Cathode protection method and apparatus for reinforced concrete structure and composite structure and processing method for reinforced concrete structure

A cathode protection method for a reinforced concrete structure, comprising the steps of:

• (a) embedding a plurality of steel reinforcing elements in a surface of a protection area of a reinforced concrete body, and electrically connecting said steel reinforcing elements with each other in said protection area;
• (b) treating said surface of said protection area of said reinforced concrete body by the steps of polishing and smoothing said surface of said protection area of said reinforced concrete body, applying an adhesive on any uneven and non-flat area of said reinforced concrete body, removing air mixed in said adhesive in said protection area, and removing excessive adhesive in said protection area;
• (c) forming a preformed groove with a predetermined shape and size on said surface of said protection area of said reinforced concrete body, and removing dust in said preformed groove;
• (d) forming a CFRP member which comprises a reinforcing column and a reinforcing plate integrally connected with said reinforcing column, wherein said reinforcing column is sized and shaped matching with said preformed groove;
• (e) applying an electrically conductive adhesive material on said CFRP member and placing said CFRP member on said protection area of said reinforced concrete body at a position that said reinforcing column is inserted into said preformed groove and said reinforcing plate covers said surface of said protection area of said reinforced concrete body, wherein via said electrically conductive adhesive material, said reinforcing column is adhered in said preformed groove and said reinforcing plate is adhered on said surface of said protection area of said reinforced concrete body so as to embed said reinforcing column in said preformed groove of said reinforced concrete body and to cover said preformed groove by said reinforcing plate;
• and
• (f) electrically connecting an external DC power supply with said CFRP member and said steel reinforcing elements in said reinforced concrete body by electrically connecting said CFRP member with a positive electrode of said external DC power supply and electrically connecting said steel reinforcing elements with a negative electrode of said external DC power supply, wherein said steel reinforcing elements and said electrically conductive adhesive material are electrically connected via said reinforced concrete body, said CFRP member and said external DC power supply to form a closed electrical conductive circuit.