CN111606676A - High-water-retention gypsum self-leveling material and preparation method thereof - Google Patents
High-water-retention gypsum self-leveling material and preparation method thereof Download PDFInfo
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- CN111606676A CN111606676A CN201910540931.3A CN201910540931A CN111606676A CN 111606676 A CN111606676 A CN 111606676A CN 201910540931 A CN201910540931 A CN 201910540931A CN 111606676 A CN111606676 A CN 111606676A
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- gypsum
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- leveling material
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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
- C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
- C04B28/146—Calcium sulfate hemi-hydrate with a specific crystal form alpha-hemihydrate
-
- 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
- C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
- C04B28/147—Calcium sulfate hemi-hydrate with a specific crystal form beta-hemihydrate
-
- 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
- C04B2111/00008—Obtaining or using nanotechnology related materials
-
- 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
Abstract
The invention provides a gypsum self-leveling material with high water retention and a preparation method thereof, wherein the raw material of the gypsum self-leveling material comprises nano superfine calcium carbonate, the particle size of the nano superfine calcium carbonate is 0.02-0.1 mu m, and optionally, the gypsum self-leveling mortar comprises the following raw materials: gypsum clinker, sand, heavy calcium carbonate, cement, nano superfine calcium carbonate, rubber powder, a water reducing agent, a water retaining agent, a retarder and a defoaming agent. When the gypsum self-leveling material is used for preparing gypsum self-leveling mortar, the weight ratio of the gypsum self-leveling mortar to water is 1: 0.23-0.28; the self-leveling mortar material provided by the invention endows the mortar with good flexibility, so that a mortar system is more stable, and the fluidity and the construction smoothness of the mortar in the stirring process are improved. In addition, the water in the mortar is not easy to lose and is gradually released in a long period of time, so that the mortar has good water retention and workability.
Description
Technical Field
The application relates to the technical field of building materials and mortar, in particular to a high-water-retention gypsum self-leveling material and a preparation method thereof.
Background
The traditional artificial terrace construction is to perform manual leveling after chiseling the concrete ground or to use cement self-leveling mortar for leveling. Manual leveling has high labor cost and low construction efficiency; the production energy consumption of the cement self-leveling mortar is high, the weight and the rigidity of the mortar are large, the load of a building is large, the comfort is poor, and the mortar is easy to crack.
The gypsum self-leveling mortar is a novel mortar product in China at present, is prepared by compounding gypsum serving as a base material with a filler, an aggregate and an additive, has good fluidity, dimensional stability and comfortableness, can overcome the defects of cement mortar, and is the best choice for leveling buildings.
The water retention of gypsum self-leveling mortar is an important performance index of the mortar, the mortar has poor water retention, the mortar can generate bleeding phenomenon, and the mortar can generate layering after being stirred by adding water, so that the mortar has the consequences of poor cohesiveness, poor operability and the like; due to the air hardening property of the gypsum, bleeding has great influence on the strength of the mortar, the mortar bleeds, the strength of the dried mortar is low, and the phenomena of dusting and sand falling are easy to occur. Therefore, the prevention of bleeding of the gypsum self-leveling mortar is one of the key important areas for the formula development of the gypsum mortar.
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 provides a high-water-retention gypsum self-leveling material and a preparation method thereof, wherein the gypsum self-leveling mortar comprises the following raw materials: nano superfine calcium carbonate;
in this application, nanometer superfine calcium carbonate has the steric hindrance effect, can prevent the mortar bleeding phenomenon, improves the water retention of mortar.
In the gypsum self-leveling material with high water retention, the particle size of the nano superfine calcium carbonate is 0.02-0.1 μm.
In the high water retention gypsum self-leveling material provided by the invention, the raw materials of the gypsum self-leveling material comprise the following components in parts by weight: 40-50 parts of gypsum clinker, 30-40 parts of sand, 8-10 parts of heavy calcium, 5-8 parts of cement, 5-10 parts of nano superfine calcium carbonate, 1-2 parts of rubber powder, 0.08-0.15 part of water reducing agent, 0.02-0.05 part of water retaining agent, 0.008-0.012 part of retarder and 0.04-0.07 part of defoaming agent.
