KR20200071350A - Multi functional tetrapod with color - Google Patents

Abstract

The present invention relates to a multifunctional color tetrapod, in which a wave dissipating part for damping lift protrudes so that a wave dissipating function can be improved and a plurality of protrusions are formed on a leg body so that structural stability of a tetrapod stacking body can be improved when the tetrapod is stacked. In the multifunctional color tetrapod, a component capable of improving resistance to waves and salt water is added when the tetrapod is manufactured so that color deformation of the tetrapod is slight even when the tetrapod is exposed to seawater for a long time. Therefore, visible and aesthetic properties can be maintained for a long time.

Description

Multi functional tetrapod with color}

The present invention relates to tetrapods, and more specifically, by improving the resistance of the color tetrapods to blue and brine, color tetrapods that have little color deformation even when exposed to sea water for a long time, so that visibility and aesthetics can be maintained for a long time. It is intended to provide.

Further, the present invention relates to a multifunctional colored tetrapod that is capable of improving the structural stability of the tetrapod laminate upon lamination by improving the sofa function by protruding and forming the sofa portion for lift damping, and forming a plurality of protrusions on the leg body.

In general, Tetrapod (Tetrapod) is a release block of a concrete material used for a blue sofa, is formed to have four cone-shaped legs, is stacked in the form of static or turbulent and is used to construct a marine structure such as a breakwater .

Such tetrapods can reduce the energy of the waves by reducing the wave pressure and the rising of the waves and the reflected waves, and can be stably installed in areas with poor environmental conditions such as steep slopes. In addition, it has the advantage that it has a low center of gravity and excellent stability, so it has a lighter weight than other sofa blocks and does not require special attention in construction.

However, despite such advantages, general tetrapods have a curved outer surface of the leg, which causes lift due to wave power, which frequently results in damage to the leg.

In addition, a considerable amount of lift occurs at the lower portion of the center where each leg of the tetrapod meets, and due to this lift, each tetrapod moves in an indefinite shape, causing a stack of tetrapods to deteriorate the structural stability of the structured marine structure. have.

In addition, in the case of breakwaters constructed using tetrapods, many people use it for tourism or fishing purposes. In the event of a crash, it is often impossible to escape due to the smooth surface of tetrapods, leading to human accidents. do.

On the other hand, the conventional tetrapod is gray due to the concrete material to form a monotonous landscape, and could not provide various visual effects.

In order to improve the aesthetics and color of these structures, it may be possible to consider a method of coating colored paint on the surface of tetrapods, but the colored paint fades by being exposed to sunlight and salt water for a long time, and colored by blue There is a problem in that the adhesion of the paint to the tetrapod is reduced, and the colored paint is detached.

Registered Utility Model Publication No. 0903395 (Registered on June 10, 2009)

In the present invention, to improve the resistance to blue and brine, even if exposed to sea water for a long time, the color deformation is small, and to provide a multifunctional color tetrapod capable of maintaining visibility and aesthetics for a long time.

In addition, it is intended to provide a multi-functional color tetrapod capable of improving the structural stability of the tetrapod laminate upon lamination because the sofa portion for lift reduction is protruded to improve the sofa function, and a plurality of protrusions are formed on the leg body.

One embodiment of the present invention for achieving the object as described above is composed of four cylindrical legs 100 are arranged radially from the center, for lifting the damping on the outer circumferential surface of the cylindrical legs 100 The sofa portion 200 relates to a tetrapod formed to protrude, and the tetrapod includes 66 to 84% by weight of aggregate, 9 to 32% by weight of binder, and 1 to 7% by weight of admixture.

The aggregate may include 36 to 48% by weight of coarse aggregate and 52 to 64% by weight of fine aggregate.

The binder includes 32 to 55% by weight of cement, 10 to 34% by weight of slag, 4 to 9% by weight of desulfurized gypsum, 2 to 7% by weight of anhydrous gypsum, 2 to 12% by weight of polymer resin, and 6 to 15% by weight of pigment can do.

