CN111960793B - Preparation method of water-resistant and anti-seismic gypsum-based self-leveling material - Google Patents
Preparation method of water-resistant and anti-seismic gypsum-based self-leveling material Download PDFInfo
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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
- C04B28/16—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 anhydrite, e.g. Keene's cement
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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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/60—Flooring 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
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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
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention provides a preparation method of a waterproof and anti-seismic gypsum-based self-leveling material, which comprises the following steps: step 1, taking the following components in parts by weight: mixing and stirring 100-120 parts of anhydrous phosphogypsum, 10-15 parts of silica fume, 20-30 parts of modified superfine steel slag and 1-5 parts of straw powder nanocrystalline for 10-20 min to obtain a solid mixture A; step 2, taking the following components in parts by weight: 0.1-0.5 part of defoaming agent, 0.4-0.8 part of water reducing agent, 0.2-0.6 part of water retaining agent, 6-8 parts of composite activator and 70 parts of water are stirred for 10-20 min and uniformly mixed to obtain a liquid mixture B; and 3, mixing and stirring the solid mixture A and the liquid mixture B obtained in the steps 1 and 2 for 5-10 min to obtain the anti-seismic gypsum-based self-leveling material. The gypsum-based self-leveling material prepared by the method has good fluidity, stability, high strength and high shock resistance through a specific construction process.
Description
Technical Field
The invention belongs to the technical field of self-leveling materials, and particularly relates to a preparation method of a water-resistant and anti-seismic gypsum-based self-leveling material.
Background
The gypsum-based self-leveling material is a novel ground material. The gypsum self-leveling material has good fluidity and stability in the construction process, and does not have the adverse phenomena of segregation, layering, bleeding and the like before setting and hardening. Meanwhile, the surface layer is thin, the construction speed is high, the surface is smooth and clean, and the water resistance and the acid resistance are good. The gypsum-based self-leveling material is mainly prepared by mixing gypsum serving as a base material, aggregate, mineral admixture, water reducing agent, retarder, defoamer, pigment and the like. The gypsum-based material also has good heat preservation and sound insulation characteristics, and the porous structure of the gypsum material enables the gypsum-based material to have a breathing function, so that the indoor temperature and humidity can be adjusted, and the living comfort level is improved. Meanwhile, the energy consumption and the production pollution in the production process are less than those of cement, the environment is harmed little, and the building material is an environment-friendly building material. However, the base material of the gypsum-based self-leveling material is generally phosphogypsum, the content of impurities of the phosphogypsum is high, and the performance has great difference, so the application is limited to a certain extent. However, with the improvement of the performance of the base material product in the gypsum-based self-leveling material, the performance of the gypsum-based self-leveling material is more and more superior, and the application range of the gypsum-based self-leveling material in the building material industry can be expanded.
The nano-cellulose is a novel nano-material with the characteristics of good mechanical property, light weight, high specific surface area, reproducibility, biodegradability and the like. Cellulose is the most abundant natural biopolymer material in nature. With the increasing awareness of environmental protection, the cellulose with the nano-scale structure has the excellent characteristics of natural cellulose and nano-materials, and shows wider application prospect. The nano-cellulose is cellulose with at least one dimension in the nano-scale (1-100 nm), and mainly comprises microfibrillated cellulose, nano-cellulose crystals and bacterial nano-cellulose. Compared with macroscopic cellulose, the nano cellulose has the characteristics of high specific surface area, high tensile strength and the like, and is a novel nano material with great development potential. Due to the unique nano structure and performance advantages of the nano cellulose, the development of the nano cellulose from fiber raw materials and the preparation of the biomass-based nano composite material with functionality and high strength by using the nano cellulose become key points and hot spots in the cellulose research field at home and abroad in recent years. The nano-cellulose is applied to inorganic materials, can form a three-dimensional space network structure with the inorganic materials, endows the inorganic materials with better mechanical strength, improves the defects of poor performance, high brittleness, easy deformation and the like of single-component inorganic materials, and simultaneously can be biodegraded as the nano-cellulose has the advantages of natural raw materials. The nano-cellulose has good affinity with inorganic materials, can be effectively combined through strong hydrogen bond action with hydroxyl to form a self-adaptive structure, and achieves the effect of weakening local stress of an interface. When the nano composite material is stressed by the outside, the nano cellulose particles can slide along the surface of the material, and after the nano composite material is moved to a new position, the broken bonds are re-connected to form new bonds (mainly hydrogen bonds), so that a certain bonding strength can be still kept between the nano cellulose and the inorganic material, and the damage of the stress to the nano composite material can be effectively relieved.
