KR20110032921A - High strength reinforced for concrete structure - Google Patents

Abstract

PURPOSE: A high-strength reinforcing material for a concrete structure is provided to enable the damaged part of the concrete structure to be easily repaired. CONSTITUTION: A high-strength reinforcing material(100) for a concrete structure comprises a resin structure(10), and reinforcement(20). The resin structure has a given shape. The reinforcement is a high-strength fiber material and is wound on the surface of the resin structure to increase adhesion.

Description

High strength reinforced for concrete structure

The present invention relates to a reinforcing material applied to concrete structures, and more particularly, tensile strength to replace stirrups or hoops applied to reinforcing bars, steel sections, beams, and column structures by increasing adhesion to concrete. It relates to a high-strength reinforcement for concrete structures that can be produced and spread by rod or plate-shaped high-strength reinforcement superior to 3 to 14 times compared to the steel.

In general, various deterioration phenomena such as peeling / falling / abnormal cracks of reinforced concrete structures and building structures are caused by the compression strength of concrete and the tensile strength of reinforcing steel, resulting in damage and collapse of reinforced concrete and corrosion of steel structures. Safety accidents occur due to damage of the steel structure.

At this time, the concrete deterioration factor / deterioration of the factor as the concrete has a strong alkalinity (PH = 12.5), so the steel corrosion does not proceed.

However, due to the penetration of carbon dioxide gas / acid / chlorine (chlorine ion) into the reinforced concrete structure, alkali aggregate reaction and shrinkage / expansion under the weather conditions, the neutralization of the reinforced concrete proceeds to the corrosion of the steel reinforcing the rust.

In addition, when rust is swept away, the swelling of the steel causes cracks in the concrete structure, peeling / falling of the reinforced concrete structures, and damage to the reinforced concrete due to local exposure of the corroded steel. will be.

In addition, as the structural structures of cement concrete including various civil engineering and construction are neutralized by the infiltration of carbon dioxide gas, the phenomenon of the construction structure weakening due to the cracking of concrete and the corrosion of steel is mixed with cement concrete as well as the penetration of carbon dioxide gas. In the case of losing gravel and sand is volcanic rock, it is known that the neutralization of cement concrete is accelerated.

In repairing and reinforcing damaged parts damaged by deterioration and corrosion of concrete structures such as mortar and concrete structures such as mortar, concrete, etc., repairing or reinforcing underwater concrete structures is generally repaired with mortar and concrete with epoxy resin. Although the reinforcement work is being carried out, even if the deteriorated concrete structure is repaired and reinforced, existing deteriorated damaged parts and repair / reinforcement members cannot be reduced in strength and integrated. There is a problem that is lost.

In addition, as a specific example of the conventional repair / reinforcement composition of deteriorated concrete, FRP repair / reinforcement composition is a laminated molded product of a thermosetting resin for low pressure molding, in which glass fiber is the main reinforcement material. Where it should be avoided, it is suitable for the protection of concrete to prevent the deterioration of the fall prevention of concrete, but there is a problem that the properties of the concrete is different from the concrete and the adhesion is low on the wet surface.

As another example, in the composition of non-shrink grout cross-sectional reinforcement, the most recently used repairing method for walls exposed to rebar due to the lack of concrete coating or peeling / falling of concrete due to deterioration of concrete, and the bonding material is cement-based. Shrinkage does not occur after the use of the material, but it is impossible to work underwater and does not meet the required performance of the reinforcement, and in particular, the compressive strength / flexural strength and adhesive strength, which is the most important component as a reinforcement, cannot be maintained. There is this.

Recently, water repellent coatings for repairing and reinforcing concrete structures such as mortars and concretes such as mortar and concrete, and steel structures such as steel bridges, and metal structures such as metal roofs, transparent gloss finishes, anti-slip repellents, and sealants are cracked. Improves the problems of previous reinforcement construction with repair and waterproofing agent, caulking coating agent, admixture added to give reinforcement and waterproofing property, anti-rust agent and waterproofing agent, coating and adhesion agent, anti-rust anti-rust coating, rust treatment agent, etc. Products are also known.

In addition, the structures for repairing / reinforcing the structural structures and hardware structures of mortar concrete including various conventional civil engineering and construction are paints having a coating property to coat the surface of the structure, or finishing additives and structures added to mortar. In the cement concrete facility structure, the coating formed on the surface delays the penetration of carbon dioxide gas into the atmosphere, thereby slowing down the neutralization rate of the highly alkaline cement, thereby maintaining the strength of the cement concrete structure and corrosion of the reinforcing steel. It is also known to prevent the damage by supplementing the life of the cement concrete structure and also by providing corrosion resistance by the film formed on the surface of the steel structure and metal structure.