At this time, the cement may include at least one or more selected from the group consisting of Portland cement, crude steel cement, medium heat cement, alumina cement and silica cement.

Further, the polymer resin may be obtained by polymerization of an unsaturated acrylate monomer, a silane-modified acrylic monomer, and an alkoxysilane, and the pigment may be at least one selected from the group consisting of white pigments, colored pigments, and photoluminescent pigments. It may include.

Meanwhile, the admixture may include at least one or more selected from the group consisting of a lignin-based admixture, a naphthalene-based admixture, a melamine-based admixture, and a polycarboxylic acid-based admixture.

The multi-functional color tetrapod according to an embodiment of the present invention has improved resistance to blue and salt water, so that even when exposed to sea water for a long period of time, there is little color deformation, so that visibility and aesthetics can be maintained for a long time.

In addition, the sofa portion for lift damping is protruded to improve the sofa function, and a plurality of protrusions are formed on the leg body to improve the structural stability of the tetrapod laminate during lamination.

1 is a view showing a tetrapod according to an embodiment of the present invention.
2 is a view showing a tetrapod according to another embodiment of the present invention.

Before describing in detail through the preferred embodiments of the present invention, terms or words used in the present specification and claims should not be interpreted as being limited to the ordinary or dictionary meanings, meanings consistent with the technical spirit of the present invention. And should be interpreted as a concept.

First, referring to FIG. 1, the multifunctional color tetrapod according to an embodiment of the present invention is configured by radially disposing four cylindrical legs 100 from the center, and the outer peripheral surface of the cylindrical legs 100 On the sofa portion 200 for lifting the lift is formed protruding.

At this time, a support protrusion 110 is protruded on the inner side of the longitudinal outer circumferential surface of the leg body 100, and a sofa portion 200 for lift reduction is protruded on the outer side of the longitudinal outer circumferential surface of the leg body 100.

The support protrusion 110 is a virtual correlation line VL1 formed in the longitudinal direction of one of the four leg bodies 100 and the other one of the other leg bodies 100 adjacent to the leg body 100. Among the VL2), two correlation lines that meet each other may be formed along the shortest correlation line VL1.

The support protrusion 110 is formed to mutually support the close contact between adjacent tetrapods in the process of stacking a plurality of tetrapods, and the tetrapod is atypical due to the weak lift remaining after being damped by the sofa portion 200 for lift damping. To prevent it from moving. In addition, when a fall accident occurs, the fall accident may be used for the purpose of escaping while holding the support protrusion 110 by hand or stepping on the foot.

The sofa portion 200 for the lift damping is formed to protrude on the outer circumferential surface of the cylindrical leg body 100 and can perform lift lift and sofa functions without damaging the basic shape of the tetrapod.

The lift damping sofa unit 200 includes an end ring-shaped sofa jaw 210 formed at an end edge of the leg body 100 and an inner ring-shaped sofa formed at a predetermined distance from the end ring-shaped sofa jaw 210 toward the center. Jaw 210' and a straight sofa jaw 220 extending from the end ring-shaped sofa jaw 210 inward along the longitudinal direction of the leg body 100 to be connected to the inner ring-shaped sofa jaw 210' It is formed as...

The straight sofa jaw 210 may be formed along the correlation line VL1 having the shortest length of two correlation lines that meet each other among the virtual correlation lines VL1 and VL2 described above.

2 is a view showing a tetrapod according to another embodiment of the present invention, in another embodiment of the present invention, the reinforcement jaw 230 and the multifunctional connection hole 211 in the tetrapod according to the embodiment shown in FIG. It is further formed.

The reinforcing jaw 230 is formed at the edge portion to which the end ring-shaped sofa jaw 210, the inner ring-shaped sofa jaw 210' and the straight sofa jaw 220 are connected, thereby improving the strength of the connecting portions connecting the respective sofa jaws. It can be formed to let.

The multi-function connection hole 211 may be formed to be penetrated in the longitudinal direction of the leg body 100 in the end ring-shaped sofa jaw 210 and the inner ring-shaped sofa jaw 210'.

