KR101829391B1

KR101829391B1 - method for producing foamed color concrete

Info

Publication number: KR101829391B1
Application number: KR1020150190378A
Authority: KR
Inventors: 안재용; 최유심; 안행수
Original assignee: 안재용; 최유심; 안행수
Priority date: 2015-12-30
Filing date: 2015-12-30
Publication date: 2018-02-14
Also published as: KR20170079619A

Abstract

The present invention relates to a method of producing a color concrete molded article, and more particularly, to a method of manufacturing a color concrete article, which is capable of producing various patterns and colors by controlling vibration of a mortar mixed with a plasticizer and a pigment, And a method of manufacturing a molded article.
A method of manufacturing a color concrete formed article according to the present invention includes a mixing step of mixing mortar with cement, aggregate, water, a plasticizer and a pigment; a molding step injecting step of injecting mortar into a molding mold; And a curing step of curing the mortar by injecting the mortar into the curing case after separating the mold from the vibration molding machine or the vibration conveyor.

Description

TECHNICAL FIELD The present invention relates to a method for producing a foamed color concrete,

The present invention relates to a method of producing a color concrete molded article, and more particularly, to a method of manufacturing a color concrete article which is capable of producing various patterns and colors by controlling vibration of a mortar mixed with a plasticizer and a pigment to control the dispersibility of the pigment, And a method of manufacturing a molded article.

In order to improve the gray appearance of concrete, methods of using pigments in the manufacturing process have been used.

Since the use of pigments has a problem of lowering the strength characteristics of concrete, color concrete is mainly used in flooring materials such as roads. In the case of the flooring, not only is the required strength lower than that of the structure, but also the color concrete can be applied to the surface of the road separately, so that the overall strength is easily maintained, and the cost problem is less depending on the use of the pigment.

Methods for coloring concrete for structures requiring high strength are also being developed.

In Korean Patent No. 10-0588192, a white color concrete structure capable of realizing concrete of white color and at the same time having a required strength and durability to meet the requirements of a designer or a structure, ㎥, unit mass of aggregate of 700 ~ 980 ㎏ / ㎥, unit of coarse aggregate of 900 ~ 1000 ㎏ / ㎥, weight ratio of water-binder of 35.0 ~ 50.0%, fine aggregate fraction of 45.0 ~ 50.0 By weight based on the total weight of the binder and 5 to 10% by weight of a titanium oxide-based white pigment based on the binder, wherein the binder is white cement.

Korean Patent Laid-Open No. 10-2005-0098606 discloses that the weight ratio of water-cement is 30.0 to 50.0%, the fine aggregate ratio is 40.0 to 50.0%, the inorganic concrete pigment or iron oxide is 5 to 10% by weight based on the cement, (Carbon Black) is added in an amount of 0.3 to 2% by weight based on cement.

However, the conventional techniques have a problem in that they can produce only a single color, and the strength of the concrete is not so high, so there is a problem in that it can not be used as a concrete product such as a tile or a block requiring high strength.

1. Korean Registered Patent No. 10-0588192: White Color Concrete Composition 2. Korean Patent Publication No. 10-2005-0098606: Black color concrete composition

The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a method of manufacturing a mortar which is capable of easily producing various patterns and colors by controlling vibration of a mortar mixed with a plasticizer and a pigment, And a method for manufacturing a color concrete molded article.

In order to accomplish the above object, the present invention provides a method of manufacturing a color concrete molding comprising mixing a cement, an aggregate, water, a plasticizer and a pigment to obtain a mortar; A molding die injection step of injecting the mortar into a molding die; Vibrating the mortar with the vibrating molding machine or the vibrating conveyor and vibrating the mortar injected into the molding machine; And a curing step of separating the molding frame from the vibration molding machine or the vibration conveyor and then charging the curing cure into the curing case.

20 to 40 parts by weight of water is mixed with 100 parts by weight of the cement, the plasticizer is 0.2 to 2% by weight of the total weight of the mortar, and the pigment is 0.2 to 2% by weight of the total weight of the mortar .

And the curing step is characterized by forming a negative pressure inside the curing case and curing it.

Wherein the curing step cures while heating the curing case using a heater installed in the curing case.

And a building finish material is placed on the mortar layer formed inside the mold after the injection molding step.

