Cement-based light anti-crack tile adhesive and manufacturing method thereof

Abstract

The invention provides a cement-based light anti-crack tile adhesive and a manufacturing method thereof. The cement-based light anti-crack ceramic tile adhesive is prepared from the following materials in parts by weight: 420 to 440 parts of cement, 70 to 80 parts of glass beads, 360 to 390 parts of aggregate, 40 to 60 parts of filler, 13 to 17 parts of dispersible latex powder, 4 to 6 parts of water-retaining agent, 4 to 6 parts of early strength agent, 30 to 50 parts of diatomite and 2.5 to 3.5 parts of anti-crack fiber. According to the cement-based light anti-crack ceramic tile adhesive disclosed by the invention, the specific vitrified microbeads are added, so that not only is the bonding strength of the ceramic tile adhesive enhanced, but also a better heat preservation effect is realized.

Description

Technical Field

[0001] The present application relates to the field of building materials, and in particular to a cement-based lightweight anti-cracking tile adhesive and a manufacturing method thereof. Background Art

[0002] Cement-based lightweight anti-cracking tile adhesive is mainly used for pasting ceramic tiles, tiles, floor tiles and other decorative materials. It is widely used in interior and exterior walls, floors, bathrooms, kitchens, and building decoration places. Its main features are high bonding strength, water resistance, freeze-thaw resistance, good aging resistance and convenient construction. It is an ideal adhesive material.

[0003] At present, in order to enhance the thermal insulation performance of cement-based lightweight anti-cracking tile adhesive, it is usually necessary to add vitrified microspheres. However, the bonding strength and thermal conductivity of existing tile adhesives containing conventional vitrified microspheres will be affected.

[0004] Therefore, there is a need for a cement-based lightweight anti-cracking tile adhesive with enhanced performance and a method for making the same. Summary of the invention

[0005] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of protection of this application.

[0006] On the one hand, the present application provides a cement-based lightweight anti-cracking tile adhesive, which is prepared from the following materials. In parts by weight, the materials include 420-440 parts of cement, 70-80 parts of vitrified microspheres, 360-390 parts of aggregates, 40-60 parts of fillers, 13-17 parts of dispersible latex powder, 4-6 parts of water-retaining agent, 4-6 parts of early strength agent, 30-50 parts of diatomaceous earth and 2.5-3.5 parts of anti-cracking fibers.

[0007] In one embodiment, the material includes 430 parts by weight of cement, 372 parts by weight of aggregate, 70 parts by weight of vitrified microspheres, 50 parts by weight of filler, 15 parts by weight of dispersible latex powder, 5 parts by weight of early strength agent, 5 parts by weight of water retention agent, 50 parts by weight of diatomaceous earth and 3 parts by weight of anti-cracking fiber.

[0008] In one embodiment, the material includes 440 parts by weight of cement, 366 parts by weight of aggregate, 80 parts by weight of vitrified microspheres, 40 parts by weight of filler, 16 parts by weight of dispersible latex powder, 5 parts by weight of early strength agent, 5 parts by weight of water retention agent, 45 parts by weight of diatomaceous earth and 3 parts by weight of anti-cracking fiber.

[0009] In one embodiment, the vitrified microspheres include 70-75 parts by weight of SiO2, 10-15 parts by weight of Na2O, 7-11 parts by weight of CaO, 0.5-5 parts by weight of Al2O3, 0-5 parts by weight of MgO, and 0-4 parts by weight of K2O.

[0010] In one embodiment, the particle size of the vitrified microspheres is 0.1-0.3 mm.

[0011] In one embodiment, the aggregate is light sand with a particle size of 40-140 mesh.

[0012] In one embodiment, the filler is heavy calcium powder with a particle size of 250-325 mesh.

[0013] In one embodiment, the dispersible latex powder is one or more of vinyl acetate, ethylene and higher fatty acid vinyl ester ternary copolymer dispersible latex powder; vinyl acetate and higher fatty acid vinyl ester copolymer dispersible latex powder; vinyl acetate, acrylate and higher fatty acid vinyl ester ternary copolymer dispersible latex powder.

[0014] In one embodiment, the anti-cracking fiber is wood fiber.

[0015] In one embodiment, the cement is one or more of gray cement and white cement.

