KR101456581B1 - Method for manufacturing incombustible fiber reinforced plastic rod, and reinforcing method of tunnel using the rod - Google Patents

Method for manufacturing incombustible fiber reinforced plastic rod, and reinforcing method of tunnel using the rod Download PDF

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Publication number
KR101456581B1
KR101456581B1 KR1020140000641A KR20140000641A KR101456581B1 KR 101456581 B1 KR101456581 B1 KR 101456581B1 KR 1020140000641 A KR1020140000641 A KR 1020140000641A KR 20140000641 A KR20140000641 A KR 20140000641A KR 101456581 B1 KR101456581 B1 KR 101456581B1
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South Korea
Prior art keywords
resin
rod
reinforcing
retardant
flame
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KR1020140000641A
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Korean (ko)
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조남욱
이종천
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한국건설기술연구원
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/02—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising combinations of reinforcements, e.g. non-specified reinforcements, fibrous reinforcing inserts and fillers, e.g. particulate fillers, incorporated in matrix material, forming one or more layers and with or without non-reinforced or non-filled layers
    • B29C70/021—Combinations of fibrous reinforcement and non-fibrous material
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/14—Lining predominantly with metal

Abstract

The present invention relates to a non-combustible fiber-reinforced plastic reinforcing rod made of a non-combustible material which is installed in place of a reinforcing bar in a tunnel to reinforce the strength of a tunnel and is not damaged by fire, a method of manufacturing the reinforcing rod, and a method of repairing and reinforcing a concrete structure using the same. A core rod made of a flame-retardant or noncombustible resin material, which is inserted in one direction so as to extend in a long rod-shaped reinforcing wire made of a solid material by mixing glass powder with phenol resin or melamine resin therein; A method for producing a flame-retardant thermoplastic resin composition comprising mixing a methylol melamine resin with an inorganic flame retardant, dispersing the flame retardant with a solvent, diluting the resin with water and impregnating the flame retardant fiber with the resin aqueous solution, And a flame-retardant sheath material which is thermocompression-bonded directly to the set temperature and pressure.

Description

Technical Field [0001] The present invention relates to a method of manufacturing a non-combustible fiber-reinforced plastic reinforcing rod, and a tunnel reinforcement method using the same. BACKGROUND ART < RTI ID = 0.0 >

The present invention relates to a non-combustible fiber reinforced plastic (FRP) reinforcing rod and a method of repairing and reinforcing a concrete structure. More particularly, the present invention relates to a method of reinforcing a non-combustible fiber reinforced plastic Fiber reinforced plastic reinforcing rod, a method of manufacturing the fiber reinforcing plastic reinforcing rod, and a repairing and reinforcing method of a concrete structure using the same.

Reinforcing bars embedded in concrete structures such as tunnels generally degrade the strength of concrete structures due to various environmental factors. Fiber reinforced polymer (FRP) reinforcements have been developed to reinforce degraded concrete structures. The fiber reinforced plastic reinforcement has advantages of easy construction because it has no fear of corrosion, has excellent strength and light weight, and is applied for maintenance and reinforcement of existing concrete structures in various forms such as sheets, panels, and rods.

However, in spite of many advantages mentioned above, the fiber reinforced plastic reinforcement is being developed as a bar similar to a reinforcing bar to overcome the form limitations used only as a reinforcing material of an existing structure. The rod-shaped fiber-reinforced plastic reinforcement is widely used without any new / existing concrete, and it can be applied widely to existing concrete structures requiring increased load-bearing capacity due to decrease in strength due to corrosion-resistant reinforcing bars and new concrete structures To increase the service life of concrete structures and reduce maintenance costs.

The fiber-reinforced plastic reinforcement has excellent tensile performance, but is deformed when the fire is weak due to heat, so that it can not perform the reinforcing function. Particularly, in the tunnel, there are many factors that cause fire due to collision of the vehicle, and in case of such a fire, the fiber reinforced plastic reinforcement embedded in the tunnel structure is likely to be deformed or damaged by heat.

