Carbon fiber textile reinforcing member with anodic metal line and method of repairing and reinforcing concrete structure using the same

Abstract

Provided are a carbon fiber textile reinforcing material with an anode metal line which can be repaired and reinforced with a high stiffness and non-corrosive carbon fiber textile by disposing a carbon fiber textile reinforcing material with an anodic metal line functioning as a conductor and a reinforcing material on a deteriorated cross-section of concrete, can maximize repair and reinforcement of a reinforced concrete structure by preventing additional corrosion of a concrete embedded reinforcing bar using a sacrificial anode arranged on the carbon fiber textile, can prevent corrosion of an existing reinforced concrete structure and can be used as a reinforcing material and a corrosion preventing material of a new concrete structure, and a method for repairing and reinforcing a reinforced concrete structure using the same.

Claims

1. A carbon fiber textile reinforcing material with an anodic metal line, the carbon fiber textile reinforcing material comprising: concrete embedded reinforcing bars embedded in a reinforced concrete structure in transverse and longitudinal directions respectively, and in which corrosion is caused; a carbon fiber textile disposed in a lattice shape and configured to function as a conductor; an anode metal line made of a metal with a natural electrode potential lower than that of the concrete embedded reinforcing bars and uniaxially or polyaxially disposed on the carbon fiber textile so that a positive potential is applied to the anode metal line; and a first connection wire configured to electrically connect the carbon fiber textile to one side of each of the concrete embedded reinforcing bars, wherein the carbon fiber textile is configured to be connected to the concrete embedded reinforcing bars to apply the positive potential applied through the anodic metal line to the concrete embedded reinforcing bars to prevent the corrosion of the concrete embedded reinforcing bars, and to reinforce a corresponding cross-section of a deteriorated concrete part of the reinforced concrete structure.

2. The carbon fiber textile reinforcing material of claim 1, wherein the carbon fiber textile is made of a non-corrosive carbon fiber and is configured to simultaneously function as a conductor supplying a current to perform electrolyte protection of the concrete embedded reinforcing bars and as a reinforcing material reinforcing the corresponding cross-section of the deteriorated concrete part.

3. The carbon fiber textile reinforcing material of claim 2, wherein the anodic metal line is not directly connected to the concrete embedded reinforcing bars by a wire and is connected thereto through the carbon fiber textile functioning as a conductor.

4. The carbon fiber textile reinforcing material of claim 1, wherein the corrosion of the concrete embedded reinforcing bars is prevented through a sacrificial anode method, and the anodic metal line is configured to function as an anode of the sacrificial anode method.

5. The carbon fiber textile reinforcing material of claim 4, wherein the anodic metal line is manganese (Mn), aluminum (Al), or zinc (Zn) with a natural electrode potential lower than that of the concrete embedded reinforcing bars.

6. The carbon fiber textile reinforcing material of claim 1, further comprising a second connection wire electrically connected to the other side of each of the concrete embedded reinforcing bars, wherein the second connection wire is withdrawn to the outside through an electrolytic protection terminal box and external power is applied thereto to perform electrolytic protection through an impressed current cathodic protection method, and the corrosion of the concrete embedded reinforcing bars is prevented through a sacrificial anode method first, and the external power is supplied to the electrolytic protection terminal box to perform electrolytic protection when the anode is completely consumed.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The above and other objects, features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing exemplary embodiments thereof in detail with reference to the accompanying drawings, in which:

(2) FIGS. 1A and 1B are views showing a corroded concrete embedded reinforcing bar of a reinforced concrete structure according to a related art;

(3) FIG. 2 is a view showing a carbon fiber textile reinforcing material with an anodic metal line according to one embodiment of the present invention;

(4) FIGS. 3A to 3C are views showing a carbon fiber textile with an anodic metal line according to one embodiment of the present invention;

(5) FIG. 4 is a flowchart of a method of reinforcing and repairing a reinforced concrete structure using a carbon fiber textile reinforcing material with an anodic metal line according to one embodiment of the present invention;

