KR102317188B1 - Gap permeable block having guide groove of rainwater - Google Patents

Abstract

The present invention relates to a gap permeable block, and more particularly, to a gap permeable block repeatedly installed horizontally and longitudinally on a sidewalk or driveway to form a pavement. The gap permeable block according to an embodiment of the present invention has: a hexahedral block main body including a base layer and a surface layer formed on the upper surface of the base layer; a guide groove formed on the upper surface of the block main body to extend long toward the side of the block main body and guiding flow of water; and a permeation groove extending along the width on the side surface of the block main body to be connected to the guide groove and allowing the water flowing along the guide groove to permeate the ground. The gap permeable block of the present invention is not easily damaged and can maintain permeability even in long-time use.

Description

Gap pitcher block with rainwater guide groove {GAP PERMEABLE BLOCK HAVING GUIDE GROOVE OF RAINWATER}

The present invention relates to a crevice permeable block, and more particularly, to a crevice permeable block which is repeatedly installed horizontally and vertically on a sidewalk or driveway to form a pavement surface.

As the area of pavements made of impervious materials increases due to urbanization, the natural permeable area continues to decrease. Accordingly, there is a problem of deterioration of water quality due to insufficient inflow of groundwater in rivers and groundwater, and flooding due to insufficient permeability in urban areas.

Since natural water circulation is required to solve this problem, a permeable block that induces the movement of water from the pavement to the ground has been proposed as an alternative to establishing a natural water circulation on the pavement.

Korean Patent Registration No. 10-1221273 proposes a permeable block in which a lattice groove is formed so that an anti-slip protrusion is formed on the upper surface, and a permeable hole is formed through the lattice groove.

However, in the conventional permeable block, since the permeable hole is formed in the center, there is a problem in that cracks occur due to the freezing of water flowing into the permeable hole in winter, and the permeable hole is blocked by various contaminants such as soil and sand There is a problem that it is closed. .

Therefore, there has been a demand for a permeable block that has less risk of breakage and does not deteriorate water permeability even after long-term use.

Korean Patent Registration No. 10-1221273

The technical problem to be achieved by the present invention is to provide a water-permeable block that is less prone to damage and does not reduce water permeability even after long-term use.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. There will be.

In order to achieve the above technical object, an embodiment of the present invention includes a base layer and a surface layer formed on the upper surface of the base layer in an interstitial permeable block in which a plurality are repeatedly installed in the horizontal or vertical direction to form a surface surface on the ground A block body in the form of a hexahedron that extends along the width direction to be connected to the guide groove on the side of the block body and a guide groove that is formed to extend long toward the side of the block body and induce the movement of water on the upper surface of the block body Provided is a niche permeable block including a permeable groove for permeating water that has moved along the groove to the ground.

In one embodiment of the present invention, the base layer includes cement, fine aggregate, and coarse aggregate, and the surface layer includes cement, white aggregate, black aggregate, fine alumina powder, photocatalyst powder, zeolite, diatomaceous earth and Oxi-PAN (Oxidized PolyAcryloNitrile) fiber and Polyphenylene sulfide (Polyphenylene Sulfide) fiber may include a mixed fiber mixed.

In one embodiment of the present invention, a plurality of guide grooves may be provided to cross each other.

In one embodiment of the present invention, the guide groove may be arranged in a straight line with the guide groove of another interstitial pitcher block disposed adjacently.

In one embodiment of the present invention, the protrusion formed on the upper surface of the block body by the guide groove may be formed to extend long toward the guide groove for guiding the movement of water to the guide groove on the upper surface of the protrusion.

According to an embodiment of the present invention, in the present invention, a gap is formed between a pair of mutually adjacent permeable blocks by a permeable groove, and rainwater permeates into the ground through this gap, so there is little risk of damage even after a long period of use Permeability does not decrease.

In addition, according to the present invention, rainwater existing on the upper surface is guided to move toward the permeable groove by the guide groove, so that it can be rapidly permeated into the ground.

In addition, in the present invention, the surface layer contains photocatalyst powder, zeolite, diatomaceous earth, and mixed fibers to have excellent photocatalytic properties and heat shielding properties.

