KR102187170B1 - Frp reinforced concrete structures with fire resistance - Google Patents

Abstract

A refractory finished FRP reinforced composite concrete material is disclosed. The fire-finished FRP-reinforced composite concrete material according to the present invention includes: a concrete material in which a long groove is formed along the longitudinal direction of one or more reinforcing surfaces; FRP reinforcement which is fixed to the inside of the long groove by high fire resistance epoxy bonding to support and supplement the bending load applied to the concrete material; And a shielding mortar made of a heat-resistant material that is entirely closed on the reinforcing surface on which the FRP reinforcement is fixed so that the FRP reinforcement is shielded from external heat. According to the present invention, the FRP reinforcement made in the form of a module to the concrete material in which the long groove in which the FRP reinforcement is located is integrally molded or the long groove is formed by cutting, etc. is firmly fixed by a high fire resistance epoxy that bonds and fixes it in the long groove. , FRP reinforcement and high fire resistance epoxy are overlapped, so that the structural stability of concrete can be guaranteed to a certain level even in high-temperature environments. Regardless of the versatility, it is possible to achieve versatility that is easily applied, and workability in which reinforcement and fire-resistance treatment is easily performed only by external work on concrete without mobilizing large-scale facilities.

Description

FRP reinforced composite concrete with fire-resistant finish {FRP REINFORCED CONCRETE STRUCTURES WITH FIRE RESISTANCE}

The present invention relates to a fire-finished FRP-reinforced composite concrete material, and more particularly, a reinforcement method is easily performed with only a simple external operation for newly installed or already installed concrete, and FRP and epoxy used as reinforcing materials are external It relates to a fire-finished FRP reinforced composite concrete that can effectively shield from high heat.

In the conventional method of reinforcing a structure using Fiber Reinforced Polymer Composites (FRP), a fiber-reinforced composite material is attached to the outside of the structure using epoxy (adhesive) or the like, The reinforced composite material was adhered using an epoxy adhesive to reinforce the structure.

However, this bonding method has a problem that it is easy to lose the fixing power to FRP due to damage or damage in an environment of epoxy slip, external impact, and high temperature (approximately 65°C, which is the glass transition temperature of epoxy), and is particularly vulnerable to fire. there was.

Among the prior technologies related to the reinforcement method using FRP as above, Republic of Korea Patent No. 1618252 (announcement date: May 4, 2016) describes the technology for a fiber reinforced plastic (FRP) reinforcement device and a structure reinforcement method using the same. It is starting.

The present prior art includes an FRP core 10 in which a plurality of fiber bundles 1 are entirely impregnated with a resin to have a bar shape; An anchor mount 20 in the form of a circular rod or a polygonal rod impregnated with resin in the form of a roving perpendicular to the FRP core 10; Using a fiber reinforced plastic (FRP) reinforcing device including an anchor 30 fixed to the hole (H) surrounding the outer surface of the anchor mount 20, (a) spraying resin together with fibers on the surface of the structure Constructing a first fiber reinforced coating layer 50; (b) inserting the anchor 30 of the fiber reinforced plastic (FRP) reinforcing device into the hole H of the structure to cover the first fiber reinforced coating layer 50.

However, the prior art described above has the advantage that the reinforcing performance is further improved because the FRP core is more firmly fixed on the surface of the structure and the end peeling can be prevented, but the coating layer after installing the fiber reinforced plastic (FRP) reinforcement device Due to the repetitive spraying of resin together with fibers on the surface of the structure for the construction and covering steps, excessive processing time is inevitably required to solidify resin, and in the case of construction on the reinforcing surface facing the ground, the sprayed resin does not fall. There is a problem in that it is difficult to shorten the construction time, which is a topic in the construction field, with the proposed process steps in that a separate structure installation or equipment must be accompanied.

In particular, in recent years where ignition due to vehicle defects, fires due to non-implementation of buildings, fires due to arson or negligence, etc. are frequently occurring, structural stability of buildings against fires is becoming more important. As the contrast is still not presented in detail, a structural solution is needed.