In addition, it is known that the effect of delaying neutralization when the deterioration of concrete is accelerated due to the use of gravel and sand of volcanic rock is excellent. However, their composition is expensive and appropriate products are selected according to the deterioration state of the structure to be repaired or reinforced. It was difficult to select and install these products in sequence, which increased the cost of construction and increased the economic burden of air.

In addition, reinforcing bars are used for reinforcing construction concrete structures, tunnel concrete structures, bridge concrete structures, fugae stream concrete structures, port concrete structures, dam concrete structures, etc. The strength is reduced by sweeping, in particular, the reinforcing bars embedded in the invasive paper or underwater concrete structures are rusted and there is a problem such that the cracking shape proceeds quickly to the concrete structure, thereby shortening the life of the concrete structure.

Therefore, when the concrete structure of the exposed / wetland (underwater) is damaged, the carbon fiber and the carbon fiber can be used as a reinforcing member for reinforcement when repairing / reinforcing the damaged part in a simple and easy way or when constructing a new concrete structure. A fiber rod using aramid fibers has been developed.

However, conventional fiber rods are difficult to handle because they are heavy like rebar, and they lose their strength due to rusting during long-term storage.In particular, reinforcing bars embedded in concrete structures constructed in wetlands / water are swelled with rust, causing cracks in concrete structures. While there is an advantage of improving the problems such as weakening the concrete structure and shortening the lifespan, it is made without considering the adhesion with the concrete bar, there is a weak disadvantage that can not be integrated with the concrete when pouring concrete, accordingly Conventionally, there is a disadvantage in that a separate adhesive resin must be applied to the surface of the carbon rod for the purpose of integration with concrete, as well as a gap occurs in the adhesive surface of the concrete and the fiber rod when other adhesive force is lowered in the application of the adhesive resin. Moisture infiltration is facilitated Causing a surface defect as there is a problem that seriously cause the proof stress decreased and the safety of the concrete structure.

Accordingly, the present invention is to improve the conventional problems as described above, the winding strength is formed by winding a high-strength reinforcing fiber wound on the surface of the rod-shaped or plate-shaped resin structure made of a resin material, the tensile strength is 3 ~ 3 ~ By constructing high strength reinforcement with up to 14 times better high strength reinforcement, it can replace the stirrup or hoop applied to reinforcing bars, steel sections, beams and column structures by increasing the adhesive strength with concrete. To provide a high strength reinforcement for concrete structures that can be used as a reinforcement for reinforcing bars when repairing or reinforcing the damaged parts in a simple and easy way when the concrete structure is damaged). There is this.

High-strength reinforcement for concrete structures of the present invention for achieving the above object, a resin structure having a certain shape; Strength reinforcing portion is a high-strength fiber material is wound around the surface of the resin structure to form a bend to increase the adhesive force with the concrete; It is configured to include.

In addition, the resin structure is rod-shaped or plate-shaped.

In addition, the resin structure is any one of an epoxy resin, an acrylic resin, or a plastic resin to bend deformation.

In addition, the wick is impregnated in the resin structure.

In addition, the wick is composed of one or a plurality.

In addition, when the plurality of wicks are configured in a plurality, the plurality of wicks are composed of the same diameter or different diameter so that the high-strength reinforcement has a variety of strength.

Further, the wick is a high strength fiber material.

In addition, the high strength fiber material is any one of carbon fiber, aramid fiber, glass fiber.

On the other hand, high-strength reinforcement for concrete structures, the resin structure having a certain shape; A fine particle layer which is a high-strength fiber material included in the resin structure in a state of being partially exposed to the surface of the resin structure so as to increase adhesion to concrete and reinforce strength of the resin structure; It is configured to include.

In addition, the surface of the resin structure is formed by protruding an integral anchor.

In the present invention, a high strength reinforcing fiber is wound around a rod-shaped or plate-shaped resin structure surface made of a resin material to form a bend, thereby forming a high strength reinforcing material having excellent tensile strength up to 3 to 14 times that of steel (rebar). It consists of a wick where diameter and quantity are selectively applied inside the reinforcement. Through this, various sizes and strengths can be realized without changing the size of the high-strength reinforcement, and the weight of steel (rebar) in the same section is about 1 / It is reduced to about 4 and the strength is 3 to 14 times, and the weight of the reinforcement can be reduced to 1/12 to 1/42 compared to the same strength, which significantly reduces the processing and assembly cost calculated in proportion to the weight of the material through light weight. Reduced construction cost, reduced air, and additional costs in proportion to the weight of material shipment, transportation, and site layout While not reducing steel (rebar), which would be expected to also significantly reduce the effects of carbon dioxide emissions at high temperatures during production.

