Ceramic tile adhesive based on aramid fiber anchoring structure as well as preparation method and application of ceramic tile adhesive

Abstract

The invention relates to the technical field of building materials, and discloses an aramid anchoring structure-based ceramic tile adhesive, which is prepared from the following ingredients in parts by mass: 300 to 400 parts of cement, 40 to 60 parts of stone powder, 500 to 700 parts of quartz sand, 2 to 5 parts of cellulose, 20 to 30 parts of Wacker 4115N, 20 to 30 parts of Wacker 5010N, 10 to 30 parts of metakaolin, 2 to 8 parts of aramid fibers, 0.3 to 0.7 part of starch ether and 3 to 7 parts of calcium formate. The preparation method of the ceramic tile adhesive comprises the following steps: premixing the aramid fiber and the quartz sand, primarily stirring the cement, the stone powder, the metakaolin and the quartz sand, and secondarily stirring the cellulose, Wacker 4115N, Wacker 5010N, the aramid fiber mixture, the starch ether and the calcium formate; according to the application of the tile adhesive, the tile adhesive is uniformly mixed with water, tiling is performed in time after the adhesive is scraped, and curing is performed for 24 hours at normal temperature. According to the ceramic tile adhesive based on the aramid fiber anchoring structure and the preparation method and application of the ceramic tile adhesive, the three-dimensional net-shaped anchoring structure is formed in the adhesive through the aramid fiber, the interface bonding force is enhanced, the labor and material cost is saved, and the anti-falling and anti-cracking performance is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of building materials, and in particular to a tile adhesive based on an aramid anchoring structure, a preparation method and an application thereof. Background Art

[0002] As people's material living standards improve, the quality requirements for living environment are also rising. Ceramic tiles are increasingly used as wall and floor decoration materials in people's daily lives due to their advantages such as high strength, durability and good decorativeness. Therefore, the use of tile adhesive is also increasing.

[0003] Tile glue is also called tile adhesive. Currently, the tile glue on the market is mainly cement mortar made of inorganic materials. Cement mortar has disadvantages such as low bonding strength, non-waterproofness, and large shrinkage and deformation. Traditional laying processes mainly include European standard process (leveling and ribs + thin pasting) and ordinary process. Among them, the European standard process is difficult for owners to afford due to high labor costs and complicated processes. The ordinary process has low water absorption rate of rock slabs, poor adhesion, and uneven stress, which leads to tile falling off and cracking, posing a great safety risk. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a tile adhesive based on an aramid anchoring structure, which forms a three-dimensional network anchoring structure in the colloid by aramid fibers, enhances the interfacial adhesion, significantly improves the tensile strength and shear strength, saves labor and material costs, and improves the anti-falling and anti-cracking performance, as well as its preparation method and application.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: In the first aspect, the present application provides a tile adhesive based on an aramid anchoring structure, which includes, by mass, 300-400 parts of cement, 40-60 parts of stone powder, 500-700 parts of quartz sand, 2-5 parts of cellulose, 20-30 parts of Wacker 4115N redispersible latex powder, 20-30 parts of Wacker 5010N redispersible latex powder, 10-30 parts of metakaolin, 2-8 parts of aramid fiber, 0.3-0.7 parts of starch ether, and 3-7 parts of calcium formate.

[0006] Furthermore, the cement is silicate cement with a strength grade of 42.5.

[0007] Furthermore, the mesh size of the quartz sand is 70-140 meshes.

[0008] Furthermore, the viscosity specification of the cellulose is 40000 mPa·s.

[0009] In a second aspect, the present application provides a method for preparing the above-mentioned tile adhesive based on the aramid anchoring structure, comprising the following steps: (S1) pre-mixing aramid fiber and quartz sand, wherein the mass ratio of aramid fiber to quartz sand is 1:10, to obtain an aramid fiber mixture; (S2) Cement, stone powder, metakaolin and quartz sand are added to a mixer in proportion and stirred for 3-5 minutes until the materials are evenly mixed; (S3) placing cellulose, Wacker 4115N redispersible latex powder, Wacker 5010N redispersible latex powder, the aramid fiber mixture obtained in step (S1), starch ether, and calcium formate into a blender in sequence, and stirring for 15-25 minutes until the materials are uniformly mixed; (S4) The material in the mixer is discharged into the finished product storage tank, and the finished product storage tank is transported to the packaging equipment via a conveyor belt, and the material is filled into the packaging bag to the specified weight, and the bag mouth is sealed.

[0010] In a third aspect, the present application provides an application of the above-mentioned tile adhesive based on the aramid anchoring structure, wherein the tile adhesive is evenly mixed with water to obtain an adhesive, wherein the mass ratio of the tile adhesive to water is (4-5):1.

