CN112321257A - Environment-friendly waterproof plastering gypsum and preparation method thereof - Google Patents

Environment-friendly waterproof plastering gypsum and preparation method thereof Download PDF

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Publication number
CN112321257A
CN112321257A CN202011371875.4A CN202011371875A CN112321257A CN 112321257 A CN112321257 A CN 112321257A CN 202011371875 A CN202011371875 A CN 202011371875A CN 112321257 A CN112321257 A CN 112321257A
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parts
modified
gypsum
water
environment
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张中会
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Suzhou Hongchuan Building Materials Co ltd
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Suzhou Hongchuan Building Materials Co ltd
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Priority to CN202011371875.4A priority Critical patent/CN112321257A/en
Publication of CN112321257A publication Critical patent/CN112321257A/en
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
    • C04B28/142—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/06—Quartz; Sand
    • C04B14/062—Microsilica, e.g. colloïdal silica
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/08—Diatomaceous earth
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/023—Chemical treatment
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/04—Heat treatment
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials

Abstract

The environment friendly waterproof plastering gypsum consists of modified fluorgypsum 70-80 weight portions, water retaining agent 15-25 weight portions, modified nanometer silica 10-20 weight portions, rubber powder 10-20 weight portions, modified diatomite 30-40 weight portions, bentonite 20-30 weight portions, retarder 1-2 weight portions, river sand 30-40 weight portions, perfume 10-20 weight portions and water 200-300 weight portions. The environment-friendly waterproof plastering gypsum adopts the fluorine gypsum waste residue as a main production raw material, realizes the reutilization of waste resources, and is more energy-saving and environment-friendly; the modified nano silicon dioxide is utilized, so that the corrosion resistance, the impact resistance, the heat resistance and the hydrophobicity of the plastering gypsum are improved, and the photocatalytic effect is favorable for energy conservation and environmental protection; the water retention performance of the plastering gypsum is enhanced through the modified diatomite, and deformation and falling off are reduced; in addition, the preparation process of the environment-friendly waterproof plastering gypsum is simple, and the production cost is effectively reduced by recycling waste resources.

