KR20130115075A - Method for manufacturing coating concrete block - Google Patents

Abstract

PURPOSE: A production method of a coating concrete block is provided to improve durability by preventing invasion of contaminants while reinforcing a slip preventing function on a surface by forming multi-coating layers on the surface of the concrete block. CONSTITUTION: A production method of a coating concrete block includes the following steps; a first pressurization and molding step which pressurizes and molds a first mixture which mixes 300-700 parts by weight of a first aggregate, 20-35 parts by weight of water, and 0.5-5 parts by weight of admixture per 100 parts by weight of cement; a tamping step which hardens rotating a circular roller with a diameter of 70-110 millimeter with a speed ranged 200-800 rpm to disperse the aggregate stably; a second pressurization and molding step which pressurizes and molds a second mixture in which 1-3 parts by weight of water repellant by stuffing into a mold frame with a molded product which is pressurized and molded for the first time; a first washing water spray step which sprays washing water with water pressure less than 30-80kgf/cm^2 on a surface of the molded product to form an irregular bumpy surface after the first pressurization and molding step; a second washing water spray step which sprays the washing water with the water pressure of 2-10 kgf/cm^2 on the surface of the molded product on which the first washing water is sprayed; a mold product curing step which cures the molded product which is pressurized and molded; a molded product polishing step which polishes the surface of the molded product; a sand and shot blast treatment step in which sands and/or metal balls are sprayed on the surface of the molded product; an intermediate water application step which applies intermediate water (NaHCO_3) with 5% of concentration on a product surface for prevention of whiteout and which tramps with a pressure of 0.05-0.22 MPa; and a molded product coating step which forms a lower surface coating layer, a middle surface coating layer, and an upper surface coating layer, which are multiple coating layers, with a uniform thickness of 0.1-50 micro meter on the surface of the molded product using a roller on which a coating liquid is smeared in which a photo catalyst is mixed to dry with rapid ultra violet rays. [Reference numerals] (S71) First pressurization and molding step; (S72) Tamping step; (S73) Second pressurization and molding step; (S74) First washing water spray step; (S75) Second washing water spray step; (S76) Mold product curing step; (S77) Molded product polishing step; (S78) Sand and shot blast treatment step; (S79) Intermediate water application step; (S80) Molded product coating step

Description

METHOD FOR MANUFACTURING COATING CONCRETE BLOCK [0001]

The present invention relates to a method for producing a coated concrete block, and more particularly, to a method for producing a coated concrete block in which multiple coating layers are formed on a sidewalk block.

Generally, concrete blocks are constructed for pedestrian walk, car, and landscape, and a plurality of blocks are regularly installed according to the width and length of the vehicle.

As a conventional technique related to such a concrete block, the present applicant has proposed in "Method of manufacturing a concrete block (patent registration publication: 10-0783085) ".

First, as shown in FIG. 1, a first concrete composition in which sand, water, cement, stone and gravel are mixed is charged into a predetermined mold frame, followed by compression molding to form a primary molding (S31) A second molding composition is prepared by charging a car molding with a second concrete composition containing sand, water, cement, copper slag, color aggregate, and pigment into a mold frame and compression molding.

Subsequently, cleaning water is injected onto the surface of the secondary molding before curing to perform a primary cleaning water injection process for forming irregularity of many irregularities (S33). Then, cleaning water is injected at a pressure lower than that in the primary cleaning water injection processing Thereby performing a secondary cleaning water jetting process for forming irregularity of many irregularities. Then, the secondary molded product subjected to the secondary washing water spraying treatment is made into a concrete block after curing (S35) at 20 to 60 DEG C for 4 to 8 hours

However, in such a conventional technique, since the water absorption rate of the concrete block surface with respect to the external material is high, contaminants easily penetrate into the concrete block and become vulnerable to contamination, thereby resulting in a problem that the durability of the concrete block is deteriorated.

It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as adhering to the prior art already known to those skilled in the art.

Korean Patent Registration Bulletin: No. 10-0783085

An object of the present invention is to provide a method of manufacturing a coated concrete block capable of enhancing a slip prevention function on the surface and preventing intrusion of contaminants and improving durability.