Therefore, by connecting the multi-function connection hole 211 formed in two tetrapods spaced apart with a rope, and installing a net on the rope, it can be used for safety ropes, seaweed farms, or the like, or in the multi-function connection hole 211 It can also be used for promenades, fishing grounds, etc. by connecting props and installing decks on top of the props.

On the other hand, the tetrapod, 66 to 84% by weight of aggregate, 9 to 32% by weight of binder and 1 to 7% by weight of admixture are formed, thereby expressing excellent strength and durability, and even after prolonged exposure to sunlight and salt water. This can be maintained.

In addition, the problem of pigment loss due to blue or color change caused by brine is minimized, and thus the color, visibility, and aesthetics of tetrapods can be maintained even when exposed to blue and brine for a long time.

The aggregate is added to express the strength and durability of tetrapods, and includes 36 to 48% by weight of coarse aggregate having a particle size of 5 to 25 mm and 52 to 64% by weight of fine aggregate having a particle size of less than 5 mm.

When the amount of coarse aggregate is too small or the amount of fine aggregate is too large, it is vulnerable to plastic deformation due to external pressure, and if the amount of coarse aggregate is too large or the amount of fine aggregate is too small, the strength of tetrapods decreases, so the coarse aggregate and fine aggregate are reminded. It is preferred to include within the weight range.

At this time, the coarse aggregate may include blast furnace cold slag, crushed stone, gravel, or a mixture thereof, preferably blast furnace cold slag and crushed stone or blast furnace cold slag and gravel.

The blast furnace cold slag is obtained by sintering the crystallized by slow cooling the molten blast furnace slag, SiO2 31~36 wt%, CaO 40~45 wt%, Al2O3 12~17 wt%, MgO 4~8 wt% and other iron compounds , Sulfur, manganese oxide and titanium dioxide.

The blast furnace cold slag generally exhibits tensile strength and freeze-thaw resistance similar to crushed stone and gravel used as coarse aggregate, and has higher compressive strength and flexural strength. In addition, it has the advantage of being environmentally friendly because it is recycled by-product of steelmaking.

At this time, it is preferable to use the blast furnace cold slag, because when using an unwashed aggregate, compressive strength and adhesive strength may be reduced by fine powder attached to the aggregate surface.

Meanwhile, the binding material is added to combine the aggregate and the aggregate, and may be included in 9 to 32% by weight. If the binder is contained in less than 9% by weight, it is because the adhesion between the aggregates is weak and can be easily destroyed, and when it exceeds 32% by weight, it is vulnerable to plastic deformation by external pressure.

The binder may include at least one or more cements and slags selected from the group consisting of Portland cement, crude steel cement, medium heat cement, alumina cement, and silica cement, desulfurized gypsum, anhydrous gypsum, polymer resin, and pigment, and more preferably May further include 2-sulfobenzoic acid cyclic anhydride.

Specifically, the binder material is 32 to 55% by weight of cement, 10 to 34% by weight of slag, 4 to 9% by weight of desulfurized gypsum, 2 to 7% by weight of anhydrous gypsum, 2 to 12% by weight of polymer resin and 6 to 15% by weight of pigment It may be included, and when 2-sulfobenzoic acid cyclic anhydride is included, it is preferable to be included in 0.5 to 4% by weight in the binder.

The cement may include at least one or more selected from the group consisting of Portland cement, crude steel cement, medium heat cement, alumina cement and silica cement.

In addition, when the content of cement is less than 32% by weight, it is difficult to obtain a sufficient adhesion and strength improvement effect, and when it exceeds 55% by weight, the adhesion of the pigment to be described later may be lowered, and cracks due to hydration heat may occur. Therefore, it is preferable to be added within the above-mentioned range.

The slag may be included in 10 to 34% by weight, and when it is included in less than 10% by weight, cracks due to an increase in heat of hydration may occur because the content of cement must be relatively increased. Since there is a problem of slowing down the curing and initial strength development, it is preferable to be used within the above-mentioned range.