[0011] Furthermore, the adhesive is applied using a toothed trowel, with a thickness controlled at 3-5 mm. Tiles are laid promptly after scraping the adhesive and cured at room temperature for 24 hours. The hollowing rate after 24 hours of laying is less than 5%.

[0012] Compared with the prior art, the advantages of the present invention are: 1. The tile adhesive based on the aramid anchoring structure of the present invention adds aramid fibers. The aramid fibers form a three-dimensional network structure in the colloid, which is similar to a "micro-anchor", anchoring the tiles and the adhesive layer, the adhesive layer and the base surface, and enhancing the interfacial bonding force. It is especially effective for tiles with low water absorption, such as rock slabs and vitrified tiles. The tile adhesive based on the aramid anchoring structure has a wide temperature resistance range, which can solve the problem of tile adhesive cracking in areas with severe temperature differences and avoid bonding failure caused by thermal expansion and contraction. It has strong chemical stability and can resist water vapor, acid and alkali corrosion, extending the life of tile laying. It has high strength and light weight characteristics and can significantly improve the tensile strength and shear strength without increasing the weight of the tile adhesive. By controlling the length and dosage of the aramid fibers, the flexibility and rigidity of the tile adhesive can be balanced, adapting to slight deformation of the base surface, reducing the risk of hollowing, reducing local stress concentration caused by irregular tile back patterns or uneven base surfaces, and dispersing load transfer.

[0013] 2. The preparation method of the tile adhesive based on the aramid anchoring structure of the present invention adopts a dry mixing pre-dispersion method. First, the aramid fiber and a small amount of quartz sand are pre-mixed at a mass ratio of 1:10. Then, the cement, stone powder, metakaolin and quartz sand as the main ingredients are added to the mixer for initial stirring. Then, the cellulose, Wacker 4115N redispersible latex powder, Wacker 5010N redispersible latex powder, aramid fiber premix, starch ether and calcium formate as auxiliary ingredients are added to the mixer for secondary stirring. This can avoid clumping or leakage, ensure the full integration of the main ingredients and auxiliary ingredients, and effectively improve product quality.

[0014] 3. The present invention uses tile adhesive based on aramid anchoring structure, and the base layer is simple to process, without complicated leveling and rib punching. The tile adhesive is mixed with water in proportion and stirred evenly. The mixed adhesive is evenly applied to the back of the rock slab and the base layer with a toothed scraper, kneaded and fixed, and the flatness of the rock slab is adjusted with a leveler. Wait for solidification. Compared with the existing technology, it saves labor and material costs compared with the European standard process, improves the anti-shedding and anti-cracking performance compared with the ordinary process, and is suitable for large-sized rock slabs. DETAILED DESCRIPTION

[0015] The present invention is further described in detail below with reference to specific embodiments.

[0016] In the first aspect, the present application provides a tile adhesive based on an aramid anchoring structure, which includes, by mass, 300-400 parts of cement, 40-60 parts of stone powder, 500-700 parts of quartz sand, 2-5 parts of cellulose, 20-30 parts of Wacker 4115N redispersible latex powder, 20-30 parts of Wacker 5010N redispersible latex powder, 10-30 parts of metakaolin, 2-8 parts of aramid fiber, 0.3-0.7 parts of starch ether, and 3-7 parts of calcium formate.

[0017] Furthermore, the cement is a Portland cement with a strength grade of 42.5. In a specific embodiment, the cement can be a conventional product with the trade name "black cement 425" purchased from a building material manufacturer.

[0018] Furthermore, the mesh number of the quartz sand is 70-140 mesh.

[0019] Furthermore, the viscosity specification of the cellulose is 40000 mPa·s. In a specific embodiment, the cellulose can be a conventional product purchased from a building material manufacturer under the trade name "Cellulose 4W".

[0020] Example 1 A tile adhesive based on an aramid anchoring structure includes 350 kg of cement, 50 kg of stone powder, 600 kg of quartz sand, 3 kg of cellulose, 21.53 kg of Wacker 4115N redispersible latex powder, 28.47 kg of Wacker 5010N redispersible latex powder, 20 kg of metakaolin, 2 kg of aramid fiber, 0.5 kg of starch ether, and 5 kg of calcium formate, as shown in Table 1.

[0021] Table 1 The tile adhesive based on the aramid anchoring structure in Example 1 was mixed with water at a mass ratio of 100:24, and the performance was tested according to the standard requirements of JC / T 547-2017. The test results are shown in Table 2.