An object of the present invention is that it is possible to secure a certain level of structural stability for a concrete structure even in a high temperature environment by overlapping the FRP, which is a reinforcing material vulnerable to heat, and an epoxy for bonding from external heat, and to be applied to both newly constructed or installed concrete. It is to provide a fireproof finished FRP reinforced composite concrete that can be easily reinforced only by external work on concrete without mobilizing large-scale facilities.

The object is a concrete material in which a long groove is formed along the longitudinal direction of one or more reinforcing surfaces; FRP reinforcement which is fixed to the inside of the long groove by high fire resistance epoxy bonding to support and supplement the bending load applied to the concrete material; And it is achieved by a fire-resistant finished FRP reinforced composite concrete, characterized in that it comprises a heat-resistant material shielding mortar that is completely closed on the reinforcing surface to which the FRP reinforcement is fixed so that the FRP reinforcement is shielded from external heat.

The shielding mortar may be a mortar having heat resistance, high adhesion, rapid setting and horizontal maintenance.

The concrete material is spaced apart in the longitudinal direction of one or more reinforcing surfaces, and may be formed such that a plurality of short grooves face each other along the width direction on both sides adjacent to the reinforcing surface.

The composite concrete material is embedded and fixed in the inner side of the short groove by filling mortar with one end anchored to the inside of the concrete material in order to support and supplement the multidirectional shear load applied to the concrete material, and the other end It may include a rod-shaped metal reinforcement which penetrates the shielding mortar and is protruding and fixed to the outside.

The composite concrete material includes a fireproof board disposed so as to be in close contact with the front surface of the shielding mortar in a state penetrated by the other end of the metal reinforcement and fixed by a nut coupled with a thread formed on the other end of the metal reinforcement. I can.

In the layer on which the shielding mortar is finished, an elongated refractory member of heat-resistant material fixed to the elongated groove as if surrounding the FRP reinforcement is disposed along the longitudinal direction of the elongated groove, and the elongated refractory member does not expose the elongated groove to the outside. A main shielding plate made of a heat-resistant material to cover and shield the long groove while a part is inserted into the long groove; And a fitting part protruding from the main cover plate in a state spaced apart from the main cover plate so that the FRP reinforcing material is positioned in the inner spaced space, or coupled to the main cover plate to be press-fitted into the long groove.

Another object is, (a) forming a long groove along the longitudinal direction of a reinforcing surface that is at least one of the outer surfaces of the installed concrete material or integrally forming the long groove with the concrete material; (b) pre-fabricating an FRP stiffener in the form of a rod capable of being seated in the long groove and corresponding to the length of the long groove; (c) completely finishing the shielding mortar of heat-resistant material on the reinforcing surface so that the FRP reinforcement seated in the long groove is shielded from external heat; And (d) filling a high fire resistance epoxy through the open spaces at both ends of the long groove. It is achieved by a fireproof finish FRP reinforcement method for concrete.

In the step (a), a plurality of short grooves are disposed to face each other along the width direction on both sides of the reinforcing surface, which are spaced apart from each other in the longitudinal direction of at least one of the outer surfaces of the concrete, and the (c) and the Between steps (d), one end is embedded and fixed in the inner side of the end groove by side mortar while the one end is anchored to the inside of the concrete, and the other end passes through the shielding mortar and protrudes to the outside. Installing a reinforcement; And fixing the fireproof board disposed to be in close contact with the front surface of the shielding mortar while being penetrated by the other end of the metal reinforcing material with a nut coupled with a thread formed at the other end of the metal reinforcing material. .

According to the present invention, the FRP reinforcement made in the form of a module for the concrete material in which the long groove in which the FRP reinforcement is located is integrally molded or the long groove is formed by cutting, etc. is firmly fixed by a high fire resistance epoxy that bonds and fixes it in the long groove. Accordingly, the concrete itself can be structurally reinforced.

