JP3059997B2 - Anode installation method for reinforced concrete structure cathodic protection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[Industrial applications]

The present invention relates to an improvement in an anode installation method in a reinforced concrete structure cathodic protection method.

[Prior art]

Reinforcement that is the object of anticorrosion in reinforced concrete structures
A coating method, a mesh method, and the like are known as a method of preventing corrosion of reinforced concrete structures by preventing the formation of ferrous ions or the like by functioning as a DC current receiving cathode and reducing or eliminating corrosion of reinforcing bars. . For the installation of the anode in the paint method, the existing coating film on the concrete surface of the reinforced concrete structure is peeled off and removed, the exposed concrete surface is grooved at required intervals, and the linear anode is laid in the groove. A conductive putty is filled, the anode is buried, a conductive paint is applied to the entire concrete surface including the surface of the conductive putty, and a top coat is further applied to finish. In addition, in order to install the anode in the mesh method, the existing coating film on the concrete surface of the reinforced concrete structure is peeled off, a mesh anode is stretched on the exposed concrete surface, and a polymer cement mortar is sprayed and coated thereon. Finished.

[Problems to be solved by the invention]

Regarding the installation of the anode in the above-mentioned paint system and mesh system, in any case, the removal of the existing coating film, the application of a plurality of grooving and conductive paint, or the laying and finishing of the mesh anode are all performed on the entire target area. And therefore, the construction becomes large-scale,
The disadvantage is that a relatively long construction period and high costs are required. An object of the present invention is to eliminate such disadvantages.

[Means for Solving the Problems]

According to the method of the present invention, a plurality of grooves 4 are dug at a predetermined interval from the reinforced concrete structure 1 without removing the existing coating film 3, and a linear anode 6 is set in the grooves 4. A reinforced concrete structure which is supported by a frame, filled with a conductive putty 11, embeds a linear anode 6 in the conductive putty 11, and finishes the outer surface of the conductive putty 11 by applying a weather-resistant paint 12. This is the method of installing the anode in the anticorrosion method. In the above, a synthetic resin electrode support pin 5 having a pair of legs 8, 8 hanging from the head 7 is attached to the bottom of the concave groove 4 with the linear anode 6 sandwiched between the legs 8, 8. By striking and supporting the linear anode 6 at a predetermined height in the concave groove 4, the linear anode 6 can be easily and reliably stretched to a predetermined position, It does not displace when the conductive putty 11 is filled.

[Operation]

According to the method of the present invention, the installation of the filament anode can be performed easily and in a short period of time without requiring a large-scale construction as in the prior art, and the construction cost can be reduced. In addition, since the outer peripheral surface of the conductive putty can have a sufficient surface area to provide good current distribution to the reinforcing bar, a desired anticorrosion effect can be expected.

【Example】

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a reinforced concrete structure in which a reinforcing bar 2 is buried and which has an existing coating 3 on the concrete surface. Drill 4 Reference numeral 5 denotes a synthetic resin electrode support pin used to support a linear anode 6 which is, for example, a platinum-plated titanium wire, in the concave groove 4. The electrode support pin is formed on the lower surface of the head 7 with a fine sawtooth outer surface and a lower end. A pair of sharpened legs 8 and 8 are suspended in a bifurcated manner, and semicircular cutouts 9 and 9 are formed at upper positions on the inner surfaces of the legs 8 and 8 (FIG. 3). The electrode support pin 5 is provided with the above-mentioned linear anode 6 inserted in the cutouts 9, 9 and the legs 8, 8 are closed and sandwiched. 10 (FIG. 4), whereby the filament anode 6 is stretched and supported at a predetermined height in the groove 4. Next, the groove 4 is filled with a conductive putty 11 to bury the linear anode 6, and the upper surface thereof is coated with a weather-resistant paint 12 to finish.

【The invention's effect】

As is apparent from the above description, according to the method of the present invention, the installation of the filament anode can be performed easily and in a short time without the need for a large-scale construction as in the related art, and the construction cost is also reduced. By appropriately setting the size of the groove to be dug, that is, the inner surface area, the outer surface of the conductive putty to be filled for embedding the linear anode therein can be reduced. Because it can have enough surface area to give
Expected anticorrosion effect can be expected.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings are for explaining the embodiment of the present invention, and FIG. 1 is a perspective view of a reinforced concrete structure in a state where a linear anode has been laid, FIG. 2 is an enlarged sectional view of a main part, and FIG. FIG. 4 is a perspective view of an electrode support pin, and FIG. 4 is a perspective view of a state in which a linear anode in a concave groove is stretched and supported. DESCRIPTION OF SYMBOLS 1 ... Reinforced concrete structure, 2 ... Reinforcing bar, 3 ... Existing coating film, 4 ... Concave groove, 5 ... Electrode support pin, 6 ... Striated anode, 7 ... Head, 8 ... Leg, 9 Notch, 10 Mounting hole, 11 Conductive putty, 12 Weatherproof paint.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shimohiko Morita 2nd Sanbancho, Chiyoda-ku, Tokyo Tobishima Construction Co., Ltd. (72) Inventor Kazuhiro Ono 2nd Sanbancho, Chiyoda-ku, Tokyo Tobishima Construction Co., Ltd. (72) Inventor Shun-ichiro Mita 726-11 Kakinuma, larger section of Kumagaya City, Saitama Prefecture (72) Inventor Kazuo Muto 5-11-4 Takanodai, Nerima-ku, Tokyo (58) Field surveyed (Int.Cl. ⁷ , DB name) C23F 13/00

Claims (2)

(57) [Claims] 1. A plurality of grooves are dug at a required interval from above without removing an existing coating film on a reinforced concrete structure, and a linear anode is inserted and stretched in the grooves to conduct electricity. Anode installation in a reinforced concrete structure cathodic protection method characterized by filling a conductive putty, embedding a linear anode in the conductive putty, and applying a weather-resistant paint to the outer surface of the conductive putty. Method. 2. An electrode support pin made of a synthetic resin having a pair of legs hanging down from the head is struck on the bottom of the groove with the linear anode sandwiched between the legs. The method according to claim 1, wherein the strip anode is supported by tension at a predetermined height in the groove.