KR101294897B1 - Attaching uneven groove seaweed having a trapezoidal-type artificial reefs and production methods - Google Patents

Abstract

PURPOSE: A trapezoidal artificial fish reef and a manufacturing method thereof are provided to prevent marine algae from being separated from the fish reef due to typhoons. CONSTITUTION: A method for manufacturing a trapezoidal artificial fish reef comprises the following steps: preparing a mold which is formed with a polygonal upper surface part (21), is formed with a lateral part (22) for connecting the upper surface part to a lower part, is formed with a support leg (30) on the edge of the lower part, is formed with an opening (20) on the upper surface part, the lateral part, and the lower part, and is formed with a moving path, is made of a steel material having an irregular surface for attaching marine algae; mixing a polyester resin and a hardening agent and coating the inside of the upper surface part and the lateral part with the mixture; attaching glass fibers to the coated surface and additionally applying the mixture to the glass fibers; closing the mold by installing a latticed frame made of a polyethylene material and pouring concrete; and disassembling the mold and curing.

Description

Attaching uneven groove seaweed having a trapezoidal-type artificial reefs and production methods}

The present invention relates to a trapezoidal concave-convex artificial reef providing an uneven groove for attaching seaweeds. More specifically, as the trapezoidal concave-convex artificial reef made of the concave-convex surface and the concave-convex surface on the outer frame of the artificial reef and the concave-convex groove formed on the concave-convex surface, the concave-convex groove and the “V” -shaped groove It is easy to attach algae to the outer frame of artificial reefs, and provides space for shelling and spawning. The present invention also relates to a trapezoidal concave-convex artificial reef having an uneven groove for attaching algae, which has an opening formed in the upper flat part, the side part, and the lower part to facilitate the algae communication and supply a large amount of oxygen and nutrients.

In general, artificial reefs protect the water resources by providing artificial structures for laying spawning areas, as well as hiding places such as coastal fish and benthic fish and shellfish inhabiting the offshore. It is used for the purpose of raising fish resources to promote the growth of fry through the growth of phytoplankton and algae.

Reefs, which are a form of fishing grounds with favorable conditions for fish gathering, occur frequently at the ridges of the seabed where fishes gather, and depending on their shape, width, depth, and geology, they are called reefs, reefs, and states. In the vicinity of these reefs, ascending and descending flows occur along the terrain, causing the circulation of seawater to become active, and the plankton also grows in large quantities, resulting in a natural fish food chain that forms a good fishery.

However, in recent times, natural reefs are gradually increasing due to environmental changes due to water temperature rise due to environmental pollution and photosynthesis inhibition of algae, and many of the reefs are gradually disappearing. The reduction of these reefs leads to the reduction of fish that use them to feed and hide.

Therefore, in order to prevent the decline of fish reefs, the group of artificial reefs has recently been formed on the coastal seabed to enable the aquatic plants such as algae to grow and protect naturally or artificially within a short time, and thus provide a habitat for fishes to increase fishes. To promote.

Artificial reefs create an environment in which algae can attach to and propagate, and fish can live or lay nests around the artificial reefs, and abalone, seashells, and other small animals that feed on the seaweed Allows a lot of marine animals to grow. In addition, fisheries resources, which are the target of coastal fishing, can be overfished, and artificial reefs are an obstacle when dragging the net, which also protects the fry from the fishing nets with high fishing efficiency.

However, since conventional artificial quadrangles or hemispherical artificial reefs have a very simple shape, the various shellfishes and seaweeds on the surface of the reefs can not easily grow due to their easy survival at the seeding stage, There is a narrow space where horses can hide from their natural enemies.

In addition, since the spores or artificial seedlings of seaweeds were attached to the artificial reefs, the surface of the algae spores and artificial seedlings were difficult to conceive even if the seaweed spores or artificial seedlings were attached to the artificial reefs.

As a result, there is a limit in restoring the coastal fishing grounds that are not properly progressed in the formation of the marine forests, and there are many problems in creating the marine forests in the desolated waters with only artificial reefs.

In order to solve this problem, the present invention forms a "V" groove on the outer frame of the trapezoidal uneven artificial reef, so that a large number of implanted seaweeds can be firmly fixed by being attached to the artificial reef. And trapezoidal grooves with seaweed attachment recesses and grooves that provide space for habitation and spawning of shellfish, and openings are formed at the upper flat portion, the side portion and the lower portion to facilitate the communication of algae and to supply oxygen and nutrients in large quantities. To provide an uneven artificial reef.