In addition, the structural stability of concrete is achieved by overlapping thermal barriers to FRP reinforcement and high fire-resistance epoxy through a heat-resistant material shielding mortar that is completely closed on the reinforcing surface including long grooves and a fireproof board that is tightly fixed to the front of the shielding mortar. Even in this high temperature environment, it can be guaranteed to a certain level, and with an optimized structure and a minimized configuration, it is versatility that is easily applied regardless of whether it is newly installed or installed, and external work on concrete without mobilizing large-scale facilities. There is an effect that the workability in which reinforcement and fire-resistance treatment can be easily performed, and thus construction time and cost can be reduced at once.

1 is a perspective view of a fireproof finished FRP reinforced composite concrete according to an embodiment of the present invention.
2 is an exploded perspective view of FIG. 1.
3 is a side view of FIG. 1 and a cross-sectional view taken along lines AA and BB, respectively, showing a modified shielding mortar.
4 is a diagram in which a flowchart and a process chart for manufacturing FIG. 1 are matched, respectively.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in describing the present invention, a description of a function or configuration that is already known will be omitted in order to clarify the gist of the present invention.

1 is a perspective view of a fire-finished FRP-reinforced composite concrete according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of FIG. 1, and FIG. 3 is a cross-sectional view taken along the side of FIG. 1 and cut lines AA and BB, modified It is a diagram showing each of the shielding mortar, and FIG. 4 is a diagram in which a flowchart and a process diagram for manufacturing FIG. 1 are matched.

In the description and claims of the invention, the upper (upper), lower (lower), left and right (lateral or lateral), front (front, front), rear (fold, rear), etc., which refer to directions, etc. For convenience of explanation, it is determined based on the relative position between the drawings and the components, and each direction described below is based on this, except for cases specifically limited differently.

Prior to the description of the present invention, structures such as concrete beams, which are generally used in construction, are manufactured by mixing aggregates with cement paste using a formwork or the like to harden them into a predetermined shape.

However, these concrete structures formed only of aggregate and cement pool have excellent compressive strength and durability, but structural stability by installing a separate reinforcing material inside to structurally compensate or reinforce the disadvantages of weak tensile strength or cracks due to shrinkage. Is aiming at.

The fire-finished FRP-reinforced composite concrete material 100 according to the present invention promotes structural stability with respect to the pre-installed or newly formed concrete material 110, and FRP used as a reinforcing material even in a high-temperature environment and an epoxy fixing it. In addition to minimizing the thermal deformation of (E) through the overlapping shielding structure, the optimized structure and the minimized configuration allow for versatility and quick and easy reinforcement and fireproof treatment with simple external work without excessive labor or large-scale facility mobilization. It is an invention devised to ultimately reduce construction time and cost by making it happen.

In order to specifically implement the functions or actions as described above, the fire-finished FRP-reinforced composite concrete material 100 according to an embodiment of the present invention is, as shown in FIGS. 1 to 3, a concrete material 110 , FRP reinforcement 120, shielding mortar 130, metal reinforcement 140, and may be configured to include a fireproof board 150.

Hereinafter, each of the above-described components will be described in detail.

First, the concrete material 110 is a component that is poured in a predetermined form by mixing aggregate with cement pool to form a building or civil structure, and as shown in the drawing, the upper slab and the beam form for supporting it It may be made of, and although not shown, may be formed in the form of a column supporting between the upper and lower slabs.

In this concrete material 110, a plurality of FRP stiffeners 120 for reinforcing the concrete material 110 in various directions are embedded in the inner side of the concrete material 110, and a long groove 112 and a short groove 114 It may be formed simultaneously with the pouring of the water 110 or through a post-cutting operation.

Here, the long groove 112 is a groove-shaped component formed along the longitudinal direction of one or more reinforcing surfaces 110a, and as shown in FIGS. 2 and 3, a prosthetic concrete material 110 supporting the lower part of the slab In the case of, the lower surface is formed to be elongated along the longitudinal direction with the reinforcing surface 110a.

