Ceramic tile adhesive, its preparation method and application

Abstract

The application provides a ceramic tile glue and a preparation method and application thereof, and belongs to the technical field of building materials, wherein the ceramic tile glue comprises cement 20-40 parts by mass, anhydrous gypsum 30-50 parts by mass, beta gypsum 20-25 parts by mass, an activator 4-6 parts by mass, a retarder 0.5-2 parts by mass, a water-retaining agent 0.5-2 parts by mass and a crosslinking agent 2-6 parts by mass; and the activator comprises calcium oxide and alum. The ceramic tile glue prepared by using cement, anhydrous gypsum, beta gypsum, an activator and a retarder as base materials can keep a high adhesive tensile strength while being rapidly solidified, and can meet actual construction requirements.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of building materials, and particularly relates to a ceramic tile adhesive and a preparation method and application thereof. BACKGROUND

[0002] The ceramic tile adhesive is also called ceramic tile adhesive, and is mainly used for sticking ceramic tiles, face tiles, floor tiles and other decorative materials, and is widely used for the decoration of inner and outer walls, floors, bathrooms, kitchens and other building decoration places.

[0003] Most of the traditional ceramic tile adhesives in China are ordinary mortars with cement as the main adhesive component. However, the general adhesive mortar has great defects, such as too large brittleness and insufficient flexibility, high compressive strength, low bending strength and adhesive strength, high elastic modulus and poor deformation capacity. The cement-based adhesive material can obtain good performance through polymer modification, but the existing polymer type ceramic tile adhesive has a long curing time, which is not conducive to the construction of construction personnel and reduces the work efficiency. The addition of a quick-setting agent and other additives in the raw materials ignores the adhesive strength, and the quality cannot be guaranteed under the condition of quick setting, resulting in unqualified adhesive strength and flexibility, poor weather resistance, easy cracking, and subsequent hollowing, leading to falling off.

[0004] Therefore, it is urgent to develop a ceramic tile adhesive with high adhesive strength and moderate hardening speed to meet the requirements of consumers for the ceramic tile bonding strength and sticking construction speed. SUMMARY

[0005] In view of the technical problems in the background art, the application provides a ceramic tile adhesive and a preparation method and application thereof, aiming to solve the technical problems of insufficient strength, slow hardening speed and long drying period of the existing ceramic tile adhesive.

[0006] In a first aspect, the application provides a ceramic tile adhesive, which comprises, by mass fraction, cement 20-40 parts, anhydrous gypsum 30-50 parts, beta gypsum 20-25 parts, an activator 4-6 parts, a retarder 0.5-2 parts, a water retaining agent 0.5-2 parts and a crosslinking agent 2-6 parts; wherein the activator comprises calcium oxide and alum.

[0007] In the technical scheme of the application, the anhydrous gypsum, beta gypsum and cement are compounded as a cementing system to improve the overall strength of the ceramic tile adhesive. At the same time, the calcium oxide and alum are selected as the activator to activate the anhydrous gypsum, and the setting speed can be adjusted during the hydration reaction, so that the ceramic tile adhesive with high strength and controllable hardening time is obtained.

[0008] In some embodiments, the mass ratio of calcium oxide to alum is (1-5):(1-5).

[0009] In the embodiment, the amount of calcium oxide and alum will affect the hydration rate of anhydrous gypsum, thereby affecting the initial and final setting time of the ceramic tile glue. By controlling the amount of calcium oxide and alum within a reasonable range, the initial and final setting time of the ceramic tile glue can be adjusted. If the amount of calcium oxide is too much, the initial and final setting time of the ceramic tile glue will be shortened, which will lead to too fast hardening speed of the ceramic tile glue, resulting in poor adhesion between the ceramic tile glue and the ceramic tile or the base surface, and affecting the quality and durability of the paving. If the amount of calcium oxide is too little, the final setting time of the ceramic tile glue will be increased, affecting the construction efficiency. If the amount of alum is too much, the initial setting time of the ceramic tile glue will be shortened. If the amount of alum is too little, the initial and final setting time of the ceramic tile glue will be increased, resulting in prolonged construction time and affecting the construction efficiency.

[0010] In some embodiments, the mass ratio of calcium oxide to alum is 2:3.

[0011] In the embodiment, by controlling the mass ratio of calcium oxide to alum in the ceramic tile glue to be 2:3, a ceramic tile glue with appropriate initial and final setting time can be obtained. When using the ceramic tile glue, on the one hand, the construction efficiency can be improved, and on the other hand, the ceramic tile glue has better adhesion strength.

[0012] In some embodiments, the cement is one or more of sulphoaluminate cement, Portland cement, and aluminate cement.

[0013] In the embodiment, by compounding anhydrous gypsum with the above-mentioned cement, a ceramic tile glue with high strength and better hardening time can be obtained.

[0014] In some embodiments, the anhydrous gypsum is type II anhydrous gypsum, and the mesh number is 600-1300.

