CN103205756B - The CFRP-reinforced concrete composite structure of automatic cathode protection and method - Google Patents
The CFRP-reinforced concrete composite structure of automatic cathode protection and method Download PDFInfo
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- CN103205756B CN103205756B CN201310131243.4A CN201310131243A CN103205756B CN 103205756 B CN103205756 B CN 103205756B CN 201310131243 A CN201310131243 A CN 201310131243A CN 103205756 B CN103205756 B CN 103205756B
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Abstract
The CFRP-reinforced concrete composite structure of the open automatic cathode protection of the present invention and method, wherein, described method comprises step: by Steel Concrete device body and CFRP section bar one-piece casting, CFRP section bar is arranged on the reinforcing area surface of Steel Concrete device body, at least one reinforcing bar and the external power source be connected between CFRP section bar for applying electric current to reinforcing bar of Steel Concrete device body.In the present invention, unitized construction body Steel Concrete and CFRP section bar one-piece casting, be connected by between concrete with CFRP section bar at least one reinforcing bar of reinforced concrete body, and have employed the direct supply that can only export constant current or voltage, improve weather resistance and the cost performance of structure.
Description
Technical field
The present invention relates to the unitized construction field of Steel Concrete, particularly relate to new CFRP-reinforced concrete composite structure and the method for the protection of a kind of automatic cathode.
Background technology
In recent years, FRP-concrete combined structure has attracted the concern of scholar more and more.This be due to FRP-concrete combined structure can improve the stressing conditions of structure, construction process adopts FRP as template without the need to extra template and corresponding form removal operation and good weather resistance.The good weather resistance of this unitized construction is mainly owing to have employed the FRP material of excellent in durability, and FRP component to its parcel entirely has the ability stoping harmful environmental material to invade.Above-mentioned structure durability is than more sensitive to material requirements, construction process and Working environment.When having construction wrong, defect and the inside configuration of FRP material self contain enough objectionable impuritiess etc., and the weather resistance of structure just no longer has the advantage of unitized construction.And when the concrete material of the objectionable impurities such as muriate, vitriol is rich in use, as typical marine sand concrete, owing to having possessed each condition accelerating reinforcement corrosion, the time that the reinforcing bar of inside configuration occurs to corrode shifts to an earlier date greatly, destroy the weather resistance of structure, and then need maintenance process simulation that it is done sth. in advance.
As the more common carbon fibre reinforced composite (CFRP) of structural strengthening and unitized construction field, because having, the advantage such as high-strength light, modulus are large, good corrosion resistance is in fact, CFRP is except the mechanical property that people know, because one of main component that it contains-carbon fiber has good electrochemical properties, namely good electroconductibility and the electropotential close to precious metal, CFRP has good electrochemical properties equally.Therefore, applicant's utilize the electrochemical properties of CFRP to be formed impressed current cathodic protection method that a kind of novel supplementary anode is applied to skeleton construction.
Further, mechanical property and the electrochemical properties of CFRP can be utilized, form a kind of new composite structure system simultaneously with reinforcing bar protection and cathodic protection.This means not only to have played its advantage in unitized construction as the CFRP of one of the composition material of structure, will the supplementary anode in impressed current cathodic protection system be played simultaneously.When just applying faint cathodic current to structure from building up, making reinforcing bar in structure be in cathodic polarization state for a long time by the detection and control system in cathodic protection device, thus reaching the effect of protection.Therefore, though inside configuration intrinsic or from corrosive mediums such as the outside chlorions invaded, this new composite structure has the ability of very strong opposing reinforcement corrosion, significantly improves the weather resistance of structure.
But conventional skeleton construction impressed current cathodic protection system is primarily of reinforcing bar, and supplementary anode, direct supply, detection system and Controlling System form.Wherein, the cost of system is mainly distributed in supplementary anode and Controlling System, therefore wants the cost of control cathode protection, and the configuration can developing suitable supplementary anode or improved system is started with.Wherein, suitable supplementary anode realizes by the supplementary anode of research and development containing CFRP.
