KR102428850B1 - Reinforcing material for civil engineering with surface reinforcing treatment and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a reinforcing material for civil engineering with a surface strengthening treatment and a method for manufacturing the same. According to an embodiment of the present invention, disclosed are a reinforcing material for civil engineering with a surface strengthening treatment and a method for manufacturing the same, wherein the reinforcing material for civil engineering used for ground reinforcement or slope reinforcement during civil engineering works is strengthened using stone powder and basalt fiber powder or chips, and accordingly, has strengthened characteristics such as surface friction, flame retardancy, abrasion resistance, ultraviolet rays resistance, frostbite and salt damage prevention.

Description

Reinforcing material for civil engineering with surface reinforcing treatment and manufacturing method thereof

The present invention relates to a reinforcing material for civil engineering that has been subjected to surface reinforcement and a method for manufacturing the same, wherein the surface of a reinforcing material for civil engineering used for ground reinforcement or slope reinforcement during civil engineering works is reinforced using stone powder and basalt fiber powder or chips It relates to a reinforcing material for civil engineering that has been treated to enhance surface friction, flame retardancy, abrasion resistance, UV resistance, frostbite and salt damage prevention properties, and a method for manufacturing the same.

Reinforcement of the slope of the fill or cut part during civil works, reinforcement of the ground such as roads or soft ground, structural reinforcement of retaining walls and earth structures, and filling materials such as rock or crushed stone Various types of reinforcing materials for civil engineering are used for purposes such as prevention of separation of

Examples of such reinforcing materials for civil engineering include a geogrid composed of a grid-like net shape, a band-like reinforcing material having a long elongated band, and a geocell manufactured in a three-dimensional shape of a honeycomb that can fill the interior with soil.

Geogrid can be divided into plastic geogrid and textile geogrid according to the manufacturing method and material.

As an example of a plastic geogrid, Korean Patent Application Laid-Open No. 10-1991-0005998 (published on April 27, 1991) is manufactured by passing a polymer sheet that has passed through an extruder through a roller, making holes in a grid-like grid form, and then stretching it uniaxially or biaxially. A geogrid was proposed. As another example of a plastic geogrid, WO 99/28564 (published on Oct. 10, 1999) discloses that a polymer is extruded in a strip form and stretched in one direction to make a warp and weft strip, and then use a laser or ultrasonic wave to create a warp strip. A geogrid joined in a lattice form was proposed.

As an example of a textile geogrid, Korean Patent Application Laid-Open No. 10-1998-0002337 (published on March 30, 1998) provides high-strength fibers in the warp and weft directions respectively to form a grid-type fabric, and protects the warp and weft yarns and protects them at the bonding point. A geogrid coated with polyvinyl chloride, bitumen, acrylic, latex and rubber-based resin was proposed to strengthen contact points and improve resistance to sunlight and UV rays. High-strength polyester is mainly used for warp and weft yarns.

As a modification, Korean Patent No. 10-0635207 (registered on October 10, 2006) discloses a fiber-reinforced polymer prepared in advance while extruding a polymer strip so that fibers exist in the polymer by supplying fibers to a co-extrusion die through which the extruded molten resin flows. A geogrid prepared in the form of a grid was proposed by supplying strips to the coextrusion strip in a grid shape, pressing and heating the overlapping radial strips and upward strips, and then bonding them.

The band-shaped reinforcing material is generally manufactured by coating the fiber core with a synthetic resin coating material.

As an example of a band-shaped reinforcing material, Korean Patent Registration No. 10-0911150 (registered on Jul. 31, 2009) discloses a method comprising: coating a fiber core with a synthetic resin coating material and double-injecting; forming a friction part and a binding part by pressing the covering material with a roller; cooling the molded cladding; forming a perforated hole in the binding portion; and winding a fiber reinforcement having a perforated hole formed therein.