In order to accomplish the above object, the present invention provides a method for producing a color concrete molded article, which comprises mixing a cement, an aggregate, water, a plasticizer and a pigment to obtain a mortar, wherein a mixing step of obtaining two or more kinds of mortars mixed with pigments of different colors Wow; A molding die injection step of injecting the two or more types of mortar into a molding die; Vibrating the molding frame with a vibration molding machine or a vibration conveyor to compose the mortar injected into the molding frame and adjusting the dispersion and mixing of the different pigments to form colors and patterns; And a curing step of separating the molding frame from the vibration molding machine or the vibration conveyor and then charging the curing cure into the curing case.

Wherein the molding die injection step injects the two or more types of mortar simultaneously into the molding die.

Wherein the molding die injection step sequentially injects the two or more types of mortar into the molding die according to each type.

According to another aspect of the present invention, there is provided a method of manufacturing a color concrete formed article, comprising: mixing a cement, an aggregate, water, and a plasticizer to obtain a mortar; A mold injection step of adding the pigment to the mortar and then injecting the mold into a mold; Vibrating the molding frame with a vibration molding machine or a vibration conveyor to compose the mortar injected into the molding frame and adjusting the dispersion of the pigment to form a color and a pattern; And a curing step of separating the molding frame from the vibration molding machine or the vibration conveyor and then charging the curing cure into the curing case.

As described above, according to the present invention, it is possible to easily produce various patterns and colors by controlling the dispersibility of the pigment by applying vibration to the mortar mixed with the plasticizer and the pigment.

In addition, the use of a plasticizer reduces the amount of water used and ultimately increases the strength of the material. The dispersibility of the material makes it possible to spread the material uniformly. As a result, the aggregate spreads evenly without vibration, After the particles are uniformly filled and cured, the surface of the final product is smoothly formed so as to shine along the outline of the molding die, so that the decorative property can be added.

In addition, since vibration is applied to the mortar before curing, the strength of the concrete formed body can be increased.

Fig. 1 is a schematic view showing a state in which a first mortar and a second mortar are mixed and injected into a mold,
FIG. 2 is a view schematically showing a state where the first mortar and the second mortar are injected simultaneously into a mold without mixing them, and FIG.
FIG. 3 is a schematic view showing a state in which the first mortar and the second mortar are sequentially injected into the mold without mixing them, and FIG.
4 is a view showing a state in which a building finish material is overlaid on a mortar layer injected into a mold,
5 is a cross-sectional view showing the inside of a curing case applied to an embodiment of the present invention,
FIG. 6 is a view of a concrete molded body manufactured using monochromatic mortar,
FIG. 7 is a view of a concrete molded body manufactured using mortar of two colors,
FIG. 8 is a view of a concrete molded body manufactured using four colors of mortar.

Hereinafter, a method of manufacturing a color concrete molding according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

A method of manufacturing a color concrete molded body according to an embodiment of the present invention includes mixing a cement, an aggregate, water, a plasticizer, and a pigment to obtain a mortar, injecting a mortar into a mold, A vibrating step of vibrating the forming mold by vibrating the forming mold with a vibrating conveyor to consolidate the mortar injected into the forming mold, and a curing step of curing the mold by separating the forming mold from the vibration molding machine or the vibration conveyor, . Each step will be examined in detail.

1. Mixing step

Cement, aggregate, water, plasticizer and pigment are mixed to obtain a mortar.

Conventional Portland cement may be used as the cement.

Aggregate can be coarse or fine aggregate. The cement to aggregate may be mixed in a weight ratio of 1: 0.5 to 4.

The mixing amount of water, plasticizer and pigment is very important in the present invention for producing a color concrete molded article.

If the amount of water is large, the flowability of the mortar can be ensured, but the strength of the molded body after curing is greatly reduced and the porosity is excessively increased, and the surface is hardly formed smoothly. If the amount of water is small, the flowability of the mortar is reduced, and the mixing property of the pigment is lowered and the workability is greatly reduced. The amount of water used in the production of conventional concrete products is 50 parts by weight or more based on 100 parts by weight of cement.

The amount of water used in the present invention is preferably 20 to 40 parts by weight based on 100 parts by weight of the cement. This is less water than conventional concrete products. In the present invention, the deterioration of the fluidity caused by the reduction of the amount of water is solved by using a plasticizer.

