Water-resistant gypsum-based tile adhesive and method for its preparation

Abstract

The application provides a water-resistant gypsum-based ceramic tile adhesive and a preparation method thereof. The raw materials for preparing the water-resistant gypsum-based ceramic tile adhesive include a first component and a second component. The raw materials for preparing the first component include 30-45 parts of gypsum, 1-5 parts of ferric aluminate cement, 5-15 parts of Portland cement, 50-80 parts of quartz sand and 3-10 parts of silica fume, in terms of mass fraction. The raw materials for preparing the second component include 20-35 parts of vinyl acetate-ethylene copolymer emulsion, 20-35 parts of butyl emulsion and 10-20 parts of styrene-acrylic emulsion. The water-resistant gypsum-based ceramic tile adhesive provided by the application is based on the gypsum in the first component, and the ferric aluminate cement, the Portland cement and the silica fume are introduced to enhance the bonding performance between the gypsum-based ceramic tile adhesive and the gypsum base layer, and solve the problem of asynchronous thermal expansion and cold contraction caused by the mismatch between the existing ceramic tile adhesive and the water-resistant gypsum base layer material. The combination with the second component can further enhance the bonding strength and water resistance of the water-resistant gypsum-based ceramic tile adhesive.

Description

Technical Field

[0001] This invention belongs to the field of building materials, and particularly relates to a water-resistant gypsum-based ceramic tile adhesive and its preparation method. Background Technology

[0002] Currently, gypsum-based self-leveling mortar and gypsum plastering mortar are widely used as wall and floor base materials in real estate developments and home decoration. However, when tiles are laid on gypsum-based walls and floors, a large number of tiles detach. The reason for this is that the mainstream tile adhesives on the market use cement as an inorganic binder, making them incompatible with the gypsum-based self-leveling mortar and gypsum plastering mortar. This incompatibility leads to asynchronous thermal expansion and contraction between the tile adhesive and the gypsum base, causing tiles to detach in large quantities and resulting in subsequent tile installation complaints. Therefore, current research focuses on developing gypsum-based tile adhesives. However, the water-sensitive nature of gypsum makes it unsuitable as an inorganic binder for use in tile adhesive systems, creating a bottleneck in the development of water-resistant gypsum-based tile adhesives. Summary of the Invention

[0003] To improve the water resistance and bonding performance of gypsum-based tile adhesive, this invention provides a water-resistant gypsum-based tile adhesive and its preparation method.

[0004] According to one aspect of the present invention, a water-resistant gypsum-based tile adhesive is provided. The raw materials for preparing the water-resistant gypsum-based tile adhesive include a first component and a second component. The first component, calculated by mass parts, comprises 30-45 parts gypsum, 1-5 parts aluminoferrite cement, 5-15 parts silicate cement, 50-80 parts quartz sand, and 3-10 parts silica fume. The second component comprises 20-35 parts vinyl acetate-ethylene copolymer emulsion, 15-35 parts styrene-butadiene emulsion, and 10-22 parts styrene-acrylic emulsion.

[0005] The water-resistant gypsum-based tile adhesive provided by this invention, based on the first component of gypsum, incorporates aluminoferrite cement, silicate cement, and silica fume to enhance the adhesion between the gypsum-based tile adhesive and the gypsum substrate, and solves the problem of asynchronous thermal expansion and contraction caused by the incompatibility between existing tile adhesives and water-resistant gypsum substrate materials. Specifically, the micro-expansion property of aluminoferrite cement can block the micropores generated in the slurry, alleviating the shrinkage effect caused by silicate cement. Combined with silica fume to fill the remaining micropores, this systematic material compatibility modification endows the water-resistant gypsum-based tile adhesive provided by this invention with excellent water-resistant bonding properties. Furthermore, since the second component, consisting of vinyl acetate-ethylene copolymer emulsion, styrene-butadiene emulsion, and styrene-acrylic emulsion, has good penetration and waterproofing properties, the combination of the first and second components can give the water-resistant gypsum-based tile adhesive good adhesion and water resistance, making it suitable for gypsum substrates.