Geocell generally extrudes a polymer material in the form of a sheet in an extrusion die, cuts it in the form of a strip having a certain width, and then superimposes several strips in a state of overlapping each layer by ultrasonic fusion at regular intervals. is made by

As an example of a geocell, Korean Patent Application Laid-Open No. 10-2019-0035884 (published on April 3, 2019) is composed of a flexible strip made of a sheet material, the flexible strips are arranged in rows and formed by ultrasonic welding or a thread. A geocell reinforced with reinforcing yarns comprising two or more fibrous elements joined together in a staggered sequence, the strips twisted along their entire length, is proposed.

However, the conventional reinforcement for civil engineering had the following limitations.

First, due to the characteristics of the reinforcing material for civil engineering made of polymer material, there is a limit in increasing the surface friction force between the soil and the reinforcing material for civil engineering because the surface is smooth. For example, general reinforcing materials for civil engineering lacked surface friction (pull-out force) compared to geogrids with ribbed galvanized steel sheets or reinforcing materials for civil engineering (reinforcing bars, etc.) equipped with passive resistors.

In addition, due to the nature of the reinforcing material for civil engineering made of polymer materials, the free surface exposed to the surrounding environment such as water and air is vulnerable to heat, which limits the formation of soil structures in high-temperature and high-humidity areas. There was a limit to being vulnerable to wildfires.

In addition, due to the nature of the reinforcing material for civil engineering composed of polymer materials, there is no problem in using soil as a backfill material for reinforcing soil. Although it can be used usefully in the field because of its sharpness, it was difficult to use it as a backfill material.

In addition, in the case of reinforcing materials for civil engineering made of polymer materials, construction is also carried out in places that come in contact with water such as the coast, rivers, or reservoirs. there was a need to

In addition, since the use of civil reinforcing materials is frequently occurring even in areas where the soil is contaminated due to the deposition of chemical residues such as industrial waste, factory wastewater, and sludge, the need for preventive measures due to biochemical contamination of reinforcing materials for civil engineering there was

Korean Patent Publication No. 10-1991-0005998 (published on April 27, 1991) PCT International Patent Publication WO 99/28564 (published on June 10, 1999) Korean Patent Publication No. 10-1998-0002337 (published on March 30, 1998) Korean Patent No. 10-0635207 (Registered on October 10, 2006) Korean Patent No. 10-0911150 (Registered on July 31, 2009) Korean Patent Publication No. 10-2019-0035884 (published on April 3, 2019)

The present invention was devised in view of the above problems, and the surface of a civil reinforcing material used for ground reinforcement or slope reinforcement during civil engineering works is reinforced using stone powder and basalt fiber powder or chips to provide surface friction. , An object of the present invention is to provide a reinforcing material for civil engineering that has been subjected to surface strengthening treatment with enhanced flame retardancy, abrasion resistance, UV resistance, frostbite and salt damage prevention properties, and a method for manufacturing the same.

According to one aspect of the present invention for achieving the above object, the reinforcing material core comprising a polymer material; and a coating layer coated on at least one surface of the reinforcing material core, including stone powder and basalt fiber powder or chips, and a surface-reinforced civil reinforcing material configured to include. Preferably, the weight part of the stone powder in the coating layer may be greater than the weight part of the basalt fiber powder or chips.

Preferably, the coating layer is composed of water glass and cement, stone dust, basalt fiber powder or chips.

Preferably, the coating layer comprises 10 to 30 parts by weight of water glass and cement, 75 to 85 parts by weight of stone powder, and 3 to 5 parts by weight of basalt fiber powder or chips.

Preferably, the coating layer comprises 10 to 30 parts by weight of water glass and cement, 65 to 75 parts by weight of stone powder, and 5 to 7 parts by weight of basalt fiber powder or chips.

Preferably, the stone dust has a particle size of 0.8 mm or less.

Preferably, the basalt fiber powder or chips have a diameter of 6-21 μm and a length of 3 cm or less.

Preferably, the coating layer is formed to a thickness of 0.4 mm or more.