Korean Patent Laid-Open Publication No. 10-2004-0111218 discloses a functional spherical artificial reed with horns and legs. The artificial reed is composed of a leg and a horn body structure. The body structure is a spherical structure, and has a space inside. Korean Patent Laid-Open Publication No. 10-2011-0101757 discloses an artificial fish for flexible hunting, which comprises a bottom plate formed by curing a plurality of reinforcing bars and curing the concrete, And a porous ceramic plate formed by alternately inserting the connecting member inserted into the vertical bar and flowing vertically and horizontally, and mixing the loess and germanium powder and firing at low temperature. . Korean Patent Laid-Open Publication No. 10-2009-0015878 discloses a method for constructing a farm structure using a waste ship, comprising the steps of remodeling a waste vessel to install a farm structure on each layer of the internal structure, It is necessary to construct a concrete wall, PE, and PP coating film, and install a desalination plant, wastewater treatment plant, oxygen supply facility system, and a fish natural loading field at the bottom of the first floor farm, It is disclosed that a farm structure for constructing seawater, a deep water pipeline and an automatic switchgear system for smooth supply of deep seawater and inputting artificial fish seaweed for environment of fish is disclosed. Korean Patent Laid-Open Publication No. 10-0650268 relates to a facility for the construction of a marine forest using slag. The volume expansion ratio is adjusted to 0.2% or less by curing the covering material, dialysis material, and steelmaking slag manufactured by adjusting the size of steelmaking slag to mix and form Disclosed is a retaining wall structure and a sea forest and artificial reefs manufactured through the process. Korean Patent Laid-Open No. 10-0335013 discloses a composition for preparing a bioceramics artificial fish herb comprising shellfish shell powder, clay, kaolin and slag added to loess containing stonite, pyrophyllite and feldspar, Is mixed with water and then dried and sintered. The structure is dense so that there is no loosening in seawater and easy to assemble marine life. All the added ingredients are environmentally friendly since they are all natural natural materials. In addition, the surface of the manufactured structure has a fine porous structure, and thus the function of adsorbing or absorbing contaminants dissolved in seawater is clarified. However, these prior arts are simply artificial reefs aimed at providing spawning and habitat spaces for fish and shellfish, as well as spawning and spawning spaces for fry or plaques, which provide habitat and spawning space as in the present invention. In the process, the uneven groove and the "V" shaped groove in the artificial reef are made in the outer frame, which makes it easy to attach a large number of seaweeds, and provides a habitat space to prevent algae dropping by typhoons. Opening is formed to facilitate the algae communication, the configuration of the trapezoidal uneven artificial reef having an uneven groove for attaching algae that can supply a large amount of oxygen supply and nutrients is not disclosed and there is a difference.

The present invention is to solve the above problems, by making the grooves on the outer frame of artificial reefs seaweeds are firmly fixed to the surface of the uneven grooves naturally or artificially to prevent the fall of seaweeds due to typhoons, It is easy to inhabit and spawn shellfish in the "V" shaped groove connecting the uneven surface and uneven surface, and openings are formed in the upper flat part, side part and the lower part to facilitate the algae communication and supply a large amount of oxygen and nutrients. An object of the present invention is to provide a trapezoidal uneven artificial reef having an uneven groove for attaching algae.

The present invention as a means for solving the above problems, the outer frame having a three-dimensional shape is composed of a polygonal upper end portion having a predetermined area and a lower end portion having a larger area than the upper end portion, there is no bottom surface, Openings are formed in the side portion connecting the lower portion, the upper flat portion and the side portion and the lower portion is formed with a flow passage for communicating with the inside of the artificial reef, the uneven surface is formed on the upper flat portion and the side portion, the rough concrete upper portion The present invention provides a trapezoidal concave-convex artificial reef having a surface and having a concave-convex groove for attaching seaweed, characterized in that a plurality of lattice-shaped concave-convex grooves for attaching seaweed are formed.

The lattice-shaped concave-convex groove is attached with a rope for transplanting seaweed, and the concave-convex surface and concave-convex surface of the side part are connected to a “V” shaped groove so that shellfish can inhabit, and a trapezoidal shaped support leg at the bottom corner of the artificial reef. It provides a trapezoidal concave-convex artificial reef having a concave-convex groove for forming seaweeds.

