System and method for reinforcing and protecting reinforced concrete structure employing carbon fiber textile grid as both reinforcement member and anode

Patent metadata

Field	Value
Publication number	US-10822706-B2
Application number	US-201816174292-A
Country	US
Kind code	B2
Filing date	Oct 30, 2018
Priority date	Jul 19, 2018
Publication date	Nov 3, 2020
Grant date	Nov 3, 2020

Abstract

Provided are a system and method for reinforcing and protecting a reinforced concrete structure in which a reinforced concrete structure is divided and corrosion factors of the divided cross-sectional regions are monitored to automatically supply a protection current to each of the divided cross-sectional regions, thereby actively performing protection of the reinforced concrete structure, and also, by adjusting the level of a protection current according to the progression of corrosion in each divided cross-sectional region of the reinforced concrete structure, power consumption required for protection is optimized and protection is effectively performed, and also by disposing a carbon fiber textile grid in the surface of the reinforced concrete structure to be employed as both a reinforcement member and an anode of the reinforced concrete structure, microcracking which may occur in concrete curing is inhibited and thus permeation of moisture or a chloride into the surface thereof is prevented.

First claim

What is claimed is:

1. A method for reinforcing and protecting a reinforced concrete structure employing a carbon fiber textile grid as both a reinforcement member and an anode, the method comprising:
a) dividing a reinforced concrete structure to be reinforced and protected into cross-sections;
b) disposing a carbon fiber textile grid in each of the divided cross-sections of the reinforced concrete structure, each carbon fiber textile grid to be adjacent to rebar embedded in the reinforced concrete structure;
c) connecting conductive wires for supplying a protection current to the carbon fiber textile grid and the embedded rebar, respectively;
d) installing a corrosion factor-measuring sensor for measuring a corrosion factor in each of the divided cross-sections of the reinforced concrete structure;
e) installing a protection controller comprising a corrosion-monitoring part, a protection current-setting part and a protection current-supplying part;
f) regularly monitoring the measured corrosion factor by the corrosion-monitoring part of the protection controller; and
g) setting a suitable protection current using the protection current-setting part of the protection controller by comparing the correction factor measured by the corrosion factor-measuring sensor with a corresponding threshold value, and supplying a protection current by the protection current-supplying part of the protection controller through the conductive wires,
wherein the protection controller monitors each of corrosion factors in a divided cross-sectional region of the reinforced concrete structure and automatically supplies the protection current to each divided cross-sectional region to protect the reinforced concrete structure, and
wherein the cross-sectional regions of the reinforced concrete structure are divided into at least two regions in a horizontal or vertical direction according to a corrosive environment, and the at least two regions are insulated and independently protected.

2. The method according to claim 1 , wherein the carbon fiber textile grid is disposed adjacent to the surface of the reinforced concrete structure to inhibit microcracking occurring during concrete curing and used as a reinforcement member to prevent permeation of moisture or a chloride, wherein the carbon fiber textile grid serves as an anode and the embedded bar serves as a cathode.

3. The method according to claim 1 , wherein the carbon fiber textile grid is coated with a material comprising styrene butadiene rubber (SBR) or nickel, to uniformly apply an electric current.

4. The method according to claim 1 , wherein the protection controller comprises:
a corrosion-monitoring part regularly monitoring the corrosion factors measured by the corrosion factor-measuring sensor;
a protection current-setting part sets a suitable protection current by comparing the corresponding threshold value with the corrosion factor measured by the corrosion factor-measuring sensor; and
a protection current-supplying part supplies the protection current set by the protection current-setting part to the embedded rebar through the conductive wires.

5. The method according to claim 4 , wherein the corrosion-monitoring part employs an electrochemical method or a physical method selectively as necessary, or a complementary combination thereof in order to monitor the corrosion of the embedded rebar, wherein the electrochemical method comprises the potentiometric method or linear polarization resistance and the physical method comprises optical sensor.

Assignees

• Korea Inst Civil Eng & Building Tech

Inventors

• Kim Hyeong Yeol
• Jin Seung Seop

Classifications

• Y02E70/30

  Systems combining energy storage with energy generation of non-fossil origin · CPC title

• E04G2023/0251

  by using fiber reinforced plastic elements · CPC title

• C23F13/16 Primary

  Electrodes characterised by the combination of the structure and the material · CPC title

• G01N27/041

  of a solid body · CPC title

• G01N17/02

  Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement · CPC title