Preferably, the reinforcing material core is an extrudate of a polymer material containing at least one of polypropylene (PP) and high-density polyethylene (HDPE), or polyester fiber, glass fiber, aramid fiber, carbon Fiber, stainless steel fiber, copper fiber, fiber yarn containing at least any one of amorphous metal fiber polyethylene (PE), polypropylene (PP), high-density polyethylene (HDPE), polyethylene terephthalate (PET), polyamides (polyamides) ), polyacrylates, polyacrylonitrile, polycarbonate (PC), polyvinyl chloride (PVC), polystyrene, polybutadiene, extruded from a material containing at least one Polyvinyl chloride (polyvinyl chloride (polyvinyl chloride) PVC), bitumen, acrylic, latex, and a fiber coating coated with a material containing at least one of a rubber-based resin.

Preferably, the reinforcement core is any one of a geogrid composed of a grid-like net shape, a belt-like reinforcement having a long elongated band shape, and a geocell manufactured in a three-dimensional shape of a honeycomb that can fill the interior with soil.

According to another aspect of the present invention, 1) comprising the steps of spraying a coating material comprising a stone powder and basalt fiber powder or chips on at least one surface of a reinforcing material core comprising a polymer material and having a sheet shape; and 2) pressing the reinforcing material core to which the coating material is attached.

Preferably, the present invention is configured to further include a; 3) spraying air on the surface of the reinforcing material core that has been compressed to remove the coating material residue incompletely attached to the reinforcing material core.

Preferably, the spraying of the coating material comprising stone powder and basalt fiber powder or chips is performed by spraying the coating material further comprising water glass and cement in the stone powder, basalt fiber powder or chips on at least one surface of the reinforcing material core in the form of a sheet. configured to be attached to

Preferably, the spraying of the coating material comprising stone powder and basalt fiber powder or chips is performed by spraying water glass and cement on at least one surface of the reinforcing material core configured in the form of a sheet, and spraying the coating material comprising stone powder, basalt fiber powder or chips to water glass And it is configured to be attached by spraying on the surface of the reinforcing material core to which the cement is attached.

The present invention as described above, the surface of the reinforcing material for civil engineering used for ground reinforcement or slope reinforcement during civil engineering works is reinforced using stone powder and basalt fiber powder or chips, and surface friction, flame resistance, abrasion resistance, UV resistance , there is an advantage of providing a reinforcing material for civil engineering that has been subjected to surface strengthening treatment to enhance frost and salt damage prevention properties, and a method for manufacturing the same.

1 is a schematic diagram of a geocell-type reinforcing material for civil engineering;
2 is a schematic view of a reinforcement for civil engineering in the form of a band-shaped reinforcement,
3 is a schematic diagram of a geogrid type of reinforcement for civil engineering;
Figure 4a and Figure 4b is a schematic cross-sectional view of a reinforcing material for civil engineering according to an embodiment of the present invention,
5a to 5c are schematic views of a process for manufacturing a reinforcing material for civil engineering according to an embodiment of the present invention.

The present invention may be embodied in various other forms without departing from its technical spirit or main characteristics. Accordingly, the embodiments of the present invention are merely illustrative in all respects and should not be construed as limiting.

The terms 1st, 2nd, etc. are used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but another component may exist in between.

As used herein, the singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as "comprises" or "comprising", "have" and the like are intended to represent the presence of elements or combinations thereof described in the specification, and the possibility that other elements or features may be present or added. It is not precluded.

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

1 is a schematic view of a geocell-type reinforcing material for civil engineering, FIG. 2 is a schematic view of a reinforcing material for civil engineering in the form of a band-shaped reinforcing material, FIG. 3 is a schematic view of a geogrid-type reinforcing material for civil engineering, FIGS. It is a schematic cross-sectional view of the reinforcement for civil engineering.

The reinforcing material for civil engineering of this embodiment includes a reinforcing material core (B) composed of a polymer material, stone powder and basalt fiber powder or chips, and a coating layer (C) coated on at least one surface of the reinforcing material core (B) is composed by

The reinforcement core (B) of this embodiment is a geogrid 300 configured in the form of a grid-like net, a belt-like reinforcement 200 having the form of an elongated band, and a honeycomb-shaped three-dimensional form that can fill the interior with soil. It may be any one of the manufactured geocells 100 .