Description

Environment-friendly waterproof plastering gypsum and preparation method thereof
Technical Field
The invention relates to the field of building materials, in particular to environment-friendly waterproof plastering gypsum and a preparation method thereof.
Background
The plastering gypsum is divided into surface layer plastering gypsum (F), bottom layer plastering gypsum (B) and heat-insulating layer plastering gypsum (T) according to the application. Wherein: facing render gypsum (F) is typically free of aggregate and is used to render an outermost layer of render material on a gypsum or other substrate; the bottom stucco gypsum typically contains aggregate for substrate leveling; the heat-insulating layer plastering gypsum has better heat insulation property, usually contains light aggregate, and the volume density of a hardened body is not more than 500kg/m for carrying out the year. The existing plastering gypsum has strong water absorption and lacks of adhesion, so that the wall surface is easy to be affected with damp, and phenomena of hollowing, powder falling and the like occur, thus affecting the beauty of the wall.
In order to solve the problems, the application provides environment-friendly waterproof plastering gypsum and a preparation method thereof.
Disclosure of Invention
Objects of the invention
In order to solve the technical problems in the background art, the invention provides environment-friendly waterproof plastering gypsum and a preparation method thereof. The environment-friendly waterproof plastering gypsum adopts the fluorine gypsum waste residue as a main production raw material, realizes the reutilization of waste resources, and is more energy-saving and environment-friendly; the modified nano silicon dioxide is utilized, so that the corrosion resistance, the impact resistance, the heat resistance and the hydrophobicity of the plastering gypsum are improved, and the photocatalytic effect is favorable for energy conservation and environmental protection; the water retention performance of the plastering gypsum is enhanced through the modified diatomite, and deformation and falling off are reduced; in addition, the preparation process of the environment-friendly waterproof plastering gypsum is simple, and the production cost is effectively reduced by recycling waste resources.
(II) technical scheme
In order to solve the problems, the invention provides environment-friendly waterproof plastering gypsum which comprises, by weight, 70-80 parts of modified fluorgypsum, 15-25 parts of a water-retaining agent, 10-20 parts of modified nano silicon dioxide, 10-20 parts of rubber powder, 30-40 parts of modified diatomite, 20-30 parts of bentonite, 1-2 parts of a retarder, 30-40 parts of river sand, 10-20 parts of a flavoring agent and 200-300 parts of water.
Preferably, the modified nano-silica modified fluorine gypsum comprises, by weight, 70 parts of modified fluorine gypsum, 15 parts of a water-retaining agent, 10 parts of modified nano-silica, 10 parts of rubber powder, 30 parts of modified diatomite, 20 parts of bentonite, 1 part of a retarder, 30 parts of river sand, 10 parts of a flavoring agent and 200 parts of water.
Preferably, the modified nano-silica modified fluorine gypsum comprises 80 parts of modified fluorine gypsum, 25 parts of water-retaining agent, 20 parts of modified nano-silica, 20 parts of rubber powder, 40 parts of modified diatomite, 30 parts of bentonite, 2 parts of retarder, 40 parts of river sand, 20 parts of flavoring agent and 300 parts of water according to weight ratio.
Preferably, the modified nano-silica modified fluorine gypsum comprises 75 parts of modified fluorine gypsum, 20 parts of water-retaining agent, 15 parts of modified nano-silica, 15 parts of rubber powder, 35 parts of modified diatomite, 25 parts of bentonite, 1.5 parts of retarder, 35 parts of river sand, 15 parts of flavoring agent and 250 parts of water according to weight ratio.
Preferably, the water retention agent is methylcellulose.
Preferably, the retarder is a composite retarder formed by mixing lignin calcium carbonate, citric acid and sodium fluosilicate.
Preferably, the rubber powder is prepared by grinding and sieving waste rubber.
Preferably, river sand passes through a sieve with the thickness of 1.25mm, the fineness modulus is 1.6-1.7, the mud content is less than 3%, and the water content is less than 5%.
The invention also provides a preparation method of the environment-friendly waterproof plastering gypsum, which comprises the following steps:
s1, preparing modified fluorgypsum: grinding the fluorine gypsum waste residue after industrial production into powder; transferring the fluorine gypsum waste residue powder into a muffle furnace, adding 1-1.5% of quicklime, 0.2-0.5% of inorganic salt and 10-20% of slag, and calcining at 100-120 ℃ for 1h in an alkaline environment;
s2, preparing modified nano silicon dioxide: adding 0.8-2.4 g of polymethylhydrosiloxane into 70-280mL of deionized water, simultaneously adding 0.005-O.O2mol of alkali, and stirring for 1-3 hours at room temperature; adding 70-280mL of ethanol into the newly prepared solution, and stirring for 3-6 hours; adding 4.8-16g of nano silicon dioxide into the solution, and stirring for 24-8 hours at 40-60 ℃; filtering, washing and drying to obtain hydrophobic nano silicon dioxide;