[0006] Preferably, the particle size of the quartz sand is 40–120 mesh; by mass fraction, in the first component, 20–30 parts are quartz sand with a particle size of 40–70 mesh, and 30–50 parts are quartz sand with a particle size of 70–120 mesh. By combining quartz sand with different pore sizes, the water-resistant gypsum-based tile adhesive is given good heat insulation and sound insulation properties.

[0007] Preferably, the raw materials for preparing the first component, calculated by mass, also include 2 to 8 parts of vitrified microspheres.

[0008] Preferably, the raw materials for preparing the first component, calculated by weight, further include 3-7 parts of vinyl acetate-ethylene copolymer latex powder, 0.1-0.3 parts of 3mm polypropylene fiber, and 0.2-1 parts of wood fiber. The vinyl acetate-ethylene copolymer latex powder enhances the cohesive bonding strength of the water-resistant gypsum-based tile adhesive, while the combined use of 3mm polypropylene fiber and wood fiber absorbs the stress generated by the expansion and contraction of the water-resistant gypsum-based tile adhesive. By using vinyl acetate-ethylene copolymer latex powder, 3mm polypropylene fiber, and wood fiber in combination, the water-resistant gypsum-based tile adhesive of the present invention can be endowed with high bonding strength and good flexible crack resistance.

[0009] Preferably, the vinyl acetate-ethylene copolymer latex powder includes at least one of Wacker 8031 ​​hydrophobic latex powder and Elastane 2350 latex powder.

[0010] Preferably, the raw materials for preparing the first component, calculated by weight, further include 0.1 to 0.2 parts of fly ash and 0.1 to 0.2 parts of organosilicon powder. Introducing silica fume, fly ash, and organosilicon powder can further enhance the water resistance of the water-resistant gypsum-based tile adhesive provided by this invention.

[0011] Preferably, the first component further includes 0.1 to 1.5 parts of a first component additive, calculated by mass parts, wherein the first component additive includes at least one of low viscosity cellulose ether, medium viscosity cellulose, magnesium aluminum silicate, starch ether, and natural tartaric acid.

[0012] Preferably, the first component of the additives, calculated by weight, includes 0.1-0.2 parts of low-viscosity cellulose ether, 0.1-0.3 parts of medium-viscosity cellulose, 0.1-0.3 parts of magnesium aluminum silicate, 0.01-0.03 parts of starch ether, 0.1-0.2 parts of natural tartaric acid, and 0.2-0.5 parts of polycarboxylate superplasticizer. Firstly, by combining low-viscosity cellulose ether with medium-viscosity cellulose, the present invention enables the water-resistant gypsum-based tile adhesive to have better fullness and water retention compared to existing products, further improving the compatibility between the water-resistant gypsum-based tile adhesive and the water-resistant gypsum substrate. Secondly, the introduction of magnesium aluminum silicate and starch ether improves the application feel of the water-resistant gypsum-based tile adhesive, making it smoother and flatter during self-leveling. Finally, the introduction of natural...

[0013] Tartaric acid and polycarboxylate superplasticizers allow for a sufficiently extended drying time in water-resistant gypsum-based tile adhesives, ensuring that the adhesive wets the slurry at the appropriate time to reach the working state.

[0014] Preferably, the raw materials for preparing the water-resistant gypsum-based tile adhesive also include a third component, which comprises unpolished beer, wherein the pH of the unpolished beer is 3-3.8. In actual construction scenarios, because the water-resistant gypsum-based tile adhesive has a relatively fast setting speed, and in actual construction, it is necessary to prepare delay materials on-site to determine the setting speed of the construction materials according to the construction scenario and construction time. The applicant unexpectedly discovered that by adding unpolished beer, the setting speed of the first and second components can be adjusted, which can effectively extend the open time of the water-resistant gypsum-based tile adhesive without affecting its strength properties, and also help inhibit wall mold.