Optionally, the raw materials of the gypsum self-leveling material comprise gypsum clinker, sand, heavy calcium carbonate, cement, nano superfine calcium carbonate, rubber powder, a water reducing agent, a water retaining agent, a retarder and a defoaming agent.
In the high-water-retention gypsum self-leveling material provided by the invention, the gypsum is one or two of alpha crystal form hemihydrate gypsum and beta crystal form hemihydrate gypsum.
In the gypsum self-leveling material with high water retention, the sand is one or two of ore sand and river sand;
in the high-water-retention gypsum self-leveling material provided by the invention, the grading range of the sand is 40-70 meshes of sand, and 70-140 meshes of sand is 1 (1-3).
In the high-water-retention gypsum self-leveling material provided by the invention, the fineness of the coarse whiting is 200-400 meshes.
In the gypsum self-leveling material with high water retention provided by the invention, the cement is one or two of ordinary portland cement or slag portland cement,
in the gypsum self-leveling material with high water retention, the cement strength grade is 32.5-52.5.
In the gypsum self-leveling material with high water retention, the rubber powder is selected from one or more of vinyl acetate-ethylene copolymer and ethylene-acrylic acid branched copolymer.
In the high water retention gypsum self-leveling material provided by the invention, the water reducing agent is selected from one or more of polycarboxylic acid water reducing agent, benzene sulfonate water reducing agent, lignosulfonate water reducing agent, naphthalene water reducing agent and melamine water reducing agent.
In the gypsum self-leveling material with high water retention provided by the invention, the water retention agent is selected from cellulose or an etherate thereof.
In the high water retention gypsum self-leveling material provided by the invention, the retarder is selected from one or more of citric acid, sodium citrate, sodium hexametaphosphate, borax, lignosulfonate, sodium carboxymethylcellulose, hydroxyethyl cellulose, phosphoric acid and protein retarder;
the protein retarder is selected from a bone glue protein retarder and a protein gypsum retarder formed by calcium calcification of degraded polyamide.
In the gypsum self-leveling material with high water retention, the defoaming agent is one or two of polyether defoaming agent and high-carbon alcohol fatty acid ester compound defoaming agent.
In the high-water-retention gypsum self-leveling material provided by the invention, when the gypsum self-leveling material is prepared into gypsum self-leveling mortar, the weight ratio of the gypsum self-leveling material to water is 1: 0.23-0.28.
The preparation method of the gypsum self-leveling material with high water retention provided by the invention comprises the steps of weighing the raw materials in proportion and uniformly mixing in a mixer.
The gypsum self-leveling material with high water retention, provided by the invention, endows the mortar with good flexibility through the synergistic effect of the components of the raw materials, enables a mortar system to be more stable, and improves the fluidity of the mortar in the stirring process and the smoothness of construction. In addition, the water in the mortar is not easy to lose and is gradually released in a long period of time, so that the mortar has good water retention and workability.
In addition, the self-leveling mortar provided by the invention can adjust the setting time of the mortar through adjusting components, and the construction property of the mortar is ensured.
The self-leveling mortar provided by the invention can be prepared by adding cement, heavy calcium carbonate and nano superfine calcium carbonate into gypsum self-leveling mortar to adjust the pH value of the self-leveling mortar, and is beneficial to full play of the performances of all components.
On the other hand, nanometer ultrafine calcium carbonate with a steric hindrance effect is added into the self-leveling mortar, and the suspension property of powder in the slurry is improved through the synergistic effect of the ultrafine nanometer calcium carbonate and other additives, so that the bleeding phenomenon of the slurry is further prevented;
the self-leveling material is simple in preparation method, the mortar using method and the construction process are simple, and when the self-leveling material is used, 23% -28% of water is added into the prepared self-leveling material according to the weight ratio, the self-leveling material is mixed into mortar with fluidity by adopting a stirrer or manually, and the mortar is poured on the ground.
