KR100942239B1 - Design concrete pole and manufacturing method thereof - Google Patents

Abstract

PURPOSE: A design concrete pole and a manufacturing method thereof are provided to prevent environmental contamination and discoloration of a wrapping material, and to make various colors, patterns and luster with the wrapping material. CONSTITUTION: A manufacturing method of a design concrete pole includes the following steps: preparing each component(S10); molding a composition in a frame with centrifugal or vibration force(S14); forming an outer layer of keystone concrete by separating a molded product from the frame(S16); and polishing a pattern of the keystone(S18). The composition includes cement 18~23 weight%, sand 26~40 weight%, keystone 31~45 weight% consisting of inorganic minerals or waste glass pieces, a chemical admixture 0.2 weight%, pigment 0.4~1.7 weight%, and water.

Description

Design concrete pole and manufacturing method

The present invention relates to concrete poles that can be applied to concrete poles, communication poles, street lamps, traffic light poles, bollards and the like, in particular, so that the appearance of gloss, patterns, colors and marks due to the ground stone polished on the surface of the concrete poles. One design concrete pole and a method of manufacturing the same.

Conventionally, it was aesthetically uniform because the intrinsic color of cement is expressed as it is before use in concrete poles. In case of painting on concrete surface, color concrete pole is made by adding pigment in consideration of peeling or discoloration. However, the colored concrete poles manufactured in this way had problems such as discoloration and discoloration due to ultraviolet rays and environmental pollution when adding organic pigments for coloring or improvement of aesthetics with simple colors due to pigments.

Therefore, the present invention was created in view of the above circumstances, and when the surface of the concrete was polished, the appearance of gloss, patterns, colors, and marks due to feldspars and inserted marks, etc. The purpose of the present invention is to provide a design concrete pole and a method of manufacturing the same so that there is no problem.

The manufacturing method of the design concrete pole according to the present invention for achieving the above object,
(a) 18-23% by weight cement, 26-40% by weight sand, 31-45% by weight calcite consisting of 5-20 mm inorganic colored natural mineral or waste glass pieces, 0.2% by weight admixture, pigment 0.4-1.7 Wt%, the remaining water is mixed with the composition, the preparation is made by appropriately blending two or more things to express the colored stones such as white and black, green, red color;
(b) injecting the composition into a mold and molding the composition by centrifugal or vibration;
(c) demolding the molded product after steam curing for 8 to 10 hours in an atmosphere of 70 to 80 ° C. to form a stone concrete shell layer;
(d) polishing the surface of the keystone concrete envelope of the demolded molded product so that the pattern and color of the keystone are expressed;
The polishing step,
A stepless concrete layer removal process of roughing 50-60mesh diamond abrasive stones to remove and remove the seedstone concrete layer firstly;
A stone surface exposure step of grinding the surface of the stone layer by grinding with diamond abrasive stones of 100 to 300 mesh in the second step;
A third step is performed by sequentially grinding the surface of the stone which is exposed to the diamond abrasive stone of 400 to 3000mesh diamond to form the surface of the stone;
(e) after placing the mark in which the figure, symbol, character, etc. appear in the mold in the step (b), the composition is added and the mark is exposed on the surface of the molded product after the polishing of the step (d). It is done.

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According to the design concrete pole and the manufacturing method thereof of the present invention, the shell of the concrete pole is contained in the shell, and the outer surface of the polished by the appearance of the pattern and color of the polished keystone, polished concrete poles, communication poles, street lamps When applied to traffic lights, bollards, etc., it can improve the urban aesthetics.

In addition, if the non-stone concrete core layer is further formed inside the pole, manufacturing cost can be reduced.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Design concrete poles according to the present invention is basically included in the composition to obtain a polished pattern and color as shown in FIGS. 8 and 9.

First, the formulation design table of one embodiment for obtaining the composition is as follows.

 color  cement  Ingredient Chemical Admixtures for Concrete   Pigment    water Portland cement White cement Blast furnace slag cement sand   Keystone White  black RED 408 0 102 719 403 632 5.55 33.3 156 Ocher color 408 0 102 719 403 632 5.55 33.3 156 YELLOW 0 408 102 719 403 632 5.55 33.3 156 BLUE 0 408 102 719 403 632 5.55 33.3 156 ORANGE 0 408 102 719 403 632 5.55 33.3 156 GREEN 408 0 102 719 403 632 5.55 33.3 156 PINK 0 408 102 719 632 403 5.55 33.3 156 Ivory 0 408 102 719 1035 (brown glass) 5.55 33.3 156 maroon 408 0 102 719 403 632 5.55 33.3 156 BLACK 408 0 102 719 632 403 5.55 33.3 156 GRAY 0 408 102 719 403 632 5.55 33.3 156 WHITE 0 408 102 719 1035 (light green) 5.55 33.3 156

Remarks 1. The mass unit in Table 1 is kg / m ³ .

     2. The type of keystone is white stone, black, and other brown glass pieces. The maximum size of aggregate is 20mm and the minimum size is 4mm.