In order to accomplish the above object, the present invention provides a method for producing a coated concrete block, comprising: mixing 100 parts by weight of cement with 300 to 700 parts by weight of a primary aggregate, 20 to 35 parts by weight of water and 0.5 to 5 parts by weight of an admixture, A primary press-molding step in which the mixture is put into a mold and subjected to pressure molding; A rolling step of rotating the round roller having a diameter of 70 to 110 mm at 200 to 800 rpm so that the aggregate can be stably dispersed; A secondary mixture obtained by mixing 300 to 700 parts by weight of a secondary aggregate, 20 to 35 parts by weight of water, 0.5 to 5 parts by weight of an admixture, and 1 to 3 parts by weight of a waterproofing and water repellent agent with respect to 100 parts by weight of cement is mixed with a primary- And a secondary press forming step of applying pressure molding to the mold; A primary washing water injection step of spraying cleaning water under a water pressure of 30 to 80 kgf / cm ² on the surface of the molded product so as to form irregular uneven surfaces after the secondary pressing step; A second rinse water injection step for spraying rinse water under a water pressure of 2 to 10 kgf / cm ² on the surface of the molded article sprayed with the first rinse water; A molding curing step of curing the pressure-formed molding; A step of polishing the surface of the molded article; A sand and a shot blasting treatment step of spraying sand and a metal ball on the surface of the molding; A middle layer water application step in which a 5% middle layer water (NaHCO ₃ ) is applied to the surface of the product in a thickness of 400 g / m ² and the pressure is adjusted to 0.05 to 0.22 MPa to prevent whitening; And a mold coating step of forming a bottom coating layer, an intermediate coating layer and an upper coating layer, which are multiple coating layers, on the surface of the molded product to a uniform thickness of 0.1 to 50 탆 using a roller coated with a coating solution mixed with a photocatalyst to enable rapid drying of ultraviolet rays do.

The primary aggregate includes at least one selected from natural aggregates or recycled aggregates of 13 mm or less.

The secondary aggregate includes 5 to 50 parts by weight of fine aggregate having a particle size of 1.2 mm or less in size with respect to 100 parts by weight of the primary aggregate and 50 to 95 parts by weight of natural aggregate or recycled aggregate having a particle size of 1 to 4 mm in particle size .

In the molding coating step, the surface temperature of the block is preheated to 40 to 60 degrees, the UV drying heat amount of 250mg / ㎡ ~ 450mg / ㎡ for the bottom and middle surface coating, the UV dry heat amount of 1000mg / ㎡ ~ 2000mg / ㎡ for the upper surface coating It is characterized by the addition of.

According to the present invention, the following remarkable effects can be realized.

First, by forming multiple coating layers on the surface of a concrete block, the present invention has the advantage of enhancing the anti-slip function on the surface, while preventing intrusion of contaminants and improving durability.

Second, the present invention is advantageous in that when the secondary aggregate for secondary press forming is injected, the coating layer is firmly formed on the surface of the concrete block by using the fine aggregate to improve the adhesion of the coating liquid to the surface of the concrete block .

Third, the present invention has an advantage that a waterproof function of a concrete block can be realized by firmly and uniformly forming multiple coating layers on the surface of a concrete block.

Fourth, the thickness of the upper surface layer of the block is made uniform by putting it between the primary press forming and the secondary press forming, and there is an advantage that the aggregate having a large particle size according to the particle size can be prevented from being pushed to one side of the block .

Fifth, there is an advantage that the whitening can be prevented by using the middle layer water.

Sixth, there is an advantage that the efficiency of the coating operation can be improved by using the waterproofing and water repellent agent and the photocatalyst.

1 is a block diagram showing a method of manufacturing a concrete block according to the prior art;
2 is a block diagram illustrating a method of manufacturing a coated concrete block according to a first embodiment of the present invention.
3 is a block diagram illustrating a method of manufacturing a coated concrete block according to a second embodiment of the present invention.
4 is a block diagram illustrating a method of manufacturing a coated concrete block according to a third embodiment of the present invention.
5 is a block diagram illustrating a method of manufacturing a coated concrete block according to a fourth embodiment of the present invention.
6 is a block diagram illustrating a method of manufacturing a coated concrete block according to a fifth embodiment of the present invention.
7 is a block diagram illustrating a method of manufacturing a coated concrete block according to a sixth embodiment of the present invention.
8 is a block diagram illustrating a method of manufacturing a coated concrete block according to a seventh embodiment of the present invention.