Korean Registered Patent No. 10-0311054 (registered date: September 22, 2001): a rod member for repair / reinforcement of a concrete structure and for reinforcing a newly- Korean Registered Patent No. 10-1043809 (Date of Registration June 16, 2011): Fiber Reinforced Polymer Reinforcing Material, Method of Manufacturing the Reinforced Concrete Structure Using the Method

An object of the present invention is to provide a fiber-reinforced plastic reinforcing rod having a nonflammable property which provides an excellent tensile force and is not deformed or damaged by heat at a high temperature when a fire occurs, and a method of manufacturing the same have.

Another object of the present invention is to provide a method for repairing and reinforcing a tunnel by using the incombustible fiber-reinforced plastic reinforcing rod.

In order to achieve the above object, a non-combustible fiber-reinforced plastic reinforcing rod according to the present invention is characterized in that an elongated bar-shaped reinforcing wire rod made of a solid body is inserted with phenol resin or melamine resin mixed with glass powder therein to extend in one direction A core rod made of a flame retardant or incombustible resin; A method for producing a flame-retardant thermoplastic resin composition comprising mixing a methylol melamine resin with an inorganic flame retardant, dispersing the flame retardant with a solvent, diluting the resin with water and impregnating the flame retardant fiber with the resin aqueous solution, And a flame-retardant sheath material which is thermocompression-bonded directly to the set temperature and pressure.

A method of manufacturing a nonflammable fiber-reinforced plastic reinforcing rod according to the present invention comprises the steps of: impregnating a thermosetting resin solution containing an inorganic flame retardant into a reinforcing wire and drawing and forming the core rod; A method of producing a resin aqueous solution by mixing a methylol melamine resin and an inorganic flame retardant, diluting the mixture with a solvent and diluting it with water, impregnating the resin aqueous solution with the flame retardant fiber, Molding the jacket material; And adhering the flame-retarded sheath material in the prepreg state to the surface of the core rod, and adhering the flame-retardant sheath material to the core rod with the set temperature and pressure.

According to another aspect of the present invention, there is provided a method of manufacturing a tunnel, comprising: forming buried grooves along a longitudinal direction on a wall surface of a tunnel; Fixing a rod bracket having a C-shaped holder opened downward to the inside of the buried groove; Inserting the non-combustible fiber-reinforced plastic reinforcing rod of the present invention into the holder; And inserting cement mortar into the buried grooves and filling the cement mortar with the cement mortar. The tunnel reinforcement method using the incombustible fiber-reinforced plastic reinforcing rod is provided.

Since the nonflammable fiber reinforced plastic reinforcing rod of the present invention is composed of a noncombustible core rod and a nonflammable sheath material, the reinforcing rod is not damaged or deformed by high heat even when a fire occurs in the tunnel, and the circular shape is maintained to prevent damage to the concrete wall of the tunnel It provides an advantage that can be done.

In particular, the incombustible fiber-reinforced plastic reinforcing rod of the present invention is advantageous in that the core rod and the incombustible sheath material are directly bonded to each other by a heat-pressing method without an adhesive, and therefore, the incombustible sheathing material contains microcapsules containing phase- The capsule has a merit that the incombustible effect can be further improved by phase change while absorbing heat energy.

According to the tunnel repairing and reinforcing method of the present invention, since the reinforcing rod is stably installed only by inserting the reinforcing rod into the holder from the lower side of the holder of the rod bracket, it is easy to install the reinforcing rod, So that the structure strength of the concrete wall can be further improved.

FIG. 1 is a partially cut away perspective view of a nonflammable fiber-reinforced plastic reinforcing rod according to an embodiment of the present invention. FIG.
2 is a longitudinal sectional view of the incombustible fiber-reinforced plastic reinforcing rod of Fig. 1;
3 is a longitudinal sectional view of a non-combustible fiber-reinforced plastic reinforcing rod according to another embodiment of the present invention.
4 is a flowchart showing an embodiment of a method for manufacturing a nonflammable fiber-reinforced plastic reinforcing rod according to the present invention.
FIG. 5 is a front view of the drawing-forming apparatus for manufacturing the incombustible fiber-reinforced plastic reinforcing rod according to the present invention.
FIG. 6 is a plan view of the drawing and forming equipment of FIG. 5; FIG.
Fig. 7 is a flow chart illustrating the steps of manufacturing the core rod during the manufacture of the incombustible fiber-reinforced plastic reinforcing rod according to the present invention.
FIG. 8 is an exploded perspective view illustrating a tunnel repairing and reinforcing structure according to the present invention. FIG.
9 and 10 are vertical cross-sectional views showing the tunnel maintenance and reinforcing structure of FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a non-combustible fiber-reinforced plastic reinforcing rod according to the present invention will be described in detail with reference to the accompanying drawings.