[0015] According to the different hydration activities of anhydrous gypsum, anhydrous gypsum can be divided into type I, type II and type III. Type I anhydrous gypsum only exists above 1180℃, type III anhydrous gypsum is easy to absorb steam in the air and convert into β-hemihydrate gypsum, and type II anhydrous gypsum has higher strength and hardness than hemihydrate gypsum. In the embodiment, the cementing system formed by compounding type II anhydrous gypsum with cement has better strength. At the same time, the particle size of anhydrous gypsum will affect the excitation effect of the excitation agent. If the particle size of anhydrous gypsum is too small, the hydration reaction will be too fast, and the crystal obtained after hydration reaction will be small, which will increase the water consumption of standard consistency slurry, resulting in larger void ratio of the hardened ceramic tile glue, and thus the strength will be decreased. If the particle size of anhydrous gypsum is too large, the hydration reaction will be slow, which will easily lead to the existence of unhydrated anhydrous gypsum in the ceramic tile glue. The hydration of the residual anhydrous gypsum in the later stage of the hardening of the ceramic tile glue will induce the expansion and cracking of the ceramic tile glue, and thus affect the long-term performance of the ceramic tile glue.

[0016] In some embodiments, the retarder is a protein-based retarder; and / or, the water-retaining agent is a cellulose ether-based compound, and / or, the cross-linking agent is one or more of a silane coupling agent, a titanate coupling agent.

[0017] In this embodiment, the retarder can slow down the hardening speed of the cement and the anhydrous gypsum, so that the operation time is more sufficient during construction, the water-retaining agent can promote the complete hydration of the anhydrous gypsum, and the cross-linking agent can make the anhydrous gypsum fully combined with the cement and other additives, so that the alkali and salt cannot migrate to the surface with the moisture, and the alkali return phenomenon is reduced.

[0018] In some embodiments, the tile glue includes cement 40 parts, anhydrous gypsum 50 parts, β gypsum 25 parts, activator 5 parts, retarder 1.25 parts, water-retaining agent 1.25 parts, and cross-linking agent 3.5 parts.

[0019] In this embodiment, by controlling the mass ratio of cement, anhydrous gypsum, β gypsum, activator, retarder, water-retaining agent, and cross-linking agent to be 40:50:25:5:1.25:1.25:3.5, the tile glue can obtain better strength and more suitable initial and final setting time.

[0020] In a second aspect, the embodiments of the present application provide a preparation method of the tile glue according to the first aspect, including the following steps:

[0021] Mixing the anhydrous gypsum, β gypsum, activator, retarder, water-retaining agent, and cross-linking agent uniformly to obtain a mixture;

[0022] Mixing the mixture with the cement uniformly to obtain the tile glue.

[0023] In the technical solution of the embodiments of the present application, the anhydrous gypsum and β gypsum are first mixed with the activator and other additives to obtain a mixture, wherein the activator in the mixture can activate the activity of the anhydrous gypsum to make it have the gelation property, and then the mixture is mixed with the cement, and the activated anhydrous gypsum contained in the mixture can form anhydrous gypsum-cement double-glued material with the cement, which has the effects of adjusting the hardening speed of the tile glue, improving the durability of the tile glue, and enhancing the bonding force of the tile glue with the tile.

[0024] In a third aspect, the embodiments of the present application provide an application of the tile glue according to the first aspect, including: uniformly mixing the tile glue with water to obtain a non-particulate paste, and then performing tile pasting; wherein the mass ratio of the tile glue to water is 1: (0.2-0.6).

[0025] In the technical scheme of the embodiment of the present application, the ceramic tile adhesive is mixed with water before being used for ceramic tile sticking, so that the ceramic tile adhesive has the characteristics of strong adhesion and high construction efficiency. By controlling the amount of the ceramic tile adhesive and water within a reasonable range, the consistency and fluidity of the mixture during mixing are ensured, so that the ceramic tile adhesive can be well combined with the ceramic tile and the base surface during construction, and can bear the weight of the ceramic tile without flowing or collapsing before initial setting. If the amount of water is too large, the fluidity is too high, and the ceramic tile is not easy to combine with the base surface, so that the adhesion effect cannot be good. If the amount of water is too low, the viscosity is large, and the ceramic tile adhesive may not be uniform during the hardening process, which affects the performance and construction quality of the ceramic tile adhesive.

[0026] In some embodiments, the initial setting time of the ceramic tile adhesive during application is 5-30 min, the final setting time is ≤180 min, the original tensile bonding strength is 1.2-1.4 MPa, the tensile bonding strength after immersion is 0.8-1.0 MPa, the tensile bonding strength after heat aging is 1.1-1.3 MPa, the tensile bonding strength after freeze-thaw cycles is 1.0-1.2 MPa, the tensile bonding strength after 20 min of air setting is 0.6-0.85 MPa, and the 300g ceramic tile 30 min sliding distance is 0.15-0.25 mm.

[0027] In this embodiment, the ceramic tile adhesive as described in the first aspect is used for ceramic tile sticking, so that the ceramic tile adhesive has a suitable setting time and can achieve a firm sticking effect.

