KR101524979B1

KR101524979B1 - Composition for coloring the surface of concrete

Info

Publication number: KR101524979B1
Application number: KR1020140063062A
Authority: KR
Inventors: 김동규
Original assignee: 주식회사 우리산업개발
Priority date: 2014-05-26
Filing date: 2014-05-26
Publication date: 2015-06-02
Also published as: JP2017520500A; CN105272357B; CN105272357A; WO2015182916A1; JP6382351B2

Abstract

A composition for coloring a surface of concrete according to the present invention comprises: 8 wt% of a dye for coloring having the size of 0. 01-1 nm; 45 wt% of a diluent prepared by mixing ion exchange water and ethylene glycol in the weight ratio of 7:3; 7 wt% of methacrylic acid methyl ester; 0.06 wt% of polydimethylsiloxane; 0.5 wt% of fluoropolymer; 6 wt% of colloidal silica; and 25 wt% of modified silicate. According to the present invention, PH of a colored surface is 11 to 13, whereby a concrete surface has the same alkaline as a concrete of alkali component having a Ca[OH]_3 hydroxyl group and the concrete surface is colored by a permeation of the concrete to a depth of 2-3 mm, thereby having a solid surface and aesthetic appearance. Also, the concrete surface is given with a semi-permanent durability and stable implementation of a color, and agglomeration of a material or stains or a color development caused by separating a color or coloring are not occurred.

Description

[Technical Field] The present invention relates to a concrete surface coloring composition,

The present invention relates to a concrete surface coloring composition and, in particular, is applied to a concrete surface in a concrete surface polishing process, thereby imparting a permanent durability to the concrete surface while achieving stable color development. In addition, And a concrete surface coloring composition which does not cause a color development phenomenon and exhibits a clear color.

In general, the strength of concrete is determined by the ratio of water to cement, the amount of cement used and the proportion of admixture, and the size of aggregate. However, it is not easy to satisfy the conditions such as freeze-thaw resistance and durability determined by the concrete specification standard by the above factors alone. Therefore, many attempts have been made to meet the requirements for extending the life of concrete through concrete pouring, curing, finished plastering, and concrete surface treatment. Ironically, concrete can not function properly if it is not properly treated, finished, and cured.

Concrete floors can cause large and small cracks before and after construction due to the characteristics of the concrete itself and external physical and chemical environmental conditions. It is also caused by abrupt drying and shrinkage in the process of curing after pouring of concrete. These cracks eventually lead to deterioration such as detachment and carbonation of the concrete. Particularly, when the cracks are further enlarged due to penetration of moisture or other oxidative substances into the minute cracks, the deterioration phenomenon is increased.

In order to solve these problems, the surface of the concrete is polished and strengthened. In this case, the surface of the concrete is weakened due to the failure of the surface treatment, do. Even when a colorant is used, color development is difficult, and there is a lot of difficulty in construction due to unevenness of coloring and uneven coloring. In addition, the polishing work itself is difficult due to the dependence on expensive imported products, or the undeveloped products and the poor technology.

Also, in order to prevent the deterioration of the concrete floor and the rough surface, the coating film construction using epoxy, urethane, inorganic or organic paint is performed. There are many problems such as cracking, peeling, peeling, and cracking of the coating film, so that it is considered that it is not preferable as the construction to prevent the deterioration of the concrete floor and the rough surface.

In Korean Patent No. 920672 (Oct. 9, 2009), a filler is filled in a cracking site, a surface strengthening agent is allowed to penetrate the surface of the concrete, and then pigment is applied to the surface of the concrete, A surface strengthening agent is applied to the surface of the concrete, thereby ensuring the surface durability of the concrete and achieving the surface painting of the concrete.

However, the above-mentioned Japanese Patent No. 920672 discloses that not only the durability improvement process through the treatment of the filler and the surface strengthening agent and the coloring process through the pigment treatment are troublesome, but also the organic synthesis for the synergistic effect of the two processes is performed directly on the spot Therefore, there is a disadvantage that the field work must be performed very carefully in order to secure reliability.

In particular, the above-mentioned Japanese Patent No. 920672 does not disclose the components and content of the coloring composition which are considered to be most important in the present invention. Since the coloring composition according to the present invention contains a surface strengthening agent in the composition itself, when the coloring composition according to the present invention is used, it is necessary to treat the surface strengthening agent separately from the coloring process as described in the above-mentioned Korean Patent No. 920672 There is no.