The desulfurized gypsum and anhydrous gypsum are added to alleviate the initial strength development problem of the slag, improve the final strength, and further improve chemical resistance.

Desulfurized gypsum is added to improve the final strength and chemical resistance, and may be included in 4 to 9% by weight, and when included below the minimum range, it is difficult to obtain such an effect, and when it exceeds the maximum range, the binder There is a problem that the workability is reduced by decreasing the fluidity of.

Anhydrous gypsum is added to solve such an initial strength problem, and may be added in 2 to 7% by weight, and when added in an amount of less than 2% by weight, it is difficult to obtain an effect of improving initial strength, and exceeds 7% by weight When included, the effect of improving the initial strength due to the added content is negligible, and the fluidity of the binder decreases, resulting in reduced workability, and thus it is preferable to be included within the above-described range.

The polymer resin is added to improve the flexural strength of tetrapods to minimize cracking and destruction due to external pressure, and to improve adhesiveness and stability of pigments to be described later, to prevent pigment loss and color change caused by blue and salt water.

The polymer resin may be included in 2 to 12% by weight, and when it is included in less than 2% by weight, it is difficult to obtain the above-described effect, and when it is included in excess of 12% by weight, the strength of tetrapods is excessively reduced, and thus It is preferred to be included within one range.

At this time, by using a polymer resin obtained by polymerization of an unsaturated acrylate monomer, a silane-modified acrylic monomer, and an alkoxysilane, adhesion and chemical resistance of the binder can be further improved.

More specifically, it is preferable to use those obtained by polymerization of 45 to 56% by weight of an unsaturated acrylate monomer, 25 to 37% by weight of a silane-modified acrylic monomer, and 17 to 24% by weight of an alkoxysilane.

The unsaturated acrylate monomer is added to express the strength of the polymer resin, and the preferred content of the unsaturated acrylate monomer to achieve this effect is 45 to 56% by weight.

As the unsaturated acrylate monomer, methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, ethyl methacrylate, 2-ethylhexyl acrylate, or a mixture containing at least two or more of them may be used.

The silane-modified acrylic monomer is added to control the glass transition temperature of the polymer resin and improve resistance to salt water, and may be included in 25 to 37% by weight, and the silane-modified acrylic monomer is 3-trimethoxysilylpropyl meta Acrylate or 3-trimethoxypropylacrylate.

The alkoxysilane is added to improve the adhesion of the polymer resin, and may be included in 17 to 24% by weight, for example, tetraethoxysilane, methyltriethoxysilane, and the like, but is not limited thereto.

At this time, the polymer resin obtained by mixing and polymerizing an initiator mixture containing an alginate salt, a surfactant, and an initiator, and a monomer mixture containing an unsaturated acrylate monomer, a silane-modified acrylic monomer, an alkoxysilane, and a surfactant, is polymerized. When used, the adhesion of the polymer resin and the resistance to salt water can be further improved. That is, it is possible to further improve the effect of preventing the desorption of the pigment by blue and the discoloration of the pigment by brine.

The alginate is added to adjust the pH and stabilize the emulsification reaction to improve the adhesion of the polymer resin as a reaction product and resistance to salt water, and may be sodium alginate, potassium alginate, calcium alginate or aluminum alginate.

The surfactant may be a material such as sodium dodecylbenzenesulfonate, sodium lauryl sulfate or octylphenol ethoxylate, but is not limited thereto.

The initiator may be a known initiator such as benzoyl peroxide and azobisisobutyronitrile, but is not limited thereto.

On the other hand, when the polymer resin is used in combination with cement concrete, there is a problem in that the adhesive strength with cement concrete is rapidly reduced by the admixture added to improve the fluidity of cement concrete. In order to improve this, when mixing a rubber-based resin, the compatibility with the polymer resin is low, causing a decrease in transparency, stability and weatherability, and there is a problem in that it is difficult to impart a desired color to tetrapods.