s3, preparing modified diatomite: heating diatomite in an oven to 102-120 ℃ for 2-6 hours to obtain modified diatomite with white color, whiteness of over 80, fineness of 200-600 meshes, pH value of 8-10 and bulk density of 0.36-0.48g/cm 3;
s4, weighing the modified fluorgypsum, the modified nano-silica, the rubber powder, the modified diatomite, the bentonite, the river sand and the water according to the weight ratio, and stirring until the materials are uniformly mixed; the stirring speed is 2000-3000 r/min;
s5, adding the rest of the water-retaining agent, the flavoring agent and the retarder into the mixture, and stirring until the mixture is uniformly mixed; stirring at 400-500r/min to obtain gypsum plaster slurry.
Preferably, the plastering gypsum slurry is subsequently extruded and air-dried, and the water content is controlled to be lower than 10%.
The technical scheme of the invention has the following beneficial technical effects:
the environment-friendly waterproof plastering gypsum adopts the fluorine gypsum waste residue as a main production raw material, realizes the reutilization of waste resources, and is more energy-saving and environment-friendly; the modified nano silicon dioxide is utilized, so that the corrosion resistance, the impact resistance, the heat resistance and the hydrophobicity of the plastering gypsum are improved, and the photocatalytic effect is favorable for energy conservation and environmental protection; the water retention performance of the plastering gypsum is enhanced through the modified diatomite, and deformation and falling off are reduced; in addition, the preparation process of the environment-friendly waterproof plastering gypsum is simple, and the production cost is effectively reduced by recycling waste resources.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Example 1
The invention provides an environment-friendly waterproof plastering gypsum which comprises 70 parts of modified fluorgypsum, 15 parts of a water-retaining agent, 10 parts of modified nano-silica, 10 parts of rubber powder, 30 parts of modified diatomite, 20 parts of bentonite, 1 part of a retarder, 30 parts of river sand, 10 parts of a flavoring agent and 200 parts of water.
In an alternative embodiment, the water retaining agent is methylcellulose.
In an alternative embodiment, the retarder is a composite retarder formed by mixing lignin calcium carbonate, citric acid and sodium fluosilicate.
In an alternative embodiment, the rubber powder is prepared by grinding and sieving waste rubber.
In an alternative embodiment, the river sand passes through a 1.25mm sieve, the fineness modulus is 1.6-1.7, the mud content is less than 3%, and the water content is less than 5%.
The invention also provides a preparation method of the environment-friendly waterproof plastering gypsum, which comprises the following steps:
s1, preparing modified fluorgypsum: grinding the fluorine gypsum waste residue after industrial production into powder; transferring the fluorine gypsum waste residue powder into a muffle furnace, adding 1-1.5% of quicklime, 0.2-0.5% of inorganic salt and 10-20% of slag, and calcining at 100-120 ℃ for 1h in an alkaline environment;
s2, preparing modified nano silicon dioxide: adding 0.8-2.4 g of polymethylhydrosiloxane into 70-280mL of deionized water, simultaneously adding 0.005-O.O2mol of alkali, and stirring for 1-3 hours at room temperature; adding 70-280mL of ethanol into the newly prepared solution, and stirring for 3-6 hours; adding 4.8-16g of nano silicon dioxide into the solution, and stirring for 24-8 hours at 40-60 ℃; filtering, washing and drying to obtain hydrophobic nano silicon dioxide;
s3, preparing modified diatomite: heating diatomite in an oven to 102-120 ℃ for 2-6 hours to obtain modified diatomite with white color, whiteness of over 80, fineness of 200-600 meshes, pH value of 8-10 and bulk density of 0.36-0.48g/cm 3;
s4, weighing the modified fluorgypsum, the modified nano-silica, the rubber powder, the modified diatomite, the bentonite, the river sand and the water according to the weight ratio, and stirring until the materials are uniformly mixed; the stirring speed is 2000-3000 r/min;
s5, adding the rest of the water-retaining agent, the flavoring agent and the retarder into the mixture, and stirring until the mixture is uniformly mixed; stirring at 400-500r/min to obtain gypsum plaster slurry.
In an alternative embodiment, the stucco gypsum slurry is subsequently extruded and air dried to a moisture content of less than 10%.
Example 2
The invention provides an environment-friendly waterproof plastering gypsum which comprises, by weight, 75 parts of modified fluorgypsum, 20 parts of a water-retaining agent, 15 parts of modified nano-silica, 15 parts of rubber powder, 35 parts of modified diatomite, 25 parts of bentonite, 1.5 parts of a retarder, 35 parts of river sand, 15 parts of a flavoring agent and 250 parts of water.
In an alternative embodiment, the water retaining agent is methylcellulose.
In an alternative embodiment, the retarder is a composite retarder formed by mixing lignin calcium carbonate, citric acid and sodium fluosilicate.
In an alternative embodiment, the rubber powder is prepared by grinding and sieving waste rubber.
In an alternative embodiment, the river sand passes through a 1.25mm sieve, the fineness modulus is 1.6-1.7, the mud content is less than 3%, and the water content is less than 5%.
