KR20060104461A - Dry polymer coating composition containing useless tire rubber chip and manufacturing method of the composition - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polymer coating material containing waste tire rubber, and to a method for producing the same, comprising 10 to 20 parts by weight of waste tire rubber powder, 25 to 40 parts by weight cemented carbide, and 10 to 20 calcium carbonate. Provided are a method for producing a dry polymer coating material containing waste tire rubber, comprising adding 4 parts by weight to 4 parts by weight and shrinkage reducing agent, and a polymer coating material produced by the production method. When the polymer coating material according to the present invention is applied to the surface of the concrete structure, it is possible to secure the excellent watertightness while high adhesion to the concrete structure can not only enhance the durability of the concrete structure but also reduce the working time through the reduction of the curing time It can shorten and work even in wet conditions. Especially, if you mix water in the field, you can get useful effects that can be used easily by anyone.

Description

Dry polymer coating composition containing useless tire rubber chip and manufacturing method of the composition

The present invention relates to a polymer coating material applied to the surface of the concrete structure in order to enhance the durability of the concrete structure or to increase the watertightness of the concrete structure, and more particularly, the high adhesion to the concrete structure when applied to the surface of the concrete structure As it can secure excellent watertightness, it can not only improve the durability of concrete structure, but also shorten the hardening time, which can shorten the working time, and it is possible to work even in wet conditions. The present invention relates to a dry polymer coating material containing waste tire rubber, and a method for producing the same.

In general, various structures manufactured using concrete are exposed to various special physical and chemical environmental conditions, which have direct or indirect effects on the concrete structure.

For example, most concrete installations are often exposed to moisture, and come into contact with moisture even by rain, which causes deterioration of concrete structures, which significantly lowers durability. In addition, when a concrete structure comes into contact with carbon dioxide in the air or is exposed to salinity in an area such as the marine environment, carbon dioxide or a salt component penetrates into the concrete and corrodes the reinforcing steel in the concrete structure. The phenomenon which promotes peeling occurs, and as a result, the life of the concrete structure is shortened.

Polymeric coatings have been applied to most concrete structures in order to extend the life of the concrete structure from a series of phenomena as described above. In this way, when the coating material is applied to the surface of the concrete structure, water, salt, carbon dioxide, and the like can be prevented from penetrating into the concrete structure, thereby preventing the durability of the structure from being degraded due to corrosion of the rebar.

Conventional coating materials used for coating concrete surfaces have mainly used organic epoxy resins or acrylic resins. However, these organic coating materials have a problem in that adhesion due to heterogeneous physical properties with concrete is dropped off the surface of the concrete or the coating film is destroyed. In addition, when the concrete structure is in a water-containing state, since it is not bonded to the surface of the concrete structure, there is a disadvantage that the construction must be completed after completely drying the concrete.

In order to solve the above problems, the inorganic polymer coating material obtained by mixing the inorganic material and the polymer has been coated on the surface of the concrete structure. However, there is still a problem in that the lifting force on the adhesive surface occurs due to the poor adhesion between the concrete structure and the coating material. There is a problem that the durability of the concrete structure is not sufficiently improved due to insufficient watertightness.

In addition, the existing inorganic polymer coating material is used to transport the raw materials to the construction site, and then mix and use them at the proper mixing ratio, so that the construction is complicated, the working time is long, and the curing time takes more than 24 hours, so 24 hours after work It has a disadvantage that the above dry curing process is required.

Accordingly, the present invention is to solve the above problems, it is possible to ensure excellent watertightness while high adhesion to the concrete structure when applied to the surface of the concrete structure can not only increase the durability of the concrete structure but also hardening time It can shorten the working time by shortening, and it is possible to work even in the wet state. Especially, the method of manufacturing polymer coating material containing waste tire rubber that anyone can easily prepare and use the coating material by mixing water in the field. The purpose is to provide.

It is another object of the present invention to provide a dry polymer coating containing waste tire rubber produced by the above production method.

In order to achieve the above object, the present invention provides a method for producing a dry polymer coating material based on a polymer, 10 to 20 parts by weight of waste tire rubber powder, 25 to 40 parts by weight cemented carbide, It provides a method for producing a dry polymer coating material containing waste tire rubber, characterized in that 10 to 20 parts by weight of calcium carbonate and 4 to 7 parts by weight of shrinkage reducing agent are added.

In addition, the present invention is produced by the above production method, 10 to 20 parts by weight of waste tire rubber powder, 25 to 40 parts by weight cemented carbide, 10 to 20 parts by weight of calcium carbonate and shrinkage reducing agent based on 100 parts by weight of polymer. It provides a dry polymer coating containing waste tire rubber, characterized in that it comprises 4 to 7 parts by weight.

The dry polymer coating material prepared as described above can be easily used by anyone who mixes water in the field, and the waste tire rubber powder and cemented carbide cement can enhance the adhesion between the polymer and the surface of the concrete structure and help ensure excellent watertightness. give.

Hereinafter, the polymer coating material according to the present invention will be described in more detail through the preparation method as follows.