1 and 2, a non-combustible fiber-reinforced plastic reinforcing rod 1 according to an embodiment of the present invention includes a core rod 2 in the form of an elongated circular rod, And a flame-retardant jacket material 5 directly bonded thereto.

The core rod 2 is made by drawing and molding a flame retardant resin obtained by mixing a thermosetting resin containing an methylol group and an inorganic flame retardant and has excellent flame retardancy or incombustibility. In order to improve the strength, the core rod 2 has a long and thin rod- Is inserted in one direction.

Preferably, the reinforcing wire 3 is composed of 15 to 25% by weight of a phenol resin or a melamine resin, 75 to 85% by weight of a glass powder, . In this embodiment, the reinforcing wire 3 has a round bar shape having a long and constant diameter, but may also be a bar shape having a polygonal cross section such as a square or a hexagon.

Unlike the reinforcing fibers accommodated in the conventional fiber-reinforced plastic, the reinforcing wire 3 has a very good tensile strength as a solid wire rod, and has elasticity to be instantly restored when bent. Therefore, the core rod 2 has a strength equivalent to that of the reinforcing bar 3 due to the reinforcing wire materials 3.

On the outer surface of the core rod 2, a plurality of grooves 4 are formed in a lattice structure. As described in more detail below, the grooves 4 prevent the microcapsules 7 contained in the incombustible cover material 5 from being destroyed by preventing the pressure from being applied when the incombustible cover material 5 is heated and pressed For the purpose of.

The flame-retardant sheathing material 5 is made of a flame-retardant resin substantially the same as the core rod 2 and bonded to the outer surface of the core rod 2 to increase the strength of the core rod 2, Sheet (FRP sheet). The flame-retardant sheathing material 5 is formed by mixing a methylol melamine resin and an inorganic flame retardant, dispersing the mixture with a solvent, diluting it with water, impregnating the flame retardant fiber 6, (1) or both surfaces of the core rod (2) at a set temperature and pressure under prepreg condition. Since the flame-retardant covering material 5 contains melamine resin, when the core rod 2 is heated and pressed at a predetermined temperature and pressure in the prepreg state, the melted resin component of the core rod 2 and the flame- Is directly bonded to the outer surface of the core rod 2 without an adhesive by acting as an adhesive.

The flame-retardant covering material 5 is prepared by mixing 20 to 30% by weight of methylol melamine resin with respect to the total weight of the resin aqueous solution and 10 to 25% by weight of the inorganic flame retardant with respect to the total weight of the resin aqueous solution, % By weight of a solvent and dispersing it in water of 50 to 60% by weight based on the total weight of the aqueous resin solution. When the content of the methylol melamine resin, the inorganic flame retardant, the solvent and the water in the aqueous resin solution exceeds the above range, the physical properties of the flame retardant sheath material 5 as the final product, such as specific gravity, , The flexural strength, the flexural modulus, and the abrasion resistance are lowered, so that it is preferable to keep the above content range.

The inorganic flame retardant mixed in the methylol melamine resin is at least two selected from the group consisting of aluminum hydroxide, magnesium hydroxide, zinc borate, triammonium phosphate and antimony trioxide. The amount of the inorganic flame retardant is 30 to 50 By weight. The methylol melamine resin has an advantage of improving bonding strength with the flame retardant fiber. In addition, when two or more kinds of the above inorganic flame retardant materials are used in the above-mentioned weight% range, it is easy to dissolve in water, and it is easy to mix and dilute with a resin in an aqueous solution state and the flame retardant can be dispersed And does not emit volatile organic pollutants (VOCs) after molding of the resin.

