Cathode Protection Method and Apparatus for Reinforced Concrete Structure and Composite Structure and Processing Method for Reinforced Concrete Structure

Abstract

A cathode protection method of embedded CFRP anode for reinforced concrete structure includes the following steps. Provide a preformed groove with a predetermined shape and size in a surface of a protection area of a reinforced concrete body, and remove dust in the preformed groove. Provide a CFRP member on the surface of the protection area of the reinforced concrete body. Coat an electrical conductive adhesive material between side surfaces of the reinforcing column of the CFRP member and the preformed groove and between the reinforcing plate and the reinforced concrete body. Connect the CFRP member with a positive electrode of an external DC power supply and the steel reinforcing element with a negative electrode of the external DC power supply.

What is claimed is: 
     
         1 . A cathode protection method of embedded CFRP anode for reinforced concrete structure, comprising the steps of:
 (a) providing a preformed groove with a predetermined shape and size in a surface of a protection area of a reinforced concrete body, and removing dust in said preformed groove;   (b) providing a CFRP member on said surface of said protection area of said reinforced concrete body, wherein said CFRP member comprises a reinforcing column shaped and sized with respect to said preformed groove and at least at least a reinforcing plate integrally connected with said reinforcing column and affixed on said surface of said protection area of said reinforced concrete body;   (c) coating an adhesive material with electrical conductive ability on side surfaces of said reinforcing column of said CRFP member and said preformed groove of said reinforced concrete body to be connected with other and between said reinforcing plate and said reinforced concrete body, so as to embed said reinforcing column in said preformed groove of said reinforced concrete body and connect said reinforcing plate with said reinforced concrete body; and   (d) connecting said CFRP member with a positive electrode of an external DC power supply and connecting at least a steel reinforcing element in said reinforced concrete body with a negative electrode of said external DC power supply, wherein said steel reinforcing element and said adhesive material are electrically connected via said reinforced concrete body, said CFRP member and said external DC power supply to form a close electrical conductive circuit.   
     
     
         2 . The method, as recited in  claim 1 , before the step (a), further comprising a step of removing loose concrete within said protection area of said reinforced concrete body and polishing and smoothing to flat and clean. 
     
     
         3 . The method, as recited in  claim 1 , between the step (b) and step (c), further comprising the steps of filling said adhesive material to any uneven and non-flat area of said reinforced concrete body, squeezing to remove air mixed in said adhesive material in said protection area, and removing excessive portion of said adhesive material. 
     
     
         4 . The method, as recited in  claim 2 , between the step (b) and step (c), further comprising the steps of filling said adhesive material to any uneven and non-flat area of said reinforced concrete body, squeezing to remove air mixed in said adhesive material in said protection area, and removing excessive portion of said adhesive material. 
     
     
         5 . The method, as recited in  claim 1 , wherein the step (c) further comprises a steps of electrically connecting said steel reinforcing elements in said protection area and ensuring an electrical conductivity between said steel reinforcing elements. 
     
     
         6 . The method, as recited in  claim 4 , wherein the step (c) further comprises a steps of electrically connecting said steel reinforcing elements in said protection area and ensuring an electrical conductivity between said steel reinforcing elements. 
     
     
         7 . The method, as recited in  claim 1 , before the step (c) and (d), further comprising a step of ensuring electrical conductivity between said steel reinforced element, said reinforced concrete body and said CFRP member. 
     
     
         8 . The method, as recited in  claim 6 , before the step (c) and (d), further comprising a step of ensuring electrical conductivity between said steel reinforced element, said reinforced concrete body and said CFRP member. 
     
     
         9 . The method, as recited in  claim 1 , wherein said adhesive material is selected from a group consisting of cement grout and epoxy flues with conductive particles. 
     
     
         10 . The method, as recited in  claim 8 , wherein said adhesive material is selected from a group consisting of cement grout and epoxy flues with conductive particles. 
     
     
         11 . A cathode protection apparatus of embedded CFRP anode for reinforced concrete structure, comprising:
 a reinforced concrete body comprising one or more steel reinforcing elements embedded therein and having at least a preformed groove therein and defining adjacent side surfaces thereon adjacent to said preformed groove;   at least a CFRP member comprising a reinforcing column and a reinforcing plate integrally connected with the said column, wherein said reinforcing column is shaped and sized with respect to said preformed groove and inserted into said preformed groove while said reinforcing plate facing said side surfaces;   an electrical conductive adhesive material applied between the reinforcing column and side surfaces of preformed groove and between said adjacent side surfaces of reinforced concrete body and said reinforcing plate; and   a direct current (DC) power supply which has a positive electrode connecting with said CFRP member and a negative electrode connecting with said steel reinforcing elements in said reinforced concrete body in such a manner that said steel reinforcing elements, said adhesive material, said concrete, and said CFRP member form a close conductive circuit.   
     
     
         12 . The apparatus, as recited in  claim 11 , wherein said CFRP member is a CFRP plate. 
     
     
         13 . The apparatus, as recited in  claim 11 , wherein said steel reinforcing elements within said protection area are electrically connected with each other. 
     
     
         14 . The apparatus, as recited in  claim 12 , wherein said steel reinforcing elements within said protection area are electrically connected with each other. 
     
     
         15 . The apparatus, as recited in  claim 11 , wherein said adhesive material is selected from a group consisting cement grout and epoxy flues with conductive particles. 
     
     
         16 . The apparatus, as recited in  claim 14 , wherein said adhesive material is selected from a group consisting cement grout and epoxy flues with conductive particles. 
     
     
         17 . A processing method for reinforced concrete structure with automatic cathode protection CFRP structure, comprising steps of:
 a. integrally mounting a reinforced concrete body with a CFRP member:   b. mounting said CFRP member on a surface of a reinforcing region of said reinforced concrete body;   c. embedding at least one steel reinforcing elements around an inner peripheral of said reinforced concrete body; and   d. connecting an external power supply to said CFRP member for impressing current to said steel reinforcing elements, such that said steel reinforcing element, said external power supply, and said CFRP member form a close current loop.   
     
     
         18 . The processing method, as recited in  claim 17 , wherein said CFRP member is a composite material mixing with different fibers and matrix materials. 
     
     
         19 . A composite structure for reinforced concrete structure with automatic cathode protection CFRP structure, comprising:
 a CFRP member arranged on a surface of a reinforcing region of a reinforced concrete body;   at least one steel reinforcing elements embedded into said reinforced concrete body; and   an external power supply connected to said CFRP member for impressing current to said steel reinforcing elements; wherein   said reinforced concrete body is integrally mounting with said CFRP member.   
     
     
         20 . The composite structure, as recited in  claim 19 , wherein a plurality of said steel reinforcing elements is embedded into said reinforced concrete body, and all said steel reinforcing elements are electrically connected. 
     
     
         21 . The composite structure, as recited in  claim 19 , wherein said external power supply is a DC power supply. 
     
     
         22 . The composite structure, as recited in  claim 19 , wherein said reinforced concrete body is selected from a group consisting of a rectangular structure and a cylindrical structure. 
     
     
         23 . The composite structure, as recited in  claim 19 , wherein said reinforced concrete body is a circular concrete column and a plurality of said steel reinforcing elements are arranged around a peripheral of said reinforced concrete body and each of said steel reinforcing elements is electrically connected. 
     
     
         24 . The composite structure, as recited in  claim 19 , wherein said CFRP member is a CFRP pipe.