      3. Depending on compounding classification (color classification), feldspar can be manufactured by replacing with glass fragments.

      4. The compressive strength of ordinary portland cement and blast furnace slag cement is the same, and the compressive strength of white portland cement is higher than that of ordinary portland cement and blast furnace slag cement.

Below is a look at the ingredients of each formulation.

(1) cement

In general Portland cement, when the color of the pigment is dark green, the color of the product is no problem even if a certain amount of the mixture is added. White cement is used to express the light pastel color, and strength is higher than that of general Portland cement. Blast furnace slag cement has the effect of preserving strength such as suppressing the hydration reaction when it is used by replacing the blast furnace slag cement, and blast furnace slag is a recycled material that can contribute to resource and energy saving and natural resource conservation. At this time, a mixed material (fine mineral wheel) may be added for high strength expression.

(2) sand

Sand is the same color sand is used when producing the product line (Lot) in order to give an even color, and the particle diameter (粒 俓) should be up to # 4 ~ 5mm.

(3) keystone

Inorganic natural minerals with colour, which have good color and a certain intensity when polished, can be used to maintain their own strength (above KS standard) that does not affect the standard strength. In order to show a design or pattern after grinding, you may mix and match various specifications according to color and size of the stone. Several trials of the product showed that it was effective to use small size (5-10mm) stones for small products and relatively large size (8-20mm) stones for large products. If fine powder is included, the change of color is foreseen, so below # 10mesh should be removed. In addition, when iron is mixed in the keystone, it is preferable to remove iron with a magnet in order to exclude the possibility of discoloration due to moisture. For products that do not require ultra-high strength, the product is beautiful even when mixed with waste glass to save the environment and energy.When the minerals used as crushing stones are broken, sharp parts are put in a rotating body in an enclosed space so that the stones are worn out. It can also be used.

(4) pigment

Pigments can be used to create the desired color by mixing the basic colors (red, blue, yellow, black and white) properly. Pigments include organic pigments and inorganic pigments, and organic pigments have good color tones and good coloring power, but are not durable to heat and light (ultraviolet rays), and are easily discolored. Inorganic pigments are generally chemically stable against heat, light, alkali, etc., because the coloring component is made of an inorganic substance, so that the inorganic pigment is used as a coloring agent in the present invention. When pigment is used in concrete, the amount of pigment is used in the amount of 2 ~ 8% by weight based on the amount and type of cement.

<Example>

The fabrication method of one embodiment of a design concrete pole using the composition material above is described.

18 to 23% by weight of cement, 26 to 40% by weight of sand, 31 to 45% by weight of calcite, 0.2% by weight of admixture, 0.4 to 1.7% by weight of pigment, and prepare the composition of the remaining water. (S10 )

                                                          Unit: Kg (%) Classification Material Name cement Fine aggregate Keystone Admixture Pigment water Reference value 510 (20.74) 719 (29.24) 1035 (42.09) 5.55 (0.23) 33.3 (1.32) 165 (6.71) Minimum value 500 (18.74) 658 (26.64) 1096 (44.41) 5.38 (0.23) 10.2 (0.41) 162 (4.71) Maximum value 520 (22.74) 973 (39.42) 781 (31.65) 5.72 (0.23) 40.8 (1.66) 168 (8.71) Reason 1.Water Cement Ratio (W / C): Standard; 3.34%, Min: 29.5%, Max: 35.3% 2. Fine Aggregate Rate (S / A): Standard: 41.0%, Min: 37.5%, Max; 55.5% 3. The pigment was applied with a standard cement mass ratio of 6.5% and from 2% up to 8% (light color system) according to the color expression (dark color system).

The keystone may be an inorganic natural mineral or waste glass pieces of 5 to 20 mm in size.

At this time, add cement, natural colored stone and sand, and first dry the beam, and then measure the added pigment to make the secondary stone beam evenly disperse and mix the stone and pigment in the mixture. Add to the bibeam mixture and mix thoroughly to produce the desired color.

The admixture is a chemical admixture for concrete, and the type of admixture used in the present example was a high strength fluidizing agent. High-strength fluidizing agent is a fluidizing agent suitable for high-strength concrete secondary products of 40MPa or more in secondary concrete products. Reduction ratio of more than 18% and compressive strength ratio are over 120% in 28 days, and the standard usage is 1.0% of cement content. It was.

Next, the composition having the desired color is expressed in a mold (or steel bars in which the reinforcing bars are disposed) as shown in FIG. 4 (S12), and then placed on a rotary centrifuge as shown in FIG. 5 to undergo a molding process (S14). Molding can be done by centrifugal rotation or vacuum.

In order to obtain the dense structure and strength from which the air is removed in the centrifugal molding process, the reference rotation speed (divided into low speed, low speed, low speed, and high speed) and time can be set as shown in Table 2 below.

      division      Within        Low to medium speed       high speed Centrifugal Molding Time (min)      2 to 3      1 to 2       4 to 8 Centrifugal Rotation Speed (rpm / min)     500 to 900    800-1100     1000-1500

In this step, after placing the emblem in which the figures, symbols, characters, etc. appear in the mold, the composition may be added, and then the centrifugal process may be performed. This is to expose the emblem as shown in Figure 9 after the polishing process to be described later on the surface of the molded product. The emblem may be made of metal, resin, rubber, or the like.