[0016] In one embodiment, the early strength agent is one or more of lithium carbonate, calcium formate and sodium sulfate.

[0017] In one embodiment, the water retaining agent is cellulose ether; optionally, the viscosity of the cellulose ether is 10000-100000 mPa·s.

[0018] In one embodiment, the cellulose ether is selected from one or more of methyl cellulose ether, hydroxypropyl methyl cellulose ether and carboxymethyl cellulose ether.

[0019] In one embodiment, the thermal conductivity of the cement-based lightweight anti-cracking tile adhesive is in the range of 0.44-0.48 W / (m·K).

[0020] On the other hand, the present application provides a method for manufacturing the above-mentioned cement-based lightweight anti-cracking tile adhesive, comprising the following steps: The filler, the vitrified microspheres, the dispersible latex powder, the early strength agent, the water retaining agent, the diatomaceous earth and the anti-cracking fiber are mixed and stirred uniformly to obtain a premix; The cement, aggregate and the premix are mixed and stirred evenly to obtain the cement-based lightweight anti-cracking tile adhesive.

[0021] The cement-based lightweight anti-cracking tile adhesive of the present application not only enhances the bonding strength of the tile adhesive but also has a reduced thermal conductivity by introducing specific vitrified microbeads and forming a specific combination with diatomaceous earth, wood fiber and other ingredients, thereby achieving a better thermal insulation effect and being more suitable for places requiring thermal insulation, such as exterior wall insulation, floor insulation, etc.

[0022] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by implementing the present application. Other advantages of the present application can be realized and obtained by the schemes described in the description. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present application more clear, the embodiments of the present application are described in detail below. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0024] Unless otherwise specified, the materials used in the following examples and comparative examples are all commercially available.

[0025] The cement used in the following examples and comparative examples is purchased from Anhui Conch Cement Co., Ltd. The main component of the cement is calcium silicate, specification P.II52.5, loss on ignition is less than or equal to 3.5%, sulfur trioxide is less than or equal to 3.5%, magnesium oxide is less than or equal to 5.0%, chloride ion is less than or equal to 0.06%, and specific surface area is greater than or equal to 300 m 2 / kg.

[0026] The aggregate used is lightweight sand purchased from Ningbo Yizhu New Building Materials Technology Co., Ltd. The particle size of the lightweight sand is 30-140 mesh (corresponding to 0.109-0.55 mm).

[0027] The filler used is heavy calcium powder purchased from Zhejiang Qintang Calcium Industry Co., Ltd. The particle size of the heavy calcium powder is 250-325 meshes and the moisture content is less than or equal to 0.01%.

[0028] The vitrified microspheres used in each embodiment are Poraver® purchased from Dennert Poraver of Germany, with a particle size of 0.1-0.3 mm and a bulk density of 400±60 kg / m 3 The vitrified microspheres include 70-75 parts by weight of SiO2, 10-15 parts by weight of Na2O, 7-11 parts by weight of CaO, 0.5-5 parts by weight of Al2O3, 0-5 parts by weight of MgO, and 0-4 parts by weight of K2O (according to DIN EN ISO 12677 by X-ray fluorescence (XRF) at 105 C measured in dry state).

[0029] The dispersible polymer powder used is purchased from Wacker Chemicals (Nanjing) Co., Ltd. The specification of the dispersible polymer powder is 4115N, the ash content is 13%-14.5.0%, and the volume density is 490-590 g / L.

[0030] The water-retaining agent used is hydroxypropyl methylcellulose ether purchased from Shanghai Huiguang Fine Chemical Co., Ltd. The model of the hydroxypropyl methylcellulose ether is GMC1163, the viscosity is 40000-50000 mPa·s, and the water content is ≤8%.

[0031] The early strength agent used is calcium formate purchased from Shanghai Dino Chemical Co., Ltd. The content of calcium formate is greater than or equal to 98%, the total calcium content is greater than or equal to 30%, the moisture content is less than or equal to 0.5%, and the pH value is 6.5-8.0.

[0032] The diatomaceous earth used was purchased from Jilin Jiapeng Diatomaceous Earth.

[0033] The anti-cracking fiber used is wood fiber purchased from Shanghai Ougong Engineering Materials Co., Ltd. The model of the wood fiber is H-500, and the fiber length is 500 microns.