After applying impressed current cathodic protection to newly-built structure, thinking traditionally need detect the etch state of reinforcing bar, measures the electrochemical parameter of reinforcing bar, as polarized potential, corrosion electric current density etc., and feeds back to Controlling System.When the electrochemical parameter reacting corrosion conditions of reinforcement does not meet the demands, Controlling System can regulate the voltage of direct supply or electric current to export, until guarantee that in structure, reinforcing bar is all subject to enough protections.Which dictates that traditional impressed current cathodic protection needs expensive cost, and daily maintenance and operation expense.
In view of this, prior art needs to improve.
Summary of the invention
In view of the deficiency of aforesaid combination structure durability, the CFRP-reinforced concrete composite structure that the object of the present invention is to provide automatic cathode to protect and method, namely make use of the dual-use function of CFRP as unitized construction material and supplementary anode, and the cathodic protection device that have employed without detection system and Controlling System, be intended to solve inner intrinsic or from the problem being rich in the cathodic protection cost intensive adopted in the corrosion prevention of the skeleton construction of corrosive medium of outside invasion, the CFRP-reinforced concrete composite structure providing automatic cathode to protect and method, eliminate conventional detection and control system, simplify cathodic protection device, improve the cost performance of structure.
Technical scheme of the present invention is as follows:
A working method for the CFRP-reinforced concrete composite structure of automatic cathode protection, wherein, comprises step:
By Steel Concrete device body and CFRP section bar one-piece casting, CFRP section bar is arranged on the reinforcing area surface of Steel Concrete device body, at least one reinforcing bar and the external power source be connected between CFRP section bar for applying electric current to reinforcing bar of Steel Concrete device body.
The working method of the CFRP-reinforced concrete composite structure of described automatic cathode protection, wherein, described CFRP section bar is the matrix material mixing different fiber or body material.
A CFRP-reinforced concrete composite structure for automatic cathode protection, wherein, it comprises the CFRP section bar on the reinforcing area surface being arranged on Steel Concrete device body;
Further, Steel Concrete device body and CFRP section bar one-piece casting, at least one reinforcing bar and the external power source be connected between CFRP section bar for applying electric current to reinforcing bar of Steel Concrete device body.
The CFRP-reinforced concrete composite structure of described automatic cathode protection, wherein, is provided with many reinforcing bars in described Steel Concrete device body, and, be electrically connected between many reinforcing bars.
The CFRP-reinforced concrete composite structure of described automatic cathode protection, wherein, described external power source is direct supply.
The CFRP-reinforced concrete composite structure of described automatic cathode protection, wherein, described Steel Concrete device body is cylindrical or rectangular configuration.
The CFRP-reinforced concrete composite structure of described automatic cathode protection, wherein, described Steel Concrete device body is cylindrical structural, and described steel-bar arrangement has many, and around being arranged on the surrounding of Steel Concrete device body, be electrically connected between adjacent reinforcing bar.
The CFRP-reinforced concrete composite structure of described automatic cathode protection, wherein, described CFRP section bar is CFRP pipe.
Beneficial effect: the present invention is owing to being applied with galvanic protection, by CFRP material, the object that small electric current carrys out implementation structure galvanic protection is applied to concrete reinforcing steel, thus the reinforcement corrosion in pro-active intervention marine sand concrete, and, the present invention utilizes the structural strengthening of CFRP material and the dual-use function of galvanic protection, be applied in the middle of Steel Concrete device, even if when corrosive medium is rich in concrete material inside or outside atmosphere is severe, reinforcing bar also can obtain enough protections, and this device adopts the Constant Direct Current power supply that can export enough sizes, eliminate conventional detection and control system, simplify cathodic protection device, improve the cost performance of structure.Meanwhile, CFRP, concrete and rebar are also directly built as a whole by the present invention, eliminate the operation that cathodic protection structure body is installed, improve operating efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of the CFRP-reinforced concrete composite structure preferred embodiment of automatic cathode of the present invention protection.