In addition, the present invention can be placed in the cross section of the concrete structural member small size and a small amount of high-strength reinforcement to improve the quality by placing in a closed room of the concrete, the high-strength fiber particles crushed and mixed in the resin is disposed on the outer surface of the high strength reinforcement In addition to increasing adhesion to concrete, the plate-shaped reinforcement is thinner when applied with the same strength as the existing steel (rebar), so it can be bent by manpower without the help of construction equipment such as bending machines. It can replace stirrups or hoops applied to reinforcing bars, steel sections, beams and column structures, which can prevent the loss of joints and reduce the concrete cover thickness due to the thin thickness.

In addition, the present invention has a characteristic of flame resistance, chemical resistance, moisture resistance, unlike the existing reinforcing steel or steel material, even if the moisture penetrates into the concrete structure as a permanent life, so that the cross section of the structural material of the structure caused by the corrosion of the iron material inside the concrete Improved strength and safety problems due to deficiencies, and reinforcement and steel frame when repairing / reinforcing damaged parts in a simple and easy way when concrete structures in exposed / wetland (underwater) are damaged, or when constructing new concrete structures The effect of using it as a substitute reinforcement can be expected.

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

1 is a perspective view showing a structure of a high strength reinforcement for a concrete structure as a first embodiment of the present invention, Figure 2 is a cross-sectional view showing a structure of a high strength reinforcement for a concrete structure as a first embodiment of the present invention, Figure 3 The first embodiment of the invention shows a cross-sectional view of the state of use of the high strength reinforcement.

1 to 3, the high-strength reinforcement 100 for a concrete structure according to an embodiment of the present invention includes a resin structure 10 and a strength reinforcing portion 20.

The resin structure 10 is made of a rod-shaped by extrusion molding or injection molding of an epoxy resin or an acrylic resin or a plastic resin so as to have a bending deformation while having elasticity.

The strength reinforcing portion 20 is a high-strength fiber material to increase the adhesion to the concrete, that is, to form a bend wound on the surface of the resin structure (10) forming the rod shape, so that the physical properties of the cement mortar is bonded, The high strength fiber material is one of carbon fiber, aramid fiber, glass fiber.

Accordingly, the high-strength reinforcement 100 of the present invention is superior in tensile strength up to 3 to 14 times compared to the conventional reinforcing rod having the same diameter by the complementary relationship between the resin structure 10 and the strength reinforcing portion 20. Of course, there is no physical property deterioration while maintaining 1/10 weight,

When the new concrete structure 300 is to be constructed or repaired / reinforced as shown in FIG. 3, it is possible to construct for existing reinforcing rods, and conventionally used rebars are heavy and difficult to handle and when stored for a long time. The strength of the rust is reduced, and in particular, the reinforcement embedded in the concrete structure 300 constructed in the wetland / water is expanded as the rust is swelled and the concrete structure is weakened due to the cracking phenomenon of the concrete structure 300, shortening the lifespan, etc. Will be solved.

On the other hand, Figures 4 to 6 are attached to the second embodiment of the present invention, which is made of a resin plate (10a) in the form of a thin plate after the cast iron reinforcement (200a) that forms the basis of the circular or square beam or column structure without breaking it It is used as a stirrup and hoop for shear reinforcement and extra reinforcement.

That is, as shown in Figure 5, injection or extrusion molding the resin structure (10a) included in the high-strength reinforcement (100a) forming a thin plate shape to have the shape of the stub for shear reinforcement, or attached to Figure 6 As in the injection or extrusion molded state to have a hoop shape of a predetermined length for extra reinforcement of the cast steel (200a) forming the base of the circular or square beam or column structure, the resin structure (10a) The spirally wound strength reinforcing portion 20a, which is a high-strength fiber material, is formed to bend the surface.

Then, the high-strength reinforcement (100a) produced in the stubble shape can provide shear reinforcement when concrete is made for constructing a circular or square beam or column structure while maintaining a constant gap between the main reinforcement (200) will be.

In addition, the high-strength reinforcement (100a) produced in the shape of the hoop having a predetermined length can reinforce the extra side of the main reinforcement (200) forming the base of the circular beam or column structure while maintaining a constant interval between the main reinforcement (200a). Will be.