It should be understood that the effects of the present invention are not limited to the above-described effects, and include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a plan view of a gap-permeable block according to an embodiment of the present invention.
Figure 2 is a front view of a gap-permeable block according to an embodiment of the present invention.
Figure 3 is a plan view of the gap permeable block formed with a guide groove according to an embodiment of the present invention.
4 is a cross-sectional view taken along line A-A' of FIG. 3 .
5 is an exemplary view of the first use of a gap pitcher block according to an embodiment of the present invention.
Figure 6 is a second example of use of the gap pitcher block according to an embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be embodied in several different forms, and thus is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is said to be “connected (connected, contacted, coupled)” with another part, it is not only “directly connected” but also “indirectly connected” with another member interposed therebetween. Including cases where In addition, when a part "includes" a certain component, this means that other components may be further provided, rather than excluding other components, unless otherwise stated.

The terms used herein are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In this specification, terms such as "comprises" or "have" are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

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

1 is a plan view of a gap-permeable block 1 according to an embodiment of the present invention.

A plurality of gap-permeable blocks 1 are repeatedly installed in the horizontal or vertical direction to form a pavement surface on the ground, and the block body 10 constituting the body of the gap-permeable block 1, the upper surface of the block body 10 It may include a guide groove 20 for inducing the movement of water and a permeable groove 30 formed on the side of the block body 10 to permeate the water moving along the guide groove 20 into the ground.

Hereinafter, each configuration of the gap-permeable block 1 will be described in more detail with reference to FIG. 2 .

The block body 10 may be formed in a hexahedral shape, and may include a base layer 11 and a surface layer 12 laminated on the upper surface of the base layer 11 . In this case, the horizontal length L1 and the vertical length L2 of the block body 10 may be 180 to 220 mm, and the horizontal length L1 and the vertical length L2 may be the same.

The guide groove 20 is recessed downward from the upper surface of the block body 10 (ie, the upper surface of the surface layer 12 ), and may be formed to extend in a straight line toward the side of the block body 10 . At this time, the guide groove 20 may be formed extending toward the opposite side surfaces of the block body 10, the cross-section may have a U-shaped, V-shaped, ┗┛-shaped or inverted trapezoidal shape.

According to an embodiment of the present invention, the guide groove 20 may include a first guide groove 21 elongated in the horizontal direction and a second guide groove 22 formed elongated in the vertical direction, and the first The guide groove 21 and the second guide groove 22 may be disposed to cross each other. In this case, a plurality of first guide grooves 21 may be provided and may be disposed parallel to each other, and a plurality of second guide grooves 22 may also be provided and may be disposed parallel to each other.

A plurality of protrusions 40 protruding upward may be formed on the upper surface of the block body 10 by the guide groove 20 .

On the other hand, in the drawings of the present invention, two first guide grooves 21 and second guide grooves 22 that are arranged symmetrically with respect to the center of the block body 10 are shown, but the first guide grooves 21 are shown. And the number and shape of the second guide groove 22 is not limited thereto.

The permeable groove 30 is formed to be recessed inward from the side of the block body 10 , and is formed to extend in a straight line along the width direction of the block body 10 to be connected to the guide groove 20 . At this time, the permeable groove 30 may be formed at each end of the guide groove 20 in contact with the side surface of the block body 10 .

The gap-permeable block 1 may have a gap formed between the adjacent blocks by the water-permeable groove 30, and since rainwater permeates into the ground through this gap, there is little risk of damage even after long-term use and water permeability may not be degraded.

In addition, the crevice permeable block 1 is guided so that rainwater existing on the upper surface moves toward the permeable groove 30 by the guide groove 20 so that it can be rapidly permeated into the ground.

2 is a front view of a gap-permeable block 1 according to an embodiment of the present invention.

According to an embodiment of the present invention, the height H1 of the base layer 11 may be 50 to 74 mm, and the height H2 of the surface layer 12 may be 6 to 10 mm. In more detail, the crevice permeable block 1 produced for sidewalks may have a height (H1) of 50 to 54 mm of the base layer 11, and the crevice permeable block 1 produced for the driveway is the base layer 11 of The height H1 may be 70 to 74 mm.