On the other hand, the flame-retardant jacket material 5 contains a plurality of microcapsules 7 in order to further improve the bonding strength with the core rod 2 while providing more excellent nonflammability. The microcapsules 7 may be mixed with a mixture of the methylol melamine resin and the inorganic flame retardant in the process of impregnating the mixture of the methylol melamine resin and the inorganic flame retardant into the flame retardant fiber 6. [ The microcapsule 7 has a structure in which a core material of a phase change material that absorbs heat is accommodated in an outer shell layer of a synthetic resin material. When a fire occurs, the outer shell layer is broken by heat at a high temperature, .

When the outer layer of the microcapsule 7 contains melamine resin, when the non-combustible envelope 5 is pressed onto the core rod 2, the outer layer of the microcapsule 7 may contain melamine resin. It is possible to obtain an effect that the bonding force between the incombustible cover material 5 and the core rod 2 is further improved by the melamine resin while being broken.

The core material of the microcapsule 7 is a phase change material containing a paraffinic hydrocarbon or dimethylpropanediol (DMP) or hydroxymethyl-methyl-propanediol (HMP) It works to help the incombustibility effect.

The microcapsules 7 may be broken by pressure when the flame retardant sheath material 5 is pressed against the core rod 2 and the microcapsules 7 are formed on the inner side of the flame retardant fiber 6 ) Can be easily broken, so that the flame-retardant sheath material 5 can leave as many microcapsules 7 as possible after being bonded to the core rod 2.

Since a large number of grooves 4 are formed in the core rod 2 in a lattice structure, when the flame-retardant sheath material 5 is pressed onto the core rod 2, the portion corresponding to the groove 4 is weakened in pressure The possibility of breakage of the microcapsules 7 is minimized and the incombustible cover material 5 is firmly adhered to the core rod 2 only at the outer portion of the groove 4 which is normally subjected to the pressure.

The bonding between the core rod 2 and the flame-retardant covering material 5 may be performed using a sheet molding compound (SMC) method. That is, the flame-retardant sheath material 5 and the core rod 2 in the prepreg state are directly pressed onto the outer surface of the core rod 2 without adhesive by using SMC (Sheet Molding Compound) .

3, a flexible cushioning material 8 made of a flame-retardant material is additionally embedded in the inside of the groove 4 of the core rod 2, and the cushioning material 8 is provided with a non- The microcapsules 7 made of the same components as those contained in the ash 5 may be included to further improve the incombustibility.

The incombustible fiber-reinforced plastic reinforcing rod thus constructed is manufactured in the steps as shown in Fig.

Step S1: A step of fabricating the core rod 2 by impregnating the thermosetting resin solution containing the inorganic flame retardant into the reinforcing wire and drawing and forming

Step S2: Mixing the methylol melamine resin and the inorganic flame retardant, dispersing the mixture by adding a solvent, diluting the mixture with water to prepare an aqueous resin solution, impregnating the resin aqueous solution with the flame retardant fiber, Molding the flame-retardant jacket material (5)

Step S3: a step of bringing the flame-retardant sheath material 5 in the prepreg state into close contact with the surface of the core rod 2, adhering the flame-retardant sheath material 5 to the core rod 2 with a set temperature and pressure,

The step (S1) of drawing the core rod (2) is performed by using the drawing and forming equipment as shown in Figs. 5 and 6.

The drawing and forming apparatus shown in FIGS. 5 and 6 is a drawing apparatus in which a reinforcing wire feeder 10 to which a reinforcing wire rod 3 is fed, and a resin aqueous solution supply unit 10 that feeds a resin aqueous solution, The resin impregnated portion 20 impregnated with a plurality of reinforcing materials and the resin material-reinforcing wire material 2a in a prepreg state supplied from the resin impregnation portion 20 are heated to remove moisture contained in the resin material- A preliminary forming unit 40 for preliminarily forming a preliminarily formed shape and size by applying heat and pressure while passing through the resin material reinforcing wire 30 passing through the dryer 30, (40) horizontally reciprocatingly movable along a pulling direction by a first linear moving means to move horizontally while applying heat and pressure to a resin material-reinforcing wire passed through the preforming section (40) To make the resin-reinforced wire rod (50) which is horizontally reciprocally movable along a pulling direction by a second linear moving means at one side of the movable press machine (50), and which passes through the movable press machine (50) And a drawer (60) for gripping the reinforcing wire and horizontally moving the wire so as to pull the reinforcing wire with a predetermined length.