In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The method of manufacturing a coated concrete block according to the present invention can firmly and uniformly form multiple coating layers on the surface of a concrete block to prevent slippage while preventing intrusion of contaminants.

Particularly, in order to firmly adhere the multiple coating layers to the surface of the concrete block, the components constituting the concrete block must be constituted at a proper mixing ratio. To confirm this, the inventor has undergone numerous trial and error, Of the components are the most suitable.

2 is a view illustrating a method of manufacturing a coated concrete block according to a first embodiment of the present invention.

As shown in Fig. 2, the present invention according to the first embodiment is characterized in that the first press molding step S11, the second press molding step S12, the molding curing step S13, .

Specifically, in the primary press forming step S11, a primary mixture obtained by mixing cement, primary aggregate, water, and an admixture is put into a mold, and the primary mixture injected into the mold is vibrated while being vibrated.

The primary mixture charged into the mold is composed of 300 to 700 parts by weight of the primary aggregate, 20 to 35 parts by weight of water and 0.5 to 5 parts by weight of the admixture, based on 100 parts by weight of the cement. When the mixing ratio exceeds or falls outside the above-mentioned mixing ratio, the mixing ratio may be adjusted within a range satisfying the mixing ratio described above since the strength may be weaker than the reference value. When the mixing ratio is satisfied, the cost reduction and the required strength can be satisfied.

The primary aggregate may be selected from among natural or recycled aggregates of 13 mm or less, or a mixture of natural aggregate and recycled aggregate. The admixture is intended to improve the properties before and after concrete curing. It exhibits high dispersing and wetting action on the cement particles to improve the surface aspect of the block and improve the filling capacity by improving the unit volume mass. In addition, The absorption rate is remarkably reduced and the intrusion of water into the block is suppressed. In this embodiment, the admixture includes a dispersant, an air entraining agent, and a waterproofing agent.

The secondary press forming step (S12) is a step of preparing a secondary mixture prepared by mixing cement, secondary aggregate, water, and an admixture, placing the prepared secondary mixture together with the primary press- do.

Here, the secondary mixture to be injected into the mold is composed of 300 to 700 parts by weight of the secondary aggregate, 20 to 35 parts by weight of water and 0.5 to 5 parts by weight of the admixture, based on 100 parts by weight of the cement, When the mixing ratio exceeds the above-mentioned mixing ratio, the physical properties of the concrete block may be lowered. Therefore, the mixing ratio should be controlled within a range satisfying the mixing ratio described above. If the mixing ratio is not satisfied, The adhesive strength and durability of the resin composition deteriorate.

The secondary aggregate is composed of fine aggregate, natural aggregate and recycled aggregate. Preferably, the secondary aggregate comprises 5 to 50 parts by weight of fine aggregate having a particle size of 1.2 mm or less in particle size with respect to 100 parts by weight of the primary aggregate, and 50 to 95 parts by weight of natural aggregate or recycled aggregate having a particle size of 1 to 4 mm do. If the mixing ratio of the secondary aggregate exceeds or exceeds the above-mentioned mixing ratio, the adhesion force to the surface of the concrete block becomes weak, so that a uniform and intimate coating layer can not be formed on the surface of the concrete block. Therefore, Lt; / RTI > If the mixing ratio is not satisfied, since the coating liquid is used in a large amount, the manufacturing cost of the cost increase may be increased.

The molding curing step (S13) cures the pressure-molded secondary molding in a conventional manner of vapor-curing or dry-curing. In this embodiment, the pressure-molded secondary molded product is cured at 20 to 60 DEG C for 4 to 8 hours. If the curing condition is not satisfied, degradation of quality such as strength reduction and whitening may occur.