The depth D1 of the guide groove 20 may be 1.3 to 1.7 mm, and the width W1 of the guide groove 20 (see FIG. 1 ) may be 25 to 35 mm. In this case, the guide groove 20 may be formed to have a depth D1 gradually increasing from the center of the block body 10 to the permeable groove 30 .

The depth (D2, see FIG. 1) of the permeable groove 30 may be 0.2 to 0.4 mm, and the width (W2, see FIG. 1) of the water permeable groove 30 may be 25 to 45 mm. At this time, the width W2 of the permeable groove 30 may be gradually narrowed toward the inner side, so that the cross-section thereof may form a trapezoidal shape.

The depth and width of the guide groove 20 and the permeable groove 30 described above are derived in consideration of both pedestrian safety and rainwater permeability.

According to an embodiment of the present invention, the base layer 11 may be prepared by compacting the composition for forming the base layer formed by mixing cement, coarse aggregate, fine aggregate, and water into a mold and then compacting it.

Specifically, the composition for forming the base layer may include 250 to 500 parts by weight of fine aggregate, 100 to 250 parts by weight of coarse aggregate, and 15 to 30 parts by weight of water based on 100 parts by weight of cement. Here, the fine aggregate means an aggregate having a particle diameter of 5 mm or less, and the coarse aggregate means an aggregate having a particle diameter exceeding 5 mm.

Hereinafter, each configuration of the composition for forming the base layer will be described in more detail.

Cement promotes the bonding reaction between materials in the composition for forming the base layer and acts as an adhesive, contributing to the formation of the initial strength of the base layer 11 and enhancing the strength of the base layer 11 over a long period of time. can do. In this case, the cement may be one or a combination of two or more selected from the group consisting of portland cement, crude steel cement, white cement, and blast furnace cement, but is not limited thereto.

Fine aggregate and coarse aggregate serve to improve the strength of the base layer 11, and may be one or a combination of two or more selected from the group consisting of sand, crushed sand, stone powder, and blast furnace fine powder, but is not limited thereto.

Here, it is preferable that the fine aggregate has a particle size of 1.2 to 5 mm, and the coarse aggregate has a particle size of 8 to 10 mm. Accordingly, the base layer 11 can form internal voids and significantly increase the compactness to form a strength that is not easily broken.

Water may serve to increase the ease of mixing of the composition for forming the base layer. When the content of water is less than 15 parts by weight based on 100 parts by weight of cement, it may be difficult to express strength because the amount of water to promote the hydration reaction of cement is small. When the content of water exceeds 30 parts by weight based on 100 parts by weight of cement, side fullness may occur due to an excessive amount of water.

On the other hand, the surface layer 12 is manufactured by laminating a composition for forming a surface layer formed by mixing cement, snow white aggregate, black aggregate, alumina fine powder, photocatalyst powder, zeolite, diatomaceous earth, water and mixed fibers on the base layer 11, and then compressing and compacting it. can be

Specifically, the composition for surface layer formation is based on 100 parts by weight of cement, 300 to 500 parts by weight of white aggregate, 50 to 150 parts by weight of black aggregate, 3 to 10 parts by weight of fine alumina powder, 2 to 10 parts by weight of photocatalyst powder, 5 to 30 parts by weight of zeolite. It may include parts by weight, 5 to 30 parts by weight of diatomaceous earth, and 15 to 30 parts by weight of water, and the content of the mixed fibers may be 3.0 to 6.0 vol% based on the entire surface layer 12 . Here, the white aggregate means a colored aggregate including a natural gray or white aggregate, and the black aggregate means a colored aggregate including a natural black aggregate.

Hereinafter, each configuration of the composition for forming a surface layer will be described in more detail.

Cement promotes the bonding reaction between materials in the composition for forming the surface layer and acts as an adhesive, contributing to the formation of the initial strength of the surface layer 12 and enhancing the strength of the surface layer 12 over a long period of time can do. In this case, the cement may be one or a combination of two or more selected from the group consisting of portland cement, crude steel cement, white cement, and blast furnace cement, but is not limited thereto.

The white aggregate and the black aggregate serve to improve the strength of the surface layer 12, and may have a particle size of 0.1 to 3.5 mm, and one or two or more selected from the group consisting of sand, crushed sand, stone powder, and blast furnace fine powder. It may be a combination, but is not limited thereto.