The geogrid 300 may be divided into a plastic geogrid and a textile geogrid according to a manufacturing method and material. 3 illustrates an example of a textile geogrid. In Fig. 3, reference numeral 300a denotes a radial strip and 300b denotes a upward strip, respectively.

As an example, the plastic geogrid is manufactured by passing a polymer sheet (B) that has passed through an extruder through a roller, drilling holes in a grid-like grid form, and then stretching it uniaxially or biaxially. Such a geogrid has been exemplified in Korean Patent Application Laid-Open No. 10-1991-0005998 (published on April 27, 1991).

As another example, the plastic geogrid is manufactured by extruding a polymer in the form of a strip (B) and stretching it in one direction to make a radial strip and an upward strip, and then bonding them in a grid form using laser or ultrasonic waves. Such a geogrid has been exemplified in WO 99/28564 (published on June 10, 1999).

For example, the textile geogrid forms a grid-shaped fabric by supplying high-strength fibers (R) in the warp and weft directions, respectively, to protect the warp and weft yarns and strengthen the contact point at the bonding point, and improve the resistance to sunlight and UV rays. It is manufactured by coating (B) with polyvinyl chloride, bitumen, acrylic, latex, and rubber-based resin. Such a geogrid has been exemplified in Korean Patent Application Laid-Open No. 10-1998-0002337 (published on March 30, 1998).

As another example, the textile geogrid supplies fibers (R) to a co-extrusion die through which the extruded molten resin flows and extrudes the polymer strip (B) so that fibers exist in the polymer while co-extruding the pre-fabricated fiber-reinforced polymer strip. It is supplied in a grid shape with respect to the strip, and the overlapping radial and upward strips are pressed and heated, and then bonded to form a grid. Such a geogrid has been exemplified in Korean Patent No. 10-0635207 (registered on October 10, 2006).

The construction of the reinforcing material for civil engineering of this embodiment may be applied to the geogrid manufactured in various ways including the above example. Various known manufacturing processes of the above-described geogrid are expressed as process FP in FIGS. 5A to 5C for convenience of explanation.

The band-shaped reinforcing material 200 is generally manufactured by coating the fiber core with a synthetic resin coating material. Figure 2 illustrates a strip of reinforcement in this way.

As an example, the band-shaped reinforcing material is double-injected by coating the synthetic resin coating material (B) on the fiber core material (R), pressing the coating material with a roller to mold the friction part and the binding part, cooling the molded coating material, and perforating the binding part It is manufactured by forming a hole and winding a fiber reinforcement having a perforated hole. Such a band-shaped reinforcing material has been exemplified in Korean Patent No. 10-0911150 (registered on July 31, 2009).

The construction of the reinforcing material for civil engineering of the present embodiment may be applied to the band-shaped reinforcing material manufactured in various ways including the above example. Various known manufacturing processes of the above-described band-shaped reinforcing material are expressed as a process FP in FIGS. 5A to 5C for convenience of explanation.

In general, the geocell 100 extrudes a polymer material in the form of a sheet in an extrusion die and cuts and processes it in the form of a strip (B) having a certain width, and then overlaps several strips with each layer at regular intervals. It is manufactured by ultrasonic fusion at different positions. 1 illustrates an example of a geocell. In FIG. 1 , 100-1 and 100-2 denote flexible strips, respectively, and 100a denotes an ultrasonic welding part. For example, when the geocell 100 is applied as a vertical retaining wall structure, the flexible strip 100-1 located at the frontmost portion and exposed to the outside becomes a free surface of the geocell.

In one example, a geocell consists of flexible strips made of sheet material, the flexible strips arranged in rows and joined together in a staggered order by ultrasonic welding or threads, wherein the strips are twisted along their entire length. It may be reinforced with a reinforcing yarn comprising two or more fibrous elements. Such a geocell has been exemplified in Korean Patent Publication No. 10-2019-0035884 (published on April 3, 2019).

