JPH0852726A - Coloring material for concrete - Google Patents

Abstract

PURPOSE:To easily color the concrete surface by forming a concrete percolating layer of a specific thickness from composition containing polymer of polyethy lene oxide having specific molecular weight, dye or pigment and fibrous metallic oxide, and adhering it to a base material to be brought into contact with the concrete surface. CONSTITUTION:A concrete percolated layer of 30-200mum is formed of polymer of polyethylene oxide (molecular weigh of about 100,000-5,000,000), due and fibrous metallic oxide. The layer is adhered to the concrete contact surface of a pattern mold frame for concrete of urethane resin. The adherence is effectively executed by employing the polyethylene oxide, and as dispersant spiculisporix acid salt is used to enhance the dispersion of the dye, and percolated in the concrete. The metallic oxide is contained to thicken the composition, adherence is facilitated, and surface hardness is improved. The adhered dye is percolated on the concrete surface, and easily colored on the concrete surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coloring material for concrete.

[0002]

2. Description of the Related Art Recently, it has been frequently practiced to give a concavo-convex pattern to the surface of concrete to improve the appearance of a building or the like. And, the construction method which can be colored at the same time as the construction and the coloring material used for the construction are disclosed in JP-A-6-9275.
It is proposed in Japanese Patent Publication No. 7. The coloring material of the present invention has a concrete permeation layer attached to a base material, and can be naturally colored only by contacting it with the concrete surface before drying.

[0003]

A composition which contains polyethylene oxide, a dye and a pigment as main components and serves as a concrete permeation layer is a liquid. Dripping is likely to occur, workability is poor, and uneven coloring may occur on the concrete surface after coloring. Also, even if it says that the concrete surface is colored, in order to give a natural feel, it is necessary to penetrate the concrete infiltration layer into the concrete rather than simply painting the surface, but it is difficult to sufficiently infiltrate, If this permeation thickness is insufficient, coloring will be insufficient, and it will later come off and cause discoloration.
The first object of the present invention is to provide a coloring material which can be colored naturally by merely contacting it with the concrete surface before drying and which has a stable coloring power. A second object of the present invention is to provide a concrete coloring material which forms a concavo-convex pattern on the surface of concrete and allows the concavo-convex pattern to be naturally colored just by placing concrete, and which has a stable coloring power. It is to be.

[0004]

The first aspect of the present invention is a polyethylene oxide (molecular weight of about 100,000-5) produced by ring-opening polymerization of ethylene oxide.
A composition having (million) polymer, a dye or a pigment or a mixture thereof, and a fibrous metal oxide as main components (hereinafter, these are collectively referred to as "dye") is a concrete infiltration layer. It is characterized in that a concrete permeation layer of 30 to 200 μm is adhered to a base material such as paper, cloth, synthetic resin, plywood or steel plate.

The invention according to claim 2, which is the second invention, is characterized in that the permeation layer of the first invention contains a surfactant produced by a fermentation method and a fluorine-based surfactant. Have. The invention according to claim 3, which is the third invention, is based on the first or second invention, and is made of a foamed resin in which unevenness opposite to the uneven pattern appearing on the concrete surface is formed. It is characterized in that the pattern formwork for concrete is used as a base material. A fourth aspect of the invention is based on the third aspect of the invention, in which a joint projection is formed on a concrete formwork to expose joints that define a unit shape such as rock on the cast concrete surface. It is characterized by doing.

[0006]

Since the first aspect of the present invention is configured as described above, if the concrete permeation layer adhered to the base material is brought into contact with the concrete surface before drying, the moisture content of the concrete will increase the amount of polyethylene oxide. Molecules are dissolved and dispersed,
The dye or the like contained in the permeation layer permeates the surface of the concrete and colors it. Due to the fibrous metal oxide contained in the dye etc., the composition which becomes the concrete permeation layer thickens, does not cause liquid dripping and easily adheres to the base material, and also improves the hardness of the concrete surface after drying. It will be higher. The permeation layer of the second invention contains a surfactant produced by a fermentation method and a fluorinated surfactant. A dye or the like that is highly dissolved and dispersed by a fermentation-based surfactant and a fluorine-based surfactant contained in the permeation layer permeates the surface of the concrete and colors it. Further, in the third and fourth inventions, the concrete surface has an uneven pattern or joints along the unevenness of the pattern mold. Moreover, this uneven pattern is colored by the dye or the like of the concrete permeation layer.