The patent application with publication number CN105777025A discloses a light heat-insulating early-strength cement-based ground self-leveling material and a preparation method thereof, wherein the light heat-insulating early-strength cement-based ground self-leveling material is prepared by taking ordinary portland cement and early-strength fast-hardening sulphoaluminate cement as base materials and adding mineral admixture, water reducing agent, defoaming agent, water-retaining agent, rubber powder, toughening agent and the like. This method does not improve the fluidity of the material, and has complicated steps, too much raw material, and no economical problems.
The patent application with the publication number of CN106220115A discloses a gypsum-based self-leveling material prepared from iron tailing fine sand, high-strength gypsum and cement, and a preparation method of the gypsum-based self-leveling material. Adding high-efficiency polycarboxylic acid water reducing agent, redispersible latex powder, gypsum retarder, defoaming agent, water-retaining agent and the like to prepare the gypsum-based ground self-leveling material. The high-strength gypsum used in the method has higher price, more types of additives are added, and the operation is not easy.
The invention aims to obtain the water-resistant and shock-resistant gypsum-based self-leveling material by mixing the anhydrous phosphogypsum, the modified superfine steel slag and the straw powder which are obtained by calcining industrial byproduct gypsum at high temperature, degrading the crushed materials in an acid environment, filtering, freezing and drying the crushed materials to obtain the straw powder nanocrystal, the silica fume, the water reducing agent, the defoaming agent and the water retaining agent, and curing the mixture at room temperature.
Disclosure of Invention
Aiming at the problems in the prior art, the technical scheme adopted by the invention for solving the problems in the prior art is as follows:
the preparation method of the water-resistant and shock-resistant gypsum-based self-leveling material is characterized by comprising the following steps of:
step 1, taking the following components in parts by weight: mixing and stirring 100-120 parts of anhydrous phosphogypsum, 10-15 parts of silica fume, 20-30 parts of modified superfine steel slag and 1-5 parts of straw powder nanocrystalline for 10-20 min to obtain a solid mixture A;
step 2, taking the following components in parts by weight: 0.1-0.5 part of defoaming agent, 0.4-0.8 part of water reducing agent, 0.2-0.6 part of water retaining agent, 6-8 parts of composite activator and 70 parts of water are stirred for 10-20 min and uniformly mixed to obtain a liquid mixture B;
and 3, mixing and stirring the solid mixture A and the liquid mixture B obtained in the steps 1 and 2 for 5-10 min to obtain the anti-seismic gypsum-based self-leveling material.
The preparation process of the modified superfine steel slag in the step 1 comprises the following steps: taking 100 parts of steel slag, and mixing the steel slag in a water-cement ratio of 1: under the condition of 1, wet grinding is carried out for 2 hours by using nano ceramic balls until the size is about 8 mu m, the wet grinding slurry is taken and freeze-dried to obtain superfine steel slag, 20 parts of the superfine steel slag are taken and dispersed in 100 parts of water, 3-5 parts of fluorine-containing polysilane by weight is added, the treatment is carried out for 30-60 min, and the modified superfine steel slag is obtained by centrifugation and freeze-drying.
The fluorine-containing polysilane is one of (trifluoromethyl) trimethylsilane, trimethylsilyl trifluoroacetate or perfluorooctyltriethoxysilane.