The construction of the reinforcing material for civil engineering of the present embodiment may be applied to geocells manufactured in various ways including the above example. Various well-known manufacturing processes of the above-described geocell are expressed as a process FP in FIGS. 5A to 5C for convenience of explanation.

From the viewpoint of the material, for example, the reinforcing material core (B) may be an extrudate of a polymer material including at least one of polypropylene (PP) and high-density polyethylene (HDPE). A geocell 100 or a plastic geogrid may be fabricated with this material configuration.

As another example, the reinforcing material core (B) is a fiber yarn including at least one of polyester fiber, glass fiber, aramid fiber, carbon fiber, stainless steel fiber, copper fiber, and amorphous metal fiber ( R) is polyethylene (PE), polypropylene (PP), high density polyethylene (HDPE), polyethylene terephthalate (PET), polyamides (polyamides), polyacrylates (polyacrylates), polyacrylonitrile (polyacrylonitrile), polycarbonate (PC), polyvinyl chloride (PVC), polystyrene (polystyrene), may be a fiber coating coated with a material containing at least one of polybutadiene (polybutadiene) extruded. The geocell 100, the strip reinforcement 200, or the textile geogrid may be manufactured with this material configuration.

As another example, the reinforcing material core (B) is a fiber yarn including at least one of polyester fiber, glass fiber, aramid fiber, carbon fiber, stainless steel fiber, copper fiber, and amorphous metal fiber ( R) may be a fiber coating coated with a material containing at least one of polyvinyl chloride (PVC), bitumen, acrylic, latex and rubber-based resin. Textile geogrids can be fabricated from these material configurations.

Of course, the above-described fiber material and polymer material are examples, and materials not illustrated may be applied.

Preferably, the coating layer (C) is composed of water glass and cement, stone powder, basalt fiber powder or chips.

Water glass and cement provide adhesion so that the coating layer (C) adheres to the reinforcement core (B). Water glass is a concentrated aqueous solution of sodium silicate (liquid) obtained by melting silicon dioxide and alkali. It can be obtained by melting a mixture of silica sand and soda ash at 1,300~1,500℃ and processing it in a low-pressure steamer. Water glass absorbs carbon dioxide in the air and gel-like silicic acid is precipitated, so it shows strong adhesion. Common Portland cement may be used as the cement. The main components of Portland cement are lime, silica, alumina, and iron oxide.

The mixing ratio of water glass and cement is not particularly limited, but may be mixed in the range of 2:8 to 8:2 parts by weight.

Stone dust is a by-product of the quarrying process. Stone dust is discharged in the form of powder during the cutting of raw stones, and discharged in a wet state by spraying water to prevent overheating of the cutting saw, which is generated as stone dust sludge of 0.8 mm or less through the sedimentation process. In this embodiment, stone dust made available as a raw material for recycling is utilized by drying the stone dust sludge due to natural surface exposure. In the case of using stone powder, the surface strength and adhesion of the reinforcing material for civil engineering are increased, and there is no need to import raw materials from abroad or to process raw materials in Korea separately in manufacturing, so there is an advantage that processing costs are not required. In addition, using stone dust, an industrial waste, has the advantage of reducing manufacturing costs.

In particular, the stone powder of this embodiment may include waste marble powder. Marble is commonly used as a building material, and the disposal of waste from marble factories in the form of very fine powder is one of the environmental problems worldwide today. For example, in this embodiment, the waste marble powder having a fineness of about 90% of particles passing through a 300 m sieve can be collected and used in a marble factory that processes marble.

Basalt fiber is a grayish-brown fiber made of basalt and melts at 1400°C. Limestone is sometimes added. Molten basalt is made into fibers by a centrifugal process. Basalt fibers can be made by jetting from fine nozzles. For example, basalt fibers are made of 50% silicon dioxide, 12% aluminum oxide, 11% calcium oxide, 10% magnesium oxide, 7% iron(II) oxide, 5% alkali metal oxides Na2O and K2O, 3% titanium(IV) oxide and It has an average chemical composition of 2% other oxides. Basalt fibers are used in insulating materials and fiber-reinforced building materials. In this embodiment, the basalt fibers are cut to a predetermined length and used in the form of basalt fiber powder or basalt fiber chips, and may include only basalt fiber powder or only basalt fiber chips, or both. The higher the ratio of the basalt fiber powder, the more the basalt fiber component is evenly distributed in the coating layer (C).

