fluctuations

Active Publication Date: 2020-12-22
BEIJING NEW BUILDING MATERIALS PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] SiO has not yet been used 2 Research report on the preparation of gypsum-based self-leveling floor mortar capable of controlling temperature and humidity by mixing airgel powder into gypsum-based materials

Method used

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  • A kind of gypsum-based self-leveling mortar and its preparation method and gypsum-based self-leveling slurry
  • A kind of gypsum-based self-leveling mortar and its preparation method and gypsum-based self-leveling slurry

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Step 1: (1) 2kg of silane coupling agent (model KH550, common commercially available product) is formulated with water into a 10% silane coupling agent solution; (2) 2kg of hydrophobic SiO 2 Airgel (provided by Zhejiang Shaoxing Nano Technology Co., Ltd., with a pore size of about 18nm) was added to the prepared silane coupling agent solution, and the above solution was placed in a particle mixer and mixed until the hydrophobic SiO 2 The airgel is completely dissolved in the silane coupling agent solution; (3) the SiO obtained above 2 The airgel solution and 14kg of Portland cement were placed in a ball mill for 4 minutes and then set aside.

[0066] Step 2: 45kg of 70-90 mesh fine river sand and 100kg of desulfurized gypsum (wherein, α hemihydrate gypsum is 50kg, β hemihydrate gypsum 50kg) are placed in a mixer and mixed evenly;

[0067] Step 3: Mix the powder obtained in step 2 with 0.04kg HyCon R 7200F organic retarder, 0.2kg Melflux5691F water reducer, 2kg redisper...

Embodiment 2

[0071] Step 1: (1) silane coupling agent (model KH550, common commercially available product) is mixed with water and is the silane coupling agent solution that mass fraction is 10%; (2) the hydrophobicity SiO of 3kg 2 Airgel (provided by Shanghai Yuna New Material Technology Co., Ltd., model TSP60SiO 2 , hydrophobic, the particle size is 60-80 mesh, and the pore diameter is 20-50 nanometers) is added to the prepared silane coupling agent solution, and the above solution is placed in a particle mixer and mixed until the hydrophobic SiO 2 The airgel is completely dissolved in the silane coupling agent solution; (3) the SiO obtained above 2 The airgel solution and 10kg of Portland cement were placed in a ball mill for 4 minutes and then set aside.

[0072] Step 2: 55kg of 70-90 mesh fine river sand and 100kg of desulfurized gypsum (wherein, α hemihydrate gypsum is 40kg, β hemihydrate gypsum 60kg) are placed in a mixer and mixed evenly;

[0073] Step 3: Mix the powder obtained ...

Embodiment 3

[0077] The difference between this embodiment and embodiment 1 is only:

[0078] SiO 2The airgel is 3kg; the fine river sand is 50kg; the retarder is a high-efficiency gypsum-based retarder Retardan P, and the dosage is 0.03kg; the latex powder is 3kg, and the stabilizer is 0.07kg.

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Abstract

The invention relates to a gypsum-based self-leveling mortar and a preparation method thereof. The gypsum-based self-leveling mortar comprises: SiO2 aerogel, Portland cement, desulfurization gypsum, aretarder, a water reducing agent, latex powder, a stabilizer and a filler, wherein the preparation method of the SiO2 aerogel comprises: preparing a silane coupling agent solution from a silane coupling agent and water, adding hydrophobic SiO2 aerogel into the silane coupling agent solution, and stirring until the hydrophobic SiO2 aerogel is completely dissolved in the silane coupling agent solution. The preparation method of the gypsum-based self-leveling mortar comprises: carrying out surface modification on a hydrophobic SiO2 aerogel by using a silane coupling agent; mixing the modified SiO2 aerogel and Portland cement, and carrying out ball milling; and adding other components, and uniformly mixing. The present invention further a gypsum-based self-leveling slurry prepared by using the gypsum-based self-leveling mortar. According to the present invention, the gypsum-based self-leveling mortar and the gypsum-based self-leveling slurry have advantages of good thermal insulation andgood sound insulation property.

Description

technical field [0001] The present application relates to but not limited to the technical field of new building materials, specifically to but not limited to a gypsum-based self-leveling mortar and a preparation method thereof, and a gypsum-based self-leveling slurry. Background technique [0002] Desulfurization gypsum is the industrial waste residue produced after desulfurization of flue gas in power plants. At present, the annual discharge of desulfurization gypsum has reached more than 70 million tons, of which about 40% of desulfurization gypsum is stored as waste. According to my country's energy planning forecast, in 2020 (the coal used for power generation will reach 2 billion tons), the emission of desulfurized gypsum will reach about 100 million tons. The comprehensive utilization of industrial by-product gypsum can not only reduce the exploitation of gypsum mine resources, but also have great significance to the protection of ecological environment. After analyz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14C04B14/06C04B20/02
CPCC04B14/064C04B20/023C04B28/144C04B28/147C04B2201/10C04B2201/20C04B2201/32C04B2201/50C04B7/02C04B14/068C04B2103/22C04B2103/302C04B2103/0057C04B2103/0068C04B22/002
Inventor 王丽
Owner BEIJING NEW BUILDING MATERIALS PLC
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