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
Hereinafter, embodiments of the present application will be described in detail to make objects, technical solutions and advantages of the present application more apparent. It should be noted that, in the present embodiment, the features may be arbitrarily combined with each other without conflict.
The embodiment of the invention partially provides a high-water-retention gypsum self-leveling material, which comprises the following raw materials: nano superfine calcium carbonate;
in the embodiment of the invention, in the high water retention gypsum self-leveling material provided by the invention, the particle size of the nanometer ultrafine calcium carbonate is 0.02-0.1 μm.
In the embodiment of the invention, the raw materials of the gypsum self-leveling material comprise the following components in parts by weight: 40-50 parts of gypsum clinker, 30-40 parts of sand, 8-10 parts of heavy calcium, 5-8 parts of cement, 5-10 parts of nano superfine calcium carbonate, 1-2 parts of rubber powder, 0.08-0.15 part of water reducing agent, 0.02-0.05 part of water retaining agent, 0.008-0.012 part of retarder and 0.04-0.07 part of defoaming agent.
Optionally, the raw materials of the gypsum self-leveling material comprise gypsum clinker, sand, heavy calcium carbonate, cement, nano superfine calcium carbonate, rubber powder, a water reducing agent, a water retaining agent, a retarder and a defoaming agent.
In the embodiment of the invention, the gypsum is one or two of alpha crystal form hemihydrate gypsum and beta crystal form hemihydrate gypsum.
In the embodiment of the invention, the sand is one or two of ore sand and river sand;
in the embodiment of the invention, the grading range of the sand is 40-70 meshes of sand, and 70-140 meshes of sand are 1 (1-3).
In the embodiment of the invention, the fineness of the coarse whiting is 200-400 meshes.
In the embodiment of the invention, the cement is one or two of ordinary portland cement or slag portland cement,
in the embodiment of the invention, the cement strength grade is 32.5# -52.5 #.
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 water reducing agent is selected from one or more of a polycarboxylate water reducing agent, a benzene sulfonate water reducing agent, a lignosulfonate water reducing agent, a naphthalene water reducing agent and a melamine water reducing agent.
In the embodiment of the invention, the water retaining agent is selected from cellulose or etherified substances thereof.
In an embodiment of the invention, the retarder is selected from one or more of citric acid, sodium citrate, sodium hexametaphosphate, borax, lignosulfonate, sodium carboxymethylcellulose, hydroxyethyl cellulose, phosphoric acid and protein retarder;
the protein retarder is selected from a bone glue protein retarder and a protein gypsum retarder formed by calcium calcification of degraded polyamide.
In the embodiment of the invention, the defoaming agent is one or two of polyether defoaming agent and high-carbon alcohol fatty acid ester compound defoaming agent.
In the embodiment of the invention, when the gypsum self-leveling material is prepared into the gypsum self-leveling material, the weight ratio of the gypsum self-leveling material to water is 1: 0.23-0.28.
The preparation method of the gypsum self-leveling material with high water retention provided by the invention comprises the steps of weighing the raw materials in proportion and uniformly mixing in a mixer.
When in use, 23 to 28 weight percent of water is added into the prepared mortar material, and the mixture is stirred by a stirrer or manually to form the mortar with fluidity, and then the mortar is poured on the ground.
The high-strength gypsum (alpha crystal form hemihydrate gypsum) is from Jiangsu Yifu gypsum Co, and the building gypsum (beta crystal form hemihydrate gypsum) is from North New group building materials Co; in the application, the sand, the coarse whiting, the cement, the nano superfine calcium carbonate, the rubber powder and the additive are all commercial products.
