KR102008664B1 - High-performance tile joint material including blast furnace slag fine powder - Google Patents

Abstract

The present invention relates to a high-performance elastic joint material composition using blast furnace slag fine powder, which is an industrial by-product, and more particularly, by using blast furnace slag fine powder, which has excellent chemical resistance, and also adds a tripolymer reemulsifying powder resin to provide adhesion strength and The present invention relates to a high-performance tile joint material that improves bending strength and improves water resistance without deteriorating physical properties by using calcium stearate water repellent.
The present invention "white portland cement 40 ~ 60wt%; Blast furnace slag fine powder 2 ~ 10wt%; Vinyl acetate / ethylene / methyl methacrylate terpolymer 2 ~ 4wt% of re-emulificaion type powder resin; Limestone fine powder 5-20 wt%; Dolomite 30-40 wt%; Methyl cellulose 0.04-0.10 wt%; Higher fatty acid metal salts 0.2-1.0 wt%; And white pigment 0.1 ~ 0.5wt%; It provides a high-performance tile joint comprising a.

Description

High-performance tile joint material including blast furnace slag fine powder}

The present invention relates to a high-performance elastic joint material composition using blast furnace slag fine powder, which is an industrial by-product, and more particularly, by using blast furnace slag fine powder, which has excellent chemical resistance, and also adds a tripolymer reemulsifying powder resin to provide adhesion strength and The present invention relates to a high-performance tile joint material that improves bending strength and improves water resistance without deteriorating physical properties by using calcium stearate water repellent.

When cleaning balconies and toilets, chlorine-based bleach hypochlorous acid (NaClO) or reducing bleach sodium hyposulfite (Na ₂ S ₂ O ₄ ) is used to develop strong detergency. Deterioration proceeds.

In the case of joints made of Portland cement, a large amount of Ca (OH) ₂ is produced by hydration of C ₃ S and C ₂ S, which react with sulfate solution to form etringite, resulting in joint expansion, May cause destruction or dissolve upon contact with acid solution.

However, when the blast furnace slag fine powder is mixed with the Portland cement, the production amount of Ca (OH) ₂ decreases, and the produced Ca (OH) ₂ reacts with the blast furnace slag fine powder immediately to form an insoluble CSH gel, thereby increasing acid resistance. . In addition, the microstructure densified by the latent hydraulic reaction of blast furnace slag powder has increased resistance to chloride ion diffusion at 28 days of age, and thus, hypochlorous acid (NaClO) or sodium hyposulfite (Na ₂ S) contained in detergents or bleaches, etc. ₂ O ₄ ) and the like can reduce the deterioration of the joint member.

1. Patent 10-1596816 "Method of treating the surface of concrete structures for water and sewage by applying a composition that can be used simultaneously with the adhesive and joint of the tile" 2. Patent 10-1276084 "Back cement composition and manufacturing method" 3. Patent 10-0904841 "Tile joints for tiles with excellent elasticity and adhesion" 4. Patent 10-1436888 "Tile grout material composition"

The present invention not only improves resistance to deterioration of joints that may be caused by chlorine-based bleach (NaClO), reducing bleach (Na ₂ S ₂ O ₄ ), etc., by using blast furnace slag fine powder, which is an industrial by-product, and in a humid environment and moisture. An object of the present invention is to provide a high-performance tile joint material that is excellent in resistance to exposure, and can withstand the impact applied to the floor surface or the tile with the improved elasticity and adhesion.

The present invention for solving the above-mentioned problems "white portland cement 40 ~ 60wt%; Blast furnace slag fine powder 2 ~ 10wt%; Vinyl acetate / ethylene / methyl methacrylate terpolymer 2 ~ 4wt% of re-emulificaion type powder resin; Limestone fine powder 5-20 wt%; Dolomite 30-40 wt%; Methyl cellulose 0.04-0.10 wt%; Higher fatty acid metal salts 0.2-1.0 wt%; And white pigment 0.1 ~ 0.5wt%; It provides a high-performance tile joint comprising a.

Specifically, the blast furnace slag fine powder is applied to those having a powder degree of 4,000 ~ 5000 ㎠ / g, whiteness of 85 or more,

The tripolymer reemulsifying powder resin is applied to the MFT (Minimum Film Formation Temperature) value of 5 ℃, Tg (Glass Transition Temperature, 12 ℃),

The fine limestone powder is applied to those having a powder degree of 3,000 ~ 5000 ㎠ / g, whiteness of 93 or more,

The dolomite is a mineral phase dolomite (dolomite), 0.2 mm or less in diameter, whiteness is applied to 90 or more,

The methyl cellulose is applied to the viscosity of 35,000 ~ 45,000cps, water 8.0wt% or less, NaCl 2.0wt% or less,

The higher fatty acid metal salt is applied to any one or more of stearic acid-based calcium salts or stearic acid salts with calcium metal salts,

As the white pigment, TiO ₂ having a rutile mineral may be applied.