[0028] The above description is only a summary of the technical scheme of the present application. In order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the specification, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. DETAILED DESCRIPTION

[0029] The embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0031] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly specified and limited.

[0032] Reference herein to "embodiments" means that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily a separate or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0033] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after it.

[0034] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0035] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0036] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0037] The tile adhesive in the prior art has qualified strength but a long setting time, which leads to displacement or transverse deformation during tile paving, and thus the tiles need to be re-paved, which is not conducive to the construction of construction personnel and reduces work efficiency. However, the addition of a rapid setting agent and other additives to the raw materials ignores the adhesive strength, and the quality cannot be guaranteed under the condition of rapid setting, leading to unqualified adhesive strength and flexibility and poor weather resistance.

[0038] To solve the technical problems of insufficient adhesive strength and slow hardening speed of the existing tile adhesive, the present application provides a tile adhesive and a preparation method and application thereof. The tile adhesive is prepared by using anhydrous gypsum, β-gypsum and cement as adhesive materials, which can not only form a solid adhesive layer but also reduce the initial and final setting times, thereby improving the adhesive strength of the tile and the substrate and improving the construction efficiency.

[0039] In a first aspect, the present application provides a tile adhesive, which comprises, by mass fraction, cement 20-40 parts, anhydrous gypsum 30-50 parts, β-gypsum 20-25 parts, an activator 4-6 parts, a retarder 0.5-2 parts, a water-retaining agent 0.5-2 parts and a crosslinking agent 2-6 parts; wherein the activator comprises calcium oxide and alum.

[0040] In the technical solution of the present application, anhydrous gypsum, β-gypsum and cement are used as a cementing system to improve the overall strength of the tile adhesive. At the same time, calcium oxide and alum are used as activators to activate the anhydrous gypsum, so that the setting speed can be adjusted during the hydration reaction, thereby obtaining a tile adhesive with high strength and controllable hardening time. If the amounts of cement and anhydrous gypsum are too much, the hydration reaction speed will be slowed down, thereby increasing the initial and final setting times of the tile adhesive. If the amounts of cement and anhydrous gypsum are too little, the hydration reaction speed will be accelerated, leading to a shortened initial setting time and an insufficient construction operation time. At the same time, β-gypsum also has an activating effect on anhydrous gypsum. If the amount of β-gypsum is too much, the hydration speed of anhydrous gypsum will be accelerated, thereby shortening the initial setting time of the tile adhesive. If the amount of β-gypsum is too little, the hydration reaction speed of anhydrous gypsum will be too slow, leading to an increased initial setting time of the tile adhesive. If the amount of the activator is too much, the hydration reaction speed of anhydrous gypsum will be too fast, thereby shortening the initial and final setting times. If the amount of the activator is too little, the hydration reaction of anhydrous gypsum cannot be effectively promoted, which will increase the initial and final setting times of the tile adhesive and affect the construction efficiency.

[0041] Further, in some embodiments, the mass ratio of calcium oxide to alum is (1-5):(1-5).

[0042] In the technical scheme of the embodiment of the present application, the amount of calcium oxide and alum will affect the hydration rate of anhydrous gypsum, and then affect the initial and final setting time of the ceramic tile glue. By controlling the amount of calcium oxide and alum within a reasonable range, the initial and final setting time of the ceramic tile glue can be regulated. If the amount of calcium oxide is too much, the initial and final setting time of the ceramic tile glue will be shortened, which will lead to too fast hardening speed of the ceramic tile glue, resulting in poor adhesion between the ceramic tile glue and the ceramic tile or the base surface, and then affecting the quality and durability of the paving. If the amount of calcium oxide is too little, the final setting time of the ceramic tile glue will be increased, affecting the construction efficiency. If the amount of alum is too much, the initial setting time of the ceramic tile glue will be shortened. If the amount of alum is too little, the initial and final setting time of the ceramic tile glue will be increased, resulting in prolonged construction time and affecting the construction efficiency. The mass ratio of calcium oxide to alum can be 1:1, 1:2, 1:3, 1:4, 1:5, 2:1, 2:3, 3:4 or other ratios within the range.

[0043] Further, in some embodiments, the mass ratio of calcium oxide to alum is 2:3.

[0044] In the technical scheme of the embodiment of the present application, by controlling the mass ratio of calcium oxide to alum in the ceramic tile glue to be 2:3, ceramic tile glue with appropriate initial and final setting time can be obtained, and when the ceramic tile glue is used, on the one hand, the construction efficiency can be improved, and on the other hand, the ceramic tile glue has better adhesion strength.

[0045] Further, in some embodiments, the cement is one or more of sulphoaluminate cement, Portland cement and aluminate cement.

[0046] In the technical scheme of the embodiment of the present application, by compounding anhydrous gypsum with the above cement, ceramic tile glue with high strength and better hardening time can be obtained.

[0047] Further, in some embodiments, the anhydrous gypsum is type II anhydrous gypsum, and the mesh number is 600-1300.