And the short grooves 114 are spaced apart in the longitudinal direction of one or more reinforcing surfaces 110a and are symmetrical so that a plurality of them face each other in the form of'l' along the width direction on both side surfaces 100b adjacent to the reinforcing surface 110a (or Intersecting) As a constituent element in the shape of a groove that is disposed, as shown in FIGS. 2 and 3, in the case of the prosthetic concrete material 110 supporting the lower part of the slab, it is formed in a'l' shape on both sides adjacent to the lower surface thereof. .

These short grooves 114 are formed for additional reinforcement of the concrete material 110 through a metal reinforcing member 140 to be described later, and when formed in an excessive number, workability, etc. may be significantly deteriorated. It should be formed in an appropriate number in consideration of the degree of reinforcement required according to the installation environment of the water 110 and the weight or size of the fireproof board to be described later.

The long groove 112 and the short groove 114 as described above are less than the volume of the FRP stiffener 120 and the metal stiffener 140 so that the FRP stiffener 120 and the metal stiffener 140 to be described later can be smoothly inserted and buried. It is formed to have a large receiving volume.

The FRP stiffener 120 is a component for supporting and supplementing the flexural load applied to the concrete 110 by being fixed to the inside of the elongated groove 112 described above by epoxy (E) bonding. It is formed by molding plastic-based composite materials (FRP, fiber reinforced plastics) reinforced with glass or carbon fiber, which are high-performance and high-functional materials with excellent corrosion resistance and formability.

This FRP stiffener 120 is molded into a long rod shape, which is a corresponding shape that can be inserted and buried inside the long groove 112 formed on the reinforcing surface (110a) (bottom) of the concrete material (110). By supporting the lower surface of the concrete material 110 is supplemented or reinforced with a bending load applied to the concrete.

The FRP reinforcement material 120 may enhance and specialize the necessary functionality by adjusting the content of the composition or changing additives according to the composition constituting the concrete, landfill conditions or use environment.

On the other hand, the high fire resistance epoxy (E) fixing the FRP reinforcement 120 to the long groove 112 is a component that enables a solid bond between the concrete stone and FRP through the curing process in a viscous liquid state, Various additives may be mixed and used depending on the composition, the conditions of landfilling or the use environment, and the affinity with the used FRP reinforcement 120.

When the bonding by such an epoxy (E) is made, the FRP reinforcement 120 is integrated with the concrete material 110 so that the intended structural stability can be secured. However, since the epoxy (E) has a vulnerability that loses adhesive strength when deformation occurs due to heat, it is necessary to compensate for this.

Therefore, the epoxy (E) according to the embodiment of the present invention does not use a commercial product having a glass transition temperature of approximately 65°C and lacks high-temperature resistance, but a commercial product having a glass transition temperature of 120°C and excellent high-temperature resistance. .

The reason for selecting and using the high fire resistance epoxy (E) specially considering the resistance to heat is, as well as fundamentally preventing or reducing the risk of thermal degeneration of the epoxy (E) itself, as well as shielding mortar 130 and fire board ( It is to ensure the structural stability of the FRP-reinforced concrete material 110 from the heat transmitted from the outside by configuring the overlapping triple heat shield structure together with 150).

The bonding process using this high fire resistance epoxy (E), after placing the FRP reinforcement 120 in the long groove 112, the front finish of the shielding mortar 130 to be described later for the reinforcing surface (110a) including the long groove 112 After this, the epoxy (E) may be injected or filled through the open space at both ends of the long groove 112.

Alternatively, after applying an appropriate amount of high fire resistance epoxy (E) to the long groove 112 of the concrete material 110, the FRP reinforcement 120 is pressed to maintain the correct position in the long groove 112 during the curing time. May be.

The shielding mortar 130 is composed of a heat-resistant material that is completely closed on the reinforcing surface 110a on which the FRP reinforcement 120 is disposed in order to shield the above-described FRP reinforcement 120 and high fire resistance epoxy (E) from external heat. As an element, it may be positioned between the concrete material 110 and the fireproof board 150 to be described later, as shown in FIGS. 2 and 3 on the basis of a base obtained by kneading cement and sand in water.