[0034] The vitrified microspheres used in the comparative example were purchased from Puyang Changshun Insulation Technology Co., Ltd., and had an average particle size of 0.35-0.5 mm.

[0035] Example 1 50 parts by weight of heavy calcium powder, 70 parts by weight of vitrified microspheres Poraver®, 15 parts by weight of dispersible latex powder, 5 parts by weight of hydroxypropyl methylcellulose ether, 5 parts by weight of 250-mesh calcium formate, 3 parts by weight of wood fiber and 50 parts by weight of diatomaceous earth are sequentially added into a mixer for premixing, and mixed and stirred evenly to obtain a premix; 430 parts by weight of cement, 372 parts by weight of light sand and 198 parts by weight of premix are sequentially added into a mixer and mixed, and after mixing and stirring evenly, a cement-based light anti-cracking tile adhesive product is obtained.

[0036] Example 2 40 parts by weight of heavy calcium powder, 80 parts by weight of vitrified microspheres Poraver®, 16 parts by weight of dispersible latex powder, 5 parts by weight of hydroxypropyl methylcellulose ether, 5 parts by weight of 250-mesh calcium formate, 3 parts by weight of wood fiber and 45 parts by weight of diatomaceous earth are sequentially added into a mixer for premixing, and mixed and stirred evenly to obtain a premix; 440 parts by weight of cement, 366 parts by weight of light sand and 198 parts by weight of premix are sequentially added into a mixer and mixed, and after mixing and stirring evenly, a cement-based light anti-cracking tile adhesive product is obtained.

[0037] Comparative Example 1 50 parts by weight of heavy calcium powder, 70 parts by weight of commercially available vitrified microspheres (non-closed-cell), 15 parts by weight of dispersible latex powder, 5 parts by weight of hydroxypropyl methylcellulose ether, 5 parts by weight of 250-mesh calcium formate, 3 parts by weight of wood fiber and 50 parts by weight of diatomaceous earth are sequentially added into a mixer for premixing, and mixed and stirred evenly to obtain a premix; 430 parts by weight of cement, 372 parts by weight of light sand and 198 parts by weight of premix are sequentially added into a mixer and mixed, and after mixing and stirring evenly, a cement-based light anti-cracking tile adhesive product is obtained.

[0038] Comparative Example 2 40 parts by weight of heavy calcium powder, 80 parts by weight of commercially available vitrified microspheres (closed-cell), 16 parts by weight of dispersible latex powder, 5 parts by weight of hydroxypropyl methylcellulose ether, 5 parts by weight of 250-mesh calcium formate, 3 parts by weight of wood fiber and 45 parts by weight of diatomaceous earth are sequentially added into a mixer for premixing, and mixed and stirred evenly to obtain a premix; 440 parts by weight of cement, 366 parts by weight of light sand and 198 parts by weight of premix are sequentially added into a mixer and mixed, and after mixing and stirring evenly, a cement-based light anti-cracking tile adhesive product is obtained.

[0039] Performance Testing The powder of the cement-based lightweight anti-cracking tile adhesive prepared in each embodiment and each comparative example was mixed with water at a mass ratio of 1:0.23, and the mixture was evenly mixed before testing. The test standard is the Chinese building materials industry standard JC / T 547-2017 "Ceramic Tile Adhesive". The test results are shown in Table 1 below.

[0040] Table 1

[0041] From the results in Table 1, it can be seen that the physical properties of the cement-based lightweight anti-cracking tile adhesive of the present application all meet the technical requirements for C1 products in JC / T547-2017; on the contrary, the water immersion strength of the tile adhesive of the comparative example including conventional commercially available vitrified microspheres does not meet the technical requirements for C1 products, while the tile adhesive of the present application can make the water immersion strength meet the standard.

[0042] In addition, the thermal conductivity of the cement-based lightweight anti-cracking tile adhesives prepared in each embodiment and each comparative example was measured, and the thermal conductivity of comparative example 1 was 0.65 W / (m·K) and that of comparative example 2 was 0.58 W / (m·K); on the contrary, that of embodiment 1 was 0.45 W / (m·K) and that of embodiment 2 was 0.47 W / (m·K). It can be seen that the thermal conductivity of the cement-based lightweight anti-cracking tile adhesives using specific vitrified microspheres in embodiments 1 and 2 of the present application can be reduced to the range of 0.44-0.48 W / (m·K), thereby achieving a good thermal insulation effect.