[0015] Preferably, the mass ratio of the first component to the second component to the third component is 1:0.1-0.5:0-0.3. This invention improves the formulation of the water-resistant gypsum-based tile adhesive by combining the first, second, and third components to achieve better water resistance, adhesion, and time-delay effect. By controlling the proportions of the first, second, and third components, the adhesive can be rationally formulated based on on-site construction needs to meet those requirements and control the open time of the water-resistant gypsum-based tile adhesive.

[0016] According to another aspect of the present invention, a method for preparing water-resistant gypsum-based tile adhesive as described above is provided. The method includes the following steps: preparing the first component: mixing the aluminoferrite cement, the silicate cement, the quartz sand, wood fiber, and 3mm polypropylene fiber to obtain mixed powder I; when the powder temperature of the mixed powder I is below 35°C, adding the remaining materials included in the first component to the mixed powder I, thereby obtaining the first component; in the above process, the mixing speed is 40-80 rpm; preparing the second component: mixing the materials included in the second component, and then subjecting the resulting mixed slurry to high-speed dispersion treatment and low-speed dispersion treatment in sequence, wherein the mixing speed of the high-speed dispersion treatment is 800-1200 rpm and the mixing speed of the low-speed dispersion treatment is 140-160 rpm, thereby obtaining the second component; mixing step: mixing the first component and the second component at a mass ratio of 1:0.1-0.5, with a mixing speed of 80-100 rpm.

[0017] Preferably, in the preparation of the second component, the styrene-acrylic emulsion, vinyl acetate-ethylene copolymer emulsion, and butadiene-styrene emulsion are added and mixed sequentially.

[0018] Preferably, in the preparation of the second component, 0.1 to 4.5 parts of the second component additive are also added according to the mass fraction.

[0019] Preferably, the second component additive includes a dispersant and an anti-settling agent.

[0020] Preferably, the second component of the additive includes 0.1 to 1 part of dispersant and 0.1 to 0.5 parts of anti-settling agent, calculated by mass parts.

[0021] Preferably, the dispersant includes Dow OROTAN 731A.

[0022] Preferably, the anti-settling agent includes Lotte Chemical 4010 cellulose ether.

[0023] Preferably, the method for preparing water-resistant gypsum-based tile adhesive further includes a step of preparing a third component, which includes: diluting beer stock with water to a pH of 4.2 to 5.8 to obtain the third component; and in the mixing step, the method further includes adding the third component to the mixed slurry obtained by mixing the first component and the second component. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of this invention will be clearly and completely described below in conjunction with the embodiments of this invention. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0025] Example 1

[0026] 1. Preparation of water-resistant gypsum-based tile adhesive materials

[0027] This embodiment provides a water-resistant gypsum-based tile adhesive. The raw materials and formulations required for preparing the water-resistant gypsum-based tile adhesive are shown in Table 1. The first component additive and the second component additive used in this treatment group to prepare the water-resistant gypsum-based tile adhesive are also shown in Table 1.

[0028] Table 1. Materials required for preparing water-resistant gypsum-based tile adhesive in the examples

[0029]

[0030]

[0031] 2. Method for preparing water-resistant gypsum-based tile adhesive

[0032] Preparation of the first component: Gypsum, aluminoferrite cement, silicate cement, quartz sand, wood fiber, and 3mm polypropylene fiber are mixed for 5 minutes at a temperature below 35°C and a rotation speed of 80 rpm to obtain mixed powder I. When the powder temperature of the mixed powder I is below 35°C, vinyl acetate-ethylene copolymer latex powder, organosilicon powder, mineral admixtures, vitrified microspheres, and the first component additive are added and mixed for 15 minutes at a rotation speed of 60 rpm to obtain the first component.

[0033] Preparation of the second component: Styrene-acrylic emulsion, vinyl acetate-ethylene copolymer emulsion, and butadiene-styrene emulsion are mixed sequentially, and then the second component additive is added. The mixture is stirred for 30 minutes at a temperature below 35°C and a speed of 800 rpm. Then the speed is reduced to 140 rpm and stirring is continued for 40 minutes to obtain the second component.