On the other hand, Korean Patent No. 948196 (published on Mar. 17, 2010) discloses a color concrete composition. However, the above-mentioned Japanese Patent No. 948196 discloses a method of installing a colored concrete composition on a ground, which is far from the present invention in which a concrete floor is first formed and then colored only to the surface thereof.

Korean Registered Patent No. 920672 (Announced on September 10, 2009) Korean Registered Patent No. 948196 (Announcement of Mar. 17, 2010)

Accordingly, a problem to be solved by the present invention is to apply semi-permanent durability to the concrete floor surface by coating on the surface of the concrete in the process of polishing the surface of the concrete, and at the same time to achieve stable and beautiful color development, The present invention is to provide an environmentally friendly concrete surface coloring composition free from stains or color development phenomena.

The concept of concrete polishing is a floor construction method in which experience has not been accumulated because of the short period of time it has been introduced in Korea, and it is still in trial and error. The Applicant has proposed the present invention in the hope that the coloring composition according to the present invention contributes greatly to the upgrading of the concrete polishing construction method and becomes a cornerstone of many advanced technologies to be produced in the future.

According to an aspect of the present invention, there is provided a concrete surface coloring composition,

8 wt% of coloring dyes of 0.01 to 1 nm in size, 45 wt% of a diluent prepared by mixing ion-exchanged water and ethylene glycol in a weight ratio of 7: 3, 7 wt% of methacrylic acid methyl ester, 0.06 wt% of polydimethylsiloxane, 0.5 wt% of a polymer, 6 wt% of colloidal silica, and 25 wt% of a modified silicate.

Here, the water is preferably ion-exchanged water, and the alcohol is preferably a divalent alcohol.

It is preferable that the organic and inorganic pigments are composed of powders of 100 nm to 1 탆 and the dye is composed of powders of 0.01 to 1.0 nm.

According to the present invention, the surface colored part has a pH of 11 to 13 and has the same alkaline property as the concrete of an alkali component having a hydroxyl group of Ca [OH] ₃ , and is colored by penetration of 2 to 3 mm, Is completed. In addition, a permanent durability is imparted to the surface of the concrete, and at the same time stable color development is achieved, and there is no occurrence of stains or coloring phenomenon in the aggregation of the materials, unusual coloring and coloring.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a photograph for explaining a disadvantage of conventional coating film construction;
FIG. 2 is a photograph showing the surface coloration when the coloring composition according to the present invention is used;
3 is a photograph for explaining the content of the coloring agent;
4 is a photograph for explaining the content of the modified silicate as the penetration enhancer.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are merely provided to understand the contents of the present invention, and those skilled in the art will be able to make many modifications within the technical scope of the present invention. Therefore, the scope of the present invention should not be construed as being limited to these embodiments.

The concrete surface coloring composition according to the present invention is characterized by comprising 7 to 9 wt% of a colorant consisting of an oil, an inorganic pigment or a dye, 40 to 50 wt% of a diluent composed of water or alcohol or a mixture thereof, 6 to 8 wt% 0.05 to 0.07 wt% of polydimethylsiloxane, 0.4 to 0.6 wt% of fluoropolymer, 5 to 7 wt% of colloidal silica, and 20 to 30 wt% of modified silicate.

The coloring agent is the most important factor for the surface coloring of concrete, and not only the color but also the addition ratio plays an important role. The addition rate of the coloring agent may affect the strength of the concrete, and since the coloring effect may vary depending on the mixing method and the mixing time even in the same mixing ratio, the composition according to the present invention, And there should be no color separation or release. For this purpose, the organic and inorganic pigments are preferably composed of powders of 100 nm to 1 μm, and the dye is preferably composed of powders of 0.01 to 1.0 nm.

If the amount of the coloring agent is too high, the effect of color development due to agglutination may be deteriorated. If the amount of coloring agent is too small, color development may be insignificant, so an appropriate amount should be applied considering the content of other components.

The diluent occupies the greatest number of moles in the composition according to the present invention. In the present invention, it is preferable to use monohydric alcohols such as ethanol or dihydric alcohols such as ethylene glycol, polyethylene glycol, methyl glycol and the like rather than trihydric alcohols such as glycerol. This is because, in the case of a divalent alcohol, it is preferable for dissolving other components due to chemical affinity. In the case of water, it is preferable to use ion exchange water in order to increase the solubility.

