CN106283071A - A kind of protecting reinforced concrete cathode method and apparatus of CFRP anode - Google Patents

A kind of protecting reinforced concrete cathode method and apparatus of CFRP anode Download PDF

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Publication number
CN106283071A
CN106283071A CN201610842340.8A CN201610842340A CN106283071A CN 106283071 A CN106283071 A CN 106283071A CN 201610842340 A CN201610842340 A CN 201610842340A CN 106283071 A CN106283071 A CN 106283071A
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China
Prior art keywords
cfrp
anode
steel composite
reinforced concrete
reinforcing
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CN201610842340.8A
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CN106283071B (en
Inventor
周英武
潘俊
隋莉莉
邢锋
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Shenzhen University
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Shenzhen University
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/20—Conducting electric current to electrodes
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/10—Electrodes characterised by the structure
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F2201/00—Type of materials to be protected by cathodic protection
    • C23F2201/02—Concrete, e.g. reinforced

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Prevention Of Electric Corrosion (AREA)

Abstract

The invention discloses the protecting reinforced concrete cathode method and apparatus of a kind of CFRP anode.Complex root reinforcing bar, DC source and the CFRP anode that protecting reinforced concrete cathode device includes concrete, is embedded in concrete; described CFRP anode is to cover the CFRP integument at rebar surface; CFRP integument parallel connection on complex root reinforcing bar is followed by DC power anode, and complex root bar parallel is followed by the negative pole of DC source.The armored concrete of the present invention uses CFRP steel composite reinforcing, and CFRP steel composite reinforcing can be prefabricated, constructs simple and convenient；The CFRP anode of CFRP steel composite reinforcing and the reinforcing bar as negative electrode are closely linked, and resistance is little, consumes energy low.

