Ceramic tile adhesive and its use in cementitious ceramic tile adhesive

Abstract

The application provides a ceramic tile adhesive additive and application thereof in cement-based ceramic tile adhesive, and the ceramic tile adhesive additive comprises the following components and has the following component ratio: light component A, 95-100%; micro-expansion component B, 0.001-5%; water reducing agent, 0.001-5%; and defoaming agent, 0.001-5%. The ceramic tile adhesive additive improves the anti-slippage performance of the cement-based ceramic tile adhesive, and can improve the construction performance of the cement-based ceramic tile adhesive, so that the scraping is smoother, the construction efficiency is improved, and the bonding strength of the cement-based ceramic tile adhesive is not reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of new building materials, and particularly relates to a ceramic tile adhesive and application of the ceramic tile adhesive in cement-based ceramic tile adhesive. BACKGROUND

[0002] Ceramic tile is a kind of building material widely used in the building decoration industry. Ceramic tile adhesive is commonly used for the pasting of ceramic tile. The ceramic tile adhesive is a dry powder mixture mainly composed of cementitious material, sand and functional admixture, which can be used by mixing with water. The ceramic tile adhesive has high bonding strength, good water resistance, freeze-thaw resistance and heat aging resistance, and is a good adhesive material. At present, with the continuous improvement of the specialization degree of the ceramic tile market, large ceramic tiles are increasingly popular in the field of high-end residential finishing. For large-size ceramic tiles, the ceramic tile adhesive needs to have high bonding strength and good anti-slippage performance.

[0003] Generally, starch ether is added in the ceramic tile adhesive to improve the anti-slippage performance, but the anti-slippage performance can only meet the basic requirement of anti-slippage ≤0.5mm for ceramic tiles with a single piece mass ≤200g in the standard JC / T547-2017. However, many ceramic tiles on the market are large tiles with a single piece mass exceeding 200g. Even if the existing ceramic tile adhesive meets the aforementioned standard requirements, in actual application, the large tiles with a single piece mass exceeding 200g often have obvious slippage due to the insufficient performance of the ceramic tile adhesive. In addition, the ceramic tile adhesive with high bonding strength on the market generally has the problem of laborious scraping and low work efficiency of workers. SUMMARY

[0004] In order to solve the problem of slippage of large ceramic tiles and the contradiction between high bonding strength and laborious construction of the ceramic tile adhesive, the present application provides a ceramic tile adhesive additive for improving the anti-slippage performance of the cement-based ceramic tile adhesive, and improving the construction performance of the cement-based ceramic tile adhesive, so that the scraping is smoother, the construction efficiency is improved, and the bonding strength of the cement-based ceramic tile adhesive is not negatively affected. That is, the ceramic tile adhesive additive of the present application not only improves the anti-slippage performance of the cement-based ceramic tile adhesive, but also improves the construction performance of the cement-based ceramic tile adhesive.

[0005] The composition and ratio of the ceramic tile adhesive additive of the present application are as follows:

[0006]

[0007] The composition in the light component A includes any one and two or more than two of any proportion of perlite, vitrified microbeads, light sand, light fly ash and silica fume, and the particle size range is 0.5-3mm and the dry bulk density is 50-500kg / m3.

[0008] The tile adhesive additive reduces the loose bulk density of the tile adhesive and the wet bulk density of the tile adhesive after stirring with water, that is, the self-weight of the tile adhesive after stirring is reduced, and the tile adhesive additive can adjust the consistency of the tile adhesive, thereby improving the anti-slippage performance of the tile adhesive.

[0009] The micro-expansion component B in the tile adhesive additive compensates for the shrinkage of the cement-based tile adhesive by using the volume expansion generated by the micro-expansion component B during hydration.