The straw powder nanocrystalline in the step 1 is prepared by using 20-40 parts of straw powder or coconut shell powder, crushing, degrading by using 100 parts of 30% dilute sulfuric acid for 30-50min, filtering to obtain a dispersion liquid, and freeze-drying to obtain the nanocrystalline.
The anhydrous phosphogypsum in the step 2 is calcined at 500 ℃ for 1 hour.
The silica fume in the step 2 is silica fume with the particle size of about 0.1-0.2 mm, and the specific surface area of the silica fume is 19-25 m2/g。
The defoaming agent in the step 3 is a mixture of tributyl phosphate and polydimethylsiloxane.
And the water reducing agent in the step 3 is a mixture of a polyacrylic acid water reducing agent and a polycarboxylic acid water reducing agent.
The water-retaining agent in the step 3 is a mixture of methylcellulose and starch ether, and the mass ratio of the methyl cellulose to the starch ether is 2: 3.
The compound exciting agent in the step 3 is a mixture of potassium sulfate and calcium hydroxide.
The invention adds the straw powder nanocrystalline obtained by crushing the straw powder, degrading in an acid environment and finally filtering, freezing and drying into the gypsum-based self-leveling material, fully utilizes the advantages of higher mechanical strength and thermal stability of the cellulose nanocrystalline composite material, makes up the defect of insufficient strength of the anhydrous phosphogypsum, and simultaneously improves the anti-seismic performance of the self-leveling material. The mineral admixture silica fume can obviously improve the compression resistance, the folding resistance, the seepage resistance, the corrosion resistance, the impact resistance and the wear resistance of the material, and has the functions of water retention, segregation prevention, water bleeding and great reduction of pumping resistance. In addition, the silica fume can prolong the service life of the material, particularly the corrosion of chlorine salt, and improve the durability of the material. The modified superfine steel slag can further promote the hydration reaction of gypsum, and Ca in the gypsum2+Can be respectively mixed with SiO in the steel slag2And Al2O3C-S-H gel and hydrated calcium aluminate are generated. These substances all contribute to the strength and stability of the self-levelling material. Meanwhile, the particle size of the modified superfine steel slag is far smaller than that of gypsum particles, so that the modified superfine steel slag can be filled in gaps among the gypsum particles, the compactness of the material is increased, and the strength and the durability of the gypsum-based self-leveling material are greatly improved. The modified superfine steel slag particles have large specific surface area, need more free water to wrap, and are not easy to lose and disperse, so that the gypsum-based self-leveling material is not easy to separate and bleed.
The invention prepares the water-resistant and shock-resistant gypsum-based self-leveling material by crushing the anhydrous phosphogypsum, the modified superfine steel slag and the straw powder which are obtained by calcining the industrial byproduct gypsum at high temperature, degrading the crushed materials in an acid environment, filtering, freezing and drying the crushed materials to obtain the nano-crystalline straw powder, mixing the nano-crystalline straw powder, the siliceous dust, the water reducing agent, the defoaming agent and the water-retaining agent, and curing the mixture at room temperature. The gypsum-based self-leveling material prepared by the method utilizes industrial byproduct gypsum waste, and has low manufacturing cost. The gypsum-based material has the characteristics of light weight, heat preservation, excellent sound insulation performance, capability of automatically adjusting indoor temperature and humidity, easy construction and operation and better practicability. The nano-cellulose has the characteristics of high specific surface area, high tensile strength, high hydrophilicity, high crystallinity and the like, and forms a three-dimensional space network structure with an inorganic material, so that the material is endowed with better mechanical strength, and the defects of poor performance, high brittleness, easy deformation and the like of a single-component inorganic material are overcome. The cellulose nanocrystalline polymer is added into the gypsum-based self-leveling material, the advantages of high mechanical strength and high thermal stability of the cellulose nanocrystalline polymer composite material are fully utilized, the defect of insufficient strength of the anhydrous phosphogypsum is overcome, and the strength and the shock resistance of the self-leveling material are improved.