Here, a method of vibration molding may be used instead of centrifugal molding.

Then, the finished product is centrifugally cured (S16) under appropriate conditions in the steam curing room without demoulding from the mold as shown in FIG. Steam curing conditions are carried out for about 8 to 10 hours in an atmosphere of 70 ~ 80 ℃. At this time, in order to avoid curing at a sudden high temperature, there should be no temperature change of more than 20 ℃ per hour. When curing is below 70 ℃, there is a risk of lowering the required strength by delaying the initial reaction due to lack of aging temperature.In case of above 80 ℃, the hydration reaction occurs intensively on the surface due to sudden concrete abnormal reaction. Defects that do not mature deeply occur.

   Therefore, steam curing reacts slowly from the surface to induce hydration reactions to the entire interior of concrete according to curing temperature and time, and the maximum temperature of steam curing is 70 ± 80 ℃ (75 ± 5 ℃) to realize the required performance. The time was set as 8 hours (mid-mid term) to 10 hours (mid-term term).

The molded product is then demolded after steam curing. The demolded molded product 10 will form the keystone concrete skin layer 12 as shown in Figure 2a. At this time, the keystone does not appear on the surface of the cinder concrete skin layer, only the color of the pigment appears as shown in FIG.

Next, the surface of the keystone concrete skin layer of the demolded molded product is polished (S18). Polishing is step-wise polishing with a diamond wheel as shown in Figure 6 so that the pattern of the stone is expressed. Grinding uses 50 ~ 60mesh diamond abrasives for roughing, 100 ~ 300mesh diamond abrasives for medium cutting and 400 ~ 3000mesh diamond abrasives for final grinding.
Here, the roughing process using the diamond abrasive stone of 50 ~ 60mesh primarily is a process of removing the non-stone concrete layer. A non-seamstone concrete layer is a part of the concrete shell that does not contain the keystone, and the keystone is not expressed to the outside.
In addition, the process of grinding with diamond abrasive stone of 100 ~ 300mesh in the second step is to expose the surface of the stone stone of the stone layer, and the surface of the stone stone is externally expressed by polishing the surface of the stone stone. Use finer abrasive grains than the roughing process to prevent dropping.
In addition, the process of grinding the diamond abrasive stone of 400 ~ 3000mesh in the third step is to form the gloss of the exposed stone surface by using finer abrasive grain than the medium grinding.

On the other hand, the present invention, after the first step of the composition by the amount of the amount of the pattern to the pattern after the general high-strength concrete mixture to the second step through the centrifugal molding step of the final product design concrete pole 10 as shown in Figure 2b The non-seamstone concrete core layer 14 may be formed in the inside of the stonseok concrete shell layer 12.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

The following drawings, which are attached in this specification, illustrate preferred embodiments of the present invention, and together with the detailed description of the present invention, serve to further understand the technical spirit of the present invention. It should not be construed as limited to.

1 is a manufacturing process of the design concrete pole according to the present invention.

Figure 2a is a partial cross-sectional view of the design concrete pole in accordance with an embodiment of the present invention.

Figure 2b is a partial cross-sectional view of a design concrete pole in accordance with another embodiment of the present invention.

3 to 9 are photographs taken during each manufacturing step of the design concrete pole according to the present invention.

<Explanation of symbols for the main parts of the drawings>

12: keystone concrete envelope

14: non-stone concrete core layer

Claims (7)

(a) 18-23% by weight cement, 26-40% by weight sand, 31-45% by weight calcite consisting of 5-20 mm inorganic colored natural mineral or waste glass pieces, 0.2% by weight admixture, pigment 0.4-1.7 Wt%, the remaining water is mixed with the composition, the preparation is made of a combination of two or more to express the colored stones such as white and black, green, red color; (b) injecting the composition into a mold and molding the composition by centrifugal or vibration; (c) demolding the molded product after steam curing for 8 to 10 hours in an atmosphere of 70 to 80 ° C. to form a stone concrete shell layer; (d) polishing the surface of the keystone concrete skin layer of the demolded molded product so that the pattern and color of the keystone are expressed; The polishing step, A stepless concrete layer removal process of roughing 50-60mesh diamond abrasive stones to remove and remove the seedstone concrete layer firstly; A stone surface exposure step of grinding the surface of the stone layer by grinding with diamond abrasive stones of 100 to 300 mesh in the second step; A third step is performed by sequentially grinding the surface of the stone which is exposed to the diamond abrasive stone of 400 to 3000mesh diamond to form the surface of the stone; (e) after placing the mark in which the figure, symbol, character, etc. appear in the mold in the step (b), the composition is added and the mark is exposed on the surface of the molded product after the polishing of the step (d). Method of designing concrete poles. delete delete delete delete Design concrete pole, characterized in that the appearance of the pattern, color and emblem of the ground stone by the manufacturing method of claim 1. delete

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