In the molded article coating step (S14), a coating liquid is applied to the surface of the cured molding product several times to form multiple coating layers on the surface of the molded article. At this time, a uniform coating layer can be formed on the surface of the molded product by rolling the roller bearing the coating solution on the surface of the molded product. Preferably, multiple coating layers are formed on the surface of the molded product to a thickness of 0.1 to 50 탆.

For example, when a double coating layer is formed on the surface of a molding, the double coating layer may be composed of a bottom coating layer directly coated on the surface of the molding and a top coating layer coated on the bottom coating layer. When a triple coating layer is formed on the surface of a molded product, the triple coating layer is formed by a bottom coating layer directly coated on the surface of the molding, an intermediate coating layer coated on the bottom coating layer, ≪ / RTI >

3 is a view illustrating a method of manufacturing a coated concrete block according to a second embodiment of the present invention.

As shown in Fig. 3, the present invention according to the second embodiment is characterized in that the first press molding step S21, the second press molding step S22, the molded product curing step S23, the sand and shot blasting step S24), and a molded body coating step (S25). The primary press molding step S21, the secondary press molding step S22, the molding curing step S23 and the molded product coating step S25 are the same as the first pressing molding step S11 described in the first embodiment, The secondary press molding step S12, the molding curing step S13, and the molding material coating step S14, detailed description thereof will be omitted.

However, in the second embodiment, after the molded article curing step (S23), the surface of the molded article is subjected to a sand and shot blast treatment step (S24).

The sand and shot blast treatment step S24 forms a plurality of irregular irregularities on the surface of the molded article by spraying sand and fine metal balls having fine particles on the surface of the cured molded article.

For example, the molded product cured through the mold curing step S23 is put into a short blast machine comb bear (not shown), and the molded product can be polished by a stainless steel short ball injected in a mechanical comb bear have. As a result, the cement and impurities on the surface of the concrete block are removed by the shot ball, so that the whitening of the concrete block is prevented and the commerciality of the concrete block can be improved by processing the soiled surface.

4 is a view illustrating a method of manufacturing a coated concrete block according to a third embodiment of the present invention.

As shown in Fig. 4, the present invention according to the third embodiment is characterized in that the first pressing step S31, the second pressing step S32, the molded article curing step S33, the molded article polishing step S34, And a molding coating step S35.

In the third embodiment, after the molded article curing step (S33), a molded article polishing step (S34) for polishing the surface of the molded article is performed.

The molded article polishing step (S34) can roughly express the texture on the surface of the concrete block by polishing the surface of the molded article after the molded article curing step (S33), and prevent slippage on a smooth surface. It was confirmed that, even when the particle size of the abrasive grindstone is increased to 800, the abrasive effect of the molded body according to the present embodiment is good.

5 is a view illustrating a method of manufacturing a coated concrete block according to a fourth embodiment of the present invention.

As shown in Fig. 5, the present invention according to the fourth embodiment is characterized in that the first press molding step S41, the second press molding step S42, the molded article curing step S43, the molded article polishing step S44, A sand and short-blast treatment step S45, and a molding coating step S46.

In the fourth embodiment, after the molded article curing step (S43), a molded article polishing step (S44) for polishing the surface of the molded article and a sand and short blast treatment step (S45) are performed on the surface of the molded article.

The molded article polishing step (S44) polishes the surface of the molded article after the molded article curing step (S43) to prevent sliding against the smooth surface of the concrete block. In the sand and shot blast treatment step S45, sand having fine particles and spherical metal balls are sprayed on the surface of the cured molding to form irregularities on the surface of the molding.

6 is a view illustrating a method of manufacturing a coated concrete block according to a fifth embodiment of the present invention.

As shown in Fig. 6, the present invention according to the fifth embodiment is characterized in that the first press molding step S51, the second press molding step S52, the first cleaning water injection step S53, A spraying step S54, a molding curing step S55, and a molding coating step S56.

In the fifth embodiment, the primary cleaning water injection step (S53) and the secondary cleaning water injection step (S54) are performed after the secondary pressure forming step (S52).

In the primary washing water injection step S53, washing water under a water pressure of 30 to 80 kgf / cm ² is sprayed on the surface of the molding to form irregular irregularities on the concrete block. In the secondary washing water injection step, Cleaning water under a water pressure of 2 to 10 kgf / cm ² is sprayed on the surface of the molded article to remove impurities on the surface of the molded article.

