CN103215601B - The CFRP-reinforced concrete composite structure of tool cathodic protection function and method - Google Patents
The CFRP-reinforced concrete composite structure of tool cathodic protection function and method Download PDFInfo
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- CN103215601B CN103215601B CN201310131251.9A CN201310131251A CN103215601B CN 103215601 B CN103215601 B CN 103215601B CN 201310131251 A CN201310131251 A CN 201310131251A CN 103215601 B CN103215601 B CN 103215601B
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Abstract
The CFRP-reinforced concrete composite structure of the open tool cathodic protection function 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 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, make reinforcing bar, external power source, CFRP section bar forms loop, the control device of series connection one for controlling size of current in described loop, the proofing unit of connection one for detecting the corrosion condition of reinforcing bar in the concrete of skeleton construction body.
Description
Technical field
The present invention relates to the unitized construction field of Steel Concrete, particularly relate to CFRP-reinforced concrete composite structure and the method for tool cathodic protection function.
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, the defect of FRP material self causes the intrusion of external corrosion medium and inside configuration to 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, the new composite structure by adopting the good mechanics of CFRP and electrochemical properties to form a kind of excellent in te pins of durability.
Summary of the invention
In view of the deficiency of aforesaid combination structure durability, the object of the present invention is to provide CFRP-reinforced concrete composite structure and the method for tool cathodic protection function, be intended to solve the problem that the reinforcement corrosion that corrosive medium occurs is rich in existing skeleton construction inside.
Technical scheme of the present invention is as follows:
A working method for the CFRP-reinforced concrete composite structure of tool cathodic protection function, 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 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, reinforcing bar, external power source, CFRP section bar is made to form loop, the control device of series connection one for controlling size of current in described loop, the proofing unit of connection one for detecting the corrosion condition of reinforcing bar in the concrete of skeleton construction body.
The working method of the CFRP-reinforced concrete composite structure of described tool cathodic protection function, wherein, described CFRP section bar is the matrix material mixing different fiber or body material.
A CFRP-reinforced concrete composite structure for tool cathodic protection function, wherein, it comprises the CFRP section bar on the reinforcing area surface being arranged on Steel Concrete device body;
And, Steel Concrete device body and CFRP section bar one-piece casting, at 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, reinforcing bar, external power source, CFRP section bar is made to form loop, the control device of series connection one for controlling size of current in described loop, the proofing unit of connection one for detecting the corrosion condition of reinforcing bar in the concrete of skeleton construction body.
The CFRP-reinforced concrete composite structure of described tool cathodic protection function, 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 tool cathodic protection function, wherein, described external power source is direct supply.
The CFRP-reinforced concrete composite structure of described tool cathodic protection function, wherein, described Steel Concrete device body is cylindrical or rectangular configuration.
The CFRP-reinforced concrete composite structure of described tool cathodic protection function, 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 tool cathodic protection function, wherein, described CFRP section bar is CFRP pipe.
Beneficial effect: the present invention is owing to being applied with cathodic protection to CFRP-reinforced concrete composite structure, by CFRP material, the object that small electric current carrys out implementation structure cathodic protection is applied to concrete reinforcing steel, thus pro-active intervention is rich in the reinforcement corrosion in objectionable impurities concrete, and, the present invention utilizes the structural strengthening of CFRP material and the dual-use function of cathodic 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, simultaneously, the present invention is also by CFRP, concrete and rebar is directly built as a whole, eliminate the operation that cathodic protection structural 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 tool cathodic protection function of the present invention.
Embodiment
The invention provides CFRP-reinforced concrete composite structure and the method for tool cathodic protection function, 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 tool cathodic protection function 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 1 one-piece casting, like this, cathodic protection structure body can be arranged on unitized construction body easily.
CFRP pipe 1 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 loop (being connected by wire 7) of a closed series connection is formed at above-mentioned reinforcing bar 2, described concrete 3 and described CFRP pipe 1 and described external power source 5; a control device 6 that size of current is controlled be connected with described external power source 5 is increased in described loop; this control device 6 reasonably can regulate the size of protective current according to the concrete needs of reinforcing bar protection, thus better regulates and controls whole device.
In order to the better performance to reinforcing bar detects; a proofing unit 8 can be set up at concrete 3; this proofing unit 8 and control device 6 combine and can obtain its maintenance situation of concrete structure easily, are convenient to reasonably protect it according to the present situation of this concrete structure.
Described CFRP section bar is the matrix material etc. mixing different fiber or body material, such as, 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 unitized construction material and supplementary anode; like this unitized construction and cathodic protection two kinds of functions are incorporated in an individual system effectively; even if be rich in the concrete of corrosive medium, also reinforcing bar protected can be made.Reinforcing bar 2-concrete 3-CFRP pipe 1 forms complete electric pathway and successfully can transmit cathodic protection current; in cathodic protection structure body, small electric current is applied 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 protective current or voltage.
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 structural 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 unitized construction 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, carries out being electrically connected (as shown in the figure, being connected by wire 4), and detect the electrical connectivity between reinforcing bar between reinforcing bar.