The invention also provides a preparation method of the environment-friendly waterproof plastering gypsum, which comprises the following steps:
s1, preparing modified fluorgypsum: grinding the fluorine gypsum waste residue after industrial production into powder; transferring the fluorine gypsum waste residue powder into a muffle furnace, adding 1-1.5% of quicklime, 0.2-0.5% of inorganic salt and 10-20% of slag, and calcining at 100-120 ℃ for 1h in an alkaline environment;
s2, preparing modified nano silicon dioxide: adding 0.8-2.4 g of polymethylhydrosiloxane into 70-280mL of deionized water, simultaneously adding 0.005-O.O2mol of alkali, and stirring for 1-3 hours at room temperature; adding 70-280mL of ethanol into the newly prepared solution, and stirring for 3-6 hours; adding 4.8-16g of nano silicon dioxide into the solution, and stirring for 24-8 hours at 40-60 ℃; filtering, washing and drying to obtain hydrophobic nano silicon dioxide;
s3, preparing modified diatomite: heating diatomite in an oven to 102-120 ℃ for 2-6 hours to obtain modified diatomite with white color, whiteness of over 80, fineness of 200-600 meshes, pH value of 8-10 and bulk density of 0.36-0.48g/cm 3;
s4, weighing the modified fluorgypsum, the modified nano-silica, the rubber powder, the modified diatomite, the bentonite, the river sand and the water according to the weight ratio, and stirring until the materials are uniformly mixed; the stirring speed is 2000-3000 r/min;
s5, adding the rest of the water-retaining agent, the flavoring agent and the retarder into the mixture, and stirring until the mixture is uniformly mixed; stirring at 400-500r/min to obtain gypsum plaster slurry.
In an alternative embodiment, the stucco gypsum slurry is subsequently extruded and air dried to a moisture content of less than 10%.
Example 3
The invention provides an environment-friendly waterproof plastering gypsum which comprises, by weight, 80 parts of modified fluorgypsum, 25 parts of a water-retaining agent, 20 parts of modified nano-silica, 20 parts of rubber powder, 40 parts of modified diatomite, 30 parts of bentonite, 2 parts of a retarder, 40 parts of river sand, 20 parts of a flavoring agent and 300 parts of water.
In an alternative embodiment, the water retaining agent is methylcellulose.
In an alternative embodiment, the retarder is a composite retarder formed by mixing lignin calcium carbonate, citric acid and sodium fluosilicate.
In an alternative embodiment, the rubber powder is prepared by grinding and sieving waste rubber.
In an alternative embodiment, the river sand passes through a 1.25mm sieve, the fineness modulus is 1.6-1.7, the mud content is less than 3%, and the water content is less than 5%.
The invention also provides a preparation method of the environment-friendly waterproof plastering gypsum, which comprises the following steps:
s1, preparing modified fluorgypsum: grinding the fluorine gypsum waste residue after industrial production into powder; transferring the fluorine gypsum waste residue powder into a muffle furnace, adding 1-1.5% of quicklime, 0.2-0.5% of inorganic salt and 10-20% of slag, and calcining at 100-120 ℃ for 1h in an alkaline environment;
s2, preparing modified nano silicon dioxide: adding 0.8-2.4 g of polymethylhydrosiloxane into 70-280mL of deionized water, simultaneously adding 0.005-O.O2mol of alkali, and stirring for 1-3 hours at room temperature; adding 70-280mL of ethanol into the newly prepared solution, and stirring for 3-6 hours; adding 4.8-16g of nano silicon dioxide into the solution, and stirring for 24-8 hours at 40-60 ℃; filtering, washing and drying to obtain hydrophobic nano silicon dioxide;
s3, preparing modified diatomite: heating diatomite in an oven to 102-120 ℃ for 2-6 hours to obtain modified diatomite with white color, whiteness of over 80, fineness of 200-600 meshes, pH value of 8-10 and bulk density of 0.36-0.48g/cm 3;
s4, weighing the modified fluorgypsum, the modified nano-silica, the rubber powder, the modified diatomite, the bentonite, the river sand and the water according to the weight ratio, and stirring until the materials are uniformly mixed; the stirring speed is 2000-3000 r/min;
s5, adding the rest of the water-retaining agent, the flavoring agent and the retarder into the mixture, and stirring until the mixture is uniformly mixed; stirring at 400-500r/min to obtain gypsum plaster slurry.
In an alternative embodiment, the stucco gypsum slurry is subsequently extruded and air dried to a moisture content of less than 10%.
The environment-friendly waterproof plastering gypsum adopts the fluorine gypsum waste residue as a main production raw material, realizes the reutilization of waste resources, and is more energy-saving and environment-friendly; the modified nano silicon dioxide is utilized, so that the corrosion resistance, the impact resistance, the heat resistance and the hydrophobicity of the plastering gypsum are improved, and the photocatalytic effect is favorable for energy conservation and environmental protection; the water retention performance of the plastering gypsum is enhanced through the modified diatomite, and deformation and falling off are reduced; in addition, the preparation process of the environment-friendly waterproof plastering gypsum is simple, and the production cost is effectively reduced by recycling waste resources.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims (10)

