CN111747714A

CN111747714A - Ceramic tile adhesive and preparation method thereof

Info

Publication number: CN111747714A
Application number: CN202010669413.4A
Authority: CN
Inventors: 谢剑锐; 罗建光; 谢剑锋
Original assignee: Fujian Iron And Steel Great Wall Environmental Protection Technology Co ltd
Current assignee: Fujian Iron And Steel Great Wall Environmental Protection Technology Co ltd
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2020-10-09

Abstract

The invention relates to a tile adhesive, which comprises the following components in parts by mass: 50-65 parts of river sand, 16-20 parts of silicate cement, 2.5-3 parts of quick-drying cement, 13-16 parts of slag, 2-8 parts of light filler, 0.2-0.3 part of hydroxypropyl methyl cellulose, 0.5-1 part of early strength agent, 1-1.5 parts of rubber powder, 0.1-0.3 part of silane coupling agent and 0-0.01 part of starch ether. The tile adhesive 5cm has the advantages of quick drying after thick coating, low shrinkage, low carbon emission and environmental protection.

Description

Ceramic tile adhesive and preparation method thereof

Technical Field

The invention relates to the field of building materials, in particular to a tile adhesive and a preparation method thereof.

Background

With the widespread application of vitrified tiles, people find that when vitrified tiles are paved by adopting the traditional method of stirring yellow sand thick layer back coating and paving vitrified tiles on cement site, large-area hollowing and falling of the vitrified tiles are easy to occur after a period of construction.

The reason is that the mechanical and physical properties of the product are improved by vitrified tile factories, so that the water absorption of vitrified tiles is lower and lower, and the water absorption of many vitrified tiles on the market at present is lower than 0.5 percent which is required by national standard by one order of magnitude and actually reaches less than 0.05 percent. The low water absorption rate ensures that the bonding surface of the vitrified tile hardly absorbs water, if the traditional cement stirring yellow sand paving method is adopted, the cement mortar and the bonding surface of the brick are difficult to form a lasting mechanical anchoring effect, and the vitrified tile which is pasted almost can fall off.

Therefore, the cement-based tile adhesive is currently used in the market for sticking, but the tiles still have a large range of hollowing and falling. The adhesive adopts a method of mixing a high proportion of cement with a high proportion of cellulose for water retention, and the cement mixing amount is in a water activation state on the basis of long-term water retention, and the state is unstable, so that the shrinkage phenomenon of the adhesive is easily caused, and hollowing and brick dropping are caused. Meanwhile, the adhesive has large shrinkage and long drying time, and is suitable for the condition that the bonding thickness is less than 3 cm. The wall surface of the current domestic building has low flatness and has uneven conditions, if the existing adhesive is directly used for leveling and sticking for one-time forming, the local coating thickness of the adhesive can exceed 3mm, and the part of the adhesive is slowly dried or not dried; after the ceramic tile is pasted, the part of colloid is easy to shrink locally, and finally the ceramic tile falls off. And if the wall surface is leveled before bonding, more cost is consumed.

Simultaneously, the self weight of the ceramic tile adhesive is large, the mass of a building can be increased by using the ceramic tile adhesive in a large amount, and the load of the building is caused.

Disclosure of Invention

In order to solve the above problems, the inventors have provided a quick-drying, low-shrinkage tile adhesive suitable for coatings of different thicknesses, which can firmly bond tiles, avoiding hollowing and falling of the tiles.

In a first aspect of the invention, the inventors provide a tile adhesive comprising the following components in parts by mass: 50-65 parts of river sand, 16-20 parts of silicate cement, 2.5-3 parts of quick-drying cement, 13-16 parts of slag, 2-8 parts of light filler, 0.2-0.3 part of hydroxypropyl methyl cellulose, 0.5-1 part of early strength agent, 1-1.5 parts of rubber powder, 0.1-0.3 part of silane coupling agent and 0-0.01 part of starch ether.

The slag is light in weight, contains a large amount of active ingredients such as SiO2 and Al2O3, and is uniformly distributed in the bonding coating when the slag is used, so that the shrinkage phenomenon of the bonding layer can be reduced, and the tensile bonding strength of the tile adhesive can be improved. The active substances in the slag react with the cement hydration product Ca (OH)2, so that the tensile bonding strength of the tile bonding layer can be improved.