According to the present invention described above has the following effects.

1. The use of blast furnace slag powder, an industrial by-product, increases resistance to sulfates and chlorides.

2. By applying stearic acid-based calcium salt, one of the higher fatty acid metal salts, excellent water repellency is imparted, and excellent resistance to wet environment and moisture exposure.

3. By applying tripolymer reemulsifying powder resin, the elasticity and adhesion of the joint member are improved, and thus the durability against impact applied to the tile or the base surface to which the tile is attached is improved.

4. All binders, inorganic fillers and functional admixtures constituting the present invention can be produced in powder form as a product packaged in one bag at the factory, thereby improving convenience in construction.

5. In addition, by applying S / P, which is an industrial by-product and is more economical than cement, it is possible to provide economic tile joints compared to general tile joints using only white Portland cement.

The present invention is a white portland cement (hereinafter 'WPC') 40 ~ 60wt%; Blast furnace slag fine powder (hereinafter 'S / P') 2 ~ 10wt%; Vinyl acetate / ethylene / methyl methacrylate terpolymer re-emulificaion type powder resin (hereinafter referred to as “remulsification type powder resin”) 2 to 4 wt%; Limestone fine powder (hereinafter 'LSP') 5-20wt%; Dolomite 30-40 wt%; Methyl cellulose (hereinafter 'MC') 0.04-0.10 wt%; Higher fatty acid metal salts 0.2-1.0 wt%; And white pigment 0.1 ~ 0.5wt%; It provides a high-performance tile joint comprising a.

The WPC, S / P and powder resin are binders.

The WPC may be applied to those used for conventional tile joints or decorations.

The S / P is a powder degree of 4,000 ~ 5000 cm 2 / g, CaO content of 40 to 60wt%, SiO ₂ content of 25 to 35wt%, the whiteness of 85 or more can be applied.

The re-emulsified powder resin is a vinyl acetate / ethylene / methyl methacrylate tripolymer powder resin, excellent in water resistance, abrasion resistance, weather resistance and also excellent affinity with cement. The powder resin may have a MFT (Minimum Film Formation Temperature) value of 5 ° C and a Tg (Glass Transition Temperature) value of 12 ° C.

The LSP and dolomite are inorganic fillers.

The LSP is an inorganic filler, does not participate in the hydration reaction of the binder, and contributes to the improvement of workability of the joint in the form of fine powder. Powders of 3,000 to 5000 cm 2 / g and whiteness of 93 or more can be applied.

The dolomite mineral phase is dolomite (dolomite), the diameter of 0.2mm or less, whiteness of 90 or more can be applied. When applying a diameter of 0.2mm or less, it is possible to achieve optimum workability even for narrow joints of 3 to 4mm or less, and to obtain a smooth and smooth surface after applying the joint material.

The MC, the higher fatty metal salt and the white pigment are functional admixtures.

The MC may be applied to a viscosity of 35,000 ~ 45,000cps, water 8.0wt% or less, NaCl 2.0wt% or less. The MC may contribute to the improvement of the adhesiveness and water retention of the joints, and if the amount added is less than 0.04wt%, the MC may exhibit poor adhesion and water retention, and when the addition amount exceeds 0.10wt%, the workability may be due to excessive viscosity. It is greatly reduced.

The higher fatty acid metal salts are applied to improve the resistance to water absorption and water repellency of tile joints, and stearic acid-based calcium salts, which are combined with metal ions such as zinc and calcium, or calcium stearate salts with calcium metal salts, have good affinity with cement. Any one or more of the above may be applied.

As the white pigment, TiO ₂ having a rutile mineral may be applied.

Hereinafter, the present invention will be described in more detail with reference to Examples. However, this embodiment is for illustrating the present invention in more detail, and the scope of the present invention is not limited to these examples.

1. Review of binder composition of tile joints

In order to derive the appropriate amount of WPC from the tile joints, the compressive strength and the length change according to the amount of WPC were investigated. As shown in [Table 1], tile joints were prepared, and the elastic joint member of Company A was used as Comparative Example 1, and wetted at room temperature at 20 ° C. for 3 days according to the test method of KS L 1592 (Ceramic Ceramic Tile Cement). After curing, after the air curing to the strength measurement was measured the change in compressive strength and length, the results are described in the bottom of [Table 1].