7 is a view illustrating a method of manufacturing a coated concrete block according to a sixth embodiment of the present invention.

As shown in Fig. 7, the sixth embodiment of the present invention is characterized in that the present invention is characterized in that the first pressure molding step S61, the second pressure molding step S62, the primary cleaning water injection step S63, A spraying step S64, a molding curing step S65, a sand and shot blasting treatment step S66, and a molding coating step S67.

In the sixth embodiment, the primary washing water injection step (S63) and the secondary washing water injection step (S64) are performed after the secondary pressure forming step (S62), and after the molded article curing step (S65) The blast processing step S66 is performed.

The primary cleaning water injection step S63 and the secondary cleaning water injection step S64 are the same as the primary cleaning water injection step S53 and the secondary cleaning water injection step S54 described in the fifth embodiment , The sand and shot blast processing step S66 are the same as the sand and shot blast processing step S24 described in the second embodiment.

8 is a view illustrating a method of manufacturing a coated concrete block according to a seventh embodiment of the present invention.

As shown in FIG. 8, the method for producing a coated concrete block of the present invention includes a one-pressing step S71, a pressing step S72, a second pressing step S73, a first washing water injection step (Step S74), the secondary washing water injection step S75, the curing step S76, the polishing step S77, the sand and shot blasting step S78, the middle layer water applying step S79, .

In the primary press forming step S71, a primary mixture obtained by mixing 300 to 700 parts by weight of the primary aggregate, 20 to 35 parts by weight of water and 0.5 to 5 parts by weight of the admixture with respect to 100 parts by weight of the cement is charged into a mold and pressure- Process.

Step S72 is a process of compacting a circular roller having a diameter of 70 to 110 mm at a rotation speed of 200 to 800 rpm so that the aggregate can be stably dispersed. The circular roller has a constant thickness of the upper surface (colored side) of the block And prevents the phenomenon that the aggregate having a large particle size according to the particle size is tilted to one side and functions to disperse such aggregate.

In addition, the supplied aggregate is dispersed in a flat state before the secondary press-molding, thereby improving the quality of the product and minimizing the thickness deviation.

When the size and rotation of the circular roller deviate from the above-mentioned numerical value range, there is a problem that the aggregate adheres to the roller to cause a dent groove on the block surface, thereby increasing the defect rate.

The secondary press forming step (S73) is a secondary press forming process of the consolidated aggregate, wherein 300 to 700 parts by weight of the secondary aggregate, 20 to 35 parts by weight of water and 0.5 to 5 parts by weight of admixture , 1 to 3 parts by weight of a water-proofing agent and a water-repellent agent is added to a mold together with a primary press-molded molding to press-mold the mixture.

The waterproofing and water repellent agent completely removes the moisture on the block surface, thereby improving the coating efficiency in the molded article coating step S81 described later.

The first washing water spraying step (S74) and the second washing water spraying step (S75) are respectively the secondary pressure after the molding step, an irregular concave-convex surface is the surface of the molded product ^{30 ~ 80kgf / cm 2, 2} ~ 10 to form kgf / cm < ² > under water pressure.

On the other hand, after the molded article curing step (S76), the polishing step (S77), the sand and shot blast treatment step (S78), the middle layer water applying step (S79) is performed.

The middle layer coating step (S79) is a process of applying 5% middle layer (NaHCO ₃ ) to the surface of the product to 400g / m ² thickness to prevent whitening and compacting at 0.05 ~ 0.22MPa pressure.

In the molding process (S80), multiple coating layers such as a bottom coating layer, an intermediate coating layer and a top coating layer are formed to a uniform thickness of 0.1 to 50 탆 on the surface of a molded article using a roller coated with a coating solution containing a photocatalyst to enable rapid UV drying The photocatalyst functions to coagulate the coating liquid and activate the molecules to prevent the damage of each interlayer coating work surface which occurs when the coating liquid is undried after mass production of the product.