Description

A kind of protecting reinforced concrete cathode method and apparatus of CFRP anode
[technical field]
The present invention relates to protecting reinforced concrete cathode, particularly relate to the protecting reinforced concrete cathode of a kind of CFRP anode Method and apparatus.
[background technology]
Armored concrete, as a kind of structural material, is widely used in the building such as bridge, house.But, coagulation Soil is a kind of porosity material, at structure during the adverse environment such as Yu Haiyang, salt-soda soil, freeze-thaw cycle, deicer salts, in environment Hazardous medium can penetrate into rebar surface by the hole in concrete, reacts therewith, causes steel bar corrosion, causes structure Service life 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, use the good concrete of density, reinforcing bar is implemented electrochemical cathodic protection, rebar surface adds Anticorrosive coat, application improved corrosion reinforcing bar etc..In these measures, electrochemical cathodic protection method can directly suppress the electricity of reinforcing bar self Chemical corrosion process is it is considered to be one of most efficient method.
Apply the difference of mode according to cathode current, electrochemical cathodic protection method can be divided into impressed current method and sacrifice Anode process；Owing to impressed current method has the adjustable advantage of voltage x current, more favored by insider in Practical Project. Since impressed current method is applied to reinforced concrete structure, people are devoted to research and develop anode system, constantly have new Material is developed and applies.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 in concrete, resistivity is high, and skewness is also subject to Environment and the impact in season.This just proposes higher requirement to selected anode system, and above several anode systems all have Being applied to the example of reinforced concrete structure, but have respective limiting, wherein, metal-oxide titanium net anode is to exist now Hilllock reinforced concrete cathodic protection applies the most successfully anode system, but its material expensive, significantly increase engineering cost, This is for being an obstacle being difficult to avoid in its application in Practical Project.
A kind of armored concrete using CFRP to embed anode of the disclosure of the invention of Application No. CN201310131212.9 Cathode protecting process and device, described method includes step: offer groove in position, described protection zone by given size；At steel The protection zone surface configuration CFRP sheet material of tendon concrete structure body, described CFRP sheet material includes the ribbed stiffener adaptive with groove And be fixed on the stiffener of protection zone inner surface；Binding material is spread upon ribbed stiffener and the concrete of described CFRP sheet material Between side surface and stiffener and concrete that groove is connected, by ribbed stiffener and concrete groove and stiffener and concrete Embed and connect.This device due to use CFRP sheet material design become stiffening rib structure to be embedded in concrete to reduce CFRP sheet material with Distance between reinforcing bar, reduces resistance between the two, thus the beneficially continuous uniform of protective current in xoncrete structure Distribution, can reach more preferable protected effect.
But man-hour requirement secondary operation, construction trouble are executed in this invention；Since it is desired that secondary operations, 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 relatively big, and the resistance between negative electrode and anode is big, big energy-consuming.
[summary of the invention]
The CFRP that resistance that the technical problem to be solved in the present invention is to provide between a kind of easy construction, negative electrode and anode is little The protecting reinforced concrete cathode device of anode.
The present invention another to solve the technical problem that the resistance being to provide between a kind of easy construction, negative electrode and anode is little The protecting reinforced concrete cathode method of CFRP anode.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is, the armored concrete of a kind of CFRP anode Cathode protection device, the complex root reinforcing bar including concrete, being embedded in concrete, DC source and CFRP anode, described CFRP anode is to cover the CFRP integument at rebar surface, and the CFRP integument parallel connection on complex root reinforcing bar is followed by DC 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 integument is along axial point of reinforcing bar Cloth.
A kind of protecting reinforced concrete cathode method of CFRP anode, uses CFRP-steel composite reinforcing as armored concrete In reinforcing bar use, and the CFRP integument of CFRP-steel composite reinforcing rebar surface is connect as anode the positive pole of DC source, will The reinforcing bar inner core of CFRP-steel composite reinforcing connects the negative pole of DC source as negative electrode.
Above-described protecting reinforced concrete cathode method, the carbon fiber in the CFRP integument of CFRP-steel composite reinforcing Axial distribution along CFRP-steel composite reinforcing.
Above-described protecting reinforced concrete cathode method, CFRP-steel composite reinforcing makes according to the following steps: by continuous print Carbon fiber traction is to the rebar surface as inner core so that it is be uniformly distributed vertically at rebar surface, through mould extruding, draws The CFRP-steel composite reinforcing pull out, solidifying to form.
The armored concrete of the present invention uses CFRP-steel composite reinforcing, and CFRP-steel composite reinforcing can be prefabricated, the simple side of construction Just；The CFRP anode of CFRP-steel composite reinforcing and the reinforcing bar as negative electrode are closely linked, and resistance is little, consumes energy low.
[accompanying drawing explanation]
The present invention is further detailed explanation with detailed description of the invention below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation in the protecting reinforced concrete cathode device vertical section of embodiment of the present invention CFRP anode.
Fig. 2 is the structural representation in the protecting reinforced concrete cathode device cross section of embodiment of the present invention CFRP anode.
[detailed description of the invention]
The structure of the protecting reinforced concrete cathode device of embodiment of the present invention CFRP anode as depicted in figs. 1 and 2, including Concrete and the many CFRP-steel composite reinforcings being embedded in concrete 3, CFRP-steel composite reinforcing includes the reinforcing bar 1 as inner core and covers The CFRP integument 2 on the surface of lid reinforcing bar.CFRP integument 2 parallel connection on reinforcing bar 1 is followed by the positive pole of DC source B, as interior Reinforcing bar 1 parallel connection of core is followed by the negative pole of DC source B.In CFRP-steel composite reinforcing, the carbon fiber in CFRP integument 2 is along reinforcing bar 1 Axial distribution.
CFRP-steel composite reinforcing (the Carbon Fiber Steel Composite that the reinforcing bar of the embodiment of the present invention uses Bar), CFRP-steel composite reinforcing is a kind of NEW TYPE OF COMPOSITE combining continuous carbon fibre and regular reinforcement bi-material performance advantage Muscle material；I.e. utilize the processing technique of FRP muscle, at reinforcing bar external pasting CFRP, using the traction of continuous print carbon fiber to the steel as inner core Muscle surface so that it is be uniformly distributed vertically at rebar surface, is combined through mould extruding, drawing, the CFRP-steel that solidify to form Muscle.
The present invention propose a kind of use CFRP-steel composite reinforcing as the principal rod of reinforced concrete structure, and with CFRP- Steel composite reinforcing serves as anode/cathode and carries out the cathode protection device of self-shield.For single CFRP-steel composite reinforcing, compound CFRP protective layer outside muscle is as the anode of cathodic protection circuit, as the regular reinforcement of muscle material inner core at the moon inside composite reinforcing Pole protection circuit serves as negative electrode, CFRP protective layer is connected with the positive electrical of DC source, regular reinforcement inner core and unidirectional current The negative pole in source, the cathodic protection circuit of formation；For the reinforced concrete structure using CFRP-steel composite reinforcing as principal rod, will In reinforced concrete structure, the CFRP protective layer of CFRP-steel composite reinforcing is electrically connected, as the anode system of cathodic protection circuit System, is electrically connected regular reinforcement as inner core in CFR-steel composite reinforcing, as the cathod system of cathode circuit, right CFRP-steel composite reinforcing carries out self-shield.Serve as anode system in this cathode protecting process is that CFRP-steel composite reinforcing is outside CFRP protective layer, i.e. without using other materials as anode system, reduces engineering cost.Owing to each CFRP-steel is multiple Simultaneously with the presence of the CFRP protective layer as anode and the regular reinforcement as negative electrode in conjunction muscle, from becoming a cathodic protection electricity Road, owing to CFRP protective layer and regular reinforcement are to be closely linked respectively as a part for composite reinforcing to exist, two Will not be disturbed by concrete between person, resistance the most between the two is less, and circuit is more stable.
For the reinforced concrete structure with CFRP-steel composite reinforcing as principal rod, at structure casting concrete, (or component is pre- System) time, the CFRP protective layer of joined CFRP-steel composite reinforcing is electrically connected, and is connected with DC source anode；Multiple by being joined Close the interior regular reinforcement as inner core of muscle to be electrically connected, and be connected with the negative pole of DC source.After energising, electric charge (electronics) by DC source flows to the inner core of CFRP-steel composite reinforcing (cathode electrode) by wire, makes regular reinforcement cathodic polarization, suppresses reinforcing bar The oxidation reaction of inner core；Under electric field action, Cl-Direction away from regular reinforcement is moved, and reduces around regular reinforcement Cl-Concentration, provides protective effect to regular reinforcement.
Compared with prior art, beneficial effects of the present invention is embodied in:
1, easy construction: compared with conventional anode system, the CFRP-steel composite reinforcing anode system that the present invention proposes is in engineering Fairly obvious advantage is had in construction.Especially when the cathodic protection being applied in newly-built reinforced concrete structure, as with On newly-built reinforced concrete structure in erosion environment, (pre-buried) can be mounted directly before casting concrete structurally, Without secondary operation, easy construction, greatly reduce construction volume.
2, improve the utilization rate of material: in the cathode protecting process that the present invention proposes, as being subject in xoncrete structure A part for the CFRP-steel composite reinforcing of power muscle itself carries out cathodic protection as anode to principal rod, and without using other sun Pole material, a muscle is multiplex, improves the utilization rate of material.
3, there is obvious economic benefit: due to this device as anode system CFRP protective layer with protected commonly Reinforcing bar inner core is closely linked, and reduces resistance between the two, improves the stability of circuit simultaneously, is therefore using Middle electric energy expends less.