For example, the coating layer (C) is composed of 10 to 30 parts by weight of water glass and cement, 75 to 85 parts by weight of stone powder, and 3 to 5 parts by weight of basalt fiber powder or chips. Such a composition is particularly advantageous for increasing the surface strength, frictional force, and yarn protection function of the reinforcing material for civil engineering.

As another example, the coating layer (C) comprises 10 to 30 parts by weight of water glass and cement, 65 to 75 parts by weight of stone powder, and 5 to 7 parts by weight of basalt fiber powder or chips. Such a composition is advantageous in improving the waterproof and flame-retardant functionality of the reinforcing material for civil engineering and reducing the surface weight.

Preferably, the stone powder has a particle size of 0.8 mm or less. If the stone powder particle size is larger than this, the adhesion of the coating layer (C) may be reduced.

Preferably, the basalt fiber powder or chip has a diameter of 6-21 μm and preferably has a length of 3 cm or less. Basalt fiber powder can be understood as a particle having a diameter of 6 to 21 ㎛. If the diameter or length of the basalt fiber powder or chip is larger than this, the adhesion of the coating layer (C) may decrease, and if the diameter or length of the basalt fiber powder or chip is smaller than this, the fiber reinforcement effect may not be properly provided.

Preferably, the coating layer (C) is formed to a thickness of 0.4 mm or more. If the thickness of the coating layer (C) is smaller than this, the effect of providing the surface strength and frictional force, waterproofing, and flame retardant functions of the reinforcing material for civil engineering may not be sufficient.

For reference, from the viewpoint of frictional load transfer, the load transmitted per unit area of the civil reinforcing material depends on the interface characteristics and the normal stress between the soil and the civil reinforcing material. The analysis of the regional equilibrium of the cross section of the reinforcing material for civil engineering in the soil is given by the stress transfer condition as shown in Equation 1 below.

(However, b: the width of the reinforcing material for civil engineering,

l: length of reinforcement for civil engineering;

dl: unit length of reinforcement for civil engineering,

T: tensile force,

dT: Tensile force generated per unit length of civil reinforcing material

τ: shear stress occurring on the surface of the reinforcement for civil engineering)

If τ is generated by contact friction, the shear stress τ is obtained according to Equation 2 below.

: 토목용 보강재 상에 발생하는 수직응력, (only,

: Vertical stress generated on reinforcing materials for civil engineering,

μ: coefficient of friction between soil and reinforcing materials for civil engineering)

Therefore, when the friction coefficient of the reinforcing material for civil engineering is increased by the surface strengthening treatment of this embodiment, the shear stress generated on the surface of the reinforcing material for civil engineering is increased, and as a result, it can be seen that the tensile strength characteristics of the reinforcing material for civil engineering are further improved. .

5A to 5C are schematic views of a process for manufacturing a reinforcing material for civil engineering according to an embodiment of the present invention.

As a basic step of this embodiment, the reinforcement core B in the form of a geogrid, a band-shaped reinforcement or a geocell is formed through the various known manufacturing processes FP described above.

In step 1), a coating material including stone powder and basalt fiber powder or chips is sprayed on at least one surface of the reinforcing material core (B) including a polymer material and having a sheet shape.

As an example, referring to FIG. 5C , the spraying of the coating material including stone powder and basalt fiber powder or chips is a reinforcing material core (B ) is configured to attach to the surface by spraying it on at least one surface. 5C illustrates a case in which a coating material including stone dust, basalt fiber powder or chips, water glass, and cement is sprayed on the upper and lower sides of the reinforcing material core B configured in the form of a sheet, respectively (sprayers 120a and 120b). The coating material may be sprayed only on one side of the upper side or the lower side. In order to facilitate the spraying and application of the coating material, the coating material may be sprayed by further adding water in the same or similar proportion to the water glass and cement.