Example 1:
taking 40 parts by weight of high-strength gypsum, 15 parts by weight of river sand of 40-70 meshes, 20 parts by weight of river sand of 70-140 meshes, 8 parts by weight of heavy calcium carbonate with the granularity of 400 meshes, 8 parts by weight of slag portland cement with the strength grade of 32.5, 7 parts by weight of nano superfine calcium carbonate with the particle size of 0.1 mu m and 2 parts by weight of rubber powder of Wake chemical 5010N to form a main material; 0.08 part by weight of polycarboxylic acid water reducing agent 530P produced by the company Cika, MH300P20.02 parts by weight of cellulose ether water retaining agent produced by the company Nippon, 0.008 part by weight of retarder 200P produced by the company Cika and 88500.04 parts by weight of defoaming agent P produced by the company AGITAN in Germany are taken to form the admixture. Uniformly mixing the main material and the additive to prepare the gypsum self-leveling material with good water retention, and mixing the prepared gypsum self-leveling material with water in a ratio of 1:0.23, and preparing the gypsum self-leveling mortar with good water retention.
Example 2:
taking 45 parts by weight of building gypsum, 10 parts by weight of 40-70 mesh ore sand, 20 parts by weight of 70-140 mesh ore sand, 10 parts by weight of 300 mesh heavy calcium carbonate, 5 parts by weight of ordinary portland cement with the strength grade of 42.5, 9 parts by weight of nano superfine calcium carbonate with the particle size of 0.02 mu m and 1 part by weight of wacker chemical 5044N rubber powder as main materials; 0.10 part by weight of polycarboxylic acid water reducing agent LonS-P (H) (produced by Zhejiang Longsheng company), MH300P20.04 parts by weight of cellulose ether water retaining agent produced by Japan shin-Etsu company, 0.010 part by weight of retarder PE produced by Italy SISIIT 2000 company and 88560.04 parts by weight of defoaming agent P produced by Germany AGITAN are taken to form an additive. Uniformly mixing the main material and the additive to prepare the gypsum self-leveling material with good water retention, and mixing the prepared gypsum self-leveling material with water in a ratio of 1: 0.26, and preparing the gypsum self-leveling mortar with good water retention.
Example 3:
taking 25 parts by weight of high-strength gypsum, 25 parts by weight of building gypsum, 9 parts by weight of 40-70 mesh sand, 21 parts by weight of 70-140 mesh sand, 8 parts by weight of 300-mesh heavy calcium carbonate, 6 parts by weight of ordinary portland cement with the strength grade of 52.5, 7 parts by weight of nano superfine calcium carbonate with the particle size of 0.05 mu m and 1 part by weight of Wacker chemical 5010N rubber powder as main materials; 0.15 part by weight of polycarboxylic acid water reducing agent LonS-P (H) (produced by Zhejiang Longsheng company), MH300P20.05 parts by weight of cellulose ether water retaining agent produced by Japan shin-Etsu company, 0.012 part by weight of retarder P produced by Italy SISIIT 2000 company and 88560.06 parts by weight of defoaming agent P produced by Germany AGITAN are taken to form an additive. Uniformly mixing the main material and the additive to prepare the gypsum self-leveling material with good water retention, and mixing the prepared gypsum self-leveling material with water in a ratio of 1: 0.28 weight ratio to prepare the gypsum self-leveling mortar with good water retention property.
Comparative example 1:
according to the method of example 1, gypsum self-leveling mortar without nano-ultrafine calcium carbonate was prepared:
taking 43 parts of high-strength gypsum, 16 parts of 40-70-mesh sand, 21 parts of 70-140-mesh sand, 10 parts of heavy calcium with the granularity of 400 meshes, 8 parts of Portland slag cement with the strength grade of 32.5 and 2 parts of Wake chemical 5010N rubber powder to form a main material; 0.08 part by weight of polycarboxylic acid water reducing agent 530P produced by the company Cika, MH300P20.02 parts by weight of cellulose ether water retaining agent produced by the company Nippon, 0.008 part by weight of retarder 200P produced by the company Cika and 88500.04 parts by weight of defoaming agent P produced by the company AGITAN in Germany are taken to form the admixture. Uniformly mixing the main material and the additive to prepare the gypsum self-leveling material, and mixing the prepared gypsum self-leveling material with water in a ratio of 1:0.23 weight ratio to prepare the gypsum self-leveling mortar.