Claims (5)

1. a protecting reinforced concrete cathode device for CFRP anode, including concrete, the complex root steel that is embedded in concrete Muscle, DC source and CFRP anode, it is characterised in that described CFRP anode is to cover the CFRP integument at rebar surface, CFRP integument parallel connection on complex root reinforcing bar is followed by DC power anode, and complex root bar parallel is followed by the negative of DC source Pole.
Protecting reinforced concrete cathode device the most according to claim 1, it is characterised in that the carbon in CFRP integument is fine Tie up the axial distribution along reinforcing bar.
3. the protecting reinforced concrete cathode method of a CFRP anode, it is characterised in that use CFRP-steel composite reinforcing as steel Reinforcing bar in reinforced concrete uses, and as anode, the CFRP integument of CFRP-steel composite reinforcing rebar surface is connect DC source Positive pole, the reinforcing bar inner core of CFRP-steel composite reinforcing is connect as negative electrode the negative pole of DC source.
Protecting reinforced concrete cathode method the most according to claim 3, it is characterised in that CFRP-steel composite reinforcing Carbon fiber in CFRP integument is along the axial distribution of CFRP-steel composite reinforcing.
Protecting reinforced concrete cathode method the most according to claim 3, it is characterised in that CFRP-steel composite reinforcing by with Lower step makes: using the traction of continuous print carbon fiber to the rebar surface as inner core so that it is the most uniformly divide at rebar surface Cloth, through mould extruding, drawing, the CFRP-steel composite reinforcing that solidify to form.
CN201610842340.8A 2016-09-22 2016-09-22 A kind of protecting reinforced concrete cathode method and apparatus of CFRP anodes Active CN106283071B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113216511A (en) * 2021-05-18 2021-08-06 深圳大学 FRP pipe and steel bar combined ICCP-SS seawater sea sand concrete composite beam

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1077232A (en) * 1992-03-23 1993-10-13 约翰·B·米勒 The method of passivation reinforcing bar in carbonization and/or chloride contaminated concrete
CN103469212A (en) * 2013-08-05 2013-12-25 青岛双瑞海洋环境工程股份有限公司 Positive electrode conductive filler used for negative electrode protection system of reinforced concrete
CN206143309U (en) * 2016-09-22 2017-05-03 深圳大学 CFRP anodal reinforced concrete cathode protection device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1077232A (en) * 1992-03-23 1993-10-13 约翰·B·米勒 The method of passivation reinforcing bar in carbonization and/or chloride contaminated concrete
JPH07232976A (en) * 1992-03-23 1995-09-05 John B Miller Method for passivating steel material in concrete
CN103469212A (en) * 2013-08-05 2013-12-25 青岛双瑞海洋环境工程股份有限公司 Positive electrode conductive filler used for negative electrode protection system of reinforced concrete
CN206143309U (en) * 2016-09-22 2017-05-03 深圳大学 CFRP anodal reinforced concrete cathode protection device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113216511A (en) * 2021-05-18 2021-08-06 深圳大学 FRP pipe and steel bar combined ICCP-SS seawater sea sand concrete composite beam

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