The invention has the following advantages:
the invention provides a preparation method of a waterproof and anti-seismic gypsum-based self-leveling material, and the material prepared by the method is the waterproof and anti-seismic gypsum-based self-leveling material. The gypsum-based self-leveling material has good fluidity and stability, does not have the undesirable phenomena of segregation, delamination, bleeding and the like before setting and hardening, can automatically level under the action of dead weight or slight external force, is firmly bonded with a base layer, and has high strength and high shock resistance. The prepared raw material gypsum is from industrial solid wastes, so that the recycling of resources is realized, the manufacturing cost is greatly reduced, and the problem of stacking of the phosphogypsum is relieved to a certain extent.
In addition, the invention combines the nanometer material and the inorganic material to form complementary advantages. The nano-cellulose has the characteristics of high specific surface area, high tensile strength and the like, and forms a three-dimensional space network structure with an inorganic material, so that the material is endowed with better mechanical strength, and the defects of poor performance, high brittleness, easy deformation and the like of the material are overcome.
The mineral admixture silica fume can obviously improve the compression resistance, the folding resistance, the seepage resistance, the corrosion resistance, the impact resistance and the wear resistance of the material, and has the functions of water retention, segregation prevention, water bleeding and great reduction of pumping resistance. In addition, the silica fume can prolong the service life of the material, particularly the corrosion of chlorine salt,the durability of the material is improved. The modified superfine steel slag can further promote the hydration reaction of gypsum, and Ca in the gypsum2+Can be respectively mixed with SiO in the steel slag2And Al2O3C-S-H gel and hydrated calcium aluminate are generated. These substances all contribute to the strength and stability of the self-levelling material. Meanwhile, the particle size of the modified superfine steel slag is far smaller than that of gypsum particles, so that the modified superfine steel slag can be filled in gaps among the gypsum particles, the compactness of the material is increased, and the strength and the water resistance of the gypsum-based self-leveling material are greatly improved. The modified superfine steel slag particles have large specific surface area, need more free water to wrap, and are not easy to lose and disperse, so that the gypsum-based self-leveling material is not easy to separate and bleed, and the material is more stable.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments:
examples 1,
1) Taking the following components in parts by weight: mixing and stirring 100 parts of anhydrous phosphogypsum, 10 parts of silica fume, 20 parts of modified superfine steel slag and 1 part of straw powder nanocrystal for 10min to obtain a solid mixture A;
2) taking the following components in parts by weight: 0.1 part of defoaming agent, 0.4 part of water reducing agent, 0.2 part of water retaining agent, 6 parts of composite exciting agent and 70 parts of water are stirred for 10min and uniformly mixed to obtain a liquid mixture B;
3) mixing and stirring the solid mixture and the liquid mixture obtained in the steps 1) and 2) to obtain the gypsum-based self-leveling material.
Examples 2,
1) Taking the following components in parts by weight: mixing and stirring 102 parts of anhydrous phosphogypsum, 11 parts of silica fume, 21 parts of modified superfine steel slag and 2 parts of straw powder nanocrystal for 11min to obtain a solid mixture A;
2) taking the following components in parts by weight: 0.2 part of defoaming agent, 0.5 part of water reducing agent, 0.3 part of water retaining agent, 7 parts of exciting agent and 70 parts of water are stirred for 11min and uniformly mixed to obtain a liquid mixture B;
3) mixing and stirring the solid mixture and the liquid mixture obtained in the steps 1) and 2) to obtain the gypsum-based self-leveling material.
Examples 3,
1) Taking the following components in parts by weight: mixing and stirring 103 parts of anhydrous phosphogypsum, 12 parts of silica fume, 22 parts of modified superfine steel slag and 3 parts of straw powder nanocrystal for 12min to obtain a solid mixture A;
2) taking the following components in parts by weight: 0.3 part of defoaming agent, 0.6 part of water reducing agent, 0.4 part of water retaining agent, 8 parts of composite exciting agent and 70 parts of water are stirred for 12min and uniformly mixed to obtain a liquid mixture B;
3) mixing and stirring the solid mixture and the liquid mixture obtained in the steps 1) and 2) to obtain the anhydrous gypsum-based ground self-leveling material.