Embodiment
The invention provides CFRP-reinforced concrete composite structure and the method for automatic cathode protection, for making object of the present invention, technical scheme and effect clearly, clearly, the present invention is described in more detail below.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Refer to Fig. 1, Fig. 1 is the structural representation of the CFRP-reinforced concrete composite structure preferred embodiment of a kind of automatic cathode protection of the present invention, and as shown in the figure, it comprises two macrostructure bodies: Steel Concrete device body and cathodic protection structure body.
In described Steel Concrete device body, it comprises concrete 3, reinforcing bar 2, CFRP pipe 1, it is inner that reinforcing bar 2 is embedded in concrete 3, CFRP pipe 1 arranges Steel Concrete device body surface, and by being mutually electrically connected between concrete 3 and reinforcing bar 2, at least one reinforcing bar 2 and the external power source 5 be connected between CFRP pipe 1 for applying electric current to reinforcing bar 2 of Steel Concrete device body.In the present invention, Steel Concrete device body and CFRP pipe one-piece casting, like this, cathodic protection structure body can be arranged on Steel Concrete device body easily.
CFRP pipe for mixing the matrix material etc. of different fiber or body material, such as, has mixed the fibre reinforced composites of carbon fiber and glass fibre etc.CFRP pipe can obtain by unitized construction Theoretical Calculation.
The present embodiment takes full advantage of mechanical property and the electrochemical properties of CFRP material; make CFRP material in structural system of the present invention, act as the dual role of reinforcement material and supplementary anode; like this unitized construction and cathodic protection two kinds of functions are incorporated in an individual system effectively; even if in the concrete such as sea sand being rich in corrosive medium, also can reinforcing bar protected be made.Reinforcing bar 2-concrete 3-CFRP pipe 1(is connected by wire 6) form complete electric pathway and successfully can transmit cathodic protection current; in cathodic protection structure body, adopt the power supply that can only export permanent big current or voltage to apply small electric current in the present invention; realize cathodic protection; reinforcing bar current potential is made to drop on Mian Shi district by applying cathodic current to reinforcing bar; and then reach the object of protection reinforcing bar; so described external power source is for providing the direct supply of constant size curtage.
Steel Concrete device body in the present invention can be cylindrical structural or make rectangular beam structures, cylindrical structural such as shown in Fig. 1, in the embodiment shown in fig. 1, many reinforcing bars 2 are around being arranged on concrete 3 around, and be electrically connected between adjacent reinforcing bar 2, by the reinforcing bar 2 of electrical connection, concrete 3, CFRP pipe 1 one-piece casting, just can save the installation procedure of cathodic protection structure body, directly the external power source of cathodic protection structure body is connected on upper Steel Concrete device body, such as any reinforcing bar 2 is connected the negative pole of upper external power source 5, CFRP pipe 1 is connected the positive pole of external power source 5, described cathodic protection structure body can be formed.
In the present invention, should consider mechanical property and the cathodic protection effect of system respectively, respective principle of design and method of calculation can refer to related documents or specification.
Described CFRP pipe 1 serves the effect of reinforcement material and supplementary anode; it must have the performances such as reliable mechanical property, electrochemical properties and weather resistance under long duration load, environmental factors and protective current acting in conjunction, to play the function of unitized construction and cathodic protection simultaneously.
Further, the number of steel bars in described concrete is at least 1, when reinforcing bar number is greater than 1, carry out between reinforcing bar being electrically connected (being connected by wire 4), and the electrical connectivity detected between reinforcing bar, the number of number of steel bars is unrestricted, such as 3,4,5 or other numbers.