The light filler has the function of filling cavities in the bonding layer, the cement wall and the ceramic tile, can improve the leveling property of the bonding layer of the ceramic tile, improve the viscosity of colloid, increase the paving area of the ceramic tile adhesive and reduce the shrinkage rate of the ceramic tile adhesive during painting, and is suitable for thin painting of a coating with the thickness of 1cm by using the light filler in a proper amount.

The slag and the light filler can play a role in dispersing the original large shearing stress between the ceramic tile adhesive and the ceramic tile, and the ceramic tile falling caused by the overlarge shearing force is avoided.

The quick-drying cement can improve the drying speed of the ceramic tile bonding layer and avoid hollowing and brick falling caused by long-time hydration shrinkage of a thicker coating. Meanwhile, the ettringite generated in the hydration process of the quick-drying cement has an expansion effect, can partially offset the shrinkage of the whole system, reduces the shrinkage rate of the thick paste, and ensures the dimensional stability of the thick paste mortar. The quick-drying cement has high early strength and continuously increased later strength.

Silane coupling agents are purchased from the new materials science and technology, llc of lin, Hunan. The silane coupling agent is powdery and is a bifunctional additive with one epoxy group and three methoxy silicon groups. The bifunctional structure enables organic materials in the ceramic tile and the adhesive to be crosslinked and bonded together, so that the adhesive force is improved.

Further, the fineness of the river sand is 50-100 meshes.

Further, the quick-drying cement is sulphoaluminate cement, the initial setting time of the sulphoaluminate cement is more than 25min, and the final setting time is less than 3 h.

Furthermore, the fineness of the light filler is 40-70 meshes, and the light filler comprises one or a mixture of vitrified micro-beads, hollow microspheres and perlite.

Further, the early strength agent is calcium formate.

Further, the rubber powder is styrene acrylate.

Further, the tile adhesive is used after being mixed with water accounting for 30-35% of the mass of the tile adhesive.

The inventor also provides a preparation method of the tile adhesive, which comprises the following steps:

weighing: weighing the components according to the mass parts of the first aspect of the invention;

mixing: and uniformly mixing the weighed materials to obtain the ceramic tile adhesive.

The ceramic tile adhesive is characterized in that the ceramic tile adhesive comprises silicate cement, quick-drying cement, slag, light filler, hydroxypropyl methyl cellulose, an early strength agent and rubber powder, the drying time of a 5cm adhesive layer of the ceramic tile adhesive is within 24 hours, the ceramic tile adhesive has the characteristics of thick coating, quick drying and low shrinkage rate, and meanwhile, the ceramic tile adhesive is low in carbon emission and environment-friendly.

Detailed Description

In order to explain technical contents, structural features, and objects and effects of the technical means in detail, the following detailed description is given with reference to specific embodiments.

Example 1

Weighing: 50 parts by mass of river sand of 50-100 meshes, 16 parts by mass of silicate cement, 2.5 parts by mass of quick-drying cement, 13 parts by mass of slag, 2 parts by mass of light filler (vitrified micro bubbles) of 40-70 meshes, 0.2 part by mass of hydroxypropyl methyl cellulose, 0.5 part by mass of early strength agent calcium formate, 0.1 part by mass of silane coupling agent and 1 part by mass of rubber powder styrene acrylate.

Mixing: and dry-mixing the weighed materials to obtain the tile adhesive 1.

Example 2

Weighing: 65 parts by mass of river sand of 50-100 meshes, 20 parts by mass of silicate cement, 3 parts by mass of quick-drying cement, 16 parts by mass of slag, 8 parts by mass of light filler of 40-70 meshes, 0.3 part by mass of hydroxypropyl methyl cellulose, 1 part by mass of an early strength agent, 1.5 parts by mass of rubber powder, 0.2 part by mass of a silane coupling agent and 0.01 part by mass of starch ether.

Mixing: and dry-mixing the weighed materials to obtain the tile adhesive 2.