The plasticizer serves as a dispersant to improve the dispersibility of the cement particles and the pigment particles to improve the flowability of the mortar. By improving the fluidity, it is possible to easily control the dispersion and mixing of the pigments in the vibration compaction process to be described later. It is possible to easily discharge the air over the proper amount in the inside of the mortar to the outside and to evenly improve the bonding force of the particles, Not only greatly increases the strength of the molded body but also improves the spreadability of the pigment, which is useful for hatching the color.

The amount of plasticizer used in the present invention is 0.2 to 2 wt% of the total weight of the mortar. If the amount of the plasticizer is less than 0.2% by weight, the flowability of the mortar is deteriorated. If the amount is more than 2% by weight, separation of the material of the concrete formed body is caused and the strength is lowered.

As plasticizers, superplasticizers such as naphthalene-based, polycarboxylic acid-based, melamine-based, lignin-based and high-performance AE water reducing agents can be used.

An inorganic or organic pigment may be used as the pigment. The amount of pigment used in the present invention is 0.2 to 2 wt% of the total weight of the mortar. The pigment preferably has the same content as the plasticizer.

Cement, aggregate, water, plasticizer, and pigment are mixed at a certain ratio to make mortar. The mortar made has a specific color by the pigment. Alternatively, the present invention can be made by first mixing mortar with cement, aggregate, water, and plasticizer, and then adding the pigment to the mortar.

Meanwhile, the present invention can prepare two or more kinds of mortars having different colors using different pigments. Two or more types of mortar can be prepared by making the same amount of materials and materials as each other but different pigment. For example, a red mortar may be prepared by mixing a first mortar mixed with a pigment and a second mortar mixed with a blue pigment.

The present invention also relates to a method for preparing a concrete molding having high reflectivity or light-emitting properties by preparing a mortar in which a brightener, a glass powder, a luminous material or the like is further mixed to provide various functions in addition to cement, aggregate, water, plasticizer and pigment Of course.

2. Injection Molding Step

Once the mortar is ready, inject it into the mold.

The forming mold can be formed in various forms according to the size and shape of the concrete molding body. Further, a mold that is flexible with a mold can be used.

It goes without saying that various patterns may be formed on the inner surface of the forming mold to express the pattern on the surface of the concrete molding. In this case, the pattern is formed on the inner surface of the forming die by a depressed or embossed shape.

Further, if a mold release agent is applied to the inner surface of the mold before injecting the mortar, or if a molding frame (polyethylene or polycarboxylate material) having a smooth surface is used, a concrete molded body whose surface is smooth as a tile can be produced.

On the other hand, when two or more colors of the mortar are used, they can be injected at the same time or at different times. For example, the second mortar mixed with the first mortar mixed with a specific pigment and the pigment different in color can be injected into the mold at the same time. In addition, the first mortar may be injected into the molding die first and the second mortar may be injected into the molding die sequentially.

Further, the first mortar and the second mortar can be mixed and injected into the mold. In this case, in order to produce various colors and patterns, it is preferable that the first mortar and the second mortar have a partially mixed state, not a completely mixed state. In the mixed mortar in which the first mortar and the second mortar are partially mixed, the color of the first mortar and the color of the second mortar can be separately observed.

FIG. 1 shows an example in which the first mortar and the second mortar are mixed and injected into a mold.

Referring to FIG. 1, when the first mortar A and the second mortar B are charged into the injection hopper 20 provided at the upper portion of the forming die 10, the first mortar A and the second mortar B are introduced into the injection hopper 20, The mortar (A) and the second mortar (B) are injected into the mold (10) in a mixed state. In this case, the first mortar and the second mortar may be thoroughly mixed and injected into the mold, or may be injected into the mold while partially mixing, by performing appropriate stirring as described above.

2 and 3 show a state in which the first mortar A and the second mortar B are injected into the mold frame 10 at the same time or at different times in a state in which they are not mixed. FIG. 2 shows a state where the first mortar A and the second mortar B are simultaneously injected into the mold 10, and FIG. 3 shows a state in which the first mortar A is injected into the mold 10 After the injection, the second mortar (B) is injected onto the first mortar (A).

3. Vibration Compaction Phase

After the mortar is injected into the mold, vibration is applied to the mold, and the mortar injected into the mold is crushed.