Such shielding mortar 130, as well as heat resistance, is highly adhesive so that there is no dripping phenomenon even if applied or finished with a predetermined thickness on the lower surface of the concrete 110 as shown, and has rapid setting for rapid construction, It may be a viscous liquid or gel type mortar having properties such as horizontal retention that diffuses in a direction perpendicular to gravity by its own cohesive force and forms a smooth surface.

That is, in the case of the shielding mortar 130, it is preferable to use a mortar to which at least one of high adhesion, rapid setting, and horizontal maintenance is added as heat resistance is an essential property. It can be achieved by variously adjusting the composition content of the mortar, the type or amount of additives, etc. according to the relationship with the concrete material 110 and the surrounding environment of the installed concrete material 110.

Shielding mortar 130 according to an embodiment of the present invention, for heat resistance, at least among clay, silicate, xiaotezil (acidified at higher temperatures), chromium, alumina (neutralized at high temperatures), and chromiummagnesia (basicized at high temperatures). The mortar is composed of any one containing as a heat-resistant material.

At this time, the heat-resistant material described above may also be appropriately selected and combined in consideration of the composition of the concrete material 110 and the surrounding environment in which the concrete material 110 is poured and used.

The metal reinforcing material 140 is a rod provided to support and fix the above-described shielding mortar 130 and the fireproof board 150 to be described later in a close contact, while supporting and supplementing the multidirectional shear load applied to the concrete material 110 As a component of the shape, it may be manufactured using a metal that has undergone corrosion treatment as a material.

This metal reinforcement 140 is a corresponding shape that can be inserted and buried inside the short groove 114 formed along the width direction on both side surfaces 100b adjacent to the reinforcing surface 110a of the concrete material 110 It is manufactured in a shape and arranged on the side of the concrete material 110 to supplement or reinforce the multidirectional shear load applied to the concrete material 110.

Metal stiffener 140 according to an embodiment of the present invention, as shown in Figs. 2 and 3, the inside of the short groove 114 by the filling mortar 132 in a state anchored to the inside of the concrete material 110 It may be composed of one end portion 142 embedded and fixed in, and the other end portion 144 that penetrates the shielding mortar 130 and is protruded and fixed to the outside.

At this time, the metal reinforcement 140, as shown in Figure 3, the one end 142 is inserted into the end groove 114, the slab (or the upper end of the prosthetic concrete) in the state of anchoring or fitting the concrete By being integrated by the water 110 and the filling mortar 132, the support for the concrete material 110 is increased, the fireproof board 150 is firmly fixed, and quick assembly at the construction position can be achieved.

On the other hand, the filling mortar 132 is a component that solidifies the bonding between the concrete material 110 and the metal reinforcement material 140 and shields the external heat transmitted to the side of the concrete material 110, and uses cement and sand. On the basis of the kneaded base, as shown in Figs. 2 and 3, the short groove 114 is filled in and then solidified.

This filling mortar 132, of course, has heat resistance as well as high adhesiveness so that there is no dropping phenomenon even if it is filled in the short groove 114 of the concrete material 110 as shown, and has rapid setting for rapid construction, and has its own cohesiveness. As a result, it may be a liquid or gel-type mortar having a viscosity having properties such as horizontal retention that diffuses in a direction perpendicular to gravity and forms a smooth surface.

That is, even in the case of the filled mortar 132, it is desirable to use a mortar with heat resistance and at least one of high adhesion, rapid setting, and horizontal maintenance. It can be achieved by variously adjusting the composition content of the mortar, the type or amount of additives, etc. according to the relationship between the water 110 and the metal reinforcement 140 and the surrounding environment of the installed concrete material 110.

The refractory board 150 is a plate-shaped component obtained by compressing or solidifying a predetermined refractory material in a flat panel shape in order to block heat transfer, and by the other end 144 of the above-described metal reinforcing material as shown in FIG. It is disposed so as to be in close contact with the entire surface of the shielding mortar 130 in a penetrating state, and may be fixed to the concrete material 110 by a nut 152 that is coupled with a thread formed on the other end 144 of the metal reinforcement.