[0048] According to the hydration activity of anhydrite, anhydrite can be divided into type I, type II and type III, wherein type I anhydrite only exists above 1180℃, type III anhydrite is easy to be converted into β-hemihydrate gypsum by adsorbing steam in the air, and type II anhydrite has higher strength and hardness than hemihydrate gypsum. In the technical scheme of the embodiment of the present application, the cementitious system formed by compounding type II anhydrite with cement has better strength. Meanwhile, the particle size of anhydrite will affect the activation effect of the activator on the anhydrite. If the particle size of the anhydrite is too small, the speed of the hydration reaction will be too fast, and the crystal obtained after the hydration reaction is small in size, so the water amount for standard consistency of the slurry needs to be increased, which will result in a larger porosity of the ceramic tile glue after the ceramic tile glue is hardened, and thus the strength will be reduced. If the particle size of the anhydrite is too large, the speed of the hydration reaction will be slow, and thus unhydrated anhydrite will exist in the ceramic tile glue, and the residual anhydrite will be hydrated in the later stage of the hardening of the ceramic tile glue, which will induce the expansion and cracking of the ceramic tile glue, and thus the long-term performance of the ceramic tile glue will be affected.

[0049] Further, in some embodiments, the retarder is a protein-based retarder; and / or, the water-retaining agent is a cellulose ether compound, and / or, the crosslinking agent is one or more of a silane coupling agent and a titanate coupling agent.

[0050] In the technical scheme of the embodiment of the present application, the retarder can slow down the hardening speed of the cement and the anhydrite, so that the operation time is more sufficient during construction, the water-retaining agent can promote the complete hydration of the anhydrite, and the crosslinking agent can make the anhydrite, the cement and other additives fully combined, so that the alkali and the salt cannot migrate to the surface with the water, and the alkali return phenomenon is reduced.

[0051] Further, in some embodiments, the ceramic tile glue comprises cement 40 parts, anhydrite 50 parts, β-gypsum 25 parts, activator 5 parts, retarder 1.25 parts, water-retaining agent 1.25 parts, and crosslinking agent 3.5 parts.

[0052] In the technical scheme of the embodiment of the present application, by controlling the mass ratio of the cement, the anhydrite, the β-gypsum, the activator, the retarder, the water-retaining agent and the crosslinking agent to be 40:50:25:5:1.25:1.25:3.5, the ceramic tile glue can have better strength and more suitable initial and final setting time.

[0053] In a second aspect, the embodiment of the present application provides a preparation method of the ceramic tile glue as described in the first aspect, which comprises the following steps:

[0054] Mixing the anhydrite, the β-gypsum, the activator, the retarder, the water-retaining agent and the crosslinking agent uniformly to obtain a mixture;

[0055] Mixing the mixture with the cement uniformly to obtain the ceramic tile glue.

[0056] In the technical scheme of the embodiment of the present application, first, anhydrite, beta gypsum and an activator and other additives are mixed to obtain a mixture, wherein the activator in the mixture can activate the activity of the anhydrite to make it have a gelation property, and then the mixture is mixed with cement, and the activated anhydrite contained in the mixture can form an anhydrite-cement double-glued material with the cement, which has the effects of adjusting the hardening speed of the tile glue, improving the durability, and enhancing the bonding force of the tile glue with the tile.

[0057] In a third aspect, the embodiment of the present application provides a method for applying the tile glue as described in the first aspect, comprising: uniformly mixing the tile glue with water to obtain a particle-free paste, and then performing tile pasting; wherein the mass ratio of the tile glue to water is 1: (0.2-0.6).

[0058] In the technical scheme of the embodiment of the present application, the tile glue is mixed with water and then used for tile pasting, so that the tile glue has the characteristics of strong bonding force and high construction efficiency. By controlling the amount of the tile glue and water within a reasonable range, the consistency and fluidity of the mixture during mixing are ensured, so that the tile glue can be well combined with the tile and the base surface during construction, and can bear the weight of the tile without flowing or collapsing before initial setting. If the amount of water is too large, the fluidity is too high, which makes it difficult for the tile to be combined with the base surface, and the bonding effect is not good. If the amount of water is too low, the viscosity is large, which may cause unevenness of the tile glue during the hardening process, affecting the performance and construction quality of the tile glue. The mass ratio of the tile glue to water can be 1:0.2, 1:0.3, 1:0.4, 1:0.5, 1:0.6 or other ratios within the range.

[0059] Further, in some embodiments, the initial setting time of the tile glue during application is 5-30 min, the final setting time is ≤180 min, the original tensile bonding strength is 1.2-1.4 MPa, the tensile bonding strength after immersion is 0.8-1.0 MPa, the tensile bonding strength after heat aging is 1.1-1.3 MPa, the tensile bonding strength after freeze-thaw cycles is 1.0-1.2 MPa, the tensile bonding strength after 20 min of air setting is 0.6-0.85 MPa, and the 30 min sliding distance of 300 g tile is 0.15-0.25 mm.