The dryer 30 applies heat to the resin material-reinforcing wire material 2a in the prepreg state at 100 to 250 DEG C to dry the moisture contained in the resin material-reinforcing wire material. The dryer 30 includes a heater (not shown), a blower fan (not shown), and a condenser (not shown) to remove moisture and gas from the resin material-reinforcing wire material 2a by continuously circulating hot air . The moisture removed from the resin material-reinforcing wire material 2a by the dryer 30 is approximately 50 to 60% of the total moisture content, and a part of the residual moisture is removed from the preformer 40. If moisture is not sufficiently removed from the resin-reinforced wire rod 2a, the strength and flame retardancy of the core rod 2 as a final product can not be ensured. Therefore, work for removing water and gas must be performed.

The preformed portion 40 is preliminarily formed into a predetermined shape and size by applying heat and pressure while passing through the resin material-reinforcing wire material 2a passing through the dryer 30, and at the same time, residual gas and moisture are removed This is the part where the process takes place. The preformed portion 40 is composed of a block structure in which a tapered slit 41 is gradually opened so that the tapered slit 41 is gradually reduced toward the traveling direction so that the resin- And a heater (not shown) for removing gas and moisture by applying heat to the resin material-reinforced wire 2a.

The movable press 50 is horizontally reciprocally movable in the pulling direction by a first linear moving means such as a pneumatic / hydraulic cylinder at the rear of the preform 40 and passes through the preform 40 The work is horizontally moved while applying heat and pressure to a resin-reinforced wire rod 2a, thereby pulling the resin-reinforced wire rod 2a and molding it. The movable press 50 preferably pressurizes the resin material-reinforcing wire material 2a at a pressure of 15 to 200 kg / cm 2 under a temperature condition of 120 to 200 ° C. Reinforced wire rod 2a is made of a core rod 2 having a nonflammable or flame retardant property by applying heat and pressure set to the resin-reinforced wire rod 2a by the movable press machine 50. [

In this embodiment, the movable press 50 is constituted of two sets, and reciprocates horizontally with a constant stroke. The movable press machine 50 includes a press lower mold 52 in which a cavity (not shown) corresponding to the resin material-reinforcing wire material 2a is formed and a lifting motor A press upper mold 53 which is vertically movably provided by the upper press mold 54 and presses the resin material reinforcement wire 2a on the press lower mold 52 at a predetermined pressure, 53) and / or a heater (not shown) provided in the press lower mold 52.

The drawing and forming method of the core rod 2 using the above-described draw-forming apparatus will be described with reference to FIGS. 5 to 7. FIG. First, a thermosetting resin containing a methylol group and an inorganic flame retardant are mixed with the resin impregnating portion 20, followed by dispersing and diluting with a solvent to prepare an aqueous resin solution (Step S11). Then, the reinforcing wire 3 is impregnated into the resin aqueous solution in the resin impregnating portion 20 and made into a resin-reinforced wire material in a prepreg state (Step S12).

Next, the resin-reinforced wire rod is horizontally moved by a predetermined length in one direction and dried in the dryer 30 at a temperature of 100 to 250 ° C for a predetermined time to remove water and gas (step S13) - While the reinforcing wire is horizontally moved by a predetermined length, residual heat and pressure are applied by the preforming unit 40 to remove residual moisture and gas, and preformed into a predetermined size and shape (S14). After the preliminarily molding, the preformed resin material-reinforcing wire material is pressurized to a set pressure under a set temperature condition using the movable press machine 50 to form the final core rod 2, and the resin- And horizontally moves by a predetermined length in one direction (step S15). Then, the resin-reinforced wire rod is finally cooled and cut to a predetermined length to produce the core rod 2 (step S16).