Example 3

Weighing: 60 parts of river sand of 50-100 meshes, 18 parts of silicate cement, 2.7 parts of quick-drying cement, 15 parts of slag, 6 parts of light filler of 40-70 meshes, 0.2 part of hydroxypropyl methyl cellulose, 0.8 part of early strength agent, 1.2 parts of rubber powder, 0.3 part of silane coupling agent and 0.01 part of starch ether.

Mixing: and dry-mixing the weighed materials to obtain the tile adhesive 3.

Example 4

Weighing: 60 parts of river sand of 50-100 meshes, 17 parts of silicate cement, 2.8 parts of quick-drying cement, 14 parts of slag, 7 parts of light filler of 40-70 meshes, 0.28 part of hydroxypropyl methyl cellulose, 0.6 part of early strength agent, 0.3 part of silane coupling agent and 1.3 parts of rubber powder.

Mixing: and dry-mixing the weighed materials to obtain the tile adhesive 4.

Example 5 Performance testing

The tile adhesives prepared in the embodiments 1 to 4 are added with 30 to 35 weight percent of water, and after being uniformly mixed, the tile adhesives are tested, and the results meet the performance index requirements of GB/T25181-2020 Pre-mixing mortar 6.2.5 Dry-mix ceramic tile bonding mortar type I (indoor), and simultaneously, the carbon emission of the tile adhesives is 200kg CO₂The t is lower than that of the existing ceramic tile glue by more than 40 percent.

The results of the remaining tests are shown in the following table: (comparative example Using a commercially available Portland Cement-based Tile adhesive)

	Strong tensile adhesionDegree (MPa)	Tensile bond Strength (MPa) after Water immersion test
			Example 1	1.02	0.98
Example 2	1.04	1.01
			Example 3	1.01	0.99
Example 4	0.98	0.96
			Comparative example	0.81	0.62

The drying time of the adhesive layer is within 24h at an adhesive thickness of 5cm, wherein the tensile bond strength and the tensile bond strength after the water immersion test are greatly improved compared with the commercial products.

The tensile bond strength test method comprises the following steps: GB/T25181-2010 premixed mortar 6.2.5;

it is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrases "comprising … …" or "comprising … …" does not exclude the presence of additional elements in a process, method, article, or terminal that comprises the element. Further, herein, "greater than," "less than," "more than," and the like are understood to exclude the present numbers; the terms "above", "below", "within" and the like are to be understood as including the number.

It should be noted that, although the above embodiments have been described herein, the invention is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein or by using equivalent structures or equivalent processes performed in the present specification, and are included in the scope of the present invention.

Claims

1. The tile adhesive is characterized by comprising the following components in parts by mass: 50-65 parts of river sand, 16-20 parts of Portland cement, 2.5-3 parts of quick-drying cement, 13-16 parts of slag, 2-8 parts of light filler, 0.2-0.3 part of hydroxypropyl methyl cellulose, 0.5-1 part of early strength agent, 1-1.5 parts of rubber powder, 0.1-0.3 part of silane coupling agent and 0-0.01 part of starch ether.

2. The tile adhesive of claim 1, wherein the river sand is 50-100 mesh fine.

3. A tile adhesive according to claim 1, wherein the quick setting cement is a sulphoaluminate cement having an initial setting time of greater than 25min and a final setting time of less than 3 hours.

4. The tile adhesive according to claim 1, wherein the light filler has a fineness of 40-70 meshes and comprises one or a mixture of vitrified microbeads, hollow microspheres and perlite.

5. The tile adhesive of claim 1, wherein the early strength agent is calcium formate.

6. The tile adhesive of claim 1, wherein the glue powder is styrene acrylate.

7. A tile adhesive according to claim 1, wherein the thickness of the bond coat formed by the tile adhesive is 1-5 cm.

8. Tile adhesive according to claim 1, characterized in that said tiles have a water absorption lower than 0.05%.

9. The tile adhesive of claim 1, wherein the tile adhesive is mixed with water in an amount of 30 to 35% by mass of the tile adhesive and used.

10. The preparation method of the tile adhesive is characterized by comprising the following steps:

weighing: weighing the components in parts by weight according to claim 1;