[0010] The micro-expansion component B is a calcium-magnesium composite expansion agent composed of a calcium expansion component and a magnesium expansion component with specific activity. The micro-expansion component generates early expansion using a specially designed calcium expansion component to compensate for early shrinkage and generate pre-stress under restraint conditions, and uses magnesium oxide with specific activity to compensate for temperature drop shrinkage and late shrinkage of the cement-based tile adhesive, thereby achieving stage-by-stage and whole-process shrinkage inhibition of the cement-based tile adhesive and achieving no shrinkage. The micro-expansion component B is a calcium-magnesium composite expansion agent, wherein the content of MgO should not be less than 30% and should not be more than 50%.

[0011] The tile adhesive additive adds a component that increases the water bleeding property, namely a water reducing agent and a defoaming agent. By using a certain amount of water reducing agent and defoaming agent, the water bleeding property of the cement-based tile adhesive is increased.

[0012] According to GB / T547-2017 "Ceramic Tile Adhesive", after the base surface is coated with adhesive and left to stand for ≥20 minutes, the tile is pasted, it is found that the tile adhesive surface will dry due to loss of moisture, which will result in a decrease in bonding tensile strength after standing for ≥20 minutes. In addition, during construction on the construction site, the workers' efficiency in pasting tiles is not high, and the treatment of inside and outside corners and the cutting of tiles will affect the construction progress. Generally, it takes at least 1.5 hours to use a 30kg tile adhesive stirred in a bucket, resulting in low tile adhesive surface moisture at the end of use, affecting the bonding strength. In view of this situation, it is particularly important to add a component that can effectively increase the water bleeding property of the tile adhesive.

[0013] The water bleeding effect of the cement-based tile adhesive is achieved by adding a certain amount of water reducing agent and auxiliary defoaming agent, so that the tile adhesive surface is still wet after standing for ≥20 minutes, and the bonding strength after pasting the tile is basically not affected.

[0014] The water reducing agent is any one or a mixture of two or more of polycarboxylate superplasticizer, melamine-based superplasticizer, naphthalene-based superplasticizer, and lignin-based superplasticizer in any proportion.

[0015] The defoaming agent is any one or a mixture of two or more of polyether, high-carbon alcohol, oil, and silicone defoaming agents in any proportion.

[0016] The tile adhesive additive described in the application is used in cement-based tile adhesive to improve the anti-slippage performance of the tile adhesive, and the amount of the tile adhesive additive accounts for 0.5-40% of the total mass of the cement-based tile adhesive.

[0017] The tile adhesive additive described in the application reduces the loose bulk density of the tile adhesive and the wet bulk density of the tile adhesive after stirring with water, that is, the self-weight of the tile adhesive after stirring is reduced. In addition, the tile adhesive additive can adjust the consistency of the cement-based tile adhesive, thereby improving the anti-slippage performance of the tile adhesive. Through the synergistic effect of the micro-expansion component, the water reducing agent and the defoaming agent, the shrinkage of the traditional cement-based material is compensated, and the bleeding performance is improved, thereby solving the problem of reduced tile adhesive bonding strength caused by long storage time. DETAILED DESCRIPTION

[0018] The light component A contains any one of perlite, vitrified microbeads, light sand, lightweight fly ash, silica fume and a mixture of two or more thereof in any proportion. The particle size of the light component A ranges from 0.5 to 1.5 mm, and the dry bulk density ranges from 50 to 500 kg / m 3 .

[0019] The micro-expansion component B is CM20 calcium-magnesium composite expander;

[0020] The water reducing agent is any one of polycarboxylate water reducing agent, melamine-based water reducing agent, naphthalene-based water reducing agent, and lignin-based water reducing agent, or a mixture of two or more thereof in any proportion;

[0021] The defoaming agent is any one of polyether, high-carbon alcohol, oil, and silicon defoaming agent, or a mixture of two or more thereof in any proportion.

[0022] Example 1

[0023] A tile adhesive additive is provided, and the light component A accounts for 100%. No micro-expansion component B, water reducing agent, and defoaming agent are added. In the light component A, the ratio of perlite:light sand:lightweight fly ash:silica fume is 100:0:0:0.