[0043] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Those skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A cement-based lightweight anti-cracking tile adhesive, characterized in that: The cement-based lightweight anti-cracking tile adhesive is prepared from the following materials, which include, by weight, 420-440 parts of cement, 70-80 parts of vitrified microspheres, 360-390 parts of aggregates, 40-60 parts of fillers, 13-17 parts of dispersible latex powders, 4-6 parts of water retaining agents, 4-6 parts of early strength agents, 30-50 parts of diatomaceous earth and 2.5-3.5 parts of anti-cracking fibers.

2. The cement-based lightweight anti-cracking tile adhesive according to claim 1, wherein the material includes 430 parts by weight of cement, 372 parts by weight of aggregate, 70 parts by weight of vitrified microspheres, 50 parts by weight of filler, 15 parts by weight of dispersible latex powder, 5 parts by weight of early strength agent, 5 parts by weight of water retaining agent, 50 parts by weight of diatomaceous earth and 3 parts by weight of anti-cracking fiber.

3. The cement-based lightweight anti-cracking tile adhesive according to claim 1, wherein the material includes 440 parts by weight of cement, 366 parts by weight of aggregate, 80 parts by weight of vitrified microspheres, 40 parts by weight of filler, 16 parts by weight of dispersible latex powder, 5 parts by weight of early strength agent, 5 parts by weight of water retaining agent, 45 parts by weight of diatomaceous earth and 3 parts by weight of anti-cracking fiber.

4. The cement-based lightweight anti-cracking tile adhesive according to any one of claims 1 to 3, wherein the vitrified microspheres comprise 70-75 parts by weight of SiO2, 10-15 parts by weight of Na2O, 7-11 parts by weight of CaO, 0.5-5 parts by weight of Al2O3, 0-5 parts by weight of MgO, and 0-4 parts by weight of K2O; and / or, The particle size of the vitrified microspheres is 0.1-0.3 mm.

5. The cement-based lightweight anti-cracking tile adhesive according to any one of claims 1 to 3, wherein the aggregate is lightweight sand with a particle size of 40-140 meshes; and / or, The filler is heavy calcium powder with a particle size of 250-325 mesh; and / or The early strength agent is one or more of lithium carbonate, calcium formate and sodium sulfate.

6. The cement-based lightweight anti-cracking tile adhesive according to any one of claims 1 to 3, wherein the dispersible latex powder is one or more of a ternary copolymer dispersible latex powder of vinyl acetate, ethylene and higher fatty acid vinyl ester; a dispersible latex powder of a copolymer of vinyl acetate and higher fatty acid vinyl ester; a ternary copolymer dispersible latex powder of vinyl acetate, acrylate and higher fatty acid vinyl ester; and / or, The anti-cracking fiber is wood fiber; and / or, The cement is one or more of gray cement and white cement.

7. The cement-based lightweight anti-cracking tile adhesive according to any one of claims 1 to 3, wherein the water retaining agent is cellulose ether; optionally, the viscosity of the cellulose ether is 10000-100000 mPa·s.

8. The cement-based lightweight anti-cracking tile adhesive according to claim 7, wherein the cellulose ether is selected from one or more of methyl cellulose ether, hydroxypropyl methyl cellulose ether and carboxymethyl cellulose ether.

9. The cement-based lightweight anti-cracking tile adhesive according to any one of claims 1 to 3, wherein the thermal conductivity of the cement-based lightweight anti-cracking tile adhesive is in the range of 0.44-0.48 W / (m·K).

10. A method for manufacturing a cement-based lightweight anti-cracking tile adhesive according to any one of claims 1 to 9, characterized in that: The steps include: The filler, the vitrified microspheres, the dispersible latex powder, the early strength agent, the water retaining agent, the diatomaceous earth and the anti-cracking fiber are mixed and stirred uniformly to obtain a premix; The cement, aggregate and the premix are mixed and stirred evenly to obtain the cement-based lightweight anti-cracking tile adhesive.

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