Methacrylic acid esters are resistant to acids and alkalis. They have the advantage of preventing fire accidents due to flame retardancy and are harmless to human body, so they are environmentally friendly because they do not cause on-site disasters due to toxic gas during construction. Although the price is somewhat expensive, it is an essential element for achieving excellent color in the present invention.

The polydimethylsiloxane has a viscosity of 5 to 300 cps and serves as a defoaming agent as well as acting as a surfactant to increase the dispersing ability due to the specific surface area characteristics. The dispersing ability by the surfactant is important enough to influence the performance of the entire composition.

Polydimethylsiloxane has heat resistance and cold resistance, is physically and chemically stable, has moisture ductility, and can be used for ultraviolet curing. The polydimethylsiloxane works in close contact with the concrete surface but does not have an organic side because of its good ventilation, which can be regarded as a highly desirable functionality as a blend.

Fluoropolymers are resistant to changes in lubricity and environment with low coefficient of friction and have excellent compatibility with various types of resin solutions. It is colorless and transparent, has water-repellent, oil-repellent, and firming functions, and is clean and environment-friendly because it is harmless to the human body.

The colloidal silica is a colloidal SiO ₂ As particles, they have a size of 10 ^-7 to 10 ^-5 mm which can not pass under semipermeable conditions. This enhances tackiness, prevents stains, helps maintain gloss, and acts as a dehumidifier. It is also chemically harmless to the human body and environmentally friendly. It penetrates deeply into the concrete, reacts with Ca [OH] ₂ , maintains its alkalinity and chemical stability, and forms Si-O-Si bond.

Modified silicates react with concrete to have durability, chemical stability and surface gloss. This is an indispensable factor due to the nature of the concrete surface to maintain high hardness. As a result, the concrete surface has reinforced properties.

[Example 1]

Methacrylic acid methyl ester as a colorant and a greenish green dye consisting of a powder of 0.01 to 1.0 nm was used. However, the present invention is not limited thereto, and an inorganic pigment or an organic pigment composed of a powder of 100 nm to 1 탆 May be used. As a diluent, ion exchange water and ethylene glycol were mixed in a weight ratio of 7: 3. The weight ratio thereof may be adjusted depending on the specific situation, and only water or dihydric alcohol may be used.

The ratio of green dye to green dye, diluent (water + ethylene glycol), methyl methacrylate, polydimethylsiloxane, fluoropolymer, colloidal silica and modified silicate in the weight ratio of 8: 45: 7: 0.06: 0.5: The mixture was mixed using an automatic stirrer, at which time the total amount of the composition was 1 liter.

The concrete pouring specimen was made to proceed at room temperature under the condition of 15 MPa for 15 days curing, and the coloring composition according to Example 1 was applied to the surface of the specimen using a soft brush after surface grinding and polishing. Characterization was carried out after 10 hours of drying time after application.

Fig. 2 is a photograph of a chart of results for Example 1, and Table 1 is a characteristic evaluation result chart. Fig.

Characteristic evaluation result table Item Unit and Condition characteristic Remarks anger
crane
enemy
room
Hum PH PH7.5
Using distilled water PH 11.3 chloride
Ion concentration Kg / m ² 69 depth
40nm water
Lee
enemy
room
Hum Compressive strength KSF2730
KN / cm ² 750 Surface tension KSM ISO304
dyn / cm ² 250 Exfoliation KSF2466
Schmidt Hammer Measurements 0 White powder X: Bad / △: Normal / O: Excellent O Polish A luminometer (100 under the condition of tetrahedral mirror) 85 Crack state Judgment by the naked eye
X: Bad / △: Normal / O: Excellent O Penetration depth Judgment by the naked eye
Unit: mm 2.5 Color development Judgment by the naked eye
X: Bad / △: Normal / O: Excellent O

The physicochemical test according to Table 1 showed that the test piece was immersed in distilled water and the PH measurement value was alkaline, and the concrete surface chemically matched with the alkali component (PH 11-13) of the lower layer, and the strength and the spreadability of the material were also good. It was judged to have strengthened properties due to the absence of peeling and whitening, and the gloss was also excellent. The cracks were not visible and penetrated to an appropriate depth of 2-3 mm, and it was found that the excellent surface was completed as shown in Fig.

If the surface penetration depth of the composition is too shallow, coloration may occur after coloring, cracking may occur without strengthening and protection due to shallow penetration of the material. On the other hand, if the penetration depth of the composition is too deep, there is a difficulty in penetration, but the color representation is dark and the composition is unnecessarily over consumed.