[0034] Preparation of the third component: Mix unpasteurized beer and water at room temperature and at a speed of 40 rpm for 1 minute to obtain the third component with a pH of 5.8;

[0035] Mixing steps: The mass ratio of component 1: component 2: component 3 is 1:0.1:0.16. Component 1 and component 2 are then mixed for 60 minutes at a temperature below 35°C and a rotation speed of 100 rpm. Component 3 is then added and mixed for 5 minutes at a temperature below 35°C and a rotation speed of 80 rpm to obtain water-resistant gypsum-based tile adhesive.

[0036] In this embodiment, different treatment groups and control groups were established based on the mass proportions of vinyl acetate-ethylene copolymer emulsion, styrene-butadiene emulsion, and styrene-acrylic emulsion added to the first component of the water-resistant gypsum-based tile adhesive (wherein, the mass ratio of vinyl acetate-ethylene copolymer emulsion, styrene-butadiene emulsion, and styrene-acrylic emulsion was maintained at 5:4:3). The variables for each treatment group and control group in this embodiment are shown in Table 2. Except for the differences mentioned above, the operation steps for preparing the water-resistant gypsum-based tile adhesive in each treatment group and control group of Example 1 were strictly consistent.

[0037] Table 2. Variables in treatment groups 1A-3A of Example 1 used for preparing water-resistant gypsum-based tile adhesive

[0038] Processing group 1A 25 20 15 Processing group 2A 20 16 12 Processing Group 3A 35 28 21

[0039] Control group 1A

[0040] This comparative group prepared gypsum-based tile adhesive according to the formula provided in treatment group 1A of Example 1. The difference between this comparative group and treatment group 1A of Example 1 is that this comparative group does not add vinyl acetate-ethylene copolymer emulsion (the total mass parts of butadiene-styrene emulsion and styrene-acrylic emulsion are 60, and the mass ratio of butadiene-styrene emulsion to styrene-acrylic emulsion is 4:3). Apart from the above differences, the operation steps for preparing gypsum-based tile adhesive in this comparative group are strictly consistent with those in treatment group 1A of Example 1.

[0041] Comparison group 2A

[0042] This comparative group prepared gypsum-based tile adhesive according to the formula provided in treatment group 1A of Example 1. The difference between this comparative group and treatment group 1A of Example 1 is that this comparative group does not add styrene-butadiene emulsion when preparing gypsum-based tile adhesive (the total mass fraction of vinyl acetate-ethylene copolymer emulsion and styrene-acrylic emulsion is 60, wherein, according to the mass ratio, vinyl acetate-ethylene copolymer emulsion: styrene-acrylic emulsion = 5:3). Apart from the above differences, the operation steps for preparing gypsum-based tile adhesive in this comparative group are strictly consistent with those in treatment group 1A of Example 1.

[0043] Comparison Group 3A

[0044] This comparative group prepared gypsum-based tile adhesive according to the formula provided in treatment group 1A of Example 1. The difference between this comparative group and treatment group 1A of Example 1 is that this comparative group does not add styrene-acrylic emulsion when preparing gypsum-based tile adhesive (the total mass fraction of vinyl acetate-ethylene copolymer emulsion and styrene-butadiene emulsion is 60, wherein, according to the mass ratio, vinyl acetate-ethylene copolymer emulsion: styrene-butadiene emulsion = 5:4). Apart from the above differences, the operation steps for preparing gypsum-based tile adhesive in this comparative group are strictly consistent with those in treatment group 1A of Example 1.

[0045] Test Example 1

[0046] 1. Test Object

[0047] Example 1: Gypsum-based tile adhesives prepared in each treatment group and the control group.

[0048] 2. Testing Methods

[0049] The samples to be tested were tested in accordance with the national standard GB / T 41059-2021 "Technical Requirements for Ceramic Tile Adhesives".

