KR100973570B1 - Reinforcement method of concrete using carbon rod and punching holed steel-plate - Google Patents

Abstract

PURPOSE: A concrete reinforcement method using a punched steel plate and a carbon bar is provided to facilitate construction as concrete surface is welded and integrated with a carbon bar. CONSTITUTION: A concrete reinforcement method using a punched steel plate and a carbon bar comprises following steps. Both ends of a punched steel plate(50) are bent. The bent punched steel plate is surrounded by a carbon bar(40) so as to form a reinforcing material(70). An insertion hole(20) is formed by crashing concrete surface(10). Epoxy resin paste(30) is applied on the concrete surface contacted with the inlet and the punched steel plate.

Description

Reinforcement method of concrete using carbon rod and punching holed steel-plate}

The present invention relates to a concrete reinforcing method using a perforated iron plate and a carbon bar (bar), more preferably sagging or bending or shearing due to aging of concrete, which is a structure of civil engineering and construction, and deterioration of the structure, and extension of the life of the structure, and its strength When it is necessary to increase the load carrying capacity of the concrete structure due to factors such as load increase, after bending both sides of the perforated steel plate used as a reinforcing material, crushing the deteriorated concrete to a depth sufficient to insert a wrapped carbon bar (bar) and forming an insertion hole, After the epoxy resin adhesive is applied to the concrete surface where the insertion hole and the perforated iron plate come into contact with the concrete, the surface of the perforated iron plate is protected with a corrosion prevention sheet to protect the surface of the perforated iron plate. , It is intended to fundamentally block elements such as exhaust gas, acid, and alkali.

In general, concrete structures have been known as semi-permanent materials, but the life of concrete is due to factors such as freeze-thawing, chemical erosion, exhaust gases from automobiles and industrialization, carbonation, salt penetration, structural cracking due to subsidence, earthquakes, and fires. This is being shortened, and concrete cannot be permanently used without constant maintenance.

In addition, the structural members that form the frame of the structure due to various complex reasons such as excessive loads of the load due to long-term use, uneven settlement due to unbalance of the ground, and aging of the concrete itself, are exacerbated by fatigue. When the limit is reached, there is a risk of sudden destruction, etc., resulting in a large accident.

Therefore, in order to repair and strengthen the concrete, a concrete deterioration part is dispatched and repaired by performing a cross-section repair using a mortar for cross-section repair, or repaired by using an epoxy resin, or by attaching a steel plate and a fiber sheet with an epoxy resin adhesive. The method of reinforcing the concrete structure is used.

The above technology has already been described as a method of repairing and reinforcing existing construction and civil structures using carbon rods of Korean Patent Publication No. 10-2001-0088712. "Cutting deteriorated concrete to form a buried groove, and applying a primer and an epoxy adhesive to the buried groove." Thereafter, a configuration in which a carbon rod was adhered to an epoxy adhesive and then a filler was filled" was disclosed.

However, the above technology has a problem that the construction cost is high because the surface area of the reinforcing material is small and the part capable of reinforcing deteriorated concrete is not wide.

The present invention was created to solve the above problems, and in the method of repairing and reinforcing a concrete structure, the carbon bar (bar) used as a reinforcing material easily transmits excellent tensile and elastic forces to the concrete structure, thereby increasing bending strength or improving load resistance. In addition, the perforated iron plate in the form of integrally combining carbon rods improves the adhesion to the concrete structure and shows stable attachment characteristics in the early and long term, and as the perforated iron plate portion is attached to the concrete surface, the concrete becomes a fire heat during fire. It aims to be able to block the explosive brittle destruction.

In order to achieve the above object, the present invention is integrally wrapped around a carbon bar (bar) 40 by bending both ends of a plurality of perforated perforated plates 50 with a regular interval of 5 mm to 20 mm in diameter from 1 mm to 3 mm thick. A process of forming the reinforcing material 70,
The process of forming the insertion port 20 by crushing the surface of the deteriorated concrete 10 to a depth capable of inserting a carbon bar (bar) 40 wrapped with the perforated iron plate 50,
A process of applying an epoxy resin adhesive 30 to the surface of the concrete (10) in contact with the insertion hole 20 and the perforated iron plate 50,
A process of inserting a carbon rod (bar) 40 wrapped with a perforated iron plate 50 into the insertion port 20 to closely bond the perforated iron plate 50 to the deteriorated concrete 10 surface, and joining it;
Provides a method for reinforcing concrete using a perforated iron plate and a carbon rod, comprising a process for reinforcing deteriorated concrete by adhering a corrosion prevention sheet (60) to protect the surface of the perforated iron plate (50).