In addition, the method of manufacturing the artificial reef of the present invention is formed in the upper surface portion and the side uneven surface for attaching seaweeds, and between the uneven surface and the uneven surface of the side portion is made of "∧" groove, to prepare a form formed of steel step; Applying a polyester resin to an upper surface portion, a side portion, and an inner surface at which an uneven surface for attaching seaweeds is formed; Attaching glass fibers to the surface of the polyester resin, and painting the polyester resin again; Closing the formwork and placing concrete by installing a lattice-shaped frame on the uneven surface for seaweed attachment; There is provided a trapezoidal concave-convex artificial reef having a concave-convex groove for attaching algae characterized by a method of curing and dismantling the formwork.

The polyester resin additionally mixes 1% by weight of the curing agent relative to the raw material, and provides a method of manufacturing a trapezoidal uneven artificial reef having an uneven groove for attaching seaweed, characterized in that the lattice-shaped frame is made of polyethylene.

The present invention forms a concave-convex surface made of coarse concrete in the upper flat portion and the side of the artificial reef to ensure that the algae is firmly fixed by natural or artificial engraftment to prevent the fall of the algae in the blue due to the typhoon, which is more stable than the existing reefs It provides an environment, and forms a “V” shaped groove that connects the uneven surface to facilitate the breeding and spawning of shellfish. Openings are formed in the upper flat part, the side part, and the lower part to facilitate the communication of algae, and to supply oxygen and nutrients. By supplying large amounts of fish, it has a role to provide better habitat for shellfish.

Figure 1 shows a conventional artificial fish candle.
Figure 2 shows a perspective view of a trapezoidal uneven artificial reef having an uneven groove for attaching seaweed of the present invention.
Figure 3 shows a perspective view of the concave-convex surface and the V-shaped groove of the trapezoidal concave-convex artificial reef having the concave-convex groove for seaweed attachment of the present invention.
Figure 4 shows a state in which seaweeds engrafted in the grooves and grooves of the trapezoidal concave-convex artificial reef having an uneven groove for seaweed attachment of the present invention.
5 shows a state in which a rope is implanted with seaweeds between the uneven grooves of a trapezoidal uneven artificial reef having an uneven groove for attaching seaweed according to the present invention.
Figure 6 shows a flow chart of a method for manufacturing a trapezoidal uneven artificial reef having an uneven groove for attaching seaweed of the present invention.
Figure 7 shows a full perspective view of the artificial reef prepared according to the artificial reef manufacturing method sequence of the present invention.
Figure 8 shows a side view photograph of the artificial reef prepared in accordance with the artificial reef manufacturing method sequence of the present invention.
Figure 9 shows a front and back photograph of the artificial reef prepared in accordance with the artificial reef manufacturing method sequence of the present invention.
Figure 10 shows a top perspective view of the artificial reef prepared according to the artificial reef manufacturing method sequence of the present invention.
Figure 11 is a photograph showing the lower and uneven surface of the artificial reef prepared by the artificial reef production method of the present invention.

In order to achieve the object of the present invention, the configuration of the present invention is an outer frame having a three-dimensional shape consisting of a polygonal upper planar portion 21 having a predetermined area and a lower area without a bottom surface having a larger area than the upper planar portion 21. The side passage 22 connecting the upper flat portion 21 and the lower end and an opening 20 are formed in the upper flat portion 21, the side portion 22, and the lower portion to communicate with the inside of the artificial reef. Can be formed. In addition, an uneven surface is formed in the upper flat portion 21 and the side portion 22, and a plurality of uneven grooves are formed in a lattice shape on the uneven surface.

The grid-shaped uneven groove may be attached to the rope for transplanting seaweed, the uneven surface of the side portion 22 is connected to the "V" shaped groove 23 so that shellfish can inhabit and spawn, the artificial reef At the bottom corner, a trapezoidal shaped support leg 30 may be formed. The material of the outer frame constituting the artificial reef is manufactured using concrete having a certain porosity, and the concrete is poured by applying glass fiber to the inside of the formwork. It can be made of a rough surface than conventional concrete.

In addition, the manufacturing method of artificial reefs is made in the order of formwork, formwork installation, concrete placing, formwork dismantling, and curing as with other concrete artificial reefs. Is applied by adding 1% by weight of the curing agent to the raw material, and attaching the glass fiber to the coated surface, and attaching the lattice-shaped frame made of polyethylene material and then removing the formwork. It is possible to provide an artificial reef with rough lattice irregularities and rough surface.

