CN206143309U - CFRP anodal reinforced concrete cathode protection device - Google Patents

Abstract

The utility model discloses a CFRP anodal reinforced concrete cathode protection device, including the concrete, bury complex root reinforcing bar, DC power supply and CFRP positive pole in the concrete, the CFRP positive pole for covering on the CFRP parcel layer on reinforcing bar surface, connect DC power supply anodal after CFRP parcel layer on the complex root reinforcing bar is parallelly connected, connect DC power supply's negative pole after the complex root reinforcing bar is parallelly connected. The utility model discloses a does reinforced concrete adopt CFRP the compound muscle of steel, CFRP the compound muscle of steel can prefabricate, and it is simple and convenient to be under construction, CFRP the CFRP positive pole of the compound muscle of steel is combined closely with the reinforcing bar as the negative pole and is in the same place, and resistance is little, and the power consumption is low.

Description

A kind of protecting reinforced concrete cathode device of CFRP anodes

[technical field]

The utility model is related to protecting reinforced concrete cathode, more particularly to a kind of armored concrete negative electrode of CFRP anodes Protection device.

[background technology]

Armored concrete as a kind of structural material, in being widely used in the buildings such as bridge, house.However, coagulation Soil is a kind of porosity material, at structure during the adverse environment such as Yu Haiyang, salt-soda soil, Frozen-thawed cycled, deicer salts, in environment Hazardous medium can penetrate into rebar surface by the hole in concrete, react therewith, cause steel bar corrosion, cause structure Service life be far below projected life.In order to tackle steel bar corrosion problem, the measure of current, conventional steel bar corrosion protection has Coating concrete surface impervious barrier, implement electrochemical cathodic protection, rebar surface using the good concrete of density, to reinforcing bar and add Anticorrosive coat, using improved corrosion reinforcing bar etc..In these measures, electrochemical cathodic protection method can directly suppress the electricity of reinforcing bar itself Chemical corrosion process, it is considered to be one of most efficient method.

According to the difference of cathode current applying mode, electrochemical cathodic protection method can be divided into impressed current method and sacrifice Anode process；Because impressed current method has the adjustable advantage of voltage x current, more favored by insider in Practical Project. Since being applied to reinforced concrete structure from impressed current method, people are devoted to researching and developing anode system, constantly have new Material is developed and applies.Such as, (1) main anode block+conductive covering layer, (2) main anode silk+conducting polymer, (3) main anode silk + sprayed metal layer, (4) main anode silk+conductive coating (5) cable anode, (6) metal oxide titanium net anode and (7) baried type Anode.Reinforced concrete structure is a kind of extremely complex heterogeneous system, and resistivity is high in concrete, and skewness is also received Environment and the impact in season.This just proposes higher requirement to selected anode system, and several anode systems of the above have The example of reinforced concrete structure is applied to, but has respective limiting, wherein, metal oxide titanium net anode is to exist now Anode system the most successful, but its material expensive are applied in the reinforced concrete cathodic protection of hilllock, engineering cost is significantly increased, This is for being an obstacle for being difficult to avoid in its application in Practical Project.

A kind of armored concrete of the embedded anodes of employing CFRP of the disclosure of the invention of Application No. CN201310131212.9 Cathode protecting process and device, methods described includes step：Groove is opened up in the protection zone position by given size；In steel The protection zone surface of tendon concrete structure body arranges CFRP sheet materials, and the CFRP sheet materials include the ribbed stiffener being adapted to groove And be fixed on the stiffener of protection zone inner surface；Binding material is applied to into the ribbed stiffener and concrete of the CFRP sheet materials Between side surface that groove is connected and stiffener and concrete, by ribbed stiffener and concrete groove and stiffener and concrete Embedded connection.The device due to be embedded in concrete into stiffening rib structure using CFRP sheet material designs reduce CFRP sheet materials with The distance between reinforcing bar, reduces resistance between the two, so as to be conducive to xoncrete structure in protective current continuous uniform Distribution, can reach more preferable protected effect.

But man-hour requirement secondary operation, construction trouble are applied in the invention；Since it is desired that secondary operation, anode material and coagulation Adhesion strength between soil is difficult to ensure that the concertedness worked between anode material and concrete is bad；Anode material and negative electrode Concrete thickness between material (reinforcing bar) is larger, and the resistance between negative electrode and anode is big, big energy-consuming.

[content of the invention]

It is little that the technical problems to be solved in the utility model is to provide a kind of easy construction, the resistance between negative electrode and anode The protecting reinforced concrete cathode device of CFRP anodes.

In order to solve above-mentioned technical problem, the technical solution adopted in the utility model is that a kind of reinforcing bar of CFRP anodes is mixed Solidifying soil cathode protection device, including concrete, the complex root reinforcing bar, dc source and the CFRP anodes that are embedded in concrete, it is described CFRP anodes be the CFRP integuments for being covered in rebar surface, the CFRP integument parallel connections on complex root reinforcing bar are followed by direct current Source positive pole, complex root bar parallel is followed by the negative pole of dc source.

Above-described protecting reinforced concrete cathode device, the carbon fiber in CFRP integuments is along the axial direction of reinforcing bar point Cloth.

Armored concrete of the present utility model adopts CFRP- steel composite reinforcings, and CFRP- steel composite reinforcing can be with prefabricated, construction letter Folk prescription is just；The CFRP anodes of CFRP- steel composite reinforcings and the reinforcing bar as negative electrode are closely linked, and resistance is little, consume energy low.

[description of the drawings]

The utility model is described in further detail with reference to the accompanying drawings and detailed description.