(6) FIGS. 5A to 5G are views for specifically describing processes of preventing corrosion of a reinforced concrete structure using the carbon fiber textile reinforcing material with an anodic metal line according to one embodiment of the present invention; and

(7) FIGS. 6A and 6B are photographs showing a reinforced concrete structure processed by a method of repairing and reinforcing a reinforced concrete structure using the carbon fiber textile reinforcing material with an anodic metal line according to one embodiment of the present invention.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

(8) Hereinafter, embodiments that are easily performed by those skilled in the art will be described in detail with reference to the accompanying drawings. However, embodiments of the present invention may be implemented in several different forms, and are not limited to embodiments described herein. In addition, parts irrelevant to description will be omitted in the drawings to clearly explain embodiments of the present invention. Similar parts are denoted by similar reference numerals throughout this specification.

(9) Throughout the specification, when a portion includes an element, the portion may include the element and another element may be further included therein, unless otherwise described.

(10) [Carbon Fiber Textile Reinforcing Material with Anodic Metal Line]

(11) FIG. 2 is a view showing a carbon fiber textile reinforcing material with an anodic metal line according to one embodiment of the present invention, and FIGS. 3A-3C are views showing a carbon fiber textile with an anodic metal line according to one embodiment of the present invention.

(12) Referring to FIG. 2, a carbon fiber textile reinforcing material with an anodic metal line according to one embodiment of the present invention includes concrete embedded reinforcing bars 120a and 120b, a carbon fiber textile 140, an anodic metal line 150, a first connection wire 160a, a second connection wire 160b, an electrolytic protection terminal box 170, and a repair concrete or mortar 180.

(13) Each of the concrete embedded reinforcing bars 120a and 120b is embedded and arranged in a reinforced concrete structure 110 in a transverse direction and a longitudinal direction, and corrosion is caused. In this case, the concrete embedded reinforcing bars 120a and 120b may be a corroded longitudinal reinforcing bar 120a or a corroded transverse reinforcing bar 120b.

(14) The carbon fiber textile 140 is made of a typically produced roving cross or is specially manufactured with a designed thickness and lattice distance of carbon fiber for its intended purpose, and the carbon fiber textile 140 is arranged in a lattice shape to reinforce a deteriorated cross-section of a deteriorated concrete part 130 of the reinforced concrete structure 110 and functions as a conductor. In this case, the carbon fiber textile 140 is connected to the concrete embedded reinforcing bars 120a and 120b to apply a positive potential applied through the anodic metal line 150 to the concrete embedded reinforcing bars 120a and 120b, and thus corrosion of the concrete embedded reinforcing bars 120a and 120b is prevented.

(15) The anodic metal line 150 is made of a metal with a natural electrode potential lower than that of the concrete embedded reinforcing bars 120a and 120b and is polyaxially or uniaxially arranged on the carbon fiber textile 140, and a positive potential is applied to the anodic metal line 150. That is, the anodic metal line 150 is made of a metal with a natural electrode potential lower than that of the concrete embedded reinforcing bars 120a and 120b, such as Mg, Al, Zn, and the like, and is arranged on the carbon fiber textile 140, the carbon fiber textile 140 is directly connected to the concrete embedded reinforcing bars 120a and 120b or connected to the concrete embedded reinforcing bars 120a and 120b by a first connection wire 160a, and cement concrete or mortar 180 is poured, and thus corrosion of the concrete embedded reinforcing bars 120a and 120b can be fundamentally prevented. In this case, a thickness or the number of the anodic metal lines 150 is determined depending on a corrosion environment and corrosion prevention period of the target reinforced concrete structure 110.

(16) Particularly, in the carbon fiber textile 140, as shown in FIG. 3A, a plurality of longitudinal carbon fibers 141 and transverse carbon fibers 142 are arranged in a lattice shape, the anodic metal line 150 shown in FIG. 3B is polyaxially or uniaxially arranged thereon, and the carbon fiber textile reinforcing material is formed, as shown in FIG. 3C.