Hereinafter, with reference to the accompanying drawings, a detailed configuration and embodiments related to a trapezoidal uneven artificial reef providing an uneven groove for attaching seaweed of the present invention will be described in detail. In the following description of the present invention, when it is determined that the detailed description of the known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof is omitted.

Figure 1 shows a conventional artificial fish candle. Conventional artificial fishes are generally composed of a quadrangular artificial fish or a hemispherical artificial fish as shown in FIG. 1, and the fish itself has a very simple shape. Therefore, various shellfishes and seaweeds on the surface of the artificial fishes are hard to easily move at the seeding stage, and they are dropped into artificially selected sea areas without considering the environment of the activated organisms, so that even if seaweeds are conceived, they are difficult to grow However, it was merely a limited use of various fry and spatters in a narrow space formed inside the fish reef as a space where they could hide from their natural enemies.

Figure 2 shows a perspective view of a trapezoidal uneven artificial reef having an uneven groove for attaching seaweed of the present invention. The outer frame having a three-dimensional shape includes a polygonal upper planar portion 21 having a predetermined area; It is made of a lower portion having a larger area than the top plane portion 21 and no bottom surface; A side portion 22 connecting the upper flat portion 21 and the lower portion; An opening 20 is formed in the upper flat portion 21, the side portion 22, and the lower portion to form a flow passage formed in communication with the interior of the artificial reef.

A suitable embodiment shape of the trapezoidal concave-convex artificial reef providing the concave-convex groove for attaching the seaweed of the present invention is a rectangular top planar portion 21 of a predetermined area; A lower portion having a wider area than the upper plane portion 21 and no bottom surface; Side portion 22 has a constant inclination angle, a rectangular opening 20 is formed in the center of the inclined surface is formed with a flow passage for communicating with the inside, there may be a space of a predetermined area on both sides of the opening (20). In addition, the front portion may connect the upper flat portion 21 and the lower portion without an inclination angle, and may have a trapezoidal opening 20 having a short upper portion and a long lower portion.

Openings 20 are formed in the upper flat portion 21, the side portion 22, and the lower portion to facilitate the flow of algae, and supply a large amount of oxygen and young salt to provide shellfish with a better habitat environment. The damage caused by birds can be reduced by facilitating bird communication in the event of high waves.

In addition, the shade 20 is provided by the opening 20 to form a narrow space of the inner space of the reef, so that it can be manufactured to be optimized for hiding and growth of the algae. Bridges can be made to ensure the stability of artificial reefs.

A plurality of uneven grooves are formed in a predetermined area uneven surface on both sides of the opening 20 of the upper flat portion 21 in a lattice shape, and uneven surfaces are formed in the predetermined area spaces on both sides of the opening part 20 of the side part 22. It is formed, "V" shaped grooves (23) connecting the plurality of irregularities and concave-convex surface is formed is easy to form and spawn shellfish, a plurality of lattice-shaped concave-convex grooves are formed on the top of the concave-convex surface Seaweed can be firmly attached.

The shape of the artificial reef is described as the above structure, but is not limited thereto, and may be modified into various polygonal structures, and the size and shape of the opening 20 and the groove of the inclined surface formed in the outer frame may be appropriately changed. These artificial reefs are provided with a feeding function and a hiding function from predators by the algae habitat, thereby providing an optimal hide for shellfish and shellfish such as abalone and conch.

In addition, the upper end is narrower and the lower end is wider so that artificial reefs are not inverted or separated by external fluid forces such as waves or tides, so the center of gravity is given as a trapezoidal shape to prevent the fall and movement. It can be installed in coastal waters or in seas with severe waves.

Thus, by manufacturing the artificial trout of the truncated trapezoidal shape as a whole, it is possible to prevent the fishing gear such as the mesh caught on the grass during the operation. In fact, the damage caused by fishing gears lost to artificial reefs during fishing in the fishing grounds that are dropped for the purpose of forming new fishing grounds is very serious, and the fishing gears remain in the sea to prevent the growth of algae. Since the caught fish decay and pollute the surroundings, rather than surrounding the reefs to become a pollution source of the sea, if the artificial reef in the truncated trapezoidal shape as in the present invention can effectively prevent such catches.