When the content of white aggregate is less than 300 parts by weight based on 100 parts by weight of cement, the weight ratio of relatively expensive cement increases, resulting in an increase in manufacturing cost, and the viscosity of the mortar may increase, resulting in poor workability. When the content of the white aggregate exceeds 500 parts by weight based on 100 parts by weight of cement, the weight ratio of the cement is relatively low and the strength of the surface layer 12 may be reduced.

When the content of black aggregate is less than 50 parts by weight based on 100 parts by weight of cement, the weight ratio of relatively expensive cement increases, resulting in an increase in manufacturing cost, and the viscosity of the mortar increases, which may deteriorate workability. When the content of the black aggregate exceeds 150 parts by weight based on 100 parts by weight of cement, the weight ratio of the cement is relatively low and the strength of the surface layer 12 may be reduced.

The fine alumina powder serves to impart high reflectivity to the surface of the surface layer 12 , and may contribute to the realization of heat shielding properties of the interstitial water permeable block 1 . The fine alumina powder may be one or a combination of two or more selected from the group consisting of aluminum isopropoxide, aluminum hydroxide, aluminum acetate, alumina trihydrate and aluminum chloride, preferably aluminum hydroxide.

When the content of fine alumina powder is less than 3 parts by weight based on 100 parts by weight of cement, the use weight of the highly reflective material is relatively low and the high reflectivity is lowered, so the heat shielding properties of the interstitial water permeable block 1 may be reduced. When the content of the fine alumina powder exceeds 10 parts by weight based on 100 parts by weight of cement, the weight ratio of the cement may be lowered and the strength of the surface layer 12 may be reduced.

The photocatalyst powder serves to promote a photochemical reaction in the composition for forming a surface layer, and can contribute to the implementation of the nitrogen oxide (NOx) removal characteristics of the interstitial water permeable block 1 .

When the content of the photocatalyst powder is less than 2 parts by weight based on 100 parts by weight of cement, the nitrogen oxide removal properties of the interstitial water permeable block 1 may be deteriorated. When the content of the photocatalyst powder exceeds 10 parts by weight, the weight ratio of cement may be lowered, so that the strength of the surface layer 12 may be lowered.

In particular, the photocatalyst powder has a particle size of 0.1 to 1.0 μm, a specific surface area of 140 cm2/g or more, a density of 3.0 to 4.5 g/cm3, and a pH of 6 to 8.5, and it is preferable to use a powder of titanium dioxide having a crystalline phase of anatase. do.

Titanium dioxide is a material that satisfies various conditions required for a photocatalytic material, and has not only abundant reserves in terms of resource materials, but is also an eco-friendly material and has very chemically and biologically stable properties.

In addition, when titanium dioxide powder is irradiated with ultraviolet rays having energy of a certain level or higher on the surface of the catalyst material, electron transfer occurs on the particle surface, and thus holes may be created. The holes created in this way react with oxygen or water in the air to form a compound with strong oxidizing power to sterilize bacteria on the surface of the catalyst material and control harmful substances.

The zeolite serves to induce the pozzolan reaction and exert a curing control function, and can contribute to the realization of air and water quality purification characteristics of the interstitial water permeable block (1).

When the content of zeolite is less than 5 parts by weight based on 100 parts by weight of cement, the air and water purification characteristics of the interstitial water permeable block 1 may be deteriorated. When the content of zeolite exceeds 30 parts by weight based on 100 parts by weight of cement, the weight ratio of the cement may be lowered and the strength of the surface layer 12 may be reduced.

In the present invention, the zeolite has an innumerable porous structure and has a high cation exchange capacity (CEC), so it has excellent adsorption capacity for cations such as nitrogen and heavy metals. It acts so that no ions remain and reacts completely, preventing the occurrence of whitening, and can be used as a carrier or for the purpose of removing odors, nitrogen and heavy metals.

In addition, zeolite is a porous mineral material, and metal stearic acid, sodium hydrogen carbonate (NaHCO 3 ) and magnesium oxide may be impregnated therein. In this case, the odor removal effect of zeolite is further increased.

