CN111606675B - Method for improving high chloride ion content of plastering gypsum and plastering gypsum - Google Patents
Method for improving high chloride ion content of plastering gypsum and plastering gypsum Download PDFInfo
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- CN111606675B CN111606675B CN201910540925.8A CN201910540925A CN111606675B CN 111606675 B CN111606675 B CN 111606675B CN 201910540925 A CN201910540925 A CN 201910540925A CN 111606675 B CN111606675 B CN 111606675B
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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
- C04B28/144—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 the synthetic calcium sulfate being a flue gas desulfurization product
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a method for improving high chloride ion content of plastering gypsum and plastering gypsum, which comprises the following raw materials in parts by weight: 65-75 parts of gypsum clinker, 8-12 parts of vitrified micro bubbles, 10-15 parts of zeolite, 5-10 parts of hydrated lime, 0.25-0.30 part of water-retaining agent, 0.05-0.08 part of pregelatinized starch, 0.003-0.005 part of air-entraining agent, 0.05-0.08 part of retarder, 0.2-0.3 part of thixotropic lubricant and 0.1-0.3 part of rubber powder. The preparation method of the plastering gypsum comprises the steps of mixing and stirring the raw materials uniformly; according to the plastering gypsum provided by the invention, through the optimization of the mixture ratio of the raw materials, chloride ions in the raw material gypsum are adsorbed and cured, and the migration of the chloride ions in the hardening slurry of the plastering gypsum can be effectively prevented. The calcium chloride formed by chloride ions and calcium ions is avoided, and the phenomena of wetting, yellowing and the like of plastering gypsum are avoided.
Description
Technical Field
The invention relates to the technical field of gypsum mortar, in particular to a method for improving high chloride ion content of plastering gypsum and plastering gypsum.
Background
The gypsum plastering material is a leveling or finishing material taking gypsum as a base material, and compared with a cement plastering material, the gypsum plastering material has low volume weight which is only half of that of the traditional cement plastering material, and can effectively reduce the load of a building; the gypsum plaster material can be crushed again together with the gypsum building blocks after being discarded, has gelling property after being calcined at low temperature, and can be repeatedly used; in addition, the gypsum can regulate and control humidity and has good flame retardance, sound absorption and impact resistance. Therefore, gypsum plastering materials become new materials which are intensively popularized in China.
At present, the source of the plastering gypsum is generally industrial by-product gypsum, and especially the desulfurized gypsum is the most common. Chloride ions are common impurity ions in the desulfurized gypsum, and have important influence on the plastering gypsum prepared by taking the desulfurized gypsum as a raw material. The calcium chloride is very easy to absorb water and damp, and the plastering gypsum has the phenomena of moisture regain, yellowing and the like. Therefore, it is necessary to reduce the content of free chloride ions in plastering gypsum.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
The invention aims to provide a method for improving the high chloride ion content of plastering gypsum so as to improve the later-stage service performance of the plastering gypsum.
According to JC/T2074-2011 flue gas desulfurization gypsum, the desulfurization gypsum meets the technical requirement regulation of more than three levels of desulfurization gypsum: the content of chloride ions is less than or equal to 400 mg/kg.
The application provides a method for improving the high chloride ion content of plastering gypsum and plastering gypsum, wherein the plastering gypsum comprises the following raw materials in parts by weight: 65-75 parts of gypsum clinker, 8-12 parts of vitrified micro bubbles, 10-15 parts of zeolite, 5-10 parts of hydrated lime, 0.25-0.30 part of water-retaining agent, 0.05-0.08 part of pregelatinized starch, 0.003-0.005 part of air-entraining agent, 0.05-0.08 part of retarder, 0.2-0.3 part of thixotropic lubricant and 0.1-0.3 part of rubber powder; optionally, the raw material of the plastering gypsum consists of the above materials.
The gypsum clinker is selected from one or more of high-chlorine desulfurized gypsum, high-chlorine phosphogypsum and high-chlorine fluorine gypsum;
the content of chloride ions in the high-chlorine gypsum is 500-1000 mg/kg.
In the plastering gypsum provided by the invention, the zeolite is modified zeolite, and the modified zeolite is one or more selected from analcime, mordenite and clinoptilolite which are subjected to high-temperature roasting; the high-temperature roasting temperature is 180-220 ℃, and the roasting time is 4-6 h.