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The method of repairing and reinforcing the deteriorated concrete as described above is different from the method of attaching and reinforcing a reinforcing material using an existing carbon bar or carbon bar using an epoxy adhesive, and bending the both sides of a perforated steel plate to use a wrapped carbon bar (bar) to wrap the epoxy resin adhesive. It has the advantage of improving the workability by bonding and constructing in close contact with the deteriorated concrete surface.

In addition, the present invention consists of a perforated iron plate wrapped around a carbon bar (bar), so that the adhesive surface of the concrete is widened and exhibits stable adhesion characteristics, so that the perforated iron plate and the carbon bar (bar) can effectively adhere to the concrete, so it is integrated with concrete. Because it is made, it is possible to create a structural form that can effectively transfer the high elasticity and high rigidity properties of the carbon bar (bar) to the concrete structure.

In addition, the anti-corrosion sheet used as the final finishing material after the restoration of the section is a special sheet made of a metal mixture, which has the effect of maximizing the effect of blocking harmful factors and greatly extending the durability life of the concrete structure.

In addition, the reinforcing material of carbon rods or carbon bars made of carbon materials is more than 10 times more elastic than rebar and has a long lifespan because there is no change in physical properties. It is a material that is effectively used to reinforce the bending strength of concrete structures. It has been proven and widely used, and its weight is also light, making it an excellent material for construction.

1 is a perspective view showing a carbon bar (bar) wrapped by bending both sides of a perforated steel plate according to the present invention,
Figure 2 is a perspective view showing a state of constructing a perforated iron plate according to the present invention on deteriorated concrete.

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

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The process for reinforcing the deteriorated concrete with the reinforcing material of the present invention will be described in more detail as follows.

The present invention is to purchase a carbon rod (bar) 40 wrapped with a perforated iron plate 50 at both ends of the reinforcement 70 by drilling a surface of the concrete 10 deteriorated due to the aging of the concrete or corrosion due to acid or the like. The insertion hole 20 is formed as much as possible. At this time, the reinforcing material 70 is formed of a perforated iron plate 50 and a carbon bar (bar) 40, and the carbon bar (bar) 40 is formed integrally by bending and wrapping both ends of the perforated iron plate 50. . Therefore, the insertion port 20 may be a depth sufficient to allow the carbon rods (bars) 40 surrounding the perforated iron plate 50 to be purchased.
At this time, the diameter of the perforation 51 formed in the perforated iron plate 50 is configured to be regularly arranged by being punched from 5 mm to 20 mm, and the perforated iron plate 50 is made of metal having a thickness of about 1 mm to 3 mm. desirable.

If the diameter of the perforated iron plate 50 is 5 mm or less, the adhesive surface between the concrete 10 and the perforated iron plate 50 does not effectively increase, and the adhesion to the structure may be weakened. When the diameter is 20 mm or more, the perforated iron plate 50 ) Has insufficient elasticity, tensile strength, and load-bearing ability to handle brittle fracture. In addition, when the thickness of the perforated iron plate 50 is 1 mm or less, the perforated iron plate 50 does not sufficiently exhibit the properties of the reinforcing material 70, so the reinforcing effect is reduced. When the thickness is 3 mm or more, the performance as the reinforcing material 70 becomes excessive. It becomes heavy and construction is not easy.