Accordingly, in the present invention, by adding 2-sulfobenzoic acid cyclic anhydride having excellent compatibility with a polymer resin, the network structure of the polymer resin can be formed more densely to uniformly disperse and bond the aggregate, binder, and pigment. In addition, the transparency of the polymer resin is maintained, and it is advantageous to realize a desired color, and it is possible to compensate for a decrease in adhesion due to admixture.

2-Sulfobenzoic acid cyclic anhydride may be included in 0.5 to 4% by weight, and when it is contained in less than 0.5% by weight, it is difficult to obtain such an effect, and when it is included in excess of 4% by weight, the strength of tetrapod is lowered. , It is preferably included within the above-mentioned range.

On the other hand, the pigment is added to improve visibility and aesthetics by imparting color to tetrapods, and may include at least one selected from the group consisting of white pigments, colored pigments, and photoluminescent pigments, but implements a desired color. In order to improve visibility at night, it is more preferable to include all of a white pigment, a colored pigment, and a phosphorescent pigment.

The pigment may be included in 6 to 15% by weight, because if the content of the pigment is less than 6% by weight, the color expression rate is low, and when it exceeds 15% by weight, the problem of strength decrease of tetrapod due to the pigment may occur.

The white pigment is added to improve the hiding power and the color expression rate due to the colored pigment, and is composed of titanium dioxide, zinc emulsion, zinc oxide, zinc sulfide, zinc sulfate, light white, barium sulfate, calcium carbonate, alumina oxide, and lithopone Any one or more selected from can be used.

The colored pigment may be at least one selected from the group consisting of carbon black, titanium black, iron oxide, chromium oxide, phthalocyanine, ultramarine blue, cadmium red, and chrome yellow, but is not necessarily limited thereto, and other colors other than white Any color pigment that can express can be used.

Phosphorescent pigment is a pigment that absorbs and accumulates light emitted from a light source and slowly emits light in a dark place. Since tetrapod containing phosphorescent pigment emits light at night, it is possible to recognize the location of the tetrapod even in the dark even when it is dark. Safety accidents can be prevented.

As the phosphorescent pigment, for example, SrAl2O4:Eu may be used, but is not limited thereto, and may be used without particular limitation as long as it is used in the technical field to which the present invention pertains.

It is preferable to use such pigments coated with fluorinated ethylene propylene (FEP), silicone-based copolymers, or mixtures thereof. This is because the pigment coated with such a material has improved water resistance and salt resistance, and does not easily discolor or wear even when exposed to salt water for a long time. In addition, in the case of the photoluminescent pigment, it is because the afterglow retention time by the photoluminescent pigment can be further extended.

On the other hand, when preparing the binder, it is preferable to first mix the polymer resin, 2-sulfobenzoic acid cyclic anhydride and pigment, and then mix with the rest of the other materials, separately mixing the polymer resin, 2-sulfobenzoic acid cyclic anhydride and pigment This is because some pigments are not directly adhered to the polymer resin, and thus can be easily detached by an external physical impact such as blue, and the effect of improving the salt resistance of the pigment by the polymer resin can also be reduced.

On the other hand, the admixture is added to improve durability, such as copper fusion resistance and corrosion resistance of tetrapods, and improve workability by improving the fluidity of the composition forming tetrapods.

The admixture can be added in 1 to 7% by weight, it is difficult to obtain such an effect when included in less than 1% by weight, and when it exceeds 7% by weight, the strength of the tetrapod and the adhesion of each material constituting the tetrapod decreases. It is preferably added within the above-mentioned range.

The admixture may include at least one selected from the group consisting of lignin-based admixtures, naphthalene-based admixtures, melamine-based admixtures and polycarboxylic acid-based admixtures.

Hereinafter, an embodiment of the present invention will be described. However, the scope of the present invention is not limited to the following preferred embodiments, and those skilled in the art may implement various modified forms of the contents described herein within the scope of the present invention.