Metallic stearic acid exhibits an excellent deodorizing effect against odors such as ammonia and amines as well as hydrogen sulfate and mercaptan. Any metal ion contained in metal stearic acid may be ionically bonded to a substance that causes a bad odor to form a complex ion, but in the present invention, iron (III) stearate may be used.

Sodium bicarbonate (NaHCO3) is a weakly alkaline substance and is the most used deodorant. It can effectively remove volatile substances or addictive compounds by neutralizing odor molecules, and it can remove odors by reacting with volatile organic acids.

Magnesium oxide supports the functions of iron (III) stearate and sodium bicarbonate (NaHCO3), and due to their synergistic action, the deodorizing effect can be further maximized.

The impregnation method is performed by mixing 1 to 5 parts by weight of iron (III) stearate, 1 to 5 parts by weight of sodium bicarbonate (NaHCO3), and 0.1 to 1 parts by weight of magnesium oxide in an aqueous solution based on 100 parts by weight of zeolite, followed by mixing at room temperature. It can be carried out by stirring and adding the synthetic zeolite to the aqueous solution and maintaining it for 3 to 24 hours.

Diatomaceous earth plays a role in inducing the pozzolan reaction and exerting the curing control function, and has porous adsorption performance, which can contribute to increasing the photocatalytic reaction and heat shielding performance of the interstitial water permeable block (1).

When the content of diatomaceous earth is less than 5 parts by weight based on 100 parts by weight of cement, the heat shielding properties and nitrogen oxide removal properties of the interstitial water permeable block 1 may be deteriorated. When the content of diatomaceous earth exceeds 30 parts by weight based on 100 parts by weight of cement, the weight ratio of the cement may be lowered and the strength of the surface layer 12 may be reduced.

Since zeolite and diatomaceous earth have the property of absorbing moisture easily, heat can be dissipated by evaporation of moisture, thereby improving the heat shielding properties of the block.

Water can serve to increase the ease of mixing of the composition for forming the surface layer. When the content of water is less than 15 parts by weight based on 100 parts by weight of cement, it may be difficult to express strength because the amount of water to promote the hydration reaction of cement is small. When the content of water exceeds 30 parts by weight based on 100 parts by weight of cement, side fullness may occur due to an excessive amount of water.

The mixed fiber serves to block heat, and may be manufactured by mixing two or more fibers having excellent heat resistance performance, and may contribute to the implementation of the heat shielding properties of the interstitial water permeable block 1 .

In this case, the mixed fiber may be composed of Oxi-PAN (Oxidized PolyAcryloNitrile) fiber and polyphenylene sulfide fiber, and may be prepared by mixing the two fibers while passing them through a roller.

The mixed fiber of Oxi-PAN (Oxidized PolyAcryloNitrile) fiber and polyphenylene sulfide fiber may be in a mixed form in a ratio of 1:1 to 1:2, and the mixed fiber is 3.0 to 6.0 vol% of the entire surface layer. may be included.

When the content of the mixed fibers is less than 3.0 vol% of the entire surface layer, the heat blocking effect may be insufficient. When the content of the mixed fibers exceeds 10.0 vol% of the entire surface layer, economic efficiency may be lowered due to material cost, and adhesive strength may be lowered due to an excessive content.

The manufacturing method of the crevice permeable block of the present invention comprises the steps of mixing cement, coarse aggregate, fine aggregate, and water, putting it in a mold, and compacting it to form the base layer 11, cement, white aggregate, black aggregate, fine alumina powder , photocatalyst powder, zeolite, diatomaceous earth, water and mixed fibers are mixed and laminated on the base layer 11 and then compacted to form the surface layer 12 .

3 is a front view of the gap permeable block 1 in which the guide groove 41 is formed according to an embodiment of the present invention.

In the upper surface of the protrusion 40 , a guide groove 41 for guiding the movement of water to the guide groove 20 may be formed to be depressed downwardly. The guide groove 41 may be formed to extend in a straight line toward the guide groove 20, and the cross section may have a U-shaped, V-shaped, ┗┛-shaped or inverted trapezoidal shape. In this case, a plurality of guide grooves 41 may be provided, and may be spaced apart from each other by a predetermined interval and disposed in parallel.