From the results of Table 1, as the amount of WPC used increased, the compressive strength increased and the length change rate also increased. The amount of WPC used to meet the compressive strength standard of KS L 1592 is over 40wt%, and the amount of WPC used to satisfy the length change rate is less than 60wt%. do.

2. Review of binder composition of tile joints

Focusing on Example A-3, which is an appropriate amount of WPC formulation, by adjusting the amount of S / P used in the binder, the compressive strength, length change rate, whiteness, chlorine ion diffusion coefficient, and reduction rate after sulphate immersion according to the amount of S / P used Was reviewed. The whiteness test was conducted using KS L 5113 (whiteness test method for white Portland cement) and the chlorine ion diffusion coefficient was NT BULD 492 (1999). The results are shown at the bottom of [Table 2].

From the results of [Table 2], even using only 2wt% of S / P is improved chlorine ion penetration resistance and sulfate resistance, the resistance was also increased as the amount used increases. On the other hand, the rate of change of length increases as the amount of S / P used increases, and 2 ~ 10wt% of S / P is considered to be suitable as it does not meet the KS standard when more than 15wt% is used. In addition, as the amount of S / P used increased, the whiteness decreased and the compressive strength decreased at 3 days, whereas the 28-day strength increased.

3. White Pigment Usage Review

White pigment (TiO ₂ ) was used in the formulation of Example B-4 in order to solve the problem of lowering the whiteness due to the increase in the amount of S / P used, and the result was described in the lower part of [Table 3].

Whiteness (TiO ₂ ) of white pigment is increased in 0.1wt%, and whiteness is improved up to 0.5wt%, but the white pigment is not improved, so white pigment is used in 0.1 ~ 0.5wt%. It seems to be.

4. Review of re-emulsified powder resin usage

In order to examine the composition of the binder for improving the elasticity and adhesion of the tile joint material, the physical properties of the tile joint agent according to the amount of re-emulsified powder resin were reviewed, focusing on Example B-3. Vinylacetate / ethylene / methylmethacrylate terpolymer powder resin was added as a reemulsifying powder resin, and the results are shown in Table 4 below.

From the results in [Table 4], the flexural strength and the adhesion strength increased even though the compressive strength decreased to 2 to 4wt% of the reemulsified powder resin. Generally, the flexural strength increases in proportion to the increase in compressive strength, but the flexural strength increases despite the decrease in the compressive strength of the tile joint in the result of [Table 4]. It can be seen that the result of the improved bending toughness of the agent.

Claims (8)

White Portland cement 40-60 wt%;
Blast furnace slag fine powder 2 ~ 10wt%;
Vinyl acetate / ethylene / methyl methacrylate terpolymer 2 ~ 4wt% of re-emulificaion type powder resin;
Limestone fine powder 5-20 wt%;
Dolomite 30-40 wt%;
Methyl cellulose 0.04-0.10 wt%;
Higher fatty acid metal salts 0.2-1.0 wt%; And
High performance tile joints containing 0.1 ~ 0.5wt% of white pigment.
In claim 1,
The blast furnace slag fine powder is a high-performance tile joint material, characterized in that the powder degree of 4,000 ~ 5000 ㎠ / g, whiteness of 85 or more.
In claim 1,
The terpolymer reemulsifying powder resin is a high performance tile joint, characterized in that the MFT (Minimum Film Formation Temperature) value is 5 ℃, Tg (Glass Transition Temperature, 12 ℃) value.
In claim 1,
The fine limestone powder is high-performance tile joints, characterized in that the powder degree of 3,000 ~ 5000 ㎠ / g, whiteness of 93 or more.
In claim 1,
The dolomite has a mineral phase dolomite (dolomite), 0.2mm or less in diameter, high-performance tile joints, characterized in that the whiteness of 90 or more.
In claim 1,
The methyl cellulose is a high performance tile joint, characterized in that the viscosity 35,000 ~ 45,000cps, water 8.0wt% or less, NaCl 2.0wt% or less.
In claim 1,
The higher fatty acid metal salt is a high performance tile joint, characterized in that any one or more of stearic acid-based or calcium stearate salts with calcium metal salts combined with metal ions.
In claim 1,
The white pigment is TiO ₂ , high-performance tile joints, characterized in that the mineral phase is rutile (rutile).