In the molding coating step (S80), the block surface temperature is preheated to 40 ~ 60 degrees, UV drying heat amount of 250mg / ㎡ ~ 450mg / ㎡ at the bottom and middle surface coating, UV drying heat amount of 1000mg / ㎡ ~ at the top coating It is preferable to add at 2000 mg / m 2. If it is out of this numerical range, there is a problem that the adhesion between the respective layers is lowered, resulting in poor adhesion and durability.

As described above, according to the present invention, by forming multiple coating layers on the surface of a concrete block, durability can be improved while enhancing the anti-slip function on the surface, the waterproof function of the concrete block can be realized, The coating layer can be firmly formed on the surface of the concrete block by improving the adhesion force of the coating liquid.

Although the present invention has been described in detail using the preferred embodiments, the scope of the present invention is not limited to the specific embodiments, and should be interpreted by the appended claims. It will also be appreciated that many modifications and variations will be apparent to those skilled in the art without departing from the scope of the present invention.

S31, S41, S51, S61, S71: primary press forming step
S72: Go to step
S32, S42, S52, S62, S73: Secondary pressure forming step
S33, S43, S76: Mold Curing Step
S34, S44, S77: Step of polishing the molded product
S35, S46, S56, S67, S80: Mold coating step
S45, S66, S78: Sand and shot blast treatment step
S53, S63, S74: primary washing water injection step
S54, S64, S75: secondary washing water injection step
S55, S65: Mold curing step
S79: middle layer water application step

Claims (4)

A primary press molding step in which a primary mixture obtained by mixing 300 to 700 parts by weight of primary aggregate, 20 to 35 parts by weight of water and 0.5 to 5 parts by weight of an admixture with respect to 100 parts by weight of cement is charged into a mold and subjected to pressure molding;
A rolling step of rotating the round roller having a diameter of 70 to 110 mm at 200 to 800 rpm so that the aggregate can be stably dispersed;
A secondary mixture obtained by mixing 300 to 700 parts by weight of a secondary aggregate, 20 to 35 parts by weight of water, 0.5 to 5 parts by weight of an admixture, and 1 to 3 parts by weight of a waterproofing and water repellent agent with respect to 100 parts by weight of cement is mixed with a primary- And a secondary press forming step of applying pressure molding to the mold;
A primary washing water injection step of spraying cleaning water under a water pressure of 30 to 80 kgf / cm ² on the surface of the molded product so as to form irregular uneven surfaces after the secondary pressing step;
A second rinse water injection step for spraying rinse water under a water pressure of 2 to 10 kgf / cm ² on the surface of the molded article sprayed with the first rinse water;
A molding curing step of curing the pressure-formed molding;
A step of polishing the surface of the molded article;
A sand and a shot blasting treatment step of spraying sand and a metal ball on the surface of the molding;
A middle layer water application step in which a 5% middle layer water (NaHCO ₃ ) is applied to the surface of the product in a thickness of 400 g / m ² and the pressure is adjusted to 0.05 to 0.22 MPa to prevent whitening; And
And a mold coating step of forming a bottom coating layer, an intermediate coating layer and an upper coating layer, which are multiple coating layers, on the surface of the molded article to a uniform thickness of 0.1 to 50 탆 using a roller coated with a coating solution mixed with a photocatalyst so as to be capable of drying ultraviolet rays rapidly ≪ / RTI >
The method according to claim 1,
Wherein the primary aggregate comprises at least one selected from natural aggregates or recycled aggregates of 13 mm or less.
The method according to claim 1,
The secondary aggregate includes 5 to 50 parts by weight of fine aggregate having a particle size of 1.2 mm or less in size with respect to 100 parts by weight of the primary aggregate and 50 to 95 parts by weight of natural aggregate or recycled aggregate having a particle size of 1 to 4 mm in particle size Wherein the method comprises the steps of:
The method according to claim 1,
In the molding coating step, preheat the block surface temperature to 40 ~ 60 degrees,
Wherein the ultraviolet drying heat amount is from 250 mg / m 2 to 450 mg / m 2 at the bottom and middle side coating, and the ultraviolet drying heat amount is from 1000 mg / m 2 to 2000 mg / m 2 at the top side coating.

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