Examples 4,
1) Taking the following components in parts by weight: 105 parts of anhydrous phosphogypsum, 13 parts of silica fume, 23 parts of modified superfine steel slag and 4 parts of straw powder nanocrystal are mixed and stirred for 13min to obtain a solid mixture A;
2) taking the following components in parts by weight: 0.4 part of defoaming agent, 0.7 part of water reducing agent, 0.5 part of water retaining agent, 9 parts of composite exciting agent and 70 parts of water are stirred for 13min and uniformly mixed to obtain a liquid mixture B;
3) mixing and stirring the solid mixture and the liquid mixture obtained in the steps 1) and 2) to obtain the anhydrous gypsum-based ground self-leveling material.
Examples 5,
1) Taking the following components in parts by weight: 106 parts of anhydrous phosphogypsum, 15 parts of silica fume, 25 parts of modified superfine steel slag and 5 parts of straw powder nanocrystal are mixed and stirred for 14min to obtain a solid mixture;
2) taking the following components in parts by weight: 0.5 part of defoaming agent, 0.8 part of water reducing agent, 0.6 part of water retaining agent, 20 parts of composite exciting agent and 70 parts of water are stirred for 14min and uniformly mixed to obtain a liquid mixture;
3) mixing and stirring the solid mixture and the liquid mixture obtained in the steps 1) and 2) to obtain the anhydrous gypsum-based ground self-leveling material.
TABLE 1 results of product Performance test obtained in examples
According to the standard JC/T1023-2007 for gypsum-based self-leveling mortars, the loss of fluidity of the gypsum-based self-leveling mortar at 30min is required to be not more than 3 mm. According to the data of each group in the embodiment, the maximum is 2mm, and each group meets the standard requirement; the initial setting time of the gypsum-based self-leveling mortar is required to be not less than 1 h. According to the embodiment, the minimum time is 1.7h, and each group meets the standard requirement; the final setting time of the gypsum-based self-leveling mortar is required to be not more than 6 h. According to the data of each group in the embodiment, the maximum is 4.1h, and each group meets the standard requirement; the 24-hour flexural strength of the gypsum-based self-leveling mortar is required to be not less than 2.5MPa, and according to the embodiment, the minimum flexural strength of each group of data is 2.8MPa, and each group meets the standard requirement; the 24-hour compressive strength of the gypsum-based self-leveling mortar is required to be not less than 6MPa, and according to the embodiment, the minimum of all groups of data is 6.3MPa, and all groups of data meet the standard requirement; the oven-dry breaking strength of the gypsum-based self-leveling mortar is required to be not less than 7.5MPa, and according to the embodiment, the minimum of all groups of data can be seen to be 8.8MPa, and all groups of data meet the standard requirement; the absolute dry compressive strength of the gypsum-based self-leveling mortar is required to be not less than 20MPa, and according to the embodiment, the minimum absolute dry compressive strength of each group of data is 21.6MPa, and each group of data meets the standard requirement; the tensile bonding strength of the gypsum-based self-leveling mortar is required to be not less than 1MPa, and the minimum value is 1.6MPa according to various groups of data in the embodiment, and all the groups meet the standard requirement; the shrinkage of the gypsum-based self-leveling mortar is required to be not more than 0.05%, and the maximum shrinkage is 0.02% according to the data of the embodiments, and all the groups meet the standard requirements; the softening coefficient of the water-resistant material is required to be not less than 0.75, and as can be seen from the respective groups of data according to the examples, the minimum is 0.75, and each group satisfies the standard requirements.