[0050] 3. Test Results and Analysis

[0051] The test results of this test example are shown in Table 3. This test example mainly explores the effect of the mass fractions of gypsum, aluminoferrite cement, and silicate cement added on the performance of the prepared gypsum-based tile adhesive. In control groups 1A to 3A, the performance of the water-resistant gypsum-based tile adhesives prepared in control groups 1A to 3A decreased to varying degrees due to the absence of vinyl acetate-ethylene copolymer emulsion, styrene-butadiene emulsion, and styrene-acrylic emulsion, respectively. Specifically, in control group 1A, the absence of vinyl acetate-ethylene copolymer emulsion led to a decrease in the bonding strength of the gypsum-based tile adhesive; in control group 2A, the absence of styrene-butadiene emulsion led to a decrease in the permeability of the gypsum-based tile adhesive, which in turn led to a decrease in the bonding strength; and in control group 3A, the absence of styrene-acrylic emulsion led to a decrease in the water resistance of the gypsum-based tile adhesive, which in turn led to a decrease in the bonding strength. In treatment groups 1A to 3A, as the content of vinyl acetate-ethylene copolymer emulsion in the water-resistant gypsum-based tile adhesive increased, the bonding strength of the resulting water-resistant gypsum-based tile adhesive exhibited a fluctuating trend of first increasing and then decreasing. Among them, the water-resistant gypsum-based tile adhesive prepared in treatment group 1A showed the best performance.

[0052] Table 3. Test results of Test Example 1

[0053]

[0054] Example 2

[0055] Based on the test results of Test Example 1, the mass fractions of gypsum, aluminoferrite cement, and silicate cement added in the first component affect the interaction between the prepared water-resistant gypsum-based tile adhesive and the substrate and tiles, thus affecting the bonding performance and waterproofing performance of the water-resistant gypsum-based tile adhesive between the substrate and tiles. In treatment group 1A of Example 1, the prepared water-resistant gypsum-based tile adhesive exhibited the best performance. Therefore, this example sets up treatment group 1B according to treatment group 1A of Example 1. Furthermore, the mineral admixtures (silica fume, organosilicon powder, fly ash) added to the water-resistant gypsum-based tile adhesive are used as variables in treatment groups 1B-2B and control groups 1B-2B of this example. The variables for treatment groups 1B-2B and control groups 1B-2B of this example are shown in Table 4. Except for the above differences, the operation steps for preparing the water-resistant gypsum-based tile adhesive in treatment groups 1B-2B and control groups 1B-2B of Example 2 are strictly consistent.

[0056] Table 4. Variables in treatment groups 1B-2B and control groups 1B-2B of Example 2

[0057] Processing Group 1B 5 0.1 0.2 Processing Group 2B 5 0 0 Control group 1B 0 0.1 0.2 Control group 2B 0 0 0

[0058] Control group 3B

[0059] This comparative group prepared gypsum-based tile adhesive according to the formula provided in treatment group 1B of Example 2. The difference between this comparative group and treatment group 1B of Example 2 is that this comparative group used an equal mass fraction of aluminoferrite cement instead of silicate cement when preparing gypsum-based tile adhesive. Apart from the above differences, the operation steps for preparing gypsum-based tile adhesive in this comparative group are strictly consistent with those in treatment group 1B of Example 2.

[0060] Control group 4B

[0061] This comparative group prepared gypsum-based tile adhesive according to the formula provided in treatment group 1B of Example 2. The difference between this comparative group and treatment group 1B of Example 2 is that this comparative group used silicate cement instead of aluminoferrite cement in the preparation of gypsum-based tile adhesive. Apart from the above differences, the operation steps for preparing gypsum-based tile adhesive in this comparative group are strictly consistent with those in treatment group 1B of Example 2.

[0062] Control group 5B

[0063] This comparative group prepared gypsum-based tile adhesive according to the formula provided in treatment group 1B of Example 2. The difference between this comparative group and treatment group 1B of Example 2 is that this comparative group used an equal mass ratio of silicate cement and aluminoferrite cement mixture (calculated by mass ratio, silicate cement: aluminoferrite cement = 2:1) to replace gypsum when preparing gypsum-based tile adhesive. Apart from the above differences, the operation steps for preparing gypsum-based tile adhesive in this comparative group are strictly consistent with those in treatment group 1B of Example 2.