The fireproof board 150 may be used by selecting a commercial product having an appropriate thickness according to the surrounding environment of the installed concrete material 110 or required heat shielding performance.

On the other hand, according to a modified example of the present invention, in the layer on which the shielding mortar 130 is finished, an elongated refractory member 160 of heat-resistant material fixed to the elongated groove 112 as surrounding the FRP reinforcement 120 is provided with a long groove 112 It can be arranged along the longitudinal direction of.

Here, the elongated fireproof member 160 is a component provided to further shield the FRP reinforcement 120 and the epoxy (E) from external heat along with the shielding mortar 130 and the fireproof board 150 described above, As shown in (a') and (b'), it may have a modular structure including a main shielding plate 162 and a fitting part 164.

At this time, the main shielding plate 162 is a component made of a heat-resistant material that covers and shields the long groove 112 from the outside while part of the long groove 112 is inserted into the long groove 112 so that the long groove 112 is not exposed to the outside. ) In the plate member formed of a length corresponding to (or divided into unit lengths that are easy to handle), a part (162a) that fits snugly into the long groove 112 protrudes so that the cross-sectional shape is'⊥' or'T' as a whole. To form.

Here, the meaning of'fitted tightly' does not mean that the inner space of the long groove 112 and the outer shape of the protruding part (162a) of the main cover plate 162 are completely physically matched, and frictional force is generated at the contact surfaces of both sides. Thus, it is meant to encompass the minimized clearance to the extent that it is not easily removed in a state where no external force is applied, and hereinafter may be understood as the same meaning.

If the main shield plate 162 can be separately manufactured in a modular form for the standardized long groove 112 using a heat-resistant material or a refractory material that can effectively block external heat from being transmitted to the inside of the long groove 112 , The specific composition or detailed shape, etc. are not particularly limited.

However, the main shielding plate 162 according to the modified example of the present invention is at least any of clay, siliceous, xiaotezil (acidified at higher temperatures), chromium, alumina (neutralized at high temperatures), and chromiummagnesia (basicized at high temperatures). The main material including one is manufactured and mass-produced in a modular form by the method of manufacturing refractory bricks or refractory mortar.

The fitting portion 164 is formed protruding from the main shield plate 162 in a state spaced apart from the main shield plate 162 so that the FRP reinforcement 120 is positioned in the inner spaced space, or is coupled to the main shield plate 162 to be press-fitted into the long groove 112 As a rod-shaped component, it may be made of a metal such as reinforcing bar or a heat-resistant synthetic resin.

In order to specifically implement the function or action of the fitting portion 164 as described above, the fitting portion 164 according to a modified example of the present invention includes a pair of rod members disposed to face each other and the length of the main shield plate 162 It may be integrally buried together with the main shield plate 162 in a state disposed at predetermined intervals along the direction.

In this way, the fitting portion 164 formed integrally with the main shield plate 162 is press-fitted into the long groove 112 while supporting the FRP stiffener 120 seated in the spaced space at the correct position, thereby binding force to the long groove 112 Will form.

At this time, the insertion direction end of the arrow-shaped fitting portion 164 is a structure that is fixed to each of the stepped jaws (112a) expanded inside the long groove 112 by the elastic force, even if the high fire resistance epoxy (E) is not applied in advance, the FRP reinforcement 120 can be maintained in a fixed position without being separated from within the long groove 112, and when the application or filling of the high fire-resistant epoxy (E) is made later, it exhibits a more solid and overlapping fixing force.

Next, referring to FIGS. 2 to 4, a method of manufacturing the fire-finished FRP-reinforced composite concrete 100 according to the present invention will be described in detail.

First, step (a) is formed by cutting a long groove 112 along the longitudinal direction of the reinforcing surface 110a, which is one or more of the outer surfaces of the pre-installed concrete material 110 as shown in FIGS. 2 and 4 Or, it is formed by pouring the long groove 112 integrally with the concrete material 110. Here, the long groove 112 may be a groove of a standardized size for reinforcing the bending load in the longitudinal direction of the concrete.