Fig. 1 is the structural representation in the protecting reinforced concrete cathode device vertical section of the utility model embodiment CFRP anode Figure.

Fig. 2 is the structural representation in the protecting reinforced concrete cathode device cross section of the utility model embodiment CFRP anode Figure.

[specific embodiment]

The structure of the protecting reinforced concrete cathode device of the utility model embodiment CFRP anode as depicted in figs. 1 and 2, Including concrete and many CFRP- steel composite reinforcings being embedded in concrete 3, CFRP- steel composite reinforcings include the reinforcing bar 1 as inner core With the CFRP integuments 2 on the surface for covering reinforcing bar.The parallel connection of CFRP integuments 2 on reinforcing bar 1 is followed by the positive pole of dc source B, makees The parallel connection of reinforcing bar 1 for inner core is followed by the negative pole of dc source B.Carbon fiber edge in CFRP- steel composite reinforcings, in CFRP integuments 2 The axial direction distribution of reinforcing bar 1.

CFRP- steel composite reinforcings (the Carbon Fiber Steel that the reinforcing bar of the utility model embodiment is adopted Composite Bar), CFRP- steel composite reinforcings are that one kind combines continuous carbon fibre and regular reinforcement bi-material performance advantage NEW TYPE OF COMPOSITE muscle material；I.e. using the processing technology of FRP muscle, in reinforcing bar external pasting CFRP, continuous fiber is drawn to as interior The rebar surface of core so as to be uniformly distributed vertically in rebar surface, through mould extruding, drawing, the CFRP- steel solidifying to form Composite reinforcing.

The utility model proposes a kind of principal rod for using CFRP- steel composite reinforcing as reinforced concrete structure, and with CFRP- steel composite reinforcings serve as anode/cathode carries out the cathode protection device of self-shield.For single CFRP- steel composite reinforcing, CFRP protective layers outside composite reinforcing as cathodic protection circuit anode, as the regular reinforcement of muscle material inner core inside composite reinforcing Serve as negative electrode in cathodic protection circuit, CFRP protective layers electrically connected with the positive pole of dc source, regular reinforcement inner core with it is straight The negative pole of stream power supply, the cathodic protection circuit of formation；For the armored concrete using CFRP- steel composite reinforcing as principal rod is tied Structure, the CFRP protective layers of CFRP- steel composite reinforcing in reinforced concrete structure is electrically connected, as the sun of cathodic protection circuit Electrode systems, will be electrically connected in CFR- steel composite reinforcings as the regular reinforcement of inner core, right as the cathod system of cathode circuit CFRP- steel composite reinforcing carries out self-shield.Serve as anode system in this cathode protecting process is outside CFRP- steel composite reinforcings CFRP protective layers, i.e., without using other materials as anode system, reduce engineering cost.Because each CFRP- steel is answered Close simultaneously with the presence of the CFRP protective layers and the regular reinforcement as negative electrode as anode in muscle, from into a cathodic protection electricity Road, because CFRP protective layers and regular reinforcement are the presence that is closely linked respectively as a part for composite reinforcing, two Will not be disturbed by concrete between person, therefore resistance between the two is less, and circuit is more stable.

For the reinforced concrete structure with CFRP- steel composite reinforcings as principal rod, in structure casting concrete, (or component is pre- System) when, by the CFRP protective layers with CFRP- steel composite reinforcings be electrically connected, and be connected with dc source anode；To match somebody with somebody multiple Close the regular reinforcement in muscle as inner core to be electrically connected, and be connected with the negative pole of dc source.After energization, electric charge (electronics) by Dc source flows to the inner core (cathode electrode) of CFRP- steel composite reinforcings by wire, makes regular reinforcement cathodic polarization, suppresses reinforcing bar The oxidation reaction of inner core；Under electric field action, Cl^-Move away from the direction of regular reinforcement, reduce around regular reinforcement Cl^-Concentration, to regular reinforcement protective effect is provided.

Compared with prior art, the beneficial effects of the utility model are embodied in：

1st, easy construction：Compared with conventional anode system, the utility model proposes CFRP- steel composite reinforcing anode systems exist There is fairly obvious advantage in engineering construction.Especially when the cathodic protection in being applied to newly-built reinforced concrete structure, The newly-built reinforced concrete structure being such as used in erosion environment, can be mounted directly (pre-buried) in structure before casting concrete On, without the need for secondary operation, easy construction, greatly reduce construction volume.

2nd, improve the utilization rate of material：The utility model proposes cathode protecting process in, with xoncrete structure make A part for the CFRP- steel composite reinforcing of principal rod itself carries out cathodic protection as anode to principal rod, and without using it His anode material a, muscle is multiplex, improves the utilization rate of material.

3rd, with obvious economic benefit：Due to this device it is common with protected as the CFRP protective layers of anode system Reinforcing bar inner core is closely linked, and reduces resistance between the two, while improve the stability of circuit, therefore is using Middle electric energy expends less.

Claims (2)

1. a kind of protecting reinforced concrete cathode device of CFRP anodes, including concrete, the complex root steel being embedded in concrete Muscle, dc source and CFRP anodes, it is characterised in that described CFRP anodes are the CFRP integuments for being covered in rebar surface, CFRP integument parallel connections on complex root reinforcing bar are followed by DC power anode, and complex root bar parallel is followed by the negative of dc source Pole.

2. protecting reinforced concrete cathode device according to claim 1, it is characterised in that the carbon in CFRP integuments is fine Tie up and be distributed along the axial direction of reinforcing bar.