[0060] In the technical scheme of the embodiment of the present application, the tile is pasted by using the tile glue as described in the first aspect, so that the tile has a suitable setting time, can be firmly pasted, and has good weather resistance.

[0061] Some specific examples are listed below, it should be noted that the examples described below are exemplary, only for the explanation of the present application, and can not be understood as a limitation of the present application. The technical or conditions not specified in the examples, according to the literature described in the art or according to the product specification. The reagents or instruments are not specified by the manufacturer, are the conventional products can be obtained by market.

[0062] The retarder used in the following examples and comparative examples is a protein retarder, which is purchased from Jiangsu Zhaojia, model ZJ-G18N; the water retaining agent is hydroxyethyl methyl cellulose; the crosslinking agent is silane coupling agent KH560.

[0063] I. Preparation method

[0064] Example 1

[0065] A ceramic tile glue, the preparation method is as follows:

[0066] (1) by mass fraction, take 40 parts of sulphoaluminate cement, 50 parts of anhydrous gypsum, 25 parts of β gypsum, 1 part of calcium oxide, 3 parts of alum, 1.25 parts of retarder, 1.25 parts of water retaining agent, 3.5 parts of crosslinking agent.

[0067] (2) the anhydrous gypsum, β gypsum, calcium oxide, alum, retarder, water retaining agent and crosslinking agent are mixed and stirred uniformly to obtain a mixture; then the mixture is mixed and stirred uniformly with cement to obtain ceramic tile glue powder.

[0068] Application method: the ceramic tile glue powder and water are dosed according to the mass ratio of 1:0.5, stirred to a particle-free paste with an electric mixer, and then the paste ceramic tile glue is used for ceramic tile sticking.

[0069] Example 2

[0070] A ceramic tile glue, the preparation method is as follows:

[0071] (1) by mass fraction, take 40 parts of sulphoaluminate cement, 50 parts of anhydrous gypsum, 25 parts of β gypsum, 1 part of calcium oxide, 3 parts of alum, 1.25 parts of retarder, 1.25 parts of water retaining agent, 3.5 parts of crosslinking agent.

[0072] (2) the anhydrous gypsum, β gypsum, calcium oxide, alum, retarder, water retaining agent and crosslinking agent are mixed and stirred uniformly to obtain a mixture; then the mixture is mixed and stirred uniformly with cement to obtain ceramic tile glue powder.

[0073] Application method: the ceramic tile glue powder and water are dosed according to the mass ratio of 1:0.5, stirred to a particle-free paste with an electric mixer, and then the paste ceramic tile glue is used for ceramic tile sticking.

[0074] Example 3

[0075] A ceramic tile glue, the preparation method is as follows:

[0076] (1) by mass fraction, take sulphoaluminate cement 40 parts, anhydrous gypsum 50 parts, beta gypsum 25 parts, calcium oxide 3 parts, alum 3 parts, retarder 1.25 parts, water retaining agent 1.25 parts, crosslinking agent 3.5 parts.

[0077] (2) the anhydrous gypsum, beta gypsum, calcium oxide, alum, retarder, water retaining agent and crosslinking agent are mixed and stirred uniformly to obtain a mixture; then the mixture is mixed and stirred uniformly with the cement to obtain a ceramic tile glue powder.

[0078] Application method: the ceramic tile glue powder and water are dosed according to the mass ratio of 1:0.5, stirred to a particle-free paste with an electric mixer, and then the paste-like ceramic tile glue is used for ceramic tile sticking.

[0079] Example 4

[0080] A ceramic tile glue, the preparation method is as follows:

[0081] (1) by mass fraction, take sulphoaluminate cement 40 parts, anhydrous gypsum 50 parts, beta gypsum 25 parts, calcium oxide 3 parts, alum 1 part, retarder 1.25 parts, water retaining agent 1.25 parts, crosslinking agent 3.5 parts.

[0082] (2) the anhydrous gypsum, beta gypsum, calcium oxide, alum, retarder, water retaining agent and crosslinking agent are mixed and stirred uniformly to obtain a mixture; then the mixture is mixed and stirred uniformly with the cement to obtain a ceramic tile glue powder.

[0083] Application method: the ceramic tile glue powder and water are dosed according to the mass ratio of 1:0.5, stirred to a particle-free paste with an electric mixer, and then the paste-like ceramic tile glue is used for ceramic tile sticking.

[0084] Example 5

[0085] A ceramic tile glue, the preparation method is as follows:

[0086] (1) by mass fraction, take sulphoaluminate cement 40 parts, anhydrous gypsum 50 parts, beta gypsum 25 parts, calcium oxide 3 parts, alum 2 parts, retarder 1.25 parts, water retaining agent 1.25 parts, crosslinking agent 3.5 parts.

[0087] (2) the anhydrous gypsum, beta gypsum, calcium oxide, alum, retarder, water retaining agent and crosslinking agent are mixed and stirred uniformly to obtain a mixture; then the mixture is mixed and stirred uniformly with the cement to obtain a ceramic tile glue powder.