In addition, a plurality of'l'-shaped short grooves 114 are spaced apart in the longitudinal direction of the reinforcing surface 110a, which is one or more of the outer surfaces of the concrete material 110, and along the width direction at both side surfaces 100b adjacent to the reinforcing surface 110a. ) Can be formed to face each other (symmetric or cross). The short groove 114 may be a groove of a standardized size for reinforcing shear loads in multiple directions with respect to the shaped concrete material 110 supporting the lower part of the slab (S100).

Next, step (b) is pre-fabricated with a modularized FRP stiffener 120 in the form of a rod that can be seated in the long groove 112 and corresponds to the length of the long groove 112.

At this time, the FRP reinforcement 120 is made by molding plastic composite materials (FRP, fiber reinforced plastics) reinforced with glass or carbon fiber, which are high-performance and high-functional materials that are excellent in durability, light weight, corrosion resistance and formability against load. It becomes. (S200)

Next, step (c) is made of heat-resistant material on the reinforcing surface (110a) including the long groove 112 after placing the FRP stiffener 120 into the long groove 112 so that the FRP stiffener 120 is shielded from external heat. The front finishing work is performed by applying the shielding mortar 130 to the design thickness through manual operation of the worker or by applying the coating treatment through a spraying device. (S300)

Finally, in step (d), the high fire resistance epoxy (E) is filled through the open space at both ends of the long groove 112 so that the FRP reinforcement 120 is rigidly fixed.

The application timing of the high fire resistance epoxy (E) bonding to the FRP reinforcing material 120 as described above may be made by applying an appropriate amount of epoxy (E) to the long groove 112 in advance before step (c) described above, It is preferable to perform a filling or filling method after step (c) for a clean and accurate epoxy (E) bonding. (S400)

Steps (a) and (b) discussed above are steps that can be performed simultaneously or at different times in separate or integrated workspaces, and since each step is not a step that influences or receives each other, they are listed as described above. It can be performed differently from the stepwise order.

On the other hand, before step (c), the shielding mortar 130 and the fireproof board 150 are supported and fixed in close contact, and the metal reinforcement 140 for supporting and supplementing the multidirectional shear load applied to the concrete material 110 Can be produced in advance. At this time, the metal reinforcement 140 may be formed of a metal that has undergone corrosion treatment as a material, and may be formed in a rod shape, and a pre-fabrication step may be added.

After pre-fabrication of the metal reinforcing material 140 in this way, between steps (c) and (d), one end 142 of the metal reinforcement is anchored to the inside of the concrete material 110, and the other end of the metal reinforcement is After 144 passing through the shielding mortar 130 and protruding outward, a step of firmly fixing the metal reinforcement 140 by filling the inside of the short groove 114 with the side mortar 132 may be added.

And a nut 152 that connects the fireproof board 150 disposed to be in close contact with the front surface of the shielding mortar 130 in a state penetrated by the other end 144 of the metal reinforcing material with a thread formed on the other end 144 of the metal reinforcing material. ) Using the step of fixing to the concrete material 110 may be added in succession.

In the above, although specific embodiments of the present invention have been described and illustrated, the present invention is not limited to the described embodiments, and various modifications and variations can be made without departing from the spirit and scope of the present invention. It is self-evident to those who have. Therefore, such modifications or variations should not be individually understood from the technical spirit or viewpoint of the present invention, and the modified embodiments should be said to belong to the claims of the present invention.