(17) The first connection wire 160a electrically connects the carbon fiber textile 140 to one side of each of the concrete embedded reinforcing bars 120a and 120b, and the second connection wire 160b is electrically connected with the other side of each of the concrete embedded reinforcing bars 120a and 120b and is exposed to the outside to be connected to the electrolytic protection terminal box 170.

(18) The electrolytic protection terminal box 170 is installed outside the reinforced concrete structure 110 and is connected to a wire withdrawn from the second connection wire 160b to perform electrolytic protection of the concrete embedded reinforcing bars 120a and 120b.

(19) The concrete or mortar 180 is poured to the deteriorated concrete part 130 to embed the deteriorated concrete part 130 after the installation of the carbon fiber textile 140, the first connection wire 160a, and second connection wire 160b.

(20) The carbon fiber textile reinforcing material with the anodic metal line of the present invention, as shown in FIG. 2, includes the carbon fiber textile 140 made with the longitudinal carbon fiber 141 and the transverse carbon fiber 142 disposed in a lattice shape and the anodic metal line 150 polyaxially or uniaxially disposed on the carbon fiber textile 140.

(21) In this case, a cross-section of the deteriorated concrete part 130 is removed, the corroded concrete embedded reinforcing bars 120a and 120b are exposed, corrosion-proofing is performed thereon, and then the carbon fiber textile reinforcing material with an anodic metal line of the present invention is disposed at a cross-section of the deteriorated concrete part 130 to be repaired to reinforce cross-sectional damage of a reinforcing bar caused due to the corrosion of the concrete embedded reinforcing bars 120a and 120b, as shown in FIGS. 3A-3C. In this case, the concrete embedded reinforcing bars 120a and 120b are connected with the carbon fiber textile 140 by the first connection wire 160a, and the cross-section is repaired by the concrete or mortar 180 to complete the repair.

(22) In the carbon fiber textile reinforcing material with the anodic metal line according to one embodiment of the present invention, the anodic metal line 150 is polyaxially or uniaxially disposed, and the carbon fiber textile 140, which is a reinforcing material, is installed at a corresponding cross-section of the deteriorated concrete part 130 of the reinforced concrete structure 110, and thus, installation of an anode is completed. In this case, the carbon fiber textile 140 functions as a conductor, and thus it is not necessary for the anodic metal line 150 to be directly connected to the concrete embedded reinforcing bars 120a and 120b by a wire and the corrosion is prevented without installation of a lot of anodes.

(23) In the carbon fiber textile reinforcing material with an anodic metal line according to one embodiment of the present invention, the first connection wire 160a directly connects the carbon fiber textile 140 with the concrete embedded reinforcing bars 120a and 120b, and thus corrosion is prevented via a sacrificial anode method by the anodic metal line 150 being used as a sacrificial anode and being provided in the carbon fiber textile 140. The second connection wire 160b is withdrawn from the carbon fiber textile 140 to the electrolytic protection terminal box 170 at the outside, and external power is supplied to perform corrosion prevention when the anodic metal line 150 used as the sacrificial anode is completely consumed.

(24) Therefore, the carbon fiber textile reinforcing material with an anodic metal line functioning as a conductor and a reinforcing material according to one embodiment of the present invention is disposed at a cross-section of the deteriorated concrete, and thus repair and reinforcement are performed by a high strength and non-corrosive carbon fiber textile. Additional corrosion of the concrete embedded reinforcing bar is prevented by the sacrificial anode arranged in the carbon fiber textile, and the repair and reinforcement of the reinforced concrete structure is maximized. Further, the carbon fiber textile reinforcing material with an anodic metal line can prevent corrosion of an existing reinforced concrete structure and can also be used as a reinforcing bar and corrosion preventing material of a new concrete building.