[0088] Application method: the ceramic tile glue powder and water are dosed according to the mass ratio of 1:0.5, stirred to a particle-free paste with an electric mixer, and then the paste-like ceramic tile glue is used for ceramic tile sticking.

[0089] Example 6

[0090] A ceramic tile glue is prepared as follows:

[0091] (1) By mass parts, take 20 parts of sulphoaluminate cement, 30 parts of anhydrous gypsum, 20 parts of β gypsum, 2 parts of calcium oxide, 2 parts of alum, 1.25 parts of retarder, 1.25 parts of water retaining agent, 3.5 parts of crosslinking agent.

[0092] (2) Mix and stir the anhydrous gypsum, β gypsum, calcium oxide, alum, retarder, water retaining agent and crosslinking agent uniformly to obtain a mixture; then mix and stir the mixture with the cement uniformly to obtain a ceramic tile glue powder.

[0093] Application method: The ceramic tile glue powder and water are dosed according to a mass ratio of 1:0.5, stirred to a particle-free paste with an electric mixer, and then the paste-like ceramic tile glue is used to bond ceramic tiles.

[0094] Example 7

[0095] A ceramic tile glue is prepared as follows:

[0096] (1) By mass parts, take 30 parts of sulphoaluminate cement, 40 parts of anhydrous gypsum, 23 parts of β gypsum, 2.5 parts of calcium oxide, 2.5 parts of alum, 1.25 parts of retarder, 1.25 parts of water retaining agent, 3.5 parts of crosslinking agent.

[0097] (2) Mix and stir the anhydrous gypsum, β gypsum, calcium oxide, alum, retarder, water retaining agent and crosslinking agent uniformly to obtain a mixture; then mix and stir the mixture with the cement uniformly to obtain a ceramic tile glue powder.

[0098] Application method: The ceramic tile glue powder and water are dosed according to a mass ratio of 1:0.5, stirred to a particle-free paste with an electric mixer, and then the paste-like ceramic tile glue is used to bond ceramic tiles.

[0099] Comparative Example 1

[0100] A ceramic tile glue is prepared as follows:

[0101] (1) By mass parts, take 40 parts of sulphoaluminate cement, 50 parts of anhydrous gypsum, 25 parts of β gypsum, 1.25 parts of retarder, 1.25 parts of water retaining agent, 3.5 parts of crosslinking agent.

[0102] (2) Mix and stir the anhydrous gypsum, β gypsum, retarder, water retaining agent and crosslinking agent uniformly to obtain a mixture; then mix and stir the mixture with the cement uniformly to obtain a ceramic tile glue powder.

[0103] Comparative Example 2

[0104] A ceramic tile glue is prepared by the following method:

[0105] (1) 40 parts of sulphoaluminate cement, 50 parts of anhydrous gypsum, 25 parts of beta gypsum, 5 parts of alum, 1.25 parts of retarder, 1.25 parts of water retaining agent, and 3.5 parts of crosslinking agent are weighed by mass fraction.

[0106] (2) The anhydrous gypsum, beta gypsum, alum, retarder, water retaining agent, and crosslinking agent are mixed and stirred uniformly to obtain a mixture; then the mixture is mixed and stirred uniformly with the cement to obtain a ceramic tile glue powder.

[0107] Comparative Example 3

[0108] A ceramic tile glue is prepared by the following method:

[0109] (1) 40 parts of sulphoaluminate cement, 50 parts of anhydrous gypsum, 25 parts of beta gypsum, 5 parts of calcium oxide, 1.25 parts of retarder, 1.25 parts of water retaining agent, and 3.5 parts of crosslinking agent are weighed by mass fraction.

[0110] (2) The anhydrous gypsum, beta gypsum, calcium oxide, retarder, water retaining agent, and crosslinking agent are mixed and stirred uniformly to obtain a mixture; then the mixture is mixed and stirred uniformly with the cement to obtain a ceramic tile glue powder.

[0111] Comparative Example 4

[0112] A ceramic tile glue is prepared by the following method:

[0113] (1) 40 parts of sulphoaluminate cement, 70 parts of anhydrous gypsum, 25 parts of beta gypsum, 2 parts of calcium oxide, 3 parts of alum, 1.25 parts of retarder, 1.25 parts of water retaining agent, and 3.5 parts of crosslinking agent are weighed by mass fraction.

[0114] (2) The anhydrous gypsum, beta gypsum, calcium oxide, alum, retarder, water retaining agent, and crosslinking agent are mixed and stirred uniformly to obtain a mixture; then the mixture is mixed and stirred uniformly with the cement to obtain a ceramic tile glue powder.

[0115] Comparative Example 5

[0116] A ceramic tile glue is prepared by the following method:

[0117] (1) 40 parts of sulphoaluminate cement, 10 parts of anhydrous gypsum, 25 parts of beta gypsum, 2 parts of calcium oxide, 3 parts of alum, 1.25 parts of retarder, 1.25 parts of water retaining agent, and 3.5 parts of crosslinking agent are weighed by mass fraction.