In order to apply vibration to the mold, the mold can be mounted on the vibrator. Further, vibration can be applied in the process of attaching the forming mold to the vibrating conveyor and moving the forming mold for the next process.

The vibration applied to the forming mold can increase the density of the mortar particles and greatly increase the strength of the concrete molded article, together with the effect of discharging the air in the mortar to the outside. If a negative pressure is formed inside the mold while the mold is closed when the mold is vibrated, it is possible to promote the discharge of the air in the mortar, thereby adding a great effect to the compaction. Particularly, a high strength can be maintained even when a concrete compact is manufactured in the form of a thin plate such as a tile.

The present invention can induce the dispersion and mixing of the pigments contained in each mortar by the vibration applied to the mold when two or more types of mortar having different colors are injected into the mold. Therefore, by controlling the frequency and the vibration time, various colors and patterns can be formed by appropriately controlling the dispersion and mixing of different pigments. In this process, the plasticizer contained in the mortar increases the flowability and helps to disperse and mix the pigment easily.

In addition, in the present invention, when a mortar is first prepared by mixing cement, aggregate, water, and a plasticizer, and the pigment is added to the mortar to be injected into the mold, the pigment disperses unevenly in the mortar during the molding of the mold, Accordingly, irregular patterns of various shapes can be formed.

As shown in FIG. 4, the present invention can be applied to a mortar layer formed on the inside of a molding frame 10 before vibration is applied to the molding frame 10 after injection of mortar, The finishing material 30 can be folded up. After the building finish material is superimposed, vibration is applied to the molding frame to crush the mortar. Through this method, it is possible to integrate various kinds of architectural finishing materials with mortar, and it is possible to manufacture a product in which the color of the color is realized on the surface of the architectural finishing material.

4. Curing step

Vibration is applied to the molding frame to cure the mortar and cure.

Separate the mold from the vibratory or vibratory conveyor for curing. The separated mold is put into the curing case and cured.

An example of the curing case is shown in Fig. In order to produce a large quantity of products, a tray 50 is provided inside the curing case 40, and a plurality of casting molds 10 are placed on the tray 50 to be cured. The tray 50 comprises a plurality of struts 51 made of metal bars and a support plate 55 supported by the struts 51.

And the molding frame 10 containing the mortar therein is placed on the support plate 55 at regular intervals. It can be cured at room temperature (20 ~ 30 ℃) for 1 ~ 3 days.

Another method of curing is to cure by adjusting the air pressure and temperature inside the curing case 40. [ For example, by using a vacuum pump 60, a negative pressure is formed inside the curing case 40 to cure it. By forming the inside of the curing case at a negative pressure of 100 to 500 torr, which is lower than the atmospheric pressure, the mortar can be deaerated to promote the compaction and to enhance the strength of the concrete molded body after curing.

At the same time, a heater 70 may be installed in the curing case to cure the air inside the curing case 40 while heating it to about 40 to 60 ° C.

After curing, the mold is moved out of the curing case and a demolding operation is performed to separate the cured concrete molding from the mold.

The concrete formed in this manner has high strength and various colors and patterns are realized on the surface. These concrete formed bodies can be used for various purposes such as concrete tile, concrete block, concrete boundary stone, building finishing material, and interior and exterior materials for construction.

Hereinafter, the present invention will be described by the following examples. However, the following examples are illustrative of the present invention, and the contents of the present invention are not limited by the following examples.

(Example 1)

10 kg of ordinary Portland cement, 20 kg of sand, 3 kg of water, 0.5 kg of polycarboxylic plasticizer (PC-L, MUHU Construction material, China) and 0.35 kg of iron oxide pigment (Jinhe Enterprise, China) were mixed to obtain a mortar. Then, the mortar was injected into a vibration molding machine (HM-110C, Hanmi Automatic Machine, Korea), and vibration was applied for 1 minute and then cured at 25 ° C for 2 days to produce a tile-shaped concrete molding.

Fig. 6 shows four kinds of monochromatic concrete molded bodies produced using pigments of different colors.

(Example 2)

10 kg of ordinary Portland cement, 20 kg of sand, 3 kg of water, 0.5 kg of polycarboxylic plasticizer (PC-L, MUHU Construction material, China) and 0.35 kg of blue iron oxide pigment (Jinhe Enterprise, China) were mixed to obtain a first mortar.