100: FRP reinforced composite concrete with fire-resistant finish
110: concrete 110a: reinforcement surface
110b: proximal surface 112: long groove
112a: step 114: step groove
120: FRP reinforcement E: epoxy
130: shielding mortar 132: filling mortar
140: metal reinforcement 142: one end of the metal reinforcement
144: the other end of the metal reinforcement 150: fireproof board
152: nut 160: long fireproof member
162: stock cover plate 162a: part of stock cover plate
164: fitting

Claims (8)

A concrete material in which a long groove is formed along the longitudinal direction of one or more reinforcing surfaces;
FRP reinforcement which is fixed to the inside of the long groove by high fire resistance epoxy bonding to support and supplement the bending load applied to the concrete material; And
Including a heat-resistant material shielding mortar that is completely closed on the reinforcing surface on which the FRP reinforcement is fixed, so that the FRP reinforcement is shielded from external heat,
The concrete material,
A fire-resistant finished FRP-reinforced composite concrete material, characterized in that it is spaced apart in the longitudinal direction of one or more reinforcing surfaces, and a plurality of short grooves are formed to face each other along the width direction on both sides adjacent to the reinforcing surface. The method of claim 1,
The shielding mortar,
Fire-finished FRP reinforced composite concrete, characterized in that it is a mortar having heat resistance, high adhesion, rapid setting and horizontal retention. delete The method of claim 1,
The composite concrete material,
In order to support and supplement the multidirectional shear load applied to the concrete material,
It characterized in that it comprises a rod-shaped metal reinforcement material which is embedded and fixed to the inside of the short groove by a filling mortar in a state where one end is anchored to the inside of the concrete material, and the other end passes through the shielding mortar and is protruded and fixed to the outside. FRP reinforced composite concrete with a fireproof finish. The method of claim 4,
The composite concrete material,
Fireproof finish, characterized in that it comprises a fireproof board disposed so as to be in close contact with the front surface of the shielding mortar in a state penetrated by the other end of the metal reinforcement and fixed by a nut coupled with a thread formed on the other end of the metal reinforcement. FRP reinforced composite concrete. A concrete material in which a long groove is formed along the longitudinal direction of one or more reinforcing surfaces;
FRP reinforcement which is fixed to the inside of the long groove by high fire resistance epoxy bonding to support and supplement the bending load applied to the concrete material; And
Including a heat-resistant material shielding mortar that is completely closed on the reinforcing surface on which the FRP reinforcement is fixed, so that the FRP reinforcement is shielded from external heat,
In the layer on which the shielding mortar is finished,
As if surrounding the FRP reinforcement, an elongated fire-resistant member of heat-resistant material fixed to the elongated groove is disposed along the longitudinal direction of the elongated groove,
The long fireproof member,
A main shielding plate made of heat-resistant material that covers and shields the long groove while a part of the long groove is inserted into the long groove so that the long groove is not exposed to the outside; And
Fire-resistant finished FRP-reinforced composite concrete, characterized in that it includes a fitting portion that is formed protruding from the main cover plate in a state spaced apart from the main cover plate so that the FRP reinforcement material is located in the inner spaced space, or is press-fitted into the long groove by being coupled to the main cover plate water. (a) forming a long groove along the longitudinal direction of a reinforcing surface that is at least one of the outer surfaces of the installed concrete material or integrally forming the long groove with the concrete material;
(b) pre-fabricating an FRP stiffener in the form of a rod that can be seated in the long groove and corresponds to the length of the long groove;
(c) completely finishing the shielding mortar of heat-resistant material on the reinforcing surface so that the FRP reinforcement seated in the long groove is shielded from external heat; And
(d) filling a high fire resistance epoxy through the open space at both ends of the long groove,
In the step (a), a plurality of short grooves are disposed to face each other along the width direction on both sides of the reinforcing surface, which are at least one of the outer surfaces of the concrete material, and are spaced apart from each other in the longitudinal direction,
Between step (c) and step (d),
Installing a rod-shaped metal reinforcement material with one end anchored to the inside of the concrete material and fixed to the inside of the short groove by side mortar, and the other end passing through the shielding mortar and protruding and fixed to the outside; And
It characterized in that it further comprises the step of fixing the refractory board disposed to be in close contact with the front surface of the shielding mortar while being penetrated by the other end of the metal reinforcing material by a nut coupled with a thread formed on the other end of the metal reinforcing material. Fireproof finishing type FRP reinforcement method for concrete materials.
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