[0118] (2) The anhydrous gypsum, beta gypsum, calcium oxide, alum, retarder, water retaining agent, and crosslinking agent are mixed and stirred uniformly to obtain a mixture; then the mixture is mixed and stirred uniformly with the cement to obtain a ceramic tile glue powder.

[0119] Comparative Example 6

[0120] A ceramic tile adhesive is prepared as follows:

[0121] (1) Take 60 parts of sulphoaluminate cement, 50 parts of anhydrous gypsum, 25 parts of beta gypsum, 2 parts of calcium oxide, 3 parts of alum, 1.25 parts of retarder, 1.25 parts of water retaining agent, and 3.5 parts of crosslinking agent by mass fraction.

[0122] (2) Mix and stir the anhydrous gypsum, beta gypsum, calcium oxide, alum, retarder, water retaining agent, and crosslinking agent uniformly to obtain a mixture; then mix and stir the mixture with the cement uniformly to obtain a ceramic tile adhesive powder.

[0123] Comparative Example 7

[0124] A ceramic tile adhesive is prepared as follows:

[0125] (1) Take 10 parts of sulphoaluminate cement, 50 parts of anhydrous gypsum, 25 parts of beta gypsum, 2 parts of calcium oxide, 3 parts of alum, 1.25 parts of retarder, 1.25 parts of water retaining agent, and 3.5 parts of crosslinking agent by mass fraction.

[0126] (2) Mix and stir the anhydrous gypsum, beta gypsum, calcium oxide, alum, retarder, water retaining agent, and crosslinking agent uniformly to obtain a mixture; then mix and stir the mixture with the cement uniformly to obtain a ceramic tile adhesive powder.

[0127] Comparative Example 8

[0128] A ceramic tile adhesive is prepared as follows:

[0129] (1) Take 40 parts of sulphoaluminate cement, 50 parts of anhydrous gypsum, 40 parts of beta gypsum, 2 parts of calcium oxide, 3 parts of alum, 1.25 parts of retarder, 1.25 parts of water retaining agent, and 3.5 parts of crosslinking agent by mass fraction.

[0130] (2) Mix and stir the anhydrous gypsum, beta gypsum, calcium oxide, alum, retarder, water retaining agent, and crosslinking agent uniformly to obtain a mixture; then mix and stir the mixture with the cement uniformly to obtain a ceramic tile adhesive powder.

[0131] Comparative Example 9

[0132] A ceramic tile adhesive is prepared as follows:

[0133] (1) Take 40 parts of sulphoaluminate cement, 50 parts of anhydrous gypsum, 10 parts of beta gypsum, 2 parts of calcium oxide, 3 parts of alum, 1.25 parts of retarder, 1.25 parts of water retaining agent, and 3.5 parts of crosslinking agent by mass fraction.

[0134] (2) Mix anhydrite, beta gypsum, calcium oxide, alum, retarder, water retaining agent and crosslinking agent to obtain a mixture; then mix the mixture with cement to obtain a tile glue powder.

[0135] II. Test method

[0136] The tile glue of the above examples 1-6 and comparative examples 1-9 is applied to the tile, and the initial setting time, final setting time and adhesive strength are tested;

[0137] (1) Initial and final setting time: the initial setting time is counted from the time when the tile glue is added, and the trace of indentation test is not obvious, indicating that the tile has been initially set, and the time consumed is the initial setting time; the final setting time is the time required for the tile glue to completely lose plasticity and begin to produce strength.

[0138] (2) Adhesive strength: according to JC / T547-2017 "Ceramic Wall and Floor Tile Adhesive", the adhesive tensile strength after complete setting is tested.

[0139] (3) Anti-slip performance: the anti-slip performance of the tile is tested by using the inclined platform method of GB / T26542-2011; the displacement distance of 300g tile in 30 minutes.

[0140] III. Analysis of test results of each example and comparative example

[0141] Table 1 Composition of tile glue of examples and comparative examples (parts)

[0142]

[0143] Table 2 Test results of tile glue performance of examples and comparative examples

[0144]

[0145] As shown in Table 2, the tile adhesive provided by the application has a short setting time, and the time for losing plasticity and starting to generate strength is less than 24 h, which greatly shortens the tiling period of the tile. Among them, the initial setting time of the tile adhesive in Examples 1, 2, 4 and 6 is ≥20 min, compared with Examples 3, 5 and 7, the time for construction operation is more sufficient, and it is more conducive to actual operation. At the same time, when setting quickly, the adhesive tensile strength of the tile adhesive is relatively high, between 1.2-1.4 MPa, the tensile bonding strength after immersion is 0.8-1.0 MPa, the tensile bonding strength after heat aging is 1.1-1.3 MPa, the tensile bonding strength after freeze-thaw cycle is 1.0-1.2 MPa, the tensile bonding strength after standing for 20 min is 0.6-0.85 MPa, and the 30 min sliding distance of 300 g tile is 0.15-0.25 mm, which meets the technical requirements of JC / T 547-2017 Ceramic Wall and Floor Tile Adhesive, and the product quality is good.