In addition, to remove foreign substances attached to the surface of the concrete 10 in contact with the insertion hole 20 and the perforated iron plate 50, it is washed with high pressure water. Epoxy resin adhesive (30) is applied in close contact to the washed concrete (10) surface and the insertion port (20). The epoxy resin adhesive 30 is coated with a perforated iron plate 50 into the insertion port 20 coated with carbon rods (bars) 40 wrapped at both ends, and at the same time, the perforated iron plate 50 is also concrete 10 surface It is integrally attached to the.
Finally, in order to protect the perforated iron plate 50, the perforated iron plate 50 is closed with an anti-corrosion sheet 60. The anti-corrosion sheet 60 prevents the perforated iron plate 50 from being corroded.
The anti-corrosion sheet 60 uses the technology of Patent No. 10-0245851 already registered by the applicant. The composition is one of a room temperature curing type urethane resin, an epoxy resin for curing at room temperature, a thermosetting urethane resin, a thermosetting epoxy resin, and an aluminum oxide adhesive coating suitable for the steel pipe and reinforcing bar on the outer surfaces of the steel pipe and reinforcing bar. After applying one or more selected paints, a large amount of salt-free sand is sprayed or applied to the outer surface before curing.

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Hereinafter, an example for reinforcing deteriorated concrete with the present invention will be described.

As shown in the perspective view showing the construction state of Figure 2, the deterioration of the concrete (10), surface deterioration, construction with insufficient load capacity, to repair and reinforce civil concrete, the deteriorated concrete (10) surface is crushed with a drill to insert 20). At this time, the insertion port 20 is crushed to the depth to be able to insert and fix the carbon rods (bars) 40 wrapped by bending both ends of the perforated iron plate 50, which is a reinforcing material 70 for reinforcing deteriorated concrete. At this time, to match the width of the carbon rod (bar) 40 wrapped with the perforated iron plate 50 in the deteriorated concrete 10 so as to buy the carbon rod (bar) 40 formed by wrapping both ends of the perforated iron plate 50 The insert 20 is crushed with a drill and washed with high-pressure water to remove foreign matter, such as lattice and dust.

Then, the insert 20 of the deteriorated concrete 10 is coated with an epoxy resin adhesive 30 to integrate with the concrete 10 by inserting carbon rods (bars) 40 formed on both sides of the perforated iron plate 50, In addition, an epoxy resin is also applied to the surface of the concrete 10 in contact with the perforated iron plate 50 to bond the perforated iron plate 50 in close contact.

In order to reinforce the deteriorated concrete (10) on the coated epoxy resin adhesive (30), at both ends of the perforated iron plate (50) by bending and enclosing the carbon rods (bars) 40, which are wrapped around the insert 20, The perforated iron plate 50 is integrally bonded to the concrete 10 surface in close contact. The carbon bar (bar) 40 for reinforcing the concrete 10 is a new material that is effectively used for reinforcing the flexural strength of a concrete structure with excellent tensile strength and easy to construct because of its elasticity is more than 10 times that of reinforcing bars and light weight.

As described above, the carbon rods (bars) 40 surrounding the perforated iron plate 50 primarily serve to reinforce bending stress and strength in the concrete structure, and secondly, the perforated iron plate 50 prevents brittle fracture of the concrete structure. It is used as a reinforcing material that increases the stability of the structure because it helps to prevent and reinforces the perforated steel plate 50 in the form of being buried. do.

Then, in order to protect the perforated iron plate 50 from being corroded, a corrosion prevention sheet 60 is applied over the perforated iron plate 50.

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10. Concrete 20. Insert
30. Epoxy resin adhesive 40. Carbon rod (bar)
50. Perforated steel sheet 60. Corrosion prevention sheet
70. Reinforcement

Claims (5)

delete A process of forming a reinforcement 70 integrally by bending both ends of a plurality of perforated perforated steel plates 50 at regular intervals with a diameter of 5 mm to 20 mm in a thickness of 1 mm to 3 mm, and surrounding the carbon rods (bars) 40,
The process of forming the insertion port 20 by crushing the surface of the deteriorated concrete 10 to a depth capable of inserting a carbon bar (bar) 40 wrapped with the perforated iron plate 50,
A process of applying an epoxy resin adhesive 30 to the surface of the concrete (10) in contact with the insertion hole 20 and the perforated iron plate 50,
A process of inserting a carbon rod (bar) 40 wrapped with a perforated iron plate 50 into the insertion port 20 to closely bond the perforated iron plate 50 to the deteriorated concrete 10 surface, and joining it;
A method of reinforcing concrete using a perforated iron plate and a carbon rod, comprising a process for reinforcing deteriorated concrete by adhering a corrosion prevention sheet (60) to protect the surface of the perforated iron plate (50).
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