In the present invention, the advantage such as high-strength light, modulus are large, good corrosion resistance is in fact because having for carbon fibre reinforced composite (CFRP), CFRP is except the mechanical property that people know, because one of main component that it contains-carbon fiber has good electrochemical properties, namely good electroconductibility and the electropotential close to precious metal, CFRP has good electrochemical properties equally.Therefore, the present invention utilizes the electrochemical properties of CFRP to form a kind of novel supplementary anode to be applied in the impressed current cathodic protection field of skeleton construction.
Further, mechanical property and the electrochemical properties of CFRP can be utilized, form a kind of new composite structure system simultaneously with reinforcing bar protection and cathodic protection.This means not only to have played its advantage in unitized construction as the CFRP of one of the composition material of structure, will the supplementary anode in impressed current cathodic protection system be played simultaneously.The present invention can realize the function of structural strengthening to structure and cathodic protection in an individual system simultaneously, owing to have employed the supplementary anode containing CFRP in the entire system, eliminate the Controlling System in negative electrode guarantor safeguard system and detection system, significantly improve the cost performance of CFRP-reinforced concrete composite structure.
The working method of the CFRP-reinforced concrete composite structure that the present invention also provides a kind of automatic cathode to protect, it comprises step: by Steel Concrete device body and CFRP section bar one-piece casting, CFRP section bar is arranged on the reinforcing area surface of Steel Concrete device body, at least one reinforcing bar and the external power source be connected between CFRP section bar for applying electric current to reinforcing bar of Steel Concrete device body.
Further, described CFRP section bar is the matrix material mixing different fiber or body material.
In sum, the CFRP-reinforced concrete composite structure of a kind of automatic cathode protection provided by the invention and method, by CFRP material, the object that small electric current carrys out implementation structure galvanic protection is applied to concrete reinforcing steel, thus the reinforcement corrosion in pro-active intervention marine sand concrete, and, the present invention utilizes the structural strengthening of CFRP material and the dual-use function of galvanic protection, be applied in the middle of Steel Concrete device, even if when corrosive medium is rich in concrete material inside or outside atmosphere is severe, reinforcing bar also can obtain enough protections, and this device adopts the Constant Direct Current power supply that can export enough sizes, eliminate conventional detection and control system, simplify cathodic protection device, improve the cost performance of structure.Meanwhile, CFRP, concrete and rebar are also directly built as a whole by the present invention, eliminate the operation that cathodic protection structure body is installed, improve operating efficiency.
Should be understood that, application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (6)
1. a working method for the CFRP-reinforced concrete composite structure of automatic cathode protection, is characterized in that, comprise step:
By Steel Concrete device body and CFRP section bar one-piece casting, CFRP section bar is arranged on the reinforcing area surface of Steel Concrete device body, at least one reinforcing bar and the external power source be connected between CFRP section bar for applying electric current to reinforcing bar of Steel Concrete device body;
Described CFRP section bar is the matrix material mixing different fiber or body material;
Described external power source is direct supply;
Described CFRP section bar has the effect simultaneously as reinforcement material and supplementary anode;
By CFRP material, the object that small electric current carrys out implementation structure galvanic protection is applied to concrete reinforcing steel; thus the reinforcement corrosion in pro-active intervention marine sand concrete; even if when corrosive medium is rich in concrete material inside or outside atmosphere is severe; reinforcing bar also can obtain enough protections, and eliminates conventional detection and control system.
2. a CFRP-reinforced concrete composite structure for automatic cathode protection, it is characterized in that, it comprises the CFRP section bar on the reinforcing area surface being arranged on Steel Concrete device body;
Further, Steel Concrete device body and CFRP section bar one-piece casting, at least one reinforcing bar and the external power source be connected between CFRP section bar for applying electric current to reinforcing bar of Steel Concrete device body;
Described external power source is direct supply;
Described CFRP section bar has the effect simultaneously as reinforcement material and supplementary anode;
By CFRP material, the object that small electric current carrys out implementation structure galvanic protection is applied to concrete reinforcing steel; thus the reinforcement corrosion in pro-active intervention marine sand concrete; even if when corrosive medium is rich in concrete material inside or outside atmosphere is severe; reinforcing bar also can obtain enough protections; and this device adopts the Constant Direct Current power supply that can export enough sizes; eliminate conventional detection and control system, simplify cathodic protection device, improve the cost performance of structure.