[0146] As can be seen from Examples 1-3, calcium oxide affects the initial and final setting time. When the amount of alum is constant, the initial and final setting time decreases with the increase of calcium oxide. Among them, the initial setting time of Example 2 is >20 min, and the final setting time is <120 min, which not only ensures sufficient construction operation time in the early stage, but also quickly sets after construction, and the bonding strength is basically not affected. As can be seen from Examples 3-5, when the content of calcium oxide is constant, the initial and final setting time is shortened with the increase of alum content, and the construction operation time of Example 4 is longer.

[0147] As can be seen from Comparative Example 1 and Example 2, the activator affects the initial and final setting time, indicating that the activator can promote the conversion of anhydrous gypsum to cementitious material; at the same time, the activator also affects the bonding strength and weather resistance of the tile adhesive.

[0148] As can be seen from Comparative Examples 2-3 and Example 2, calcium oxide and alum have a significant effect on the initial and final setting time; among them, calcium oxide mainly affects the initial setting time, which can ensure sufficient operation time for construction, and alum mainly affects the final setting time, which makes the tile quickly set after being pasted. At the same time, it can be seen that the application can not only obtain better initial and final setting time by compounding calcium oxide and alum, but also has good bonding effect of tile adhesive.

[0149] As can be seen from Comparative Examples 4-5 and Example 2, too much anhydrous gypsum will cause the setting time to be prolonged, and the bonding strength will be decreased, which is because too much anhydrous gypsum cannot be fully hydrated; too little anhydrous gypsum will make the hydration speed too fast, thereby reducing the initial setting time, and basically not affecting the bonding strength and weather resistance.

[0150] Compared with Example 2, it can be seen from Comparative Examples 6-7 that too much cement increases the initial and final setting time, too little cement shortens the initial setting time and slightly increases the final setting time, and too much or too little cement both decrease the bonding strength.

[0151] Compared with Example 2, it can be seen from Comparative Examples 8-9 that too much β-gypsum shortens the initial setting time and has little effect on the final setting time, and too little β-gypsum significantly increases both the initial and final setting time, which is not conducive to rapid setting and affects the bonding strength of the tile glue.

[0152] It should be noted that the present application is not limited to the above-described embodiments. The above-described embodiments are merely examples, and embodiments having substantially the same configuration and playing the same role and effect as the technical idea within the scope of the technical solutions of the present application are all included in the technical scope of the present application. Furthermore, within the scope of the gist of the present application, various modifications that can be thought of by those skilled in the art, other modes constructed by combining part of the configuration elements of the embodiments are also included in the scope of the present application.

Claims

1. A tile adhesive, characterized in that, The cement is one or more of sulphoaluminate cement, Portland cement and aluminate cement.

2. The tile glue according to claim 1, characterized in that, The mass ratio of the calcium oxide and the alum is 2:

3.

3. The tile glue according to claim 1, characterized in that, The cement is one or more of sulphoaluminate cement, Portland cement and aluminate cement.

4. The tile glue according to claim 1, characterized in that, The mesh number of the anhydrous gypsum is 600-1300 mesh.

5. The tile glue according to claim 1, characterized in that, The retarder is a protein-based retarder; and / or The water-retaining agent is a cellulose ether compound; and / or The cross-linking agent is one or more of a silane coupling agent and a titanate coupling agent.

6. The tile glue according to claim 1, characterized in that, The cement is one or more of sulphoaluminate cement, Portland cement and aluminate cement.

7. A method of preparing the tile adhesive according to any one of claims 1 to 6, characterized in that, The cement is one or more of sulphoaluminate cement, Portland cement and aluminate cement. The cement is one or more of sulphoaluminate cement, Portland cement and aluminate cement. The cement is one or more of sulphoaluminate cement, Portland cement and aluminate cement.

8. Use of a tile adhesive according to any one of claims 1 to 6, characterized in that The cement is one or more of sulphoaluminate cement, Portland cement and aluminate cement.

9. Use of a tile glue according to claim 8, characterized in that, The cement is one or more of sulphoaluminate cement, Portland cement and aluminate cement. The cement is one or more of sulphoaluminate cement, Portland cement and aluminate cement. The cement is one or more of sulphoaluminate cement, Portland cement and aluminate cement. The cement is one or more of sulphoaluminate cement, Portland cement and aluminate cement. The cement is one or more of sulphoaluminate cement, Portland cement and aluminate cement. The cement is one or more of sulphoaluminate cement, Portland cement and aluminate cement. The cement is one or more of sulphoaluminate cement, Portland cement and aluminate cement. The cement is one or more of sulphoaluminate cement, Portland cement and aluminate cement. The cement is one or more of sulphoaluminate cement, Portland cement and aluminate cement. The cement is one or more of sulphoaluminate cement, Portland cement and aluminate cement. 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