The protective scope of the present invention is not limited to the above-described embodiments, and it is apparent that various modifications and variations can be made to the present invention by those skilled in the art without departing from the scope and spirit of the present invention. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (8)
1. The preparation method of the water-resistant and shock-resistant gypsum-based self-leveling material is characterized by comprising the following steps of:
step 1, taking the following components in parts by weight: mixing and stirring 100-120 parts of anhydrous phosphogypsum, 10-15 parts of silica fume, 20-30 parts of modified superfine steel slag and 1-5 parts of straw powder nanocrystalline for 10-20 min to obtain a solid mixture A;
step 2, taking the following components in parts by weight: 0.1-0.5 part of defoaming agent, 0.4-0.8 part of water reducing agent, 0.2-0.6 part of water retaining agent, 6-8 parts of composite activator and 70 parts of water are stirred for 10-20 min and uniformly mixed to obtain a liquid mixture B;
step 3, mixing and stirring the solid mixture A and the liquid mixture B obtained in the steps 1 and 2 for 5-10 min to obtain the anti-seismic gypsum-based self-leveling material;
20-40 parts of straw powder or coconut shell powder is used as the straw powder nanocrystal in the step 1, and the straw powder nanocrystal is crushed, degraded by 100 parts of 30% dilute sulfuric acid for 30-50min, filtered to obtain a dispersion liquid, and freeze-dried to obtain the nanocrystal;
the preparation process of the modified superfine steel slag in the step 1 comprises the following steps: taking 100 parts of steel slag, and mixing the steel slag in a water-cement ratio of 1: under the condition of 1, wet grinding is carried out for 2 hours by using nano ceramic balls until the size is about 8 mu m, the wet grinding slurry is taken and freeze-dried to obtain superfine steel slag, 20 parts of the superfine steel slag are taken and dispersed in 100 parts of water, 3-5 parts of fluorine-containing polysilane by weight is added, the treatment is carried out for 30-60 min, and the modified superfine steel slag is obtained by centrifugation and freeze-drying.
2. The preparation method of the water and earthquake resistant gypsum-based self-leveling material according to claim 1, wherein the preparation method comprises the following steps: the fluorine-containing polysilane is one of trimethylsilane, trimethylsilyl trifluoroacetate or perfluorooctyltriethoxysilane.
3. The preparation method of the water and earthquake resistant gypsum-based self-leveling material according to claim 1, wherein the preparation method comprises the following steps: the anhydrous phosphogypsum in the step 2 is calcined at 500 ℃ for 1 hour.
4. The preparation method of the water and earthquake resistant gypsum-based self-leveling material according to claim 1, wherein the preparation method comprises the following steps: the silica fume in the step 2 is silica fume with the particle size of 0.1-0.2 mm, and the specific surface area of the silica fume is 19-25 m2/g。
5. The preparation method of the water and earthquake resistant gypsum-based self-leveling material according to claim 1, wherein the preparation method comprises the following steps: the defoaming agent in the step 3 is a mixture of tributyl phosphate and polydimethylsiloxane.
6. The preparation method of the water and earthquake resistant gypsum-based self-leveling material according to claim 1, wherein the preparation method comprises the following steps: and the water reducing agent in the step 3 is a mixture of a polyacrylic acid water reducing agent and a polycarboxylic acid water reducing agent.
7. The preparation method of the water and earthquake resistant gypsum-based self-leveling material according to claim 1, wherein the preparation method comprises the following steps: the water-retaining agent in the step 3 is a mixture of methylcellulose and starch ether, and the mass ratio of the methyl cellulose to the starch ether is 2: 3.
8. The preparation method of the water and earthquake resistant gypsum-based self-leveling material according to claim 1, wherein the preparation method comprises the following steps: the compound exciting agent in the step 3 is a mixture of potassium sulfate and calcium hydroxide.
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| JPH02302352A (en) * | 1989-05-15 | 1990-12-14 | Mitsubishi Materials Corp | Rapid hardening type self-leveling composition for floor covering material |
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| AU2017278398A1 (en) * | 2016-06-09 | 2019-01-03 | Basf Se | Hydration control mixture for mortar and cement compositions |
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