A second mortar was obtained by blending 10 kg of ordinary Portland cement, 20 kg of sand, 3 kg of water, 0.5 kg of polycarboxylic plasticizer (PC-L, MUHU Construction material, China) and 0.35 kg of purple iron oxide pigment (Jinhe Enterprise, China) .

The same amount of the first mortar and the second mortar were simultaneously injected into a molding frame mounted on a vibration molding machine (HM-110C, Hanmi Automatic Machine Co., Ltd., Korea), followed by vibration for 20 seconds, To produce a tile - shaped concrete compact.

Fig. 7 shows a concrete molded body in which two colors are distinguished and appeared on the surface.

(Example 3)

A first mortar was obtained by blending 10 kg of Portland cement, 20 kg of sand, 3 kg of water, 0.5 kg of polycarboxylic plasticizer (PC-L, MUHU Construction material, China) and 0.35 kg of white iron oxide pigment (Jinhe Enterprise, China).

Then, gray second mortar, black third mortar and green fourth mortar were obtained in the same manner as above except that the color of the pigment was different.

The same amount of the first, second, third and fourth mortars were put into a stirrer, and the mixture was partially mixed with stirring. The mixture was injected into a vibration molder (HM-110C, Hanmi Automatic Machinery Co., Followed by curing for 2 days at 25 ° C to produce a concrete shaped body in the form of a tile.

Fig. 7 shows the shape of a concrete molded body in which four colors are mixed to form a pattern and an irregular pattern.

As a result of measuring the compressive strength of the concrete molded body of Example 1 as a sample, it was found to be excellent at 382 kg / cm ² .

A water penetration test was conducted using the concrete molded article of Example 1 as a sample.

Compared with commercial white brick (comparative sample 1), plastic tile (comparative sample 2), and compressed concrete block (fertilizer sample 3) commercially available in the market.

Each sample was placed in a 30 × 50 × 30 cm water tank filled with water, stored for 1 week, and the moisture permeability (%) was measured by calculating the weight change of the sample before and after the test. The experimental results are shown in Table 1 below.

Water permeability (%) = {(weight of sample after test - weight of sample before test) / weight of sample before test)} x 100

division Moisture permeability (%) Example 1 4.4 Comparative sample 1 14.0 Comparative sample 2 11.2 Comparative sample 3 4.6

Referring to the results of Table 1, the water permeability of the concrete molded body of Example 1 was 4.4%, which was almost the same as that of Comparative Sample 3 produced by compressing at high pressure. On the other hand, comparative samples 1 and 2 were found to have a relatively large amount of water penetration as compared with comparative sample 1.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, and that various modifications and equivalent embodiments may be made by those skilled in the art. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

10: forming mold 20: injection hopper
30: Building finish material 40: Curing case
50: Tray 60: Vacuum pump
70: heater

Claims

Mixing a mixture of cement, aggregate, water, plasticizer and pigment to obtain a mortar, wherein two or more kinds of mortars mixed with pigments of different colors are obtained;
A molding die injection step of injecting the two or more types of mortar into a molding die;
Vibrating the molding frame with a vibrating molding machine or a vibrating conveyor to compose the mortar injected into the molding frame and controlling the dispersion and mixing of the different pigments to form colors and patterns in an irregular pattern;
And a curing step of separating the molding frame from the vibration molding machine or the vibration conveyor,
Wherein the mixing step comprises mixing 20 to 40 parts by weight of the water with respect to 100 parts by weight of the cement,
Wherein the curing step is performed by forming a negative pressure inside the curing case to cure the cured concrete.

The method of claim 1, wherein the plasticizer is 0.2 to 2 wt% of the total weight of the mortar, and the pigment is 0.2 to 2 wt% of the total weight of the mortar.

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The method as claimed in claim 1, wherein the curing step cures while heating the curing case using a heater installed in the curing case.

The method as claimed in claim 1, wherein the molding finishing material is overlaid on a mortar layer formed in the molding die after the molding die injection step.

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The method as claimed in claim 1, wherein the injection molding step injects the two or more types of mortar simultaneously into the molding mold.

The method as claimed in claim 1, wherein the injection molding step injects the two or more types of mortar sequentially into the molding mold according to each type.

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