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 present invention also provides a kind of working method of CFRP-reinforced concrete composite structure of tool cathodic protection function, 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 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, make reinforcing bar, external power source, CFRP section bar forms loop, the control device of series connection one for controlling size of current in described loop, the proofing unit of connection one for detecting the corrosion condition of reinforcing bar between the reinforcing bar and concrete of skeleton construction 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 tool cathodic protection function provided by the invention and method, by CFRP material, the object that small electric current carrys out implementation structure cathodic protection is applied to concrete reinforcing steel, thus pro-active intervention is rich in the reinforcement corrosion in objectionable impurities concrete, and, the present invention utilizes the structural strengthening of CFRP material and the dual-use function of cathodic 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, simultaneously, the present invention is also by CFRP, concrete and rebar is directly built as a whole, 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 (5)
1. a working method for the CFRP-reinforced concrete composite structure of tool cathodic protection function, 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 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, reinforcing bar, external power source, CFRP section bar is made to form loop, the control device of series connection one for controlling size of current in described loop, the proofing unit of connection one for detecting the corrosion condition of reinforcing bar in the concrete of skeleton construction 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;
Described CFRP section bar is CFRP pipe;
By CFRP section bar, the object that small electric current carrys out implementation structure cathodic protection is applied to concrete reinforcing steel, thus pro-active intervention is rich in the reinforcement corrosion in objectionable impurities concrete;
CFRP, concrete and rebar are directly built as a whole, eliminates the operation that cathodic protection structural body is installed, improve operating efficiency.
2. a CFRP-reinforced concrete composite structure for tool cathodic protection function, is characterized in that, it comprises the CFRP section bar on the reinforcing area surface being arranged on Steel Concrete device body;
And, Steel Concrete device body and CFRP section bar one-piece casting, at 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, reinforcing bar, external power source, CFRP section bar is made to form loop, the control device of series connection one for controlling size of current in described loop, the proofing unit of connection one for detecting the corrosion condition of reinforcing bar in the concrete of skeleton construction body;
Described external power source is direct supply;
Described CFRP section bar has the effect simultaneously as reinforcement material and supplementary anode;
Described CFRP section bar is CFRP pipe;
By CFRP section bar, the object that small electric current carrys out implementation structure cathodic protection is applied to concrete reinforcing steel, thus pro-active intervention is rich in the reinforcement corrosion in objectionable impurities concrete;
CFRP, concrete and rebar are directly built as a whole, eliminates the operation that cathodic protection structural body is installed, improve operating efficiency.
3. the CFRP-reinforced concrete composite structure of tool cathodic protection function according to claim 2, is characterized in that, is 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 tool cathodic protection function according to claim 2, is characterized in that, described Steel Concrete device body is cylindrical or rectangular configuration.
5. the CFRP-reinforced concrete composite structure of tool cathodic protection function 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.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310131251.9A CN103215601B (en) | 2013-04-16 | 2013-04-16 | The CFRP-reinforced concrete composite structure of tool cathodic protection function and method |
| US14/253,837 US20140305807A1 (en) | 2013-04-16 | 2014-04-15 | Cathode Protection Method for Reinforced Concrete Structure and Apparatus Therefor |
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| CN201310131251.9A CN103215601B (en) | 2013-04-16 | 2013-04-16 | The CFRP-reinforced concrete composite structure of tool cathodic protection function and method |
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| CN103215601B true CN103215601B (en) | 2015-10-28 |
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| CN110408940B (en) * | 2019-09-12 | 2021-10-15 | 深圳大学 | CFRP-steel concrete combined member cathode protection device and preparation method thereof |
Citations (2)
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| CN101244926A (en) * | 2008-03-28 | 2008-08-20 | 水利部交通部电力工业部南京水利科学研究院 | Steel reinforced concrete sacrificial anode cathodic protection devices in atmospheric environment and method thereof |
| CN203256335U (en) * | 2013-04-16 | 2013-10-30 | 深圳大学 | CFRP (Carbon Fiber Reinforced Plastics)-reinforced concrete composite structure with cathodic protection function |
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| NO316639B1 (en) * | 2002-05-13 | 2004-03-15 | Protector As | Procedure for Cathodic Protection against Reinforcement Corrosion on Moist and Wet Marine Concrete Structures |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101244926A (en) * | 2008-03-28 | 2008-08-20 | 水利部交通部电力工业部南京水利科学研究院 | Steel reinforced concrete sacrificial anode cathodic protection devices in atmospheric environment and method thereof |
| CN203256335U (en) * | 2013-04-16 | 2013-10-30 | 深圳大学 | CFRP (Carbon Fiber Reinforced Plastics)-reinforced concrete composite structure with cathodic protection function |
Non-Patent Citations (2)
| Title |
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| "Active Protection of Fiber-Reinforced Polymer-Wrapped Reinforced Concrete Structures Against Corrosion";S. Gadve et al.;《CORROSION》;20110228;第67卷(第2期);第025002-1-025002-11页 * |
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