As another example, spraying of a coating material containing stone powder and basalt fiber powder or chips is performed by spraying water glass and cement on at least one surface of the reinforcing material core (B) in the form of a sheet, and including stone powder, basalt fiber powder or chips. It is configured to spray and attach the configured coating material to the surface of the reinforcing material core (B) to which the water glass and cement are attached. 5a and 5b show that water glass and cement are first sprayed on at least one surface of the reinforcement core (B) (blasters 10, 10a, 10b), and then stone dust, basalt fiber powder or chips are applied to the corresponding surface of the reinforcement core (B). An example of attaching by spraying to the sprayer is exemplified (injectors 20, 20a, 20b). The coating material may be sprayed on only one side of the upper or lower side, or it may be sprayed on both sides. Water in the same or similar proportions as water glass and cement may be further added and sprayed so that water glass and cement can be sprayed and applied smoothly.

Figure 4a illustrates a case where the coating material is sprayed on only one side (C), Figure 4b illustrates a case where the coating material is sprayed on both sides (Ca, Cb).

In step 1), the reinforcing material core (B) may be configured to spray the coating material after cooling is made in the extrudate state, and is preferably configured to spray the coating material before cooling in the extrudate state, and is configured to spray the coating material before cooling in the extrudate state It may be configured to dry the coating material together.

In step 2), the reinforcing material core (B) to which the coating material is attached is compressed.

Referring to FIGS. 5A to 5C , the compression of the reinforcing material core B to which the coating material is attached may be performed using compression rollers 30a and 30b installed opposite to the upper and lower sides, respectively.

In step 3), air is sprayed on the surface of the reinforcing material core (B) that has been compressed to remove the coating material residues incompletely attached to the reinforcing material core (B).

5A to 5C , the air may be sprayed using an air nozzle or air brushes 40, 40a, and 40b.

After step 3) is made, a post-process (PP) such as ventilation drying and/or winding, and other post-processing may be performed. Air drying may be done before step 3).

When the civil reinforcing material of this embodiment is applied to the geocell, there are the following advantages.

When the geocell is applied to the flat laying of slopes, rivers, or soft ground, the surface friction between the inner and outer walls of the geocell increases and the permissible bearing capacity of the base ground is increased even if the useful soil generated in the field is used as it is. .

When the geocell is applied to the vertical retaining wall structure, the inner geocell is applied for load support, and the outer geocell (free surface of the front part) with the coating layer is a vegetation retaining wall with a fire or forest fire prevention function. It can be used, and it is possible to increase the durability by preventing deterioration by ultraviolet rays, and to ensure stability as a soil structure.

When the civil reinforcing material of this embodiment is applied to a geogrid or a strip reinforcing material, there are the following advantages.

When the geogrid is applied to the reinforced soil retaining wall, the friction force between the soil and the reinforcement increases, and it is possible to use the armbarok as a backfill material.

General geogrid or strip reinforcement uses PE resin and asphalt coating on the surface to protect the PET fiber (yarn), so the surface of the reinforcement is smooth and the friction coefficient with the soil is small.

However, since the reinforcing material for civil engineering of this embodiment has a rough coating finish on the surface, the surface friction force between the soil and the reinforcing material increases, and the length of the reinforcing material applied to the field can be reduced by using these characteristics, material cost reduction and construction period This has the advantage of being shortened.

In addition, the reinforcing material for civil engineering of this embodiment can be applied to the soil structure using any soil (except clay) in the field, and since it maintains surface rigidity, the strength of the reinforcing material for civil engineering is also used as a backfill material with aggregate and burrock. The maximum retention rate can be ensured.

Although the present invention has been described mainly in terms of preferred embodiments with reference to the accompanying drawings, it will be apparent to those skilled in the art that many various and obvious modifications can be made therefrom without departing from the scope of the present invention. Accordingly, the scope of the present invention should be construed by the appended claims to cover many such modifications.