Figure 3 shows a perspective view of the concave-convex surface and the V-shaped groove 23 of the trapezoidal concave-convex artificial reef having the concave-convex groove for attaching seaweed of the present invention. The upper flat portion 21 of the artificial reef outer frame has a space having a predetermined area on both sides of the opening 20, and a plurality of "_∏_" shaped irregularities in the center of the space may be manufactured in a lattice shape. . In addition, the side surface portion 22 is formed with a plurality of uneven surface in the space portion on both sides of the opening 20, the uneven surface and the uneven surface is connected by the "V" shaped groove 23, the top of the uneven surface Uneven grooves are made in plural lattice shape.

In particular, in the process of manufacturing formwork, the composition is differentiated from the conventional method of manufacturing the poncho, and the polyester resin is additionally mixed with 1% by weight of a curing agent, and the cement is placed by attaching a lattice-shaped frame made of polyethylene. The artificial reef structure completed after dismantling the mold is provided with a lattice-shaped concave-convex groove and a rough surface of the artificial reef concave-convex surface which do not exist in the existing artificial reef.

The “V” shaped groove 23 connecting the uneven surface and the uneven surface has a wide contact area, thereby facilitating habitat and spawning of shellfish, and the uneven groove surface is concave and convex, floating in the sea. The larvae of seaweeds such as seaweed and kelp, shellfish such as abalone and seashells are naturally or artificially grown to promote the habitat of shellfish and seaweeds, and ultimately to quickly create abundant marine forests and feed them. It can provide habitat for shellfish, etc., and serve as a structure suitable for maintaining the ecosystem and resource creation of coastal fisheries.

Figure 4 shows a state in which seaweeds engrafted in the grooves and grooves of the trapezoidal concave-convex artificial reef having an uneven groove for seaweed attachment of the present invention. In general, the transplantation of algae can be carried out by dipping the algae larvae into a tank containing the algae larvae so that the algae larvae engraft themselves. However, FIG. 4 shows a state in which algae naturally grows in artificial reefs and is attached to uneven grooves, and shows a state in which larvae floating in the sea live in the uneven grooves. In this case, the roots of the algae are wrapped around the uneven grooves to prevent algae from falling due to typhoons due to typhoons due to the initial stability of the algae attachment and the firm root fixation after the algae maturation, thus providing a more stable algae habitat environment.

5 shows a state in which a rope is implanted with seaweeds between the uneven grooves of a trapezoidal uneven artificial reef having an uneven groove for attaching seaweed according to the present invention. In other words, the artificial sea-grafted ropes are installed between the uneven grooves, and the seaweeds artificially implanted in the ropes are wrapped in the uneven grooves to wrap the uneven grooves so that the external oil such as waves or algae may be caused by the firm root fixation after the algae maturation. It prevents algae from falling off due to physical strength, and ultimately, it can quickly create abundant marine forests to maximize the effect of fish's fakeness. As the habitat is created to promote growth, it can be used as a habitat and spawning place for fish or fry.

Figure 6 shows a flow chart of the trapezoidal concave-convex artificial reef manufacturing method having a concave-convex groove for attaching seaweed of the present invention.

Artificial Reef Manufacturing Method

a) forming an uneven surface for attaching seaweed to the top flat portion 21 and the side portion 22, and the uneven surface of the side portion 22 is formed of “∧” grooves, preparing a form formed of steel;

b) applying a polyester resin to the upper surface portion 21 and the side portion 22, the inner surface formed with the seaweed attachment uneven surface of the formwork;

c) attaching the glass fiber to the surface of the polyester resin;

d) applying a polyester resin;

e) installing a lattice-shaped frame on the uneven surface for seaweed attachment to close the formwork and pour concrete;

f) It consists of curing and dismantling the formwork.

Figure 7 shows a full perspective view of the artificial reef prepared in accordance with the artificial reef manufacturing method sequence of the present invention, Figure 8 is a side view photograph of the artificial reef prepared according to the artificial reef manufacturing method sequence of the present invention, Figure 9 is a view of the present invention The front and back photos of artificial reefs manufactured according to the method of manufacturing artificial reefs are shown, and FIG. 10 shows a top perspective view of the artificial reefs manufactured according to the method of manufacturing artificial reefs of the present invention.

The method of manufacturing a trapezoidal uneven artificial reef having an uneven groove for attaching algae of the present invention is made of a formwork, formwork installation, concrete placing, formwork dismantling, curing in the same order as existing artificial reefs, c) and d) The method of production is different from the method of production. Figure 11 shows a picture of the lower and uneven surface of the artificial reef prepared by the artificial reef production method of the present invention.