That is, when forming the high-strength reinforcement (100a) into a hoop shape having a predetermined length, the high-strength reinforcement (100a) is cast iron (200a) for constructing a circular (or square) beam or column structure as shown in FIG. In order to omit the work of overlapping joints in the outer periphery) can be connected and fixed at one time without breaking the spiral, the main reinforcement (200a) flows while holding the construction position of the high-strength reinforcement (100a) along the spiral trajectory The support protrusion 201 is formed to prevent the fall.

In other words, after the resin structure 10a is manufactured in a thin plate shape having a thin cross section and capable of bending deformation, the strength reinforcing portion 20a, which is a high strength fiber material, is wound around the surface.

Then, since the high-strength reinforcement (100a) forming the plate shape of the thin film is capable of bending deformation, while being supported by the support protrusion 201 at the outer end surface of the cast steel (200a) for constructing a structure such as a beam or column, without being helically broken It can be easily installed, which can omit the work of the overlapping joint that must be performed when the extra reinforcement of the cast steel (200a) for the structure such as the beam or column through the hoop.

In addition, when manufacturing the high-strength reinforcement (100a) as a thin plate-like as described above, it can obtain the effect of reducing the coating thickness of the concrete structure.

That is, the beam or column structure is determined by the coating thickness (thickness up to the structural material closest to the outer surface of the concrete), the outer surface of the beam or column structure to the high-strength reinforcement (100a) of the plate or thin film as described above In the case of reinforcing strength by construction, the coating thickness of the structure is compensated from the plate- or thin-film high-strength reinforcement material 100a having the predetermined thickness, and the coating thickness of the structure may be thinner.

Here, the high-strength reinforcement (100a) can be utilized as a band-shaped hoop as shown in FIG.

Here, in the high-strength reinforcement 100 (100a) according to the first and second embodiments of the present invention, when the strength reinforcing portion 20, 20a is wound spirally on the resin structure (10) (10a), the strength Although not shown in the drawing to form an adhesive force and an extrusion force increase after the spiral winding of the reinforcing parts 20 and 20a are formed, the guide bone is formed in the resin structure 10 and 10a after the spiral guide bone is formed. The spiral reinforcement of the strength reinforcing portion 20 (20a) may be made along this.

On the other hand, Figures 8 and 9 attached as a third embodiment of the present invention is to impregnate the wick 30 of the high-strength fiber material in the resin structure (10 or 10a).

That is, in another embodiment of the present invention, the strength reinforcing portion (20 or 20a) of the high-strength fiber material is wound around the surface of the resin structure (10 or 10a), the inside of the wick 30 made of high-strength fiber material The high-strength reinforcement (100b) is configured, and when applied to a variety of concrete structures, such as concrete tunnels, ceiling concrete structures, wall concrete structures to improve its construction accuracy, as well as to increase the strength of the concrete structure.

In this case, in the third embodiment of the present invention, the impregnation of one wick 30 in the resin structure 10 or 10a in the structure of the high-strength reinforcement 100b has been described, but as shown in FIG. The wick 30 may be impregnated with one or more to further reinforce the strength, and in particular, it is most preferable to impregnate the three wicks 30, but it is not necessarily limited to this number, but the change in the wick thickness, that is, the wick If the thickness is thin, the number may increase, but if the wick is thick, the number may be reduced.

That is, according to the third embodiment of the present invention, the strength of the high-strength reinforcement 100b having the same specification may be variously set by the diameter and quantity of the wick 30 which is the high-strength fiber material.

In other words, when the wick 30 is configured in plural, the plurality of wicks 30 may be of the same diameter or different diameters so that the high strength reinforcement 100b has various strengths.

On the other hand, Figures 11 to 13 attached as a fourth embodiment of the present invention for the high strength reinforcement (100c), the high strength reinforcement (100c) is of course to increase the adhesive strength with concrete to the resin structure (10b) having a predetermined shape On the surface of which the fine particle layer 210b is partially exposed, the fine particle layer 20b is composed of a high-strength fibrous material that is partially exposed to the surface so that the surface of the resin structure 10b is reinforced. The anchor portion 40 protrudes at a predetermined interval, and one or a plurality of wicks 30 are formed therein.

That is, the microparticle layer 20b and the wick 30 as well as the anchor portion 40 are integrated when injection or extrusion molding of the resin structure 10b is performed.