[0024] The tile adhesive additive accounts for 2% of the tile adhesive. In addition, the tile adhesive further contains dispersible latex powder 1.5%, water retaining agent 0.4%, calcium formate 1%, heavy calcium 15%, Portland cement 35%, and fine sand 45.1%.

[0025] Example 2

[0026] A tile adhesive additive is provided, and the light component A accounts for 100%. No micro-expansion component B, water reducing agent, and defoaming agent are added. In the light component A, the ratio of perlite:light sand:lightweight fly ash:silica fume is 100:0:0:0.

[0027] The tile adhesive additive accounts for 15% of the tile adhesive; in addition, the tile adhesive further adds: dispersible latex powder 2%, water retaining agent 0.4%, calcium formate 1%, heavy calcium 15%, Portland cement 42.5 35%, fine sand 31.6%.

[0028] Example 3

[0029] A tile adhesive additive is provided, light component A 100%, without adding micro-expansion component B, water reducing agent and defoaming agent; wherein, in the light component A, perlite: light sand: light fly ash: silica ash = 100:0:0:0.

[0030] The tile adhesive additive accounts for 0.5% of the tile adhesive; in addition, the tile adhesive further adds: dispersible latex powder 2%, water retaining agent 0.4%, calcium formate 1%, heavy calcium 15%, Portland cement 42.5 35%, fine sand 46.6%.

[0031] Example 4

[0032] A tile adhesive additive is provided, light component A 98%, micro-expansion component B 2%, without adding water reducing agent and defoaming agent; wherein, in the light component A, perlite: light sand: light fly ash: silica ash = 100:0:0:0.

[0033] The tile adhesive additive accounts for 2% of the tile adhesive; in addition, the tile adhesive further adds: dispersible latex powder 1.5%, water retaining agent 0.4%, calcium formate 1%, heavy calcium 15%, Portland cement 42.5 35%, fine sand 45.1%.

[0034] Example 5

[0035] A tile adhesive additive is provided, light component A 95%, micro-expansion component B 2%, water reducing agent 2%, defoaming agent 1%; wherein, in the light component A, perlite: light sand: light fly ash: silica ash = 100:0:0:0.

[0036] The tile adhesive additive accounts for 2% of the tile adhesive; in addition, the tile adhesive further adds: dispersible latex powder 1.5%, water retaining agent 0.4%, calcium formate 1%, heavy calcium 15%, Portland cement 42.5 35%, fine sand 45.1%.

[0037] Example 6

[0038] A tile adhesive additive is provided, light component A 95%, micro-expansion component B 2%, water reducing agent 2%, defoaming agent 1%; wherein, in the light component A, perlite: light sand: light fly ash: silica ash = 50:50:0:0.

[0039] The tile adhesive additive accounts for 2% of the tile adhesive; in addition, the tile adhesive further adds: dispersible latex powder 1.5%, water retaining agent 0.4%, calcium formate 1%, heavy calcium 15%, Portland cement 42.5 35%, fine sand 45.1%.

[0040] Example 7

[0041] A tile adhesive additive is provided, light component A 95%, micro-expansion component B 2%, water reducing agent 2%, defoaming agent 1%; wherein, in the light component A, perlite: light sand: light fly ash: silica ash = 50:25:15:10.

[0042] The tile adhesive additive accounts for 2% of the tile adhesive; in addition, the tile adhesive further adds: dispersible latex powder 1.5%, water retaining agent 0.4%, calcium formate 1%, heavy calcium 15%, Portland cement 42.5 35%, fine sand 45.1%.

[0043] Example 8

[0044] A tile adhesive additive is provided, light component A 95%, micro-expansion component B 2%, water reducing agent 2%, defoaming agent 1%; wherein, in the light component A, perlite: light sand: light fly ash: silica ash = 50:25:15:10.