That is, during the formwork process, the artificial reef structure is completed after dismantling the form by applying a polyester resin with a structure different from the conventional method of manufacturing the fish and attaching a lattice-shaped frame made of polyethylene material. It has lattice-shaped grooves and grooves of artificial reefs with rough surface roughness.

The material used to construct artificial reefs is relatively easier to manufacture than waste tires or steel reefs, and the seaweeds are more easily formed by increasing the porosity of the surface by adjusting the mixing rate of gravel, etc. It can be done. The large amount of iron that is eluted from the blast furnace slag contained in the concrete is an inorganic nutrient, which helps to grow algae, and because the material cost is low and the manufacturing process is simple, the production cost is low. Has the advantage that it can.

Conventional artificial reefs are composed of only a number of frames or plates, so even if spores or artificial seedlings of algae are attached to artificial reefs, their surface is smooth and the area that can be inhabited is small, making them difficult to conceive. There was a difficulty in restoring the coastal fishing grounds that were deteriorated because the formation of marine forests did not proceed properly.

In order to prevent this point, in the present invention, when the formwork is made, the glass fiber is attached and the concrete is poured to make the surface rougher than the existing concrete so that the algae grow easily, and ultimately, abundant sea forests are quickly formed to collect fish. Can be maximized.

The polyester resin applied to the form side and the top side additionally mixes a hardener in an amount of 1% by weight, thus forming a foundation for adhering glass fibers to the form made of steel as a coating. The fiberglass is cut and placed on the basis of the coated polyester resin, and the polyester fiber is coated again to fix the glass fiber to the formwork.

By attaching a lattice-shaped frame made of polyethylene material to the fixed glass fiber part, algae is naturally or artificially entrained in the lattice-shaped concave-convex groove made in the cured artificial reef, so that the algae root is wrapped around the concave-convex groove formed with the rough surface. Due to the initial stability of attachment and firm root fixation, it is possible to prevent the artificial reef from falling or falling off due to external fluid force such as waves or algae.

By forming the uneven groove and the "V" shaped groove 23 in the artificial reef having such a structure, it is easy to attach a large number of seaweeds, and provides a space for habitation and spawning of shellfish, and the top flat portion 21 and the side portion. Openings 20 are formed at the lower portion 22 and the lower portion, so that the algal forest can be formed to facilitate the algae communication and supply a large amount of oxygen and nutrients.

By using trapezoidal uneven artificial reefs that provide uneven grooves for seaweed attachment, various types of fry and plaques can hide from natural enemies, and the uneven grooves and V-shaped grooves make it easy to attach many seaweeds and shellfish. It provides a space for habitation and spawning to enhance the level and profitability of aquatic communities, and it is effective for use in a wide range of applications, from small fishes for shellfish to large fishes for fish and shellfish. Securing resources can greatly contribute to promoting fisheries.

10: trapezoidal uneven artificial reef with uneven groove for attaching seaweed
20: opening 21: top plane
22: side portion 23: "v" groove
25: Seaweed transplanting rope 26: seaweed
30: support leg

Claims (5)

a) an outer frame having a three-dimensional shape includes a polygonal upper planar portion having a predetermined area; A lower portion having a larger area than the upper surface portion and having no bottom surface, and having a side portion connecting the upper portion and the lower portion; At the bottom corner, a trapezoidal support leg is formed, and an opening is formed at the top flat part, the side part, and the bottom part, and a flow passage is formed in communication with the inside of the artificial reef; Preparing a formwork made of steel having an uneven surface for seaweed attachment formed of “∧” grooves in the upper flat portion and the side portion;
b) applying an additional 1% by weight of a polyester resin and a hardening agent to the inner surface of the upper surface and the side of the side portion on which the uneven surface for attaching seaweeds is formed;
c) attaching the glass fiber to the surface on which the polyester resin is applied, and additionally mixing and coating 1% by weight of the polyester resin and the hardener relative to the raw material;
e) closing the formwork and placing concrete by installing a lattice-shaped frame made of polyethylene material on the inner surface of the upper surface and the side of which the uneven surface for seaweed attachment is formed;
d) A method of manufacturing a trapezoidal uneven artificial reef having an uneven groove for attaching seaweed, characterized in that it is produced by dismantling the formwork.
A trapezoidal uneven artificial reef having an uneven groove for attaching seaweed prepared by the method of claim 1 delete delete delete

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