After the incombustible core rod 2 in which the reinforcing wire 3 is embedded is drawn and molded in the same manner as described above, the incombustible cover material 5 to be bonded to the outer surface of the core rod 2 is manufactured (step S2).

The flame-retardant sheathing material 5 is prepared by mixing a methylol melamine resin and an inorganic flame retardant, dispersing the mixture with a solvent and diluting it with water to prepare an aqueous resin solution, then impregnating the aqueous resin solution with the flame- To form a semi-dried prepreg plate.

In step S3, the flame-retardant cover material 5 in a prepreg state is brought into close contact with the surface of the core rod 2 by using a press molding equipment such as an SMC (Sheet Molding Compound) equipment, and the flame- 5 are thermally pressed and bonded to the core rod 2. At this time, as described above, the melamine resin component of the core rod 2 and the melamine resin component of the incombustible shell material 5 act as an adhesive, and the incombustible shell material 5 is firmly bonded to the surface of the core rod 2 . At this time, in the groove 4 of the core rod 2, the pressure applied to the incombustible shell material 5 is reduced, so that the microcapsules 7 are hardly damaged.

Next, with reference to FIGS. 8 to 10, a method for repairing and reinforcing a tunnel using the incombustible fiber-reinforced plastic reinforcing rod of the present invention will be described.

First, buried grooves 4 are formed on the wall surface 100 of the tunnel at a predetermined depth along the longitudinal direction. Then, a rod bracket 110 having a C-shaped holder 111 opened downward is fixed to the inside of the embedding groove 4. Next, the incombustible fiber-reinforced plastic reinforcing rod 1 of the present invention is inserted into the holder 111 of the rod bracket 110.

When the operation of installing the reinforcing rod 1 in the embedding groove 4 of the tunnel wall surface 100 is completed, the incombustible cover panel 103 is coupled to the lower side of the embedding groove 4, The cement mortar 102 is poured into the inside of the embedding groove 4 to fill it.

According to this tunnel maintenance and reinforcement method, since the reinforcement rod 1 is stably installed only by inserting the reinforcement rod 1 inside the holder 111 from the lower side of the holder 111 of the rod bracket 110, 1 can be easily installed and the reinforcement rod 1 can be installed and installed while minimizing the size of the embedding grooves 4, so that the structural strength of the concrete wall can be further improved.

As described above, since the incombustible fiber-reinforced plastic reinforcing rod 1 of the present invention is composed of the incombustible core rod 2 and the incombustible sheath material 5, even when a fire occurs in the tunnel, the reinforcing rod 1 is heated It is possible to maintain the original shape without being damaged or deformed, thereby preventing damage to the concrete wall of the tunnel.

The non-combustible fiber reinforced plastic reinforcing rod 1 of the present invention is advantageous in that the core rod 2 and the flame-retardant sheath material 5 are directly bonded to each other by a heat-pressing method without using an adhesive, The microcapsule 7 containing the phase change material is contained and the microcapsule 7 absorbs the heat energy when the fire occurs and the phase change is further improved to improve the incombustible effect.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention as defined by the appended claims. And it is to be understood that such modified embodiments belong to the scope of protection of the present invention defined by the appended claims.

1: reinforcing rod 2: core rod
3: reinforcement wire 4: groove
5: Flame-retardant sheath material 6: Flame retardant fiber
7: Microcapsule 8: Cushioning material
9: microcapsule 10: reinforcing wire feeder
20: resin impregnating portion 30: dryer
40: preforming part 50: movable press
60: Drawer 100: Tunnel wall
101: Recessed groove 102: Cement mortar
103: incombustible cover panel 110: rod bracket
111: Holder