(25) [Method of Repairing and Reinforcing a Reinforced Concrete Structure Using a Carbon Fiber Textile Reinforcing Material with an Anodic Metal Line]

(26) FIG. 4 is a flowchart of a method of reinforcing and repairing a reinforced concrete structure using a carbon fiber textile reinforcing material with an anodic metal line according to one embodiment of the present invention, and FIGS. 5A to 5G are views for specifically describing processes of preventing corrosion of a reinforced concrete structure using the carbon fiber textile reinforcing material with an anodic metal line according to one embodiment of the present invention

(27) Referring to FIG. 4 and FIGS. 5A to 5G, the method of repairing and reinforcing a reinforced concrete structure using a carbon fiber textile reinforcing material with an anodic metal line according to one embodiment of the present invention includes, as shown in FIG. 5A, selecting a deteriorated concrete part 130 of a reinforced concrete structure 110 (S110). In this case, site research on the reinforced concrete structure 110 to be repaired and reinforced is performed, and thus a portion at which concrete is delaminated or detached is determined.

(28) As shown in FIG. 5B, concrete of the deteriorated concrete part 130 is removed to expose concrete embedded reinforcing bars 120a and 120b, which are corroded reinforcing bars embedded in the reinforced concrete structure 110 (S120). In this case, concrete of the deteriorated concrete part 130 to be delaminated due to deterioration or detached due to severe cracking around a portion at which the reinforced concrete structure 110 is detached is removed, a corroded portion of the concrete embedded reinforcing bars 120a and 120b exposed from the deteriorated concrete part 130 is preferably removed by sandpaper, a brush, and the like, and the concrete embedded reinforcing bars 120a and 120b from which the corroded portion is removed are washed with water, dried, and a rust inhibitor is applied thereto when necessary.

(29) As shown in FIG. 5C, first and second connection wires 160a and 160b each connected to the exposed concrete embedded reinforcing bars 120a and 120b are installed (S130).

(30) As shown in FIG. 5D, an anodic metal line 150 for applying a positive potential is polyaxially or uniaxially disposed on a latticed carbon fiber textile 140 (S140).

(31) As shown in FIG. 5E, electrolytic protection is performed through a sacrificial anode method by electrically connecting the carbon fiber textile 140 on which the anodic metal line 150 is disposed to the concrete embedded reinforcing bars 120a and 120b through the first connection wire 160a (S150). In this case, electrolytic protection is performed on the concrete embedded reinforcing bars 120a and 120b through the sacrificial anode method, and the anodic metal line 150 function as an anode of the sacrificial anode method. The anodic metal line 150 may be manganese (Mg), aluminum (Al), or zinc (Zn) with a natural electrode potential lower than that of the concrete embedded reinforcing bars 120a and 120b. Further, the anodic metal line 150 and the concrete embedded reinforcing bars 120a and 120b are not directly connected by a wire but are connected through the carbon fiber textile 140 functioning as a conductor.

(32) As shown in FIG. 5F, the second connection wire 160b is withdrawn to a electrolytic protection terminal box 170, and cement concrete or mortar 180 is poured on the deteriorated concrete part 130 (S160).

(33) As shown in FIG. 5G, a surface of the deteriorated concrete part 130 is finished, and electrolytic protection is performed through impressed current cathodic protection with respect to the concrete embedded reinforcing bars 120a and 120b through the electrolytic protection terminal box 170 (S170). Therefore, electrolytic protection is performed on the concrete embedded reinforcing bars 120a and 120b through the sacrificial anode method first, and external power is supplied to the electrolytic protection terminal box 170 when the sacrificial anode is completely consumed to preform corrosion prevention.

(34) Therefore, the carbon fiber textile 140 is connected to the concrete embedded reinforcing bars 120a and 120b to apply a positive potential applied through the anodic metal line 150 to the concrete embedded reinforcing bars 120a and 120b, and thus corrosion of the concrete embedded reinforcing bars 120a and 120b is prevented. In this case, the carbon fiber textile 140 is made of a high stiffness and non-corrosive carbon fiber to simultaneously function as a conductor supplying a current for electrolytic protection with respect to the concrete embedded reinforcing bars 120a and 120b and as a reinforcing material reinforcing a cross-section of the deteriorated concrete part 130.