[0007]

EXAMPLE A pattern formwork for concrete according to this example is disclosed in JP-A-59-158825 or JP-A-6-158825.
As in the case of the mold described in JP-A-3-107510, expanded polystyrene, urethane resin or the like was used. Then, a concrete permeation layer made of a dye or the like is thinly attached to the concrete contact surface of the mold. When the concrete is poured, the permeation layer is dissolved and dispersed by the water content in the concrete, permeates the concrete and colors it. Therefore, in order to attach the dye or the like to the concrete contact surface of the concrete formwork, a water-soluble paste must be used. Therefore, polyethylene oxide is used in this example. Further, in order to more effectively permeate the dyes and pigments into the concrete, a dispersant that prevents the aggregation of the dyes and pigments, dispersion improvement of the dyes, etc., and a dispersion liquid dissolved and dispersed by the water in the concrete. A fluorine-based surfactant that lowers the surface tension of was used. As the dispersant, a salt of spiculisporic acid having the structural formula shown in FIG. 1 was used.

The salt of spiculisporic acid does not lower the surface strength of concrete unlike synthetic surfactants, and is excellent in stable dispersibility of dyes or pigments in a high PH range. Also, unlike synthetic surfactants, it has almost no foaming properties, so there is no problem of foaming during coating. The salts of spiculisporic acid are mono-, di-, and tri-sodium salts. Fluorine-based surfactants include fluorinated alkyl esters as nonionic surfactants, perfluoroalkyl salts as anionic surfactants, perfluoroalkylamine salts as cationic surfactants, and perfluoroalkyl salts as amphoteric surfactants. Alkyl betaines can be used, but nonionic and anionic surfactants are preferable. Examples of water-soluble pastes include sodium alginate, carboxymethyl cellulose, hydroxyethyl cellulose, polyvinyl alcohol, dextrin, and modified starch. However, sodium alginate and carboxymethyl cellulose cannot be used because they form an insoluble calcium salt in combination with calcium in concrete.

Polyvinyl alcohol is also unsuitable for use because it readily gels with borax in concrete. Dextrin and modified starch are also unfavorable because they cause mold. On the other hand, polyethylene oxide is different from the above-mentioned pastes in a wide PH region (PH = 4-1 to 1).
In 2), the viscosity is stable, and the diluted solution Tom
The s-effect (reduction of flow frictional resistance) is significantly superior to other pastes. Further, polyethylene oxide has a pseudo-aggregation action of a suspension of clay or silica, and does not reduce the strength of concrete. Furthermore, the hygroscopicity is extremely low at 15% by weight or less even at 95% RH,
Moreover, it has the characteristic that it does not grow mold.

(Experiment 1) Confirmation of effects of dispersant and surfactant A water-soluble composition containing polyethylene oxide and a dye (pigment) as main components, and adding a salt of spiculisporic acid and a fluorinated alkyl ester. Apply a brush or spray to the concrete contact surface of the mold to obtain a thickness of 30 μ to 20 μm.
A colorant is manufactured by applying it to about 0 μm and drying it at room temperature or hot air. The permeation layer of this coloring material is brought into contact with the surface of the concrete before drying to permeate the dye or the like, the colored concrete cross section is observed, and the permeation depth is measured by coloring. (Results) As shown in FIG. 2, the penetration of the dye or the like into the poured concrete penetrates to the depth of about 3 to 4 mm in the general construction concrete without the aid of the penetrant such as the synthetic surfactant. . But to penetrate deeper,
It is necessary to prevent aggregation of the dye or pigment and reduce the surface tension of the aqueous solution. For this purpose, a salt of spiculisporic acid and a fluorinated alkyl ester can be used in combination to penetrate to a depth of 10 to 12 mm. The color density and color tone of the coloring material change depending on the dispersion state of the dye and pigment in the permeation layer. Therefore, preventing coagulation of dyes and the like by using a dispersant such as spiculisporic acid and a fluorinated alkyl ester together with a permeation dispersant is not only for improving the permeation of the permeation layer. It is also useful for ensuring a stable color tone.

(Experiment 2) Confirmation of Effect of Thickener When a concrete permeation layer made of the above water-soluble composition is attached to a pattern form for concrete, if the viscosity of the above composition is low, dripping or coating Thickening agents are used because spots occur and workability and finish are poor. As a fibrous metal oxide as a thickener, potassium titanate fibers were added in an amount of 0.5 to 5.0 wt% with respect to 1 in total of the other compositions. Although K ₂ O.8TiO ₂ is used here, other potassium titanate (K ₂ O.nTiO ₂ : n = 2 to 6) fibers, fibers such as silica and alumina can also be used. The relationship between the added amount of K ₂ O · 8TiO ₂ and the viscosity is shown in FIG. As shown in FIG. 3, the viscosity increases depending on the amount added,
From the workability of attaching to the concrete formwork, the preferable viscosity is about 750 cps to 3000 cps.
Is. If it is too low, dripping will occur, but 3000 cp
If it exceeds s, the resistance becomes too large to spray from the spray hole, or even when applying with a brush, the fluidity is poor and unevenness occurs.