In the plastering gypsum provided by the invention, the zeolite is modified zeolite, and the particle size of the modified zeolite is 40-60 meshes; the specific surface area of the modified zeolite is 400-800m 2 /g。
The plastering stone provided by the inventionIn the paste, the bulk density of the vitrified micro bubbles is 80-120kg/cm 3 (ii) a The grain diameter is 70-90 meshes.
In the plastering gypsum provided by the invention, the particle size of the hydrated lime is 300-400 meshes.
In the plastering gypsum provided by the invention, the water retaining agent is selected from water retaining agents selected from hydroxyethyl cellulose, hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether.
In the plastering gypsum provided by the invention, the air-entraining agent is any one or more selected from rosin resin air-entraining agents, alkyl sulfate air-entraining agents, alkyl benzene sulfonate air-entraining agents and fatty alcohol sulfonate air-entraining agents.
In the plastering gypsum provided by the invention, the retarder is selected from one or more of the retarders selected from citric acid, sodium citrate, sodium hexametaphosphate, borax, lignosulfonate, sodium carboxymethylcellulose, phosphoric acid and protein retarders;
in the plastering gypsum provided by the invention, the protein retarder is selected from a bone glue protein retarder and a protein gypsum retarder formed by calcium-calcified degraded polyamide.
In the plastering gypsum provided by the invention, the thixotropic lubricant is a silicate mineral material.
In the plastering gypsum provided by the invention, the rubber powder is selected from one or more of vinyl acetate/ethylene copolymer and ethylene/acrylic acid branched copolymer.
In the plastering gypsum provided by the invention, the preparation method of the plastering gypsum comprises the step of uniformly mixing all the raw materials.
The invention mainly adds the zeolite powder and the hydrated lime into the plastering gypsum to reduce the content of water-soluble chloride ions in the plastering gypsum slurry. Firstly, the zeolite powder has a frame structure, a plurality of cavities are arranged in the crystal, and the volume of the pore canal accounts for about 50% of the volume of the zeolite sphere, so that the zeolite has stronger adsorption capacity and can adsorb chloride ions in the material; secondly, the zeolite powder contains a certain amount of active silicon dioxide and silicon trioxide which can react with the doped calcium hydroxide to generate a reticular C-S-H gel, the C-S-H gel is dispersed and distributed on the surface of the gypsum crystal to improve the strength of the plastering gypsum, and meanwhile, the C-S-H gel has a large internal specific surface area and strong adsorption and solidification capacity on chloride ions and can effectively prevent the chloride ions from migrating in the hardening slurry of the plastering gypsum.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the application may be realized and attained by the instrumentalities and methods described in the specification and claims.
Detailed Description
The following examples are intended to illustrate and explain the present invention in more detail and to make the contents of the invention more visually understandable, but the present invention is not limited to the following examples.
The embodiment of the invention provides plastering gypsum with high chloride ion content, which comprises the following raw materials in parts by weight: 65-75 parts of gypsum clinker, 8-12 parts of vitrified micro bubbles, 10-15 parts of zeolite, 5-10 parts of hydrated lime, 0.25-0.30 part of water-retaining agent, 0.05-0.08 part of pregelatinized starch, 0.003-0.005 part of air entraining agent, 0.05-0.08 part of retarder, 0.2-0.3 part of thixotropic lubricant and 0.1-0.3 part of rubber powder; optionally, the raw material of the plastering gypsum consists of the above materials.
The gypsum clinker is selected from one or more of high-chlorine desulfurized gypsum, high-chlorine phosphogypsum and high-chlorine fluorine gypsum;
the content of chloride ions in the high-chlorine gypsum is 500-1000 mg/kg.
In an embodiment of the present invention, the zeolite is a modified zeolite, and the modified zeolite is one or more selected from the group consisting of analcime, mordenite, and clinoptilolite which have been subjected to high-temperature calcination; the high-temperature roasting temperature is 180-220 ℃, and the roasting time is 4-6 h.
In the embodiment of the invention, the zeolite is modified zeolite, and the particle size of the modified zeolite is 40-60 meshes; the specific surface area of the modified zeolite is 400-800m 2 /g。
In the embodiment of the invention, the glassThe bulk density of the microbeads is 80-120kg/cm 3 (ii) a The grain diameter is 70-90 meshes.
In the embodiment of the invention, the particle size of the hydrated lime is 300-400 meshes.
In an embodiment of the present invention, the water retaining agent is selected from water retaining agents selected from hydroxyethyl cellulose, hydroxyethyl methyl cellulose ether, hydroxypropyl methyl cellulose ether.