Claims (12)

delete delete delete delete delete delete delete A core rod 2 made of a flame-retardant or noncombustible resin material in which a reinforcing wire rod 3 in the shape of an elongated rod made of a solid material is inserted into a phenolic resin or a melamine resin with a glass powder mixed therein; (6) is impregnated with a resin aqueous solution prepared by mixing a methylol melamine resin and an inorganic flame retardant, and dispersing the mixture by adding a solvent thereto and diluting with water. In the semi-dried prepreg state, And a flame-retardant jacket material (5) which is thermally pressed and bonded to the outer surface of the flame-retardant resin (2) at a set temperature and pressure, the method comprising:
(S1) of impregnating the thermosetting resin solution containing the inorganic flame retardant into the reinforcing wire 3 and drawing and forming the core rod 2;
A method of producing a resin aqueous solution by mixing a methylol melamine resin and an inorganic flame retardant, diluting the mixture with a solvent and diluting it with water, impregnating the resin aqueous solution with the flame retardant fiber, A step (S2) of molding the outer cover material (5);
The step S3 of adhering the flame-retardant sheath material 5 in the prepreg state to the surface of the core rod 2 and bonding the flame-retardant sheath material 5 to the core rod 2 with the set temperature and pressure ;
The step (S1) of manufacturing the core rod (2)
Mixing a thermosetting resin containing a methylol group and an inorganic flame retardant, and then adding and dispersing a solvent to prepare an aqueous resin solution (S11);
(S12) of impregnating the reinforcing wire into the resin aqueous solution and making it into a prepreg resin-reinforced wire;
(S13) of horizontally moving the resin-reinforced wire in one direction by a predetermined length and drying at a temperature of 100 to 250 DEG C for a predetermined time to remove water and gas;
(S14) removing residual moisture and gas by applying heat and pressure while horizontally moving the resin-reinforced wire material by a predetermined length, and preforming the resin-reinforced wire material into a predetermined size and shape;
(S15) of forming the preformed resin material-reinforcing wire material under a set temperature condition and forming the preformed resin material-reinforcing wire material by horizontally moving the resin material-reinforcing wire material by a predetermined length in one direction;
(S16) of cooling the resin material-reinforcing wire and cutting the resin-reinforced wire material into a predetermined length to form a core rod (S16).  The method according to claim 8, wherein in the step S13, the drying step of heating the reinforcing wire material impregnated with the resin aqueous solution in a dryer to remove moisture contained in the resin aqueous solution is performed. The non-combustible fiber-reinforced plastic material according to claim 8, wherein, in the step S15, the movable press moves in one direction while pressing the resin material-reinforcing wire under a temperature of 120 to 200 DEG C under a pressure of 15 to 200 kg / A method of manufacturing a reinforcing rod. Forming buried grooves (4) in the wall surface (100) of the tunnel along the longitudinal direction;
Fixing a rod bracket (110) having a C-shaped holder (111) opened downward inside the embedding groove (4);
Inserting a non-combustible fiber-reinforced plastic reinforcing rod manufactured by the manufacturing method according to any one of claims 8 to 10 into the holder (111);
And inserting cement mortar into the embedding groove (4) to fill the reinforcing fiber reinforcement rod. The method as claimed in claim 11, wherein the step of filling the cement mortar with the cement mortar inside the embedding groove (4) comprises closing the embedding groove (4) by connecting the incombustible cover panel (103) to the lower side of the embedding groove , And injecting cement mortar into the buried groove (4) to form the buried groove (4). [5] The method of claim 1,
KR1020140000641A 2014-01-03 2014-01-03 Method for manufacturing incombustible fiber reinforced plastic rod, and reinforcing method of tunnel using the rod KR101456581B1 (en)

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KR101049879B1 (en) * 2011-02-22 2011-07-15 주식회사 티에프티 Form and method for preparing non-combustible fiber reinforced platics
KR101333165B1 (en) * 2013-07-11 2013-11-27 주식회사 티에프티 Incombustible bushing for transformer and method for manufacturing the same

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KR20100130286A (en) * 2009-06-03 2010-12-13 에스케이케미칼주식회사 Fiber reinforced plastic bolt and method for producing the same
KR101049879B1 (en) * 2011-02-22 2011-07-15 주식회사 티에프티 Form and method for preparing non-combustible fiber reinforced platics
KR101333165B1 (en) * 2013-07-11 2013-11-27 주식회사 티에프티 Incombustible bushing for transformer and method for manufacturing the same

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