[Comparative Example 1]

The amount of the coloring agent relative to Example 1 was relatively reduced. In other words, the weight ratio of green oil green dye, diluent (water + ethylene glycol), methacrylic acid methyl ester, polydimethylsiloxane, fluoropolymer, colloidal silica and modified silicate is 1: 45: 7: 0.06: 0.5: .

[Comparative Example 2]

The amount of the coloring agent relative to Example 1 was relatively increased. In other words, the weight ratio of green oil green dye, diluent (water + ethylene glycol), methacrylic acid methyl ester, polydimethylsiloxane, fluoropolymer, colloidal silica and modified silicate is 12: 45: 7: 0.06: 0.5: .

[Comparative Example 3]

The amount of denatured silica acting as a penetration enhancer is relatively smaller than that of Example 1. In other words, a greenish green dye, a diluent (water + ethyleneglycol), methacrylic acid methyl ester, polydimethylsiloxane, fluoropolymer, colloidal silica and modified silicate are mixed at a weight ratio of 8: 45: 7: 0.06: 0.5: .

[Comparative Example 4]

The amount of the modified silicate serving as the penetration enhancer is increased relative to that of the first embodiment. In other words, a greenish green dye, a diluent (water + ethyleneglycol), methacrylic acid methyl ester, polydimethylsiloxane, fluoropolymer, colloidal silica and modified silicate are mixed at a weight ratio of 8: 45: 7: 0.06: 0.5: .

Table 2 summarizes the component contents of Example 1 and Comparative Examples 1 to 4.

ingredient Mixing ratio (weight ratio) Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Example 1 Green B Green dye One 12 8 8 8 Water + ethylene glycol 45 45 45 45 45 Methacrylic acid methyl ester 7 7 7 7 7 Polydimethylsiloxane 0.06 0.06 0.06 0.06 0.06 Fluoropolymer 0.5 0.5 0.5 0.5 0.5 Colloidal silica 6 5 5 5 6 Modified silicate 25 25 10 45 25

Fig. 3 is a view for explaining the content of the coloring agent, Fig. 3a is for Comparative Example 1, and Fig. 3b is for Comparative Example 2. Fig.

In the case of Comparative Example 1, the mixed material was soft, and a pigment deficiency phenomenon appeared in the mixing process. Also, when the coating was applied, a situation in which the coloring matter was present as shown in FIG. 3A was produced.

In the case of Comparative Example 2, due to the use of an excessive coloring agent, there was a slight aggregation phenomenon during the mixing of the materials, and the composition was not smoothly spread upon application, and was not uniformly applied. Also, as shown in Fig. 3B, the color was too dark and the surface was not dull, and a grayish color was expressed.

In the case of Example 1, when the mixed material was visually observed, there was no mold release, and the material was integrated. As shown in FIG. 2, when the application was carried out, there was no lump of the material, and it spread smoothly.

FIG. 4 is a graph for explaining the content of modified silicate as a penetration enhancer. FIG. 4A is a comparative example 3, and FIG. 4B is a comparative example 4.

In the case of Comparative Example 3, no particular problem was found during the mixing of the materials, but when the application was performed as shown in FIG. 4A, the material spreads thinly on the surface and appears to be a color. However, the penetration is weak, Fit down.

In the case of Comparative Example 4, a slight aggregation was observed in the course of mixing of the mixed materials. This is because the property of the reinforcing agent is due to penetration, and when the amount of the reinforcing agent is increased, the penetration is considered to be good. However, since a slight problem has occurred in the mixing process, there is a possibility that the mixed material is separated during long storage. There was a lump. Also unsuitable as a sanitizer.

As described above, the present invention is effective when each component is mixed in an appropriate amount. The coloring composition prepared according to the present invention has no problem in the mixing of the materials, has stability, exhibits excellent color during coloring, gives a semi-permanent durability to the surface of the concrete, No color development phenomenon occurs.

Claims

8 wt% of coloring dyes of 0.01 to 1 nm in size, 45 wt% of a diluent prepared by mixing ion-exchanged water and ethylene glycol in a weight ratio of 7: 3, 7 wt% of methacrylic acid methyl ester, 0.06 wt% of polydimethylsiloxane, 0.5 wt% of polymer, 6 wt% of colloidal silica, and 25 wt% of modified silicate.

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