[0022] Table 2 As shown in Tables 1 and 2, the tensile bond strength of the tile adhesive based on the aramid anchoring structure of Example 1 is 1.9 MPa, which meets the standard requirements; the tensile bond strength after immersion in water is 1.3 MPa, which meets the standard requirements; the tensile bond strength after thermal aging is 2.3 MPa, which meets the standard requirements; the tensile bond strength after freeze-thaw cycles is 1.9 MPa, which meets the standard requirements; the slip is 0.2 mm, which meets the standard requirements; the tensile bond strength after an extended air-standing time of ≥30 min is 0.6 MPa, which meets the standard requirements; and the lateral deformation is 3.4 mm, which meets the standard requirements. The tile adhesive based on the aramid anchoring structure can meet the performance requirements of the standard JC / T 547-2017.

[0023] This tile adhesive based on aramid anchoring structure adds aramid fibers. The aramid fibers form a three-dimensional network structure in the colloid, similar to a "micro-anchor", anchoring the tiles to the adhesive layer, the adhesive layer to the base surface, and enhancing the interfacial bonding force. It is especially effective for tiles with low water absorption, such as rock slabs and vitrified tiles. Aramid fibers have a wide temperature resistance range and can solve the problem of tile adhesive cracking in areas with drastic temperature differences, avoiding bonding failure caused by thermal expansion and contraction. They have strong chemical stability and can resist water vapor, acid and alkali corrosion, extending the life of tile laying. Their high strength and light weight characteristics can significantly improve the tensile strength and shear strength without increasing the weight of the tile adhesive. By controlling the length and dosage of aramid fibers, the flexibility and rigidity of the tile adhesive can be balanced, adapting to slight deformation of the base surface, reducing the risk of hollowing, reducing local stress concentration caused by irregular tile back patterns or uneven base surfaces, and dispersing load transfer.

[0024] In a second aspect, the present application provides a method for preparing the above-mentioned tile adhesive based on the aramid anchoring structure, comprising the following steps: (S1) pre-mixing aramid fiber and quartz sand, wherein the mass ratio of aramid fiber to quartz sand is 1:10, to obtain an aramid fiber mixture; (S2) Cement, stone powder, metakaolin and quartz sand are added to a mixer in proportion and stirred for 3-5 minutes until the materials are evenly mixed; (S3) placing cellulose, Wacker 4115N redispersible latex powder, Wacker 5010N redispersible latex powder, the aramid fiber mixture obtained in step (S1), starch ether, and calcium formate into a blender in sequence, and stirring for 15-25 minutes until the materials are uniformly mixed; (S4) The material in the mixer is discharged into the finished product storage tank, and the finished product storage tank is transported to the packaging equipment via a conveyor belt, and the material is filled into the packaging bag to the specified weight, and the bag mouth is sealed.

[0025] In a specific embodiment, the formula of the tile adhesive based on the aramid anchoring structure of Example 1 is used. The aramid fiber is first pre-mixed with a small amount of quartz sand (mass ratio of 1:10) to prevent the fibers from clumping. Then, the cement, stone powder, metakaolin, and quartz sand weighed according to the formula are put into the mixer for initial stirring for 3 minutes until the materials are evenly mixed. Then, the cellulose, Wacker 4115N redispersible latex powder, Wacker 5010N redispersible latex powder, the pre-mixed aramid fiber mixture, starch ether, and calcium formate weighed according to the formula are sequentially put into the mixer for secondary stirring for 15-25 minutes to ensure that the materials are evenly mixed. After the stirring is completed, the materials are discharged into the finished product storage tank and the stirring is turned off. At the machine outlet, spot check the material uniformity (an optional step, performed according to quality control requirements), start the packaging equipment, set the net content to 20 kg, and convey the material from the finished product storage tank to the packaging outlet via the conveyor belt. The packaging bag is automatically positioned and the material is filled to the specified weight. The filled packaging bag is sent to the ultrasonic sealing machine via the conveyor belt to complete the bag sealing; the sealed finished product is temporarily stored in the conveyor belt buffer awaiting palletizing. The robot grabs the packaging bag according to the set specifications and stacks it layer by layer onto the pallet (100 bags per pallet). After palletizing, the palletized goods are fully wrapped and fixed with transparent stretch film. The forklift transports the palletized goods to the designated area of the finished product warehouse, where they are registered and stored by batch, the incoming quantity is verified, production records are generated, and logistics delivery is connected.

[0026] The preparation method of the tile adhesive based on the aramid anchoring structure adopts a dry mixing pre-dispersion method. First, aramid fiber and a small amount of quartz sand are pre-mixed at a mass ratio of 1:10. Then, cement, stone powder, metakaolin and quartz sand as main ingredients are added into a mixer for primary mixing. Then, cellulose, Wacker 4115N redispersible latex powder, Wacker 5010N redispersible latex powder, aramid fiber premix, starch ether and calcium formate as auxiliary ingredients are added into the mixer for secondary mixing. This method can avoid agglomeration or omission of ingredients, ensure the full integration of the main ingredients and auxiliary ingredients, and effectively improve product quality.