The polymer coating material according to the present invention comprises 10 to 20 parts by weight of waste tire rubber powder, 25 to 40 parts by weight of cemented carbide, 10 to 20 parts by weight of calcium carbonate and 4 to 7 parts by weight of shrinkage reducing agent, based on 100 parts by weight of polymer. Include.

The polymer coating material of the above composition is made so that anyone can easily use it by mixing only a certain ratio of water at the site to be constructed in consideration of usability and workability, so that the polymer is easily re-emulsified and dispersed when water is mixed at the site. Re-emulsified powder resin is used as a polymer.

Here, the reemulsifying powder resin is re-emulsified when water is mixed in the field to act as an aqueous polymer dispersion, thereby forming a network structure during the curing process to improve the water resistance. The re-emulsifying powder resin can be selected and used from those commonly used, preferably using an acrylic resin in consideration of the adhesion to the concrete structure, the particle size of 4 to 9 in consideration of rapid re-emulsification It is preferable to use the one which is 탆.

The waste tire rubber powder has excellent compatibility and binding property with the polymer, so that the coating layer can be firmly adhered to the surface of the structure by the interaction with the superhard cement which is added, and the sufficient watertightness is secured. Help me do it.

In this case, when the particle size of the waste tire rubber powder is more than 0.4mm, it is difficult to obtain a coating layer having a uniform surface when coating on the concrete surface, and there is a problem of decreasing the watertightness of the coating material, and the particle size is less than 0.001mm. If it is used, since the mixing is difficult due to the fine powder at the time of the bibim, there is a problem of poor workability, it is preferable to use the waste tire rubber powder having a particle size of 0.001 ~ 0.4mm.

The waste tire rubber powder having the above-mentioned particle size is added in an amount of 10 to 20 parts by weight based on 100 parts by weight of the polymer, but when the amount is less than 10 parts by weight, the mixing effect of the waste tire rubber powder is reduced and the adhesion to the concrete surface is reduced. There is a problem that the amount of the polymer is relatively reduced when the addition amount exceeds 20 parts by weight, so that the water tightness is lowered, so it is preferable to use the waste tire rubber powder within the above range.

By interacting with the waste tire rubber powder, the polymer coating layer can be firmly attached to the surface of the concrete structure, and can be rapidly cured to obtain a desired expression strength early, and the coating material can be used even when wet. Superhard cement is added to ensure that

The cemented carbide cement is added to 25 to 40 parts by weight based on 100 parts by weight of the polymer, if the addition amount is less than 25 parts by weight, the curing time is long, the desired strength can not be obtained early, and the adhesion to the concrete surface is poor This occurs, and when the addition amount exceeds 40 parts by weight, the content of the polymer is relatively reduced, resulting in a problem that the water tightness is lowered, it is preferable to add a cemented carbide within the above range.

Calcium carbonate is added in an amount of 10 to 20 parts by weight based on 100 parts by weight of the polymer as a filler. If the amount is less than 10 parts by weight, there is a problem that the strength of the coating layer decreases. It is preferable to add calcium carbonate within the above range because there is a problem that the water-tightness is reduced to reduce.

When the polymer, which is the main material of the coating material, is mixed with water at the site and applied to the surface of the concrete structure, the curing proceeds. In this case, the shrinkage is severely generated. do. In the present invention, 4 parts by weight to 7 parts by weight with respect to 100 parts by weight of the polymer was added.

As described above, when the waste tire rubber powder, superhard cement, calcium carbonate and shrinkage reducing agent are added to the polymer, a dry polymer coating material according to the present invention may be prepared, and additives such as a curing accelerator may be added as necessary. It may also be added.

The dry polymer coating material thus prepared may be marketed by packaging a certain amount, and the polymer coating material may be used as a coating material for concrete structures by dispersing and re-emulsifying the polymer when only a certain amount of water is mixed in the field. This is excellent and can increase the durability of the concrete structure. In addition, as curing is completed within 3 hours, there is an advantage in that the desired strength can be expressed early.

Hereinafter, the present invention will be described in more detail with reference to the following examples, which are only presented to aid the understanding of the present invention, but the present invention is not limited thereto.

<Examples 1 to 13>

Polyethylene glycol was mixed with an acrylic resin having a particle size of 4 to 9 μm, waste tire rubber powder having a particle size of 0.001 to 0.4 mm, cemented carbide, calcium carbonate, and shrinkage reducing agent in the composition of Table 1 to prepare a dry polymer coating material.

5Kg of water per 10Kg of the polymer coating material prepared as described above was measured, and the adhesion strength, water tightness, curing time, and tensile strength were measured by the following method, and the results are shown in Table 2 below.

-Adhesion strength-

Tensile adhesion strength test of the specimen to which the steel shaft was bonded at the cross vector speed of 1 mm / min using the Instron universal testing machine according to JIS A 6916 (the background adjustment material for finishing coating material) was performed.

-Watertightness-

The watertightness test was carried out by the method specified in KS F 4919 (cement mixed polymer waterproofing material). After applying the sample flat to 70 × 70 × 20mm mortar plate with iron trowel or brush roller, the curing room temperature was 20 ±. Under the curing conditions of 3 ° C. and humidity (90 ± 5%), the specimens were cured up to 14 days of age and completely sealed with resins on all four sides except the coated surface.