Preparing the gypsum self-leveling mortar.
Comparative example 2:
a cement-free gypsum self-levelling mortar was prepared according to the method of example 1:
taking 43 parts of high-strength gypsum, 16 parts of 40-70-mesh sand, 21 parts of 70-140-mesh sand, 10 parts of heavy calcium with the granularity of 400 meshes, 8 parts of nano superfine calcium carbonate with the particle size of 0.1 mu m and 2 parts of Wake chemical 5010N rubber powder as main materials; 0.08 part by weight of polycarboxylic acid water reducing agent 530P produced by the company Cika, MH300P20.02 parts by weight of cellulose ether water retaining agent produced by the company Nippon, 0.008 part by weight of retarder 200P produced by the company Cika and 88500.04 parts by weight of defoaming agent P produced by the company AGITAN in Germany are taken to form the admixture. Uniformly mixing the main material and the additive to prepare the gypsum self-leveling material, and mixing the prepared gypsum self-leveling material with water in a ratio of 1: 0.25 weight ratio to prepare the gypsum self-leveling mortar.
Comparative example 3:
a gypsum self-leveling mortar free of 70-140 mesh sand was prepared according to the method of example 1:
taking 40 parts by weight of high-strength gypsum, 35 parts by weight of 40-70-mesh sand, 8 parts by weight of heavy calcium carbonate with the granularity of 400 meshes, 8 parts by weight of slag portland cement with the strength grade of 32.5, 7 parts by weight of nano superfine calcium carbonate with the grain diameter of 0.1 mu m and 2 parts by weight of watt chemical 5010N rubber powder as main materials; 0.08 part by weight of polycarboxylic acid water reducing agent 530P produced by the company Cika, MH300P20.02 parts by weight of cellulose ether water retaining agent produced by the company Nippon, 0.008 part by weight of retarder 200P produced by the company Cika and 88500.04 parts by weight of defoaming agent P produced by the company AGITAN in Germany are taken to form the admixture. Uniformly mixing the main material and the additive to prepare the gypsum self-leveling material, and mixing the prepared gypsum self-leveling material with water in a ratio of 1: 0.27 weight ratio to prepare the gypsum self-leveling mortar.
Performance testing
The gypsum self-leveling mortars prepared in the above examples and comparative examples were tested for performance according to JC/T1023-2007 standard. The results are reported in Table 1.
Table 1 test results of gypsum self-leveling mortar of example 1
As can be seen from table 1, the gypsum self-leveling mortar prepared in examples 1 to 3 of the present application has an absolute dry compressive strength within a range from 37.6Mpa to 39.8Mpa, an absolute dry flexural strength within a range from 11.0Mpa to 12.5Mpa, which is significantly higher than a standard requirement, and a shrinkage rate also meets the standard requirement, and the initial fluidity, the 30min fluidity loss and the setting time indicate that the gypsum self-leveling mortar prepared in the present application has no problem in construction.
In addition, in terms of initial fluidity, 30min fluidity loss, setting time and strength, the examples 1 to 3 are all superior to the comparative examples 1 to 3, and particularly, the 30min fluidity loss of the gypsum self-leveling mortar prepared by the application is 0, which shows that the gypsum self-leveling mortar prepared by the application has high water retention rate.
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 (13)
1. A high water retention gypsum self-leveling material, wherein the raw materials of the gypsum self-leveling material comprise: nano superfine calcium carbonate;
the grain size of the nanometer superfine calcium carbonate is 0.02-0.1 μm.