Therefore, the practical amount of K ₂ O.8TiO ₂ added is 0.5 to 3.0 wt%. There is also a method of adding a polymer to thicken the aqueous solution, but when a polymer is used, the permeation layer attached to the concrete formwork is redissolved and dispersed by the water content of the concrete. At that time, it becomes difficult to dissolve. On the other hand, K ₂
If metal oxide fibers such as O.8TiO ₂ are used,
It is possible to increase the viscosity without increasing the content of the organic thickener or using a high molecular weight one. It was also confirmed that the hardness of the concrete surface containing the metal oxide fibers increased.

(Experiment 3) Confirmation of Surface Hardness of Colored Concrete To compare the hardness of the concrete surface, length 45 cm ×
Concrete samples 1 to 3 having a width of 44.5 cm and a thickness of 17 cm are placed with their measurement surfaces facing upward, and
Measurements were made at 20 points with a spacing of 4.5 cm. Sample 1: Uncolored concrete Sample 2: Colored concrete (without metal oxide fiber) Sample 3: Colored concrete (metal oxide (K ₂ O.
8TiO ₂ ) fiber content) The measuring method was hitting with a P-type Schmidt hammer, and the average value of the resilience was defined as the hardness. The results are shown in FIG. 4, and it was confirmed that the hardness of the concrete surface was increased by containing the metal oxide fiber. It is thought that this is because the fibers are entangled inside the concrete to create a strong structure.

3 parts by weight of polyethylene oxide and 12 parts by weight of a dye (pigment) are mixed, 1.5 parts by weight of a salt of spiculisporic acid, and 1.5 of a fluorinated alkyl ester which is a fluorosurfactant. Parts by weight and K ₂ O / 8T
1 part by weight of iO ₂ fiber was added, and water was added to this mixture to make 100, and the mixture was stirred, dissolved and dispersed. The composition thus obtained is attached to a pattern frame for concrete to produce a coloring material for concrete. Usually, when concrete is poured, the water content in the concrete rises due to the phenomenon of bleeding (floating water), but it is possible to move it while raising the dye and the like along with this floating water. Concrete may exhibit a white flower phenomenon, but an anti-white flower agent may be used together with a dye or the like. Further, the concrete permeation layer can be adjusted in the production time of the colorant in accordance with the hardening state of the concrete by changing the production conditions to change the dissolution / dispersion time.

In the above embodiment, only the case where the concrete permeation layer is attached to the concrete formwork has been described, but the concrete permeation layer may be attached to paper, cloth, synthetic resin, plywood or steel plate. For example, if a concrete-penetrating layer is attached to the cloth, the desired coloring can be achieved by applying the cloth to the concrete surface before drying. Further, the concrete permeation layer may be directly attached to a plywood or steel plate concrete panel or the like. Further, the cloth or the like may be attached to a concrete panel for use. In this example,
Although a salt of spiculisporic acid is used as a dispersant, any surfactant prepared by a fermentation method may be used, and a salt of malic acid or the like can also obtain the same effect. Also, the dispersion is improved by using a fluorosurfactant, which is a penetrating dispersant, in combination. The work of attaching the concrete permeation layer made of the above-mentioned water-soluble composition to the pattern formwork for concrete,
Since it can be done on site using a brush and a spray gun, there is no need to worry about being exposed to rainwater or the like before use.

Concrete Example 1 In FIG. 5, a styrofoam layer 2 is attached to one concrete panel 1, and the styrofoam layer 2 is attached.
The pattern form for concrete a is formed by forming the unevenness opposite to the uneven pattern appearing on the concrete surface on the surface of. The formwork a is formed with joint projections 3 for revealing joints that define unit shapes such as rocks on the cast concrete surface. Then, the surface of the styrofoam layer 2 contains a brown pigment of 60 μm.
The concrete permeation layer 4 is attached by a spray gun. The form a thus formed is made to face the concrete panel 5 different from the above, and they are fixed by the fasteners 6. Then, as shown in FIG. 6, concrete consisting of 14% cement, 79% aggregate, and 7% water is placed in the facing interval between the form a and the concrete panel 5, and the form is made 4 days later. When removed, the surface was colored dark brown. This colored layer did not fall off even if it was strongly washed with water. The depth of penetration of the pigment was about 12 mm.