3. the CFRP-reinforced concrete composite structure of automatic cathode protection according to claim 2, is characterized in that, be provided with many reinforcing bars in described Steel Concrete device body, and, be electrically connected between many reinforcing bars.
4. the CFRP-reinforced concrete composite structure of automatic cathode protection according to claim 2, it is characterized in that, described Steel Concrete device body is cylindrical or rectangular configuration.
5. the CFRP-reinforced concrete composite structure of automatic cathode protection according to claim 4, it is characterized in that, described Steel Concrete device body is cylindrical structural, described steel-bar arrangement has many, and around being arranged on the surrounding of Steel Concrete device body, be electrically connected between adjacent reinforcing bar.
6. the CFRP-reinforced concrete composite structure of automatic cathode protection according to claim 4, is characterized in that, described CFRP section bar is CFRP pipe.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310131243.4A CN103205756B (en) | 2013-04-16 | 2013-04-16 | The CFRP-reinforced concrete composite structure of automatic cathode protection and method |
| US14/253,835 US20140305806A1 (en) | 2013-04-16 | 2014-04-15 | Cathode Protection Method and Apparatus for Reinforced Concrete Structure and Composite Structure and Processing Method for Reinforced Concrete Structure |
| US14/253,837 US20140305807A1 (en) | 2013-04-16 | 2014-04-15 | Cathode Protection Method for Reinforced Concrete Structure and Apparatus Therefor |
| US15/358,064 US10378114B2 (en) | 2013-04-16 | 2016-11-21 | Cathode protection method and apparatus for reinforced concrete structure and composite structure and processing method for reinforced concrete structure |
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| CN201310131243.4A CN103205756B (en) | 2013-04-16 | 2013-04-16 | The CFRP-reinforced concrete composite structure of automatic cathode protection and method |
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| CN103205756A CN103205756A (en) | 2013-07-17 |
| CN103205756B true CN103205756B (en) | 2015-11-18 |
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| CN106637232B (en) * | 2016-12-09 | 2018-11-02 | 北京工业大学 | A kind of improved method of electrochemistry extraction Chloride Ion in Concrete |
| CN109322700B (en) * | 2018-07-30 | 2020-05-22 | 中煤科工集团西安研究院有限公司 | Electromigration device for preventing mine concrete well bore from being damaged by ion erosion |
| CN113089928A (en) * | 2021-04-07 | 2021-07-09 | 浙江大学 | Carbon fiber-FRP-steel bar composite layer grid seawater sea sand concrete laminated slab and manufacturing method thereof |
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| CN203256334U (en) * | 2013-04-16 | 2013-10-30 | 深圳大学 | CFRP (Carbon Fiber Reinforced Plastics)-reinforced concrete combined structure for automatic cathode protection |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3472769B2 (en) * | 2001-10-11 | 2003-12-02 | オリエンタル建設株式会社 | Concrete corrosion protection reinforcement device and corrosion protection reinforcement concrete assembly |
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| CN101306936A (en) * | 2008-07-04 | 2008-11-19 | 同济大学 | Electric conduction mortar material used in reinforced concrete structure and method for preparing same |
| CN102797296A (en) * | 2012-07-13 | 2012-11-28 | 哈尔滨工业大学 | CP anode function and stress self-induction integral intelligent composite material |
| CN203256334U (en) * | 2013-04-16 | 2013-10-30 | 深圳大学 | CFRP (Carbon Fiber Reinforced Plastics)-reinforced concrete combined structure for automatic cathode protection |
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