[0064] Test Example 2

[0065] 1. Test Object

[0066] Example 2: Water-resistant gypsum-based tile adhesives prepared in each treatment group and the control group.

[0067] 2. Testing Methods

[0068] Perform the test according to the test method in Test Example 1.

[0069] 3. Test Results and Analysis

[0070] The test results for this test example are shown in Table 5. This test example mainly explores the effects of silica fume, organosilicon powder, fly ash, aluminoferrite cement, and silicate cement on the performance of the prepared water-resistant gypsum-based tile adhesive. In treatment group 2B, only silica fume was added. Compared with treatment group 1B, the water resistance of the water-resistant gypsum-based tile adhesive prepared in treatment group 2B decreased. This indicates that organosilicon powder and fly ash can affect the later-stage water resistance of the water-resistant gypsum-based tile adhesive.

[0071] In control group 1B, the absence of silica fume resulted in a significant decrease in the bonding strength and water resistance of the gypsum-based tile adhesive. Control group 2B, which did not contain silica fume, organosilicon powder, or fly ash, showed a sharp decline in the bonding strength of the gypsum-based tile adhesive both before and after water immersion. This test demonstrates that the three different mineral admixtures have a synergistic effect, enhancing the density and water resistance of the water-resistant gypsum-based tile adhesive, thereby improving its bonding strength and water resistance.

[0072] In comparison groups 3B to 5B, the strength of the gypsum-based tile adhesive decreased due to the absence of silicate cement in comparison group 3B. In comparison group 4B, the lack of aluminoferrite cement prevented the mitigation of shrinkage caused by silicate cement, leading to deformation of the gypsum-based tile adhesive and resulting in poor adhesion between the adhesive and the substrate / tile, thus reducing bond strength. In comparison group 5B, the lack of gypsum reduced compatibility between the tile adhesive and the substrate, further decreasing the adhesive strength.

[0073] Table 5. Test results of Test Case 2

[0074]

[0075]

[0076] Example 3

[0077] Based on the test results of Test Example 2, the mineral admixtures added in the first component affect the density and water resistance of the prepared water-resistant gypsum-based tile adhesive, thereby affecting the bonding performance and waterproofing performance of the water-resistant gypsum-based tile adhesive between the substrate and the tiles. In treatment group 1B of Example 2, the prepared water-resistant gypsum-based tile adhesive exhibited the best performance. Therefore, this example sets up treatment group 1C according to treatment group 1B of Example 2. Furthermore, this example uses the mass fractions of vinyl acetate-ethylene copolymer latex powder, 3mm polypropylene fiber, and wood fiber added to the water-resistant gypsum-based tile adhesive as variables to set different treatment groups. The variables for each treatment group in this example are shown in Table 6. Apart from the above differences, the operating procedures for preparing the water-resistant gypsum-based tile adhesive in each treatment group of Example 3 are strictly consistent.

[0078] Table 6. Variables used in the preparation of water-resistant gypsum-based tile adhesive for each treatment group in this embodiment.

[0079] Processing group 1C 2 3 0.2 0.5 Processing group 2C 0 5 0.2 0.5 Processing Group 3C 5 0 0.2 0.5 Processing Group 4C 2 3 0 0.7 Processing group 5C 2 3 0.7 0 Processing group 6C 2 3 0 0

[0080] Test Example 3

[0081] 1. Test Object

[0082] Example 3: Water-resistant gypsum-based tile adhesives prepared in each treatment group and the control group.

[0083] 2. Testing Methods

[0084] Perform the test according to the test method in Test Example 1.