In the embodiment of the present invention, the air-entraining agent is selected from any one or more of rosin resin air-entraining agents, alkyl sulfate air-entraining agents, alkyl benzene sulfonate air-entraining agents, and fatty alcohol sulfonate air-entraining agents.
In the embodiment of the invention, the retarder is selected from one or more of citric acid, sodium citrate, sodium hexametaphosphate, borax, lignosulfonate, sodium carboxymethyl cellulose, phosphoric acid and protein retarder;
in the embodiment of the invention, the protein retarder is selected from a bone glue protein retarder and a protein gypsum retarder formed by calcium-calcified degraded polyamide.
In an embodiment of the invention, the thixotropic lubricant is a silicate mineral material.
In the embodiment of the invention, the rubber powder is selected from one or more of vinyl acetate/ethylene copolymer and ethylene/acrylic acid branched copolymer.
In the embodiment of the invention, the preparation method of the plastering gypsum is that all raw materials are uniformly mixed.
In the embodiment of the invention, the specific step of modifying the zeolite is to roast the zeolite at the high temperature of 180 ℃ for 6 hours to obtain the modified clinoptilolite with the granularity of 60 meshes and the specific surface area of 780m 2 (ii)/g; the modified analcime has particle size of 60 mesh and specific surface area of 600m 2 (ii)/g; the modified mordenite has a particle size of 40 meshes and a specific surface area of 450m 2 (ii)/g; the pregelatinized starch is purchased from red source chemical company, ltd;
example 1:
the content of chloride ions in the desulfurized gypsum clinker raw material of the plastering gypsum prepared by the embodiment is 600 mg/kg; the above-mentionedThe plaster comprises the following raw materials: the vitrified micro bubbles have the grain diameter of 70 meshes and the bulk density of 85kg/m 3 The commercially available material of (1); the zeolite is modified clinoptilolite; the particle size of the hydrated lime is a commercial material with 300 meshes; the water-retaining agent is hydroxyethyl methyl cellulose ether which is produced by the Dow chemical and has the model number of Xtra 40-50; the air entraining agent is an AE-2 type air entraining agent produced by Kelaien; the retarder is a protein retarder with the model P produced by Wacker chemistry; the thixotropic lubricant is 987 thixotropic lubricant produced by Pico chemistry; the rubber powder is a 5010N vinyl acetate-ethylene copolymer produced by Wacker chemistry;
taking 65 parts by weight of desulfurized gypsum clinker, 12 parts by weight of vitrified micro bubbles, 15 parts by weight of zeolite powder, 8 parts by weight of hydrated lime, 0.30 part by weight of water-retaining agent and 0.05 part by weight of pregelatinized starch; 0.003 weight part of air entraining agent, 0.05 weight part of retarder, 0.3 weight part of thixotropic lubricant and 0.3 weight part of rubber powder, and the plaster with low chloride ion content is prepared by uniformly mixing and stirring.
Example 2:
the content of chloride ions in the raw material phosphogypsum clinker of the plastering gypsum prepared by the embodiment is 800 mg/kg; the plastering gypsum comprises the following raw materials: the vitrified micro bubbles have the grain diameter of 80 meshes and the bulk density of 100kg/m 3 The commercially available material of (1); the zeolite is modified analcime; the particle size of the hydrated lime is 325 meshes; the water retaining agent is a hydroxypropyl methyl cellulose ether water retaining agent which is produced by Markem and has the model number of 100000 s; the air entraining agent is an AE-200 type air entraining agent produced by bamboo oil; the retarder is a commercially available citric acid retarder; the thixotropic lubricant is LBCB-1 thixotropic lubricant produced by Lanbo chemical technology limited company; the rubber powder is a vinyl acetate-ethylene copolymer which is produced by Wake chemical and has the model number of 5544N;
taking 70 parts of phosphogypsum clinker, 8 parts of vitrified micro bubbles, 12 parts of zeolite powder, 10 parts of hydrated lime, 0.27 part of water-retaining agent and 0.07 part of pregelatinized starch; 0.004 weight portion of air entraining agent, 0.06 weight portion of retarder, 0.2 weight portion of thixotropic lubricant and 0.2 weight portion of rubber powder, and the components are mixed and stirred uniformly to prepare the plastering gypsum with low chloride ion content.