[0045] The tile adhesive additive accounts for 2% of the tile adhesive; in addition, the tile adhesive further adds: dispersible latex powder 1.5%, water retaining agent 0.4%, calcium formate 1%, heavy calcium 15%, Portland cement 42.5 35%, fine sand 45.1%.

[0046] Comparative Example 1

[0047] No tile adhesive additive is added, dispersible latex powder 1.5%, water retaining agent 0.4%, calcium formate 1%, heavy calcium 15%, Portland cement 42.5 35%, fine sand 47.1%.

[0048] Comparative Example 2

[0049] No tile adhesive additive is added, starch ether 0.5%, dispersible latex powder 1.5%, water retaining agent 0.4%, calcium formate 1%, heavy calcium 15%, Portland cement 42.5 35%, fine sand 46.6%.

[0050] The tile adhesive is stirred and formed according to the stirring equipment and stirring method specified in JC / T 547-2017 "Ceramic Tile Adhesive", and then the performance detection of 200g tile sliding distance, 500g tile sliding distance, tensile bonding strength, tensile bonding strength after immersion, tensile bonding strength after heat aging, tensile bonding strength after freeze-thaw cycle, and tensile bonding strength after 20min air setting is carried out according to the standard.

[0051] In addition, the tensile bonding strength after standing for 40 min is detected according to the tensile bonding strength after standing for 20 min in JC / T 547-2017 Ceramic Tile Adhesive, and only the standing time is extended from 20 min to 40 min.

[0052] The viscosity detection result is tested and fitted by a rheometer.

[0053] The above-mentioned comparative examples of the present application are detected for various performances as shown in the following table:

[0054]

[0055]

[0056] The cement-based ceramic tile adhesive has shrinkage in the front and rear stages, which is easy to cause the tensile bonding strength to decrease, so the 45d tensile bonding strength, the 60d tensile bonding strength, the 120d tensile bonding strength and the 180d tensile bonding strength are detected to monitor the influence of the micro-expansion component B on the tensile bonding strength of the cement-based ceramic tile adhesive.

[0057] The above-mentioned comparative examples of the present application are detected for various performances as shown in the following table:

[0058] (the "28d tensile bonding strength" in the following table is the "tensile bonding strength" in the above table)

[0059]

Claims

1. A tile adhesive additive, characterized by, The composition and ratio are as follows: Light component A 95-100%, Micro-expansion component B 0.001-5%, Water reducing agent 0.001-5%, Defoaming agent 0.001-5%, The composition in the light component A comprises any one of perlite, vitrified microbead, light sand, light fly ash, silica ash and a mixture of two or more of them in any ratio; and the particle size range is 0.5-3mm and the dry bulk density is 50-500kg / m 3 ; The micro-expansion component B is a calcium-magnesium composite expansion agent, wherein the MgO content should not be less than 30% and should not be greater than 50%. The application of the tile adhesive additive is used for cement-based tile adhesive to improve the anti-slippage performance of the tile adhesive, and the dosage accounts for 0.5-2% of the total mass of the cement-based tile adhesive.

2. Tile adhesive additive according to claim 1, characterized in that The water reducing agent is any one or a mixture of two or more kinds in any ratio among polycarboxylate water reducing agent, melamine water reducing agent, naphthalene water reducing agent and lignin water reducing agent.

3. The tile adhesive additive according to claim 1, characterized in that, The defoaming agent is any one or a mixture of two or more kinds in any ratio among polyether, high-carbon alcohol, oil and fat, and silicon defoaming agent.

4. Process for the preparation of the tile adhesive additive according to any one of claims 1 to 3, characterized in that, The light component A, micro-expansion component B, water reducing agent and defoaming agent of the tile adhesive additive are added into a mixer in proportion, and are fully stirred and uniformly mixed to obtain the required cement-based tile adhesive additive with anti-slippage performance.

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