Concrete Example 2 Using the mold a of Concrete Example 1, a composition containing a black dye and a composition containing a white pigment were separately sprayed to form spots to form a concrete permeation layer of 80 μm. did.
Then, concrete was poured and after curing, the form was removed. The resulting retaining wall has a white and black mottled appearance,
Moreover, the boundary of color tone was extremely clear. The penetration depth of the dye and pigment was about 11 mm.

[0018]

According to the first or second aspect of the present invention,
The dye or the like penetrates into the concrete quickly and to a sufficient depth only by bringing the base material into contact with the surface of the concrete containing water, so that the desired coloring can be achieved without impairing the characteristics of the concrete skin. Since polyethylene oxide is used as the water-soluble paste, it does not adversely affect the concrete by generating calcium salt or mold in the concrete or gelling. Further, by using a fluorine-based surfactant that does not reduce the surface strength of concrete, the dye or the like can be deeply penetrated into the concrete. In this way, since the dye or the like penetrates deeply into the concrete, even if the concrete surface is exposed to rain, for example, the color does not come off.

Further, by containing the fibrous metal oxide, the composition forming the permeation layer is thickened and easily adhered to the substrate, so that the workability is improved and the coloring property is stable. To do. Furthermore, the structure formed by the metal oxide fibers also increases the hardness of the concrete surface after drying. In particular, according to the invention of claim 2, a surfactant and a fluorine-based surface active agent produced by a fermentation method having a low foaming property, a large buffering property, and a stable surface active effect in a high PH range. Since it is used together with the agent, the dispersion of the dye or the like can be stabilized. According to the third aspect of the present invention, the pattern formwork for concrete is used as the base material. Therefore, by using this formwork, it is possible to color the concrete only by placing it. According to the fourth aspect of the invention, since the joint pattern formwork, which is the base material, is formed with the joint projections for showing the joints for partitioning the unit shapes such as rocks. While making the formed unit shape close to natural stone, it can be colored with a color close to natural stone. Therefore, even with concrete, it is easy to create a wall surface that looks like piled up natural stones.

[Brief description of drawings]

[Figure 1] Spicrisporic acid (4,5-Dicarboxy-4-pen
tadecanolide) is a chemical structural formula.

2 is a measurement result of Experiment 1. FIG.

3 is a measurement result of Experiment 2. FIG.

4 is a measurement result of Experiment 3. FIG.

FIG. 5 is a cross-sectional view of a concrete formwork and a concrete panel before placing concrete.

FIG. 6 is a cross-sectional view of a state in which concrete is placed between the formwork and the panel of FIG.

[Explanation of symbols]

 a Concrete pattern formwork 2 Styrofoam layer 3 Joint projection 4 Concrete penetration layer 5 Concrete panel

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[Procedure amendment]

[Submission date] August 15, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

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[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 4

[Correction method] Change

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[Figure 4]

Claims (4)

[Claims] 1. A polyethylene oxide produced by ring-opening polymerization of ethylene oxide (molecular weight: about 100,000 to 500).
10,000) polymer, a dye or pigment or a mixture thereof, and a fibrous metal oxide as a main component as a concrete permeation layer, and a concrete permeation layer with a thickness of 30 to 200 μm is used for paper, cloth, synthetic A coloring material for concrete that is attached to a base material such as resin, plywood or steel plate. 2. Polyethylene oxide produced by ring-opening polymerization of ethylene oxide (molecular weight: about 100,000 to 500).
10,000) polymer, dye or pigment or a mixture thereof, a surfactant prepared by a fermentation method as a dispersant for the dye or pigment, a fluorosurfactant as a permeation dispersant, and a fibrous metal. A coloring material for concrete, comprising a composition containing an oxide as a main component as a concrete permeation layer, and adhering a concrete permeation layer of 30 to 200 μm to a substrate such as paper, cloth, synthetic resin, plywood or steel plate. 3. The concrete pattern frame made of a foamed resin, having a concavo-convex pattern opposite to the concavo-convex pattern appearing on the cast concrete surface, as a base material.
The coloring material for concrete described. 4. The concrete formwork according to claim 3, wherein a pattern formwork for concrete is used as a base material, in which a joint projection is formed on the cast concrete surface to expose joints for partitioning a unit shape such as rock. Coloring material.