(35) Generally, electro-chemical protection of a reinforcing bar includes impressed current cathodic protection and the sacrificial anode method. The sacrificial anode method is a method of protecting a reinforcing bar, which is an object to be corroded, by connecting the reinforcing bar with a metal with an electric potential relatively lower than that of the reinforcing bar, which is an object to be corroded, to sacrificially corrode the metal.

(36) Specifically, when a sacrificial anode, which is a metal with a natural electrode potential lower than that of the concrete embedded reinforcing bars 120a and 120b, such as manganese (Mg), aluminum (Al), zinc (Zn) or the like, is directly connected to the concrete embedded reinforcing bars 120a and 120b or connected thereto by a connection wire, a cell reaction is formed between the concrete embedded reinforcing bars 120a and 120b and the sacrificial anode, and a metal ion is eluted from the sacrificial anode with a low potential difference so that a corrosion prevention current flows to the concrete embedded reinforcing bars 120a and 120b, and thus corrosion of the concrete embedded reinforcing bars 120a and 120b is prevented, which is referred to as the sacrificial anode method for a electrolytic protection method.

(37) In the carbon fiber textile reinforcing material with an anodic metal line according to one embodiment of the present invention, the anodic metal line 150 is uniaxially or polyaxially disposed on the carbon fiber textile 140, and the carbon fiber textile 140, which is a reinforcing material, is installed at the corresponding cross-section of the deteriorated concrete part 130 of the reinforced concrete structure 110, and thus installation of the anode is competed. The carbon fiber textile 140 functions as a conductor, and thus it is not necessary for the anode to be connected to the concrete embedded reinforcing bars 120a and 120b by a wire, and corrosion prevention is possible without many anodes being installed. In this case, the first connection wire 160a is connected, and then a current flows between the concrete embedded reinforcing bars 120a and 120b, which are conductors, and thus corrosion of the concrete embedded reinforcing bars 120a and 120b is prevented.

(38) FIGS. 6A-6B are photographs showing a reinforced concrete structure processed by a method of repairing and reinforcing a reinforced concrete structure using the carbon fiber textile reinforcing material with an anodic metal line according to one embodiment of the present invention.

(39) FIG. 6A shows that a corroded concrete embedded reinforcing bar 120 is exposed from a deteriorated concrete part of a reinforced concrete structure 110, and FIG. 6B is a photograph that shows that a surface of the deteriorated concrete part is finished by concrete or mortar 180 and a electrolytic protection terminal box 170 is exposed to the outside of the reinforced concrete structure 110, wherein the reinforced concrete structure 110 is processed by the method of repairing and reinforcing a reinforced concrete structure using a carbon fiber textile reinforcing material with an anode metal line according to one embodiment of the present invention.

(40) The carbon fiber textile reinforcing material with an anode metal line according to one embodiment of the present invention may be applied to a reinforced concrete structure in civil engineering and building fields, and may be also applied to repair and reinforcement of an old reinforced concrete structure.

(41) According to the present invention, the carbon fiber textile reinforcing material with an anodic metal line functioning as a conductor and a reinforcing material is disposed at a cross-section of concrete, and thus repair and reinforcement thereof can be performed with a high stiffness and non-corrosive carbon fiber textile.

(42) According to the present invention, a sacrificial anode arranged in the carbon fiber textile prevents additional corrosion of a concrete embedded reinforcing bar to maximize repair and reinforcement of a reinforced concrete structure.

(43) According to the present invention, the carbon fiber textile reinforcing material with an anodic metal line can prevent corrosion of an existing reinforced concrete structure and can be used as a reinforcing material and a corrosion preventing material of a new concrete structure.

(44) The above description is only exemplary, and it should be understood by those skilled in the art that the invention may be performed in other concrete forms without changing the technological scope and essential features. Therefore, the above-described embodiments should be considered as only examples in all aspects and not for purposes of limitation. For example, each component described as a single type may be realized in a distributed manner, and similarly, components that are described as being distributed may be realized in a coupled manner.

(45) The scope of the present invention is defined not by the detailed description but by the appended claims, and encompasses all modifications or alterations derived from meanings, the scope and equivalents of the appended claims.