Example 3:
the content of chloride ions in the raw material fluorgypsum clinker of the plastering gypsum prepared by the embodiment is 920 mg/kg; the plastering gypsum comprises the following raw materials: the vitrified micro bubbles have the particle size of 90 meshes and the bulk density of 120kg/m 3 The commercially available materials of (1); the zeolite is modified mordenite; the particle size of the hydrated lime is 400 meshes; the water retaining agent is a 75000s hydroxypropyl methyl cellulose ether water retaining agent produced by Markov company; the air entraining agent is an AE-200 type air entraining agent produced by bamboo oil; the retarder is a protein retarder which is produced by Wacker chemistry and has the model of PE; the thixotropic lubricant is 987 thixotropic lubricant produced by Pico chemistry; the rubber powder is 5044N rubber powder produced by Wake chemical industry;
taking 75 parts by weight of gypsum, 9 parts by weight of vitrified micro bubbles, 10 parts by weight of zeolite powder and hydrated lime: 6 parts by weight, 0.25 part by weight of water-retaining agent and 0.08 part by weight of pregelatinized starch; 0.005 part of air entraining agent, 0.08 part of retarder, 0.3 part of thixotropic lubricant and 0.1 part of rubber powder by weight are mixed and stirred uniformly to prepare the plastering gypsum with low chloride ion content.
Comparative example 1
The plastering gypsum prepared by the comparative example is not added with zeolite materials, and the sources of other raw materials are uniform, and are the same as those in example 1;
taking 65 parts by weight of desulfurized gypsum clinker (the content of chloride ions is 600mg/kg), 12 parts by weight of vitrified micro bubbles, 15 parts by weight of zeolite powder and hydrated lime: 8 parts by weight, 0.30 part by weight of water-retaining agent and 0.05 part by weight of pregelatinized starch; 0.003 weight part of air entraining agent, 0.05 weight part of retarder, 0.3 weight part of thixotropic lubricant and 0.3 weight part of rubber powder, and the components are mixed and stirred uniformly to prepare the plastering gypsum.
Comparative example 2
In the plastering gypsum prepared by the comparative example, the zeolite is replaced by fly ash with the granularity of 120 meshes, and the rest raw materials are uniformly sourced as in example 1;
taking 65 parts by weight of desulfurized gypsum clinker (the content of chloride ions is 600mg/kg), 12 parts by weight of vitrified micro bubbles, 15 parts by weight of fly ash and hydrated lime: 8 parts by weight, 0.30 part by weight of water-retaining agent and 0.05 part by weight of pregelatinized starch; 0.003 weight part of air entraining agent, 0.05 weight part of retarder, 0.3 weight part of thixotropic lubricant and 0.3 weight part of rubber powder, and the components are mixed and stirred uniformly to prepare the plastering gypsum.
Comparative example 3
The plastering gypsum prepared by the comparative example has the advantages that the zeolite is not modified and clinoptilolite, and other raw materials are uniformly sourced, and the plastering gypsum prepared by the comparative example is the same as that prepared in example 1;
taking 65 parts by weight of desulfurized gypsum clinker (the content of chloride ions is 600mg/kg), 12 parts by weight of vitrified micro bubbles, 15 parts by weight of zeolite and hydrated lime: 8 parts by weight, 0.30 part by weight of water-retaining agent and 0.05 part by weight of pregelatinized starch; 0.003 weight part of air entraining agent, 0.05 weight part of retarder, 0.3 weight part of thixotropic lubricant and 0.3 weight part of rubber powder, and the components are mixed and stirred uniformly to prepare the plastering gypsum.
Test example 1
The above examples and comparative examples were tested according to the national standard GB/T28627-2012 plastering Gypsum, with the following results:
TABLE 1 Performance test
As can be seen from the above table, the water retention and strength of the plastering gypsum prepared in examples 1-3 of the present invention are superior to those of the comparative example and the commercially available plastering gypsum, which indicates that the plastering gypsum prepared by the present invention has better water retention and is not easy to get damp in the later period. In addition, the plastering gypsum prepared by the embodiment of the invention has no yellowing phenomenon in the simulated use process, and the comparative example and the commercial plastering gypsum have yellowing to a certain extent, which shows that the plastering gypsum prepared by the invention has better use performance.
Although the embodiments disclosed in the present application are described above, the descriptions are only for the convenience of understanding the present application, and are not intended to limit the present application. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims.