[Production Example 1]

Polymer resin production

83 g of water, 11 g of sodium alginate, 2 g of sodium lauryl sulfate as a surfactant, and 100 g of an initiator mixture in which 4 g of benzoyl peroxide as an initiator, 52 g of 2-ethylhexyl acrylate as an unsaturated acrylate monomer, and 3-tree as a silane-modified acrylic monomer 28 g of methoxysilylpropyl methacrylate, 20 g of alkoxy silane tetraethoxysilane, 3 g of sodium lauryl sulfate as a surfactant, and 150 g of a monomer mixture of 47 g of water were polymerized at 80° C. for 5 hours and then cooled at room temperature. A polymer resin was prepared.

Binder Produce

7% by weight of polymer resin, 2% by weight of 2-sulfobenzoic acid cyclic anhydride and 10% by weight of pigment mixed with white pigment, colored pigment and phosphorescent pigment at 1:2:2, 40% by weight Portland cement, slag A binder was prepared by mixing with 31% by weight, 6% by weight of desulfurized gypsum, and 4% by weight of anhydrous gypsum.

At this time, the surface of the pigment was coated with fluorinated ethylene propylene, titanium dioxide was used as a white pigment, red iron oxide was used as a colored pigment, and SrAl ₂ O ₄ :Eu was used as a phosphorescent pigment.

color Tetrapod mortar Disclosure Produce

45% by weight of coarse aggregate with a particle size of 5 to 25mm, 77% by weight of aggregate with 55% by weight of fine aggregate with a particle size of less than 5mm, 21% by weight of binder, and 2% by weight of naphthalene-based admixture, injected into a mold, and 50 times on both sides After compacting and curing for 24 hours, a mortar specimen for color tetrapod was prepared.

[Experimental Example 1]

As a binder for the mortar for tetrapods, a binder mixed according to the mixing ratio in Table 1 was used, and after preparing each mortar specimen in the same manner as in Production Example 1, physical properties were measured according to the following experimental method and the results are shown in Table 2 It was described in.

Unit:% by weight Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Portland cement 41.5 40 38.5 42 37.5 Slag 31 31 31 31 31 Desulfurized gypsum 6 6 6 6 6 Gypsum 4 4 4 4 4 Polymer resin 7 7 7 7 7 2-Sulfobenzoic acid cyclic anhydride 0.5 2 3.5 0 4.5 Pigment 10 10 10 10 10

Property measurement

According to KS F 4042, the compressive strength, flexural strength, and chloride penetration resistance of each specimen (age 28 days) were measured. Compressive strength is more than 40MPa, bending strength is more than 7MPa, chloride penetration resistance is judged to be good when it is 1000 Coulombs or less, and it is judged to be bad when it exceeds the above standard.

Saturation measurement

The saturation of each specimen was measured using a Minolta CR-300 colorimeter.

Test Items Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Compressive strength (MPa) 42 44 41 31 37 Flexural strength (MPa) 8 9 11 4 12 Chloride penetration resistance (Coulombs) 352 337 324 513 321 saturation 65.2 64.8 66.1 62.8 66.1

Looking at the experimental results in Table 2, all of Examples 1 to 3 were found to satisfy the criterion or higher in compressive strength, flexural strength, and chloride penetration resistance.

In the case of Comparative Example 1, it was confirmed that the compressive strength and the flexural strength were less than the usage criteria, and this is because it does not contain 2-sulfobenzoic acid cyclic anhydride, and this is because the adhesive strength of the polymer resin was decreased by the admixture. In addition, for the same reason, chloride penetration resistance was higher than that of other specimens.

In the case of Comparative Example 2, the flexural strength satisfies the use criterion, but the compressive strength was found to be less than the use criterion. .

[Experimental Example 2]

A polymer resin was prepared as in the method for preparing a polymer resin in Preparation Example 1, but the material used as a monomer was changed as shown in Table 3, or a polymer resin specimen was prepared by changing the use of alginate in the polymerization step. At this time, each specimen was prepared by mixing 98% by weight of the polymer resin and 2% by weight of the pigment used in preparing the binder of Preparation Example 1.

After measuring the saturation change pattern using the polymer resin specimen thus prepared, the results are shown in Table 4.