Accordingly, when constructing the high strength reinforcing material (100c), the resin structure (10c) is reinforced by the fine particle layer 20b, as well as the fine particle layer (20b) partially exposed to the surface of the resin structure (10c). By the concrete when the concrete when the adhesion to the concrete is increased, and the anchor portion 40 is to increase the binding force between the high-strength reinforcement (100c) and the concrete structure while acting when the curing is made after the concrete is placed. .

Here, the wick 30 is the same structure as in the third embodiment of the present invention and the description thereof overlaps, and accordingly the same reference numerals as in the third embodiment are omitted and the description thereof is omitted.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. It is to be understood that such changes and modifications are within the scope of the claims.

1 is a perspective view showing a structure of a high-strength reinforcement forming a rod in the first embodiment of the present invention.

Figure 2 is a cross-sectional view showing the structure of a high-strength reinforcing rod forming a rod shape in a first embodiment of the present invention.

Figure 3 is a cross-sectional view of the use state of the high-strength reinforcing rod forming a rod shape in a first embodiment of the present invention.

Figure 4 is a perspective view showing the structure of a high-strength reinforcement forming a plate-like structure of a thin film as a second embodiment of the present invention.

FIG. 5 is a state diagram in which a high-strength reinforcing member constituting a thin plate-like structure is manufactured and constructed in a stirrup shape according to a second embodiment of the present invention. FIG.

6 is a state in which the high-strength reinforcement forming the plate-like structure of the thin film as a hoop shape in a second embodiment of the present invention continuously constructed in a spiral shape.

7 is a state in which a high-strength reinforcing material forming a plate-like structure of a thin film in a second embodiment of the present invention is manufactured in a band-shaped hoop shape and constructed.

8 is a longitudinal sectional view of a state in which a single wick is impregnated in the resin structure according to the third embodiment of the present invention.

9 is a cross-sectional view of a state in which one wick is impregnated in the resin structure according to the third embodiment of the present invention.

10 is a cross-sectional view of a state in which a plurality of wicks are impregnated in the resin structure according to the third embodiment of the present invention.

Figure 11 is a longitudinal sectional view showing a structure of a high strength reinforcement of a fourth embodiment of the present invention.

12 is a cross-sectional view of a state in which a single wick is impregnated in the resin structure according to the fourth embodiment of the present invention.

Fig. 13 is a cross-sectional view of a state in which a plurality of wicks are impregnated in the resin structure according to the fourth embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10,10a, 10b; Resin structure 20,20a; Strength reinforcement part

20b; Microparticle layer 30; Wick

100,100a, 100b, 100c; High strength reinforcement 200,200a; Cast iron

201; Support protrusion

Claims (11)

Resin structure having a certain shape; Strength reinforcing portion is a high-strength fiber material is wound around the surface of the resin structure to form a bend to increase the adhesive force with the concrete; High strength reinforcement for concrete structures, characterized in that comprising a. Resin structure having a certain shape; A fine particle layer which is a high-strength fiber material included in the resin structure in a state of being partially exposed to the surface of the resin structure so as to increase adhesion to concrete and reinforce strength of the resin structure; High strength reinforcement for concrete structures, characterized in that comprising a. The high-strength reinforcement for concrete structures according to claim 1 or 2, wherein the resin structure is formed by molding any one of an epoxy resin, an acrylic resin, or a plastic resin so as to bend and deform. The high-strength reinforcement for concrete structures according to claim 1 or 2, wherein the resin structure comprises a rod shape or a thin plate shape. The high-strength reinforcement for concrete structures according to claim 1 or 2, wherein the resin structure is impregnated with a wick. The high-strength reinforcement for concrete structures according to claim 1, wherein the resin structure forms a spiral guide bone for guiding the spiral winding of the strength reinforcing portion. 6. The high strength reinforcement for concrete structures according to claim 5, wherein the wick is one. The high strength reinforcement for concrete structures according to claim 5, wherein the plurality of wicks are configured in plural, and the plurality of wicks have the same diameter or different diameters so that the high strength reinforcing members have various strengths. The high strength reinforcing material for a concrete structure according to claim 1 or 2, wherein the high strength fiber material is any one of carbon fiber, aramid fiber and glass fiber. The high strength reinforcing material for concrete structure according to claim 5, wherein the wick is made of a high strength fiber material, and the high strength fiber material is any one of carbon fiber, aramid fiber, and glass fiber. The high-strength reinforcement for concrete structures according to claim 2, wherein an integral anchor portion protrudes from the surface of the resin structure.

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