[0085] 3. Test Results and Analysis

[0086] The test results for this test example are shown in Table 7. This test example mainly explores the effects of adding vinyl acetate-ethylene copolymer latex powder (WACKER 8031 ​​water-repellent powder, Elastane 2350 powder), 3mm polypropylene fiber, and wood fiber on the performance of the prepared water-resistant gypsum-based tile adhesive. In treatment groups 4C–6C, the absence of polypropylene fiber or wood fiber led to a decrease in the crack resistance of the prepared water-resistant gypsum-based tile adhesive; specifically, the flexible deformation of treatment groups 4C–6C decreased. In treatment groups 2C and 3C, it was found that different vinyl acetate-ethylene copolymer latex powders affected the water resistance and crack resistance of the water-resistant gypsum-based tile adhesive.

[0087] Table 7. Test results of Test Case 3

[0088]

[0089] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A water-resistant gypsum-based ceramic tile adhesive, characterized in that, The raw materials for preparing the water-resistant gypsum-based tile adhesive include a first component, a second component, and a third component; The first component, calculated by mass parts, comprises 30-45 parts gypsum, 1-5 parts aluminoferrite cement, 5-15 parts silicate cement, 50-80 parts quartz sand, 3-10 parts silica fume, 3-7 parts vinyl acetate-ethylene copolymer latex powder, 0.1-0.3 parts 3mm polypropylene fiber, 0.2-1 part wood fiber, 0.1-0.2 parts low-viscosity cellulose ether, 0.1-0.3 parts medium-viscosity cellulose, 0.1-0.3 parts magnesium aluminum silicate, 0.01-0.03 parts starch ether, 0.1-0.2 parts natural tartaric acid, and 0.2-0.5 parts polycarboxylate superplasticizer. The second component comprises 20-35 parts of vinyl acetate-ethylene copolymer emulsion, 15-35 parts of styrene-butadiene emulsion, and 10-22 parts of styrene-acrylic emulsion; The third component includes unpasteurized beer, wherein the pH of the unpasteurized beer is 3 to 3.8; Based on the mass ratio, the ratio of component 1: component 2: component 3 is 1:0.1~0.5:0.16~0.

3. The method for preparing the water-resistant gypsum-based tile adhesive includes the step of preparing a third component, wherein preparing the third component includes: diluting beer stock with water to a pH of 4.2-5.8 to obtain the third component; The mixing step also includes adding the third component to the mixed slurry obtained by mixing the first component and the second component.

2. The water-resistant gypsum-based tile adhesive as described in claim 1, characterized in that, The quartz sand has a particle size of 40-120 mesh; according to the mass fraction, in the first component, the quartz sand with a particle size of 40-70 mesh is 20-30 parts, and the quartz sand with a particle size of 70-120 mesh is 30-50 parts.

3. The water-resistant gypsum-based tile adhesive as described in claim 1, characterized in that, The vinyl acetate-ethylene copolymer latex powder includes at least one of Wacker 8031 ​​hydrophobic latex powder and Elastane 2350 latex powder.

4. The water-resistant gypsum-based tile adhesive as described in claim 1, characterized in that, According to the mass fractions, the raw materials for preparing the first component also include 0.1 to 0.2 parts of fly ash and 0.1 to 0.2 parts of organosilicon powder.

5. A method for preparing the water-resistant gypsum-based tile adhesive as described in any one of claims 1 to 4, characterized in that, The method includes the following steps: Preparation of the first component: The gypsum, the aluminoferrite cement, the silicate cement, the quartz sand, the wood fiber, and the 3mm polypropylene fiber are mixed to obtain mixed powder I. When the powder temperature of the mixed powder I is lower than 35°C, the remaining materials included in the first component are added to the mixed powder I to obtain the first component. In the above process, the mixing speed is 40~80 rpm. Preparation of the second component: The materials included in the second component are mixed, and then the resulting mixed slurry is subjected to high-speed dispersion treatment and low-speed dispersion treatment in sequence. The mixing speed of the high-speed dispersion treatment is 800~1200 rpm, and the mixing speed of the low-speed dispersion treatment is 140~160 rpm, thereby obtaining the second component; Mixing steps: Mix the first component and the second component at a mass ratio of 1:0.1~0.5, and the mixing speed is 80~100 rpm.

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