1. An environment-friendly waterproof plastering gypsum is characterized by comprising, by weight, 70-80 parts of modified fluorgypsum, 15-25 parts of a water-retaining agent, 10-20 parts of modified nano silicon dioxide, 10-20 parts of rubber powder, 30-40 parts of modified diatomite, 20-30 parts of bentonite, 1-2 parts of a retarder, 30-40 parts of river sand, 10-20 parts of a flavoring agent and 200-300 parts of water.
2. The environment-friendly waterproof plastering gypsum of claim 1, which comprises, by weight, 70 parts of modified fluorgypsum, 15 parts of a water-retaining agent, 10 parts of modified nano-silica, 10 parts of rubber powder, 30 parts of modified diatomite, 20 parts of bentonite, 1 part of retarder, 30 parts of river sand, 10 parts of a flavoring agent and 200 parts of water.
3. The environment-friendly waterproof plastering gypsum of claim 1, which comprises 80 parts of modified fluorgypsum, 25 parts of water-retaining agent, 20 parts of modified nano-silica, 20 parts of rubber powder, 40 parts of modified diatomite, 30 parts of bentonite, 2 parts of retarder, 40 parts of river sand, 20 parts of flavoring agent and 300 parts of water according to weight ratio.
4. The environment-friendly waterproof plastering gypsum of claim 1, which comprises 75 parts by weight of modified fluorgypsum, 20 parts by weight of a water-retaining agent, 15 parts by weight of modified nano-silica, 15 parts by weight of rubber powder, 35 parts by weight of modified diatomite, 25 parts by weight of bentonite, 1.5 parts by weight of a retarder, 35 parts by weight of river sand, 15 parts by weight of a flavoring agent and 250 parts by weight of water.
5. The environmentally friendly waterproof stucco gypsum of claim 1, wherein the water retention agent is methyl cellulose.
6. The environmentally friendly waterproof render gypsum of claim 1, wherein the retarder is a composite retarder formed by mixing lignin calcium carbonate, citric acid and sodium fluorosilicate.
7. The environmentally friendly waterproof stucco gypsum of claim 1, wherein the rubber powder is prepared by grinding and sieving waste rubber.
8. The environment-friendly waterproof plastering gypsum of claim 1, wherein the river sand passes through a sieve of 1.25mm, the fineness modulus is 1.6-1.7, the mud content is less than 3%, and the water content is less than 5%.
9. A method for preparing the environmentally friendly waterproof stucco gypsum according to any of claims 1 to 8, wherein the method comprises the steps of:
s1, preparing modified fluorgypsum: grinding the fluorine gypsum waste residue after industrial production into powder; transferring the fluorine gypsum waste residue powder into a muffle furnace, adding 1-1.5% of quicklime, 0.2-0.5% of inorganic salt and 10-20% of slag, and calcining at 100-120 ℃ for 1h in an alkaline environment;
s2, preparing modified nano silicon dioxide: adding 0.8-2.4 g of polymethylhydrosiloxane into 70-280mL of deionized water, simultaneously adding 0.005-O.O2mol of alkali, and stirring for 1-3 hours at room temperature; adding 70-280mL of ethanol into the newly prepared solution, and stirring for 3-6 hours; adding 4.8-16g of nano silicon dioxide into the solution, and stirring for 24-8 hours at 40-60 ℃; filtering, washing and drying to obtain hydrophobic nano silicon dioxide;
s3, preparing modified diatomite: heating diatomite in an oven to 102-120 ℃ for 2-6 hours to obtain modified diatomite with white color, whiteness of over 80, fineness of 200-600 meshes, pH value of 8-10 and bulk density of 0.36-0.48g/cm 3;
s4, weighing the modified fluorgypsum, the modified nano-silica, the rubber powder, the modified diatomite, the bentonite, the river sand and the water according to the weight ratio, and stirring until the materials are uniformly mixed; the stirring speed is 2000-3000 r/min;
s5, adding the rest of the water-retaining agent, the flavoring agent and the retarder into the mixture, and stirring until the mixture is uniformly mixed; stirring at 400-500r/min to obtain gypsum plaster slurry.
10. The method for preparing environmentally friendly waterproof stucco gypsum of claim 9, wherein the stucco gypsum slurry is subsequently extruded and air dried to a moisture content of less than 10%.
CN202011371875.4A 2020-11-30 2020-11-30 Environment-friendly waterproof plastering gypsum and preparation method thereof Withdrawn CN112321257A (en)

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CN202011371875.4A CN112321257A (en) 2020-11-30 2020-11-30 Environment-friendly waterproof plastering gypsum and preparation method thereof

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Application Number Priority Date Filing Date Title
CN202011371875.4A CN112321257A (en) 2020-11-30 2020-11-30 Environment-friendly waterproof plastering gypsum and preparation method thereof

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CN112321257A true CN112321257A (en) 2021-02-05

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