Claims (7)
1. The plastering gypsum comprises the following raw materials in parts by weight: 65-75 parts of gypsum clinker, 8-12 parts of vitrified micro bubbles, 10-15 parts of zeolite, 5-10 parts of hydrated lime, 0.25-0.30 part of water-retaining agent, 0.05-0.08 part of pregelatinized starch, 0.003-0.005 part of air entraining agent, 0.05-0.08 part of retarder, 0.2-0.3 part of thixotropic lubricant and 0.1-0.3 part of rubber powder;
the gypsum clinker is selected from one or more of high-chlorine desulfurized gypsum, high-chlorine phosphogypsum and high-chlorine fluorine gypsum;
the zeolite is modified zeolite, and the modified zeolite is one or more selected from square zeolite, mordenite and clinoptilolite which are subjected to high-temperature roasting; the high-temperature roasting temperature is 180 ℃ and 220 ℃, and the roasting time is 4-6 h;
the content of chloride ions in the high-chlorine gypsum is 500-1000 mg/kg;
the zeolite is modified zeolite, and the particle size of the modified zeolite is 40-60 meshes; the specific surface area of the modified zeolite is 400-800m 2 /g。
2. The plastering gypsum of claim 1, wherein the bulk density of said vitrified microbeads is 80-120kg/cm 3 (ii) a The grain diameter is 70-90 meshes.
3. A plastering gypsum according to claim 2, wherein the hydrated lime has a particle size of 300-400 mesh.
4. The render gypsum of claim 1, wherein said water retaining agent is selected from the group consisting of water retaining agents selected from the group consisting of hydroxyethyl cellulose, hydroxyethyl methyl cellulose ether, hydroxypropyl methyl cellulose ether.
5. The plastering gypsum of claim 1, wherein the air-entraining agent is selected from one or more of rosin resin air-entraining agents, alkyl sulfate air-entraining agents, alkyl benzene sulfonate air-entraining agents, and fatty alcohol sulfonate air-entraining agents.
6. The render gypsum of claim 1, wherein said set retarder is selected from one or more of the group consisting of set retarders selected from the group consisting of citric acid, sodium citrate, sodium hexametaphosphate, borax, lignosulfonate, sodium carboxymethylcellulose, phosphoric acid, and protein-based set retarders;
the protein retarder is selected from a bone glue protein retarder and a protein gypsum retarder formed by calcium calcification of degraded polyamide;
the thixotropic lubricant is a silicate mineral material.
7. Plastering gypsum according to claim 1, wherein the glue powder is selected from one or more of vinyl acetate/ethylene copolymer and ethylene/acrylic acid graft copolymer.
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| CN112341022A (en) * | 2020-11-24 | 2021-02-09 | 浙江壮硕建材有限公司 | Bottom layer plastering gypsum for regenerative building and preparation method thereof |
| CN112341023A (en) * | 2020-11-24 | 2021-02-09 | 浙江壮硕建材有限公司 | Surface plastering gypsum for regenerative building and preparation method thereof |
| CN113213808B (en) * | 2021-06-02 | 2022-05-17 | 广东龙湖科技股份有限公司 | Additive for plastering gypsum, preparation method of additive and plastering gypsum |
| CN113829694A (en) * | 2021-09-10 | 2021-12-24 | 北新集团建材股份有限公司 | Paper-surface gypsum board and preparation method thereof |
| CN113956009A (en) * | 2021-11-11 | 2022-01-21 | 北新集团建材股份有限公司 | Gypsum-based mortar and preparation method thereof |
| CN113968720A (en) * | 2021-11-11 | 2022-01-25 | 北新集团建材股份有限公司 | Gypsum-based dry-mixed mortar and preparation method thereof |
| CN113979665B (en) * | 2021-11-29 | 2022-06-14 | 武汉理工大学 | Functional additive for treating high-chloride-ion-content desulfurized gypsum, and preparation method and application thereof |
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| CN101121589A (en) * | 2007-07-10 | 2008-02-13 | 武汉理工大学 | Gypsum-base self-adjusting wet inner wall render material and preparation method thereof |
| CN108129051A (en) * | 2017-12-29 | 2018-06-08 | 江苏苏博特新材料股份有限公司 | A kind of long-term efficiently concrete admixture of curing of chloride ion and application |
| CN109250944A (en) * | 2018-11-12 | 2019-01-22 | 武汉理工大学 | A kind of zeolite-loaded type chloride ion curing agent and its preparation method and application |
| CN109836112A (en) * | 2019-02-27 | 2019-06-04 | 河北科技大学 | A kind of inner wall of building lightweight plastering gupsum |
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