[0027] In a third aspect, the present application provides an application of the above-mentioned tile adhesive based on the aramid anchoring structure, wherein the tile adhesive is evenly mixed with water to obtain an adhesive, wherein the mass ratio of the tile adhesive to water is (4-5):1.

[0028] Furthermore, the adhesive is applied using a toothed trowel, with a thickness controlled at 3-5 mm. Tiles are laid promptly after the adhesive is scraped off and cured at room temperature for 24 hours. The hollowing rate after 24 hours of laying is less than 5%.

[0029] In a specific implementation plan, the base layer is first treated to ensure that the base surface is flat, solid and dry (moisture content <10%). For smooth base surfaces (such as concrete or old tile base surfaces), it is necessary to roughen or apply an interface agent to enhance initial adhesion. The tile adhesive and water are mixed in a mass ratio of (4-5):1 to ensure that the aramid fiber is evenly dispersed to form a paste-like adhesive. A toothed trowel is used for construction. The thickness of the tile adhesive is controlled at 3-5mm (adjusted according to the size of the tile). After scraping the adhesive, the tiles are laid in time to avoid long open time that causes fiber dehydration and web formation. The tiles are cured at room temperature for 24 hours, avoiding vibration or stress during this period. The hollow rate is checked 24 hours after laying (target <5%), with a focus on inspecting the edges and corners.

[0030] The application of this tile adhesive based on the aramid anchoring structure is simple in base treatment and does not require complicated leveling and rib punching. The tile adhesive and water are mixed in proportion and stirred evenly. The mixed adhesive is evenly applied to the back of the rock slab and the base with a toothed scraper, kneaded and fixed, and the flatness of the rock slab is adjusted with a leveler. The process is then left to solidify. Compared with existing technologies, this method saves labor and material costs compared to European standard processes, improves anti-shedding and anti-cracking properties compared to ordinary processes, and is suitable for large-sized rock slabs.

[0031] The above is only a preferred embodiment of the present invention, and the scope of protection of the present invention is not limited to the above embodiment. For those skilled in the art, improvements and modifications obtained without departing from the technical concept of the present invention should also be considered as the scope of protection of the present invention.

Claims

1. A tile adhesive based on an aramid anchoring structure, characterized in that: Calculated by mass, it includes 300-400 parts of cement, 40-60 parts of stone powder, 500-700 parts of quartz sand, 2-5 parts of cellulose, 20-30 parts of Wacker 4115N redispersible latex powder, 20-30 parts of Wacker 5010N redispersible latex powder, 10-30 parts of metakaolin, 2-8 parts of aramid fiber, 0.3-0.7 parts of starch ether, and 3-7 parts of calcium formate.

2. The tile adhesive based on aramid anchoring structure according to claim 1, characterized in that: The cement is silicate cement with a strength grade of 42.

5.

3. The tile adhesive based on aramid anchoring structure according to claim 1, characterized in that: The mesh number of the quartz sand is 70-140 meshes.

4. The tile adhesive based on aramid anchoring structure according to claim 1, characterized in that: The viscosity specification of the cellulose is 40000 mPa·s.

5. A method for preparing a tile adhesive based on an aramid anchoring structure according to any one of claims 1 to 4, characterized in that: The following steps are involved: (S1) pre-mixing aramid fiber and quartz sand, wherein the mass ratio of aramid fiber to quartz sand is 1:10, to obtain an aramid fiber mixture; (S2) Cement, stone powder, metakaolin and quartz sand are added to a mixer in proportion and stirred for 3-5 minutes until the materials are evenly mixed; (S3) placing cellulose, Wacker 4115N redispersible latex powder, Wacker 5010N redispersible latex powder, the aramid fiber mixture obtained in step (S1), starch ether, and calcium formate into a blender in sequence, and stirring for 15-25 minutes until the materials are uniformly mixed; (S4) The material in the mixer is discharged into the finished product storage tank, and the finished product storage tank is transported to the packaging equipment via a conveyor belt, and the material is filled into the packaging bag to the specified weight, and the bag mouth is sealed.

6. A use of a tile adhesive based on an aramid anchoring structure according to any one of claims 1 to 4, characterized in that: The tile adhesive and water are evenly mixed to obtain an adhesive, wherein the mass ratio of the tile adhesive to the water is (4-5):

1.

7. The use of the tile adhesive based on the aramid anchoring structure according to claim 6, characterized in that: The adhesive is applied with a toothed trowel, with a thickness controlled at 3-5 mm. Tiles are laid promptly after the adhesive is scraped and cured at room temperature for 24 hours. The hollowing rate after 24 hours of laying is less than 5%.

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