For this reason, the gap-permeable block 1 is guided so that the rainwater existing on the upper surface of the protrusion 40 moves toward the guide groove 20 , and the rainwater moved to the guide groove 20 is directed toward the permeable groove 30 . Guided to move, it can be quickly pitched into the ground.

4 is a cross-sectional view taken along line A-A' of FIG. 3 .

The depth D3 of the guide groove 41 may be 1.3 mm to 1.7 mm, and the interval G1 between the guide grooves 41 adjacent to each other may be 6 mm to 10 mm. In this case, the guide groove 41 may be formed to have a depth D3 gradually increasing from the center of the protrusion 40 toward the guide groove 20 .

The depth and spacing of the guide grooves 41 described above are derived in consideration of both safety of pedestrians and permeability of rainwater.

5 is an exemplary view of the first use of the gap-permeable block (1) according to an embodiment of the present invention.

Interstitial permeable blocks 1 may be arranged in a plurality of rows and columns on the ground. At this time, the gap-permeable blocks 1 of each row (A to C) and each column (D to I) may be arranged in a straight line.

Here, any one of the gap-permeable blocks 1 may be positioned so that the side edge abuts the side edge of the adjacent block, and the guide groove 20 may be arranged in a straight line with the guide groove of the adjacent block.

6 is a second example of use of the gap-permeable block (1) according to an embodiment of the present invention.

The gap-permeable block 1 may be arranged in a plurality of rows and columns on the ground. At this time, the gap-permeable blocks 1 of each row (A to C) are arranged in a straight line, and the gap-permeable blocks (1) of odd rows (A, C) and even rows (B) may be alternately arranged, The interstitial permeable blocks 1 of each row D to I may be arranged in a zigzag form.

Here, any one of the gap-permeable blocks 1 may be positioned so that its side edge abuts the side center of the adjacent block, and the guide groove 20 may be arranged in a straight line with the guide groove of the adjacent block.

On the other hand, although not shown in the drawings of the present invention, the gap-permeable block 1 may be arranged in a plurality of rows and columns on the ground, and the gap-permeable blocks 1 of each column (D to I) are in a straight line. Doedoe odd-numbered columns (D, F, H) and even-numbered columns (E, G, I) interstitial permeable blocks (1) can be arranged alternately with each other, and the interstitial permeable blocks (1) in each row (A to C) ) can be arranged in a zigzag form.

Here, any one of the gap-permeable blocks 1 may be positioned so that the side edge abuts the side center of the adjacent block, and the guide groove 20 may be arranged in a straight line with the guide groove of the adjacent block.

All of the above-described arrangements form a relatively large gap between a pair of interstitial permeable blocks 1 adjacent to each other, so that rainwater can quickly permeate into the ground.

The above description of the present invention is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a dispersed form, and likewise components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention.

1: niche pitcher block
10: block body
20: guide groove
30: pitching home
40: protrusion

Claims (5)

In the gap-permeable block in which a plurality are repeatedly installed in the horizontal or vertical direction to form a surface on the ground,
A block body in the form of a hexahedron including a base layer and a surface layer formed on the upper surface of the base layer,
an induction groove extending long toward the side of the block body on the upper surface of the block body and guiding the movement of water;
It is formed extending along the width direction to be connected to the guide groove on the side surface of the block body and includes a permeable groove for permeating the water moving along the guide groove into the ground,
The base layer includes cement, fine aggregate, and coarse aggregate,
The surface layer is cement, white aggregate, black aggregate, alumina fine powder, photocatalyst powder, zeolite, diatomaceous earth, and Oxi-PAN (Oxidized PolyAcryloNitrile) fiber and polyphenylene sulfide (Polyphenylene Sulfide) fiber, characterized in that it comprises a mixed fiber A niche pitcher block.
delete According to claim 1,
The guiding grooves are provided in plurality, characterized in that they are arranged to cross each other, a slit permeable block.
According to claim 1,
The guiding groove is characterized in that arranged in a straight line with the guiding groove of another interstitial permeable block disposed adjacent, the interstitial permeable block.
According to claim 1,
The protrusion formed on the upper surface of the block body by the guide groove is characterized in that the guide groove for guiding the movement of water to the guide groove is formed on the upper surface to extend toward the guide groove, the gap permeable block.

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