-Curing time-

In accordance with KS F 2436 (Test method of concrete setting time by penetration resistance needle), the setting time of the specimen was measured.

- The tensile strength -

The tensile strength test of the specimens was carried out according to KS L 5104 (Test Method for Tensile Strength of Cement Mortar).

division Acrylic resin (Kg) Waste tire rubber powder added amount (Kg) Super fast cement (Kg) Calcium Carbonate (Kg) Shrinkage Reducing Agent (Kg) Example 1 10 0.5 3.0 1.5 0.5 Example 2 10 1.0 3.0 1.5 0.5 Example 3 10 1.5 3.0 1.5 0.5 Example 4 10 2.0 3.0 1.5 0.5 Example 5 10 2.5 3.0 1.5 0.5 Example 6 10 1.5 2.0 1.5 0.5 Example 7 10 1.5 2.5 1.5 0.5 Example 8 10 1.5 4.0 1.5 0.5 Example 9 10 1.5 4.5 1.5 0.5 Example 10 10 1.5 3.0 0.5 0.5 Example 11 10 1.5 3.0 1.0 0.5 Example 12 10 1.5 3.0 2.0 0.5 Example 13 10 1.5 3.0 2.5 0.5

division Adhesion Strength (kgf / cm ² ) Water tightness (%) Curing time (minutes) Tensile Strength Over Time 3 hours 7 hours 24 hours 72 hours 168 hours Example 1 28 1.0 45 1.1 1.9 2.6 2.8 2.4 Example 2 36 0.3 38 1.9 2.4 3.1 3.6 4.2 Example 3 35 0.3 40 1.8 2.3 3.0 3.5 4.0 Example 4 33 0.2 40 1.7 2.1 2.8 3.5 4.0 Example 5 28 0.6 56 1.4 1.7 2.0 2.6 2.9 Example 6 22 1.0 60 1.2 1.6 2.0 2.6 2.9 Example 7 34 1.2 62 1.8 2.3 2.9 3.6 4.0 Example 8 35 0.4 36 1.9 2.3 2.9 3.5 4.1 Example 9 28 0.4 35 1.4 1.8 2.1 2.5 2.8 Example 10 25 0.8 50 1.6 1.9 2.2 2.4 2.7 Example 11 33 0.3 45 1.8 2.3 3.0 3.6 3.9 Example 12 32 0.4 47 1.7 2.4 2.9 3.4 3.8 Example 13 26 0.8 50 1.4 1.8 2.3 2.7 2.9

As shown in Table 2, in Examples 1 to 5 in which the coating material was prepared while varying the amount of the waste tire rubber powder added, in Examples 2 to 4 in which the waste tire powder was added within the preferred range of the present invention, the adhesion strength and the water-tightness were obtained. Not only this is excellent, but the curing time is short and the early strength is excellent.

In addition, in Examples 6 to 9, wherein the addition amount of the cemented carbide cement is in the range of the present invention, the adhesion strength and the water-tightness are excellent, and the curing time is short. It can be seen that the early strength is excellent.

In addition, Examples 11 and 12 in which the addition amount of calcium carbonate was added within the scope of the present invention in Examples 10 to 13, wherein the coating material was prepared while changing the addition amount of calcium carbonate, was excellent in adhesive strength and water-tightness, and the curing time was short and early. It can be seen that the strength is excellent.

As described above, the present invention can secure excellent watertightness while having high adhesion to the concrete structure when applied to the surface of the concrete structure, thereby preventing the penetration of water, salt, carbon dioxide, etc. into the concrete structure. Its durability can be improved, and its curing time can be shortened to less than 3 hours, so that it is possible to obtain the desired strength early and to shorten the working time, and it is possible to work even in wet conditions. Anyone can easily use, there is a useful effect of providing a dry polymer coating material containing a waste tire rubber and a method for producing the same easy to use.

Claims (4)

In the manufacturing method of a dry polymer coating material mainly based on a polymer, 10 to 20 parts by weight of waste tire rubber powder, 25 to 40 parts by weight of cemented carbide, 10 to 20 parts by weight of calcium carbonate, and 4 to 7 parts by weight of shrinkage reducing agent are added to 100 parts by weight of polymer. A method for producing a dry polymer coating containing rubber. The method for producing a dried polymer coating material containing waste tire rubber according to claim 1, wherein an acrylic resin having a particle size of 4 to 9 µm, which is a reemulsifying resin, is used as the polymer. The method according to claim 1 or 2, The waste tire rubber powder is a method for producing a dry polymer coating material containing waste tire rubber, characterized in that the particle size of 0.001 ~ 0.4mm used. 10 to 20 parts by weight of waste tire rubber powder, 25 to 40 parts by weight of cemented carbide, 10 to 20 parts by weight of calcium carbonate and 4 to 4 parts by shrinkage reducing agent, prepared by the manufacturing method of claim 1 A dry polymer coating containing waste tire rubber, comprising 7 parts by weight.