Unit: g Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Unsaturated acrylate
Monomer 52 100 0 78 0 52 Silane modified acrylic
Monomer 28 0 100 0 77 28 Alkoxy silane 20 0 0 22 23 20 Use of alginate O O O O O X

Saturation change measurement

The redness (a*:redness) and yellowness (b*:yellowness) of each specimen before and after brine exposure were measured, and the saturation was calculated according to Equation 1 below, and the results are shown in Table 2.

Saturation = (a* ² +b* ² ) ^{0 . 5} (Equation 1)

Brine exposure was performed by placing each specimen in brine so that the specimen was completely immersed in brine having a salinity of 3.5% collected from Gangneung, Donghae, and then standing for 30 days at room temperature in the sun.

Test Items Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Saturation (before salt water exposure) 64.8 66.1 64.8 62.4 65.3 65.5 Saturation (after salt water exposure) 60.1 34.8 41.6 37.5 44.1 31.2

Looking at the experimental results in Table 4, in Example 2, it was found that the saturation before and after salt water exposure was similar, so that the original vivid color was maintained even when exposed to salt water and UV light for a long time.

On the other hand, Comparative Examples 3 to 7 were confirmed to have a large change in saturation before and after salt water exposure, which is confirmed by the results shown because the pigment was decolored by brine and ultraviolet light.

These results are judged to be due to the change in the resistance to chloride penetration of the polymer resin depending on the type of monomer used to manufacture the polymer resin and the presence or absence of use of the alginate added during emulsion polymerization of the polymer resin.

Accordingly, the unsaturated acrylate monomer, silane-modified acrylic monomer and alkoxysilane in the binder are used to maintain the original vivid color even when exposed to salt water and ultraviolet light for a long time, as the tetrapod has a high strength that is not easily destroyed by other external forces including blue. It is preferable to use a polymer resin obtained by polymerizing under alginate, and to use 2-sulfobenzoic acid cyclic anhydride together with the polymer resin.

The present invention is not limited to the specific embodiments and descriptions described above, and various modifications can be carried out by anyone having ordinary knowledge in the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. And such modifications are within the protection scope of the present invention.

100: leg body 110: support projection
200: sofa portion 210: end ring-shaped sofa chin
210': inner ring sofa 211: connecting hole
220: straight sofa jaw 230: reinforced jaw

Claims (7)

In the tetrapod formed radially from the center of the four cylindrical leg body 100 is arranged, the sofa portion 200 for lifting the lift on the outer circumferential surface of the cylindrical leg body 100,
The tetrapod, 66 to 84% by weight of aggregate, characterized in that it comprises 9 to 32% by weight of binder and 1 to 7% by weight of admixture, multifunctional color tetrapod. According to claim 1,
The aggregate is characterized in that it comprises 36 to 48% by weight of coarse aggregate and 52 to 64% by weight of fine aggregate, multifunctional color tetrapod. According to claim 1,
The binder includes 32 to 55% by weight of cement, 10 to 34% by weight of slag, 4 to 9% by weight of desulfurized gypsum, 2 to 7% by weight of anhydrous gypsum, 2 to 12% by weight of polymer resin, and 6 to 15% by weight of pigment Multifunctional color tetrapod, characterized by doing. According to claim 3,
The cement, Portland cement, crude steel cement, medium heat cement, alumina cement and at least one selected from the group consisting of silica cement, multifunctional color tetrapod. According to claim 3,
The polymer resin is obtained by polymerization of an unsaturated acrylate monomer, a silane-modified acrylic monomer, and an alkoxysilane, a multifunctional color tetrapod. According to claim 3,
The pigment comprises at least one selected from the group consisting of white pigments, colored pigments and photoluminescent pigments, multifunctional color tetrapods. According to claim 1,
The admixture comprises at least one selected from the group consisting of lignin-based admixtures, naphthalene-based admixtures, melamine-based admixtures and poly carboxylic acid-based admixtures, multifunctional color tetrapods.

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