B: reinforcement core
C: coating layer

Claims (13)

a reinforcing material core comprising a polymer material; and
A coating layer comprising stone powder and basalt fiber powder or chips and coated on at least one surface of the reinforcing material core;
Reinforcing material for civil engineering, characterized in that the weight part of the stone powder in the coating layer is greater than the weight part of the basalt fiber powder or chip.
According to claim 1,
The coating layer is
A reinforcing material for civil engineering with surface reinforcement, characterized in that it comprises water glass and cement, stone dust, basalt fiber powder or chips.
According to claim 1,
The coating layer is
A reinforcing material for civil engineering with surface reinforcement, characterized in that it comprises 10 to 30 parts by weight of water glass and cement, 75 to 85 parts by weight of stone powder, and 3 to 5 parts by weight of basalt fiber powder or chips.
According to claim 1,
The coating layer is
A reinforcing material for civil engineering with surface reinforcement, characterized in that it comprises 10-30 parts by weight of water glass and cement, 65-75 parts by weight of stone powder, and 5-7 parts by weight of basalt fiber powder or chips.
According to claim 1,
The stone powder is a reinforcing material for civil engineering, characterized in that it has a particle size of 0.8 mm or less.
The method of claim 1,
The basalt fiber powder or chip has a diameter of 6 to 21 μm and a surface-reinforced reinforcement for civil engineering, characterized in that it has a length of 3 cm or less.
According to claim 1,
The coating layer is a reinforcement for civil engineering, characterized in that formed to a thickness of 0.4 mm or more.
The method of claim 1,
The reinforcing material core,
Polypropylene (PP), or an extrudate of a polymer material containing at least one of high-density polyethylene (HDPE),
Polyester fiber, glass fiber, aramid fiber, carbon fiber, stainless steel fiber, copper fiber, a fiber yarn containing at least one of amorphous metal fiber polyethylene (PE), polypropylene (PP), High-density polyethylene (HDPE), polyethylene terephthalate (PET), polyamides, polyacrylates, polyacrylonitrile, polycarbonate (PC), polyvinyl chloride (PVC), polystyrene ), or a fiber coating coated with a material containing at least one of polybutadiene,
Polyvinyl chloride (PVC), bitumen, acrylic (polyvinyl chloride (PVC), bitumen, acrylic ( Reinforcing material for civil engineering with surface reinforcement, characterized in that it is a fiber coating coated with a material containing at least one of acrylic), latex, and rubber-based resin.
The method of claim 1,
The reinforcing material core,
A geogrid composed of a grid-like net shape, a band-like reinforcement having a long elongated band shape, and a geocell made in a three-dimensional honeycomb shape that can fill the interior with a surface-reinforced treated surface Reinforcing materials for civil engineering.
1) spraying a coating material including stone powder and basalt fiber powder or chips on at least one surface of a reinforcing material core including a polymer material and having a sheet shape; and
2) compressing the reinforcing material core to which the coating material is attached;
In the coating layer formed by the coating material, the weight part of the stone powder is greater than the weight part of the basalt fiber powder or chip.
11. The method of claim 10,
3) removing the coating material residue incompletely attached to the reinforcement core by spraying air on the surface of the reinforcing material core that has been compressed;
11. The method of claim 10,
Spraying of the coating material containing stone dust and basalt fiber powder or chips,
A method for manufacturing a reinforcing material for civil engineering, characterized in that it is configured to attach a coating material comprising stone powder, basalt fiber powder or chips further comprising water glass and cement to at least one surface of a reinforcing material core configured in a sheet form to attach to the surface.
11. The method of claim 10,
Spraying of the coating material containing stone dust and basalt fiber powder or chips,
Spraying water glass and cement on at least one surface of the reinforcing material core in the form of a sheet,
A method for manufacturing a reinforcing material for civil engineering, characterized in that the coating material comprising stone dust, basalt fiber powder or chips is sprayed onto the surface of the reinforcing material core to which water glass and cement are attached.

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