2. The gypsum self-leveling material of claim 1, wherein the raw materials of the gypsum self-leveling material comprise, in parts by weight: 40-50 parts of gypsum clinker, 30-40 parts of sand, 8-10 parts of heavy calcium, 5-8 parts of cement, 5-10 parts of nano superfine calcium carbonate, 1-2 parts of rubber powder, 0.08-0.15 part of water reducing agent, 0.02-0.05 part of water retaining agent, 0.008-0.012 part of retarder and 0.04-0.07 part of defoaming agent.
3. The gypsum self-leveling material of claim 2, wherein the gypsum clinker is one or both of alpha or beta crystalline hemihydrate gypsum.
4. The gypsum self-leveling material of claim 2, wherein the sand is one or both of ore sand, river sand; optionally, the sand grading range is 40-70 mesh sand, 70-140 mesh sand is 1 (1-3).
5. The gypsum self-leveling material as recited in claim 2, wherein the fineness of the coarse whiting is 200-400 mesh.
6. The gypsum self-leveling material of claim 2, wherein the cement is one or both of portland cement or portland slag cement; optionally, the cement strength rating is 32.5-52.5.
7. The gypsum self-leveling material of any one of claims 2 to 6, wherein the glue powder is selected from one or more of vinyl acetate-ethylene copolymer and ethylene-acrylic acid graft copolymer.
8. The gypsum self-leveling material according to any one of claims 2 to 6, wherein the water reducing agent is selected from one or more of a polycarboxylate water reducing agent, a benzene sulfonate-based water reducing agent, a lignosulfonate-based water reducing agent, a naphthalene-based water reducing agent, and a melamine-based water reducing agent.
9. The gypsum self-leveling material of any one of claims 2 to 6, wherein the water retaining agent is selected from cellulose or an etherate thereof.
10. The gypsum self-leveling material of any one of claims 2 to 6, wherein the set retarder is selected from one or more of citric acid, sodium citrate, sodium hexametaphosphate, borax, lignosulfonate, sodium carboxymethylcellulose, hydroxyethylcellulose, 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.
11. The gypsum self-leveling material according to any one of claims 2 to 6, wherein the defoamer is one or both of a polyether defoamer and a higher alcohol fatty acid ester complex defoamer.
12. The method for preparing the gypsum self-leveling material according to any one of claims 1 to 11, wherein the method for preparing the gypsum self-leveling material with high water retention is to weigh the raw materials in proportion and mix the raw materials uniformly in a mixer.
13. A gypsum self-levelling screed comprising the gypsum self-levelling material of any one of claims 1 to 12 and water in a weight ratio of 1: 0.23-0.28.
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| CN112159191A (en) * | 2020-09-21 | 2021-01-01 | 重庆兴渝新材料研究院有限公司 | Gypsum-based self-leveling and preparation method thereof |
| CN113213866A (en) * | 2021-03-25 | 2021-08-06 | 中建材创新科技研究院有限公司 | Gypsum self-leveling material |
| CN113511872A (en) * | 2021-03-18 | 2021-10-19 | 中建材创新科技研究院有限公司 | Gypsum ground leveling mortar and preparation method thereof |
| CN114105586A (en) * | 2021-11-18 | 2022-03-01 | 中建材创新科技研究院有限公司 | Gypsum self-leveling material |
| CN115368095A (en) * | 2022-08-16 | 2022-11-22 | 安徽倍兆业建材科技有限公司 | Light heat-preservation sound-insulation self-leveling mortar system and construction method thereof |
| CN115432984A (en) * | 2022-09-14 | 2022-12-06 | 山东中岩重科新材料科技有限公司 | Application of limestone ultrafine powder in gypsum-based self-leveling mortar and gypsum-based self-leveling mortar |
| CN116041022A (en) * | 2022-11-25 | 2023-05-02 | 深圳市青青源科技有限公司 | High-precision dimension self-leveling gypsum and manufacturing method thereof |
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