CN203256337U - Reinforced concrete structure cathode protection device adopting CFRP (Carbon Fiber Reinforced Plastics) anode - Google Patents
Reinforced concrete structure cathode protection device adopting CFRP (Carbon Fiber Reinforced Plastics) anode Download PDFInfo
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- CN203256337U CN203256337U CN 201320191006 CN201320191006U CN203256337U CN 203256337 U CN203256337 U CN 203256337U CN 201320191006 CN201320191006 CN 201320191006 CN 201320191006 U CN201320191006 U CN 201320191006U CN 203256337 U CN203256337 U CN 203256337U
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Abstract
The utility model discloses a reinforced concrete structure cathode protection device adopting a CFRP (Carbon Fiber Reinforced Plastics) anode. The device comprises at least one steel bar planted into concrete, a CFRP sheet material which is taken as a current auxiliary anode material, and a direct-current power supply for supplying power to the device, wherein a bonding layer for connecting the CFRP sheet material with the concrete is arranged between the CFRP sheet material and the concrete. The device disclosed by the utility model adopts the CFRP sheet material as an auxiliary anode of the protection device, so that the cost is greatly reduced while the ideal protection effect is obtained. The device is mounted by bonding the bonding layer with the CFRP sheet material and the concrete, so that the reinforced concrete structure cathode protection device has the characteristics of large covering area and simplicity and convenience in installation.
Description
Technical field
The utility model relates to the impressed current cathodic protection field, relates in particular to the skeleton construction cathodic protector that adopts the CFRP anode.
Background technology
Skeleton construction is topmost structure formation in the civil engineering work, along with the increase of working life and the variation of environment for use, deteriorated and the disabler of skeleton construction is comparatively general and serious, has caused the concern of scientific research scholar to the concrete structure durability problem.Concrete weather resistance refers to that concrete resists the effect of various destructive factors under actual service conditions, keeps for a long time the ability of intensity and outward appearance integrity.
From the angle of materialogy, the deteriorated main reason of reinforced concrete structure durability is the corrosion of inner reinforcing bar.Under normal circumstances, reinforcing bar is about in 13 the inside concrete hole solution at pH value and can forms passive film.But when the concrete that passes porous when the external corrosion medium entered into rebar surface, passive film was destroyed and is lost protection to reinforcing bar, thereby caused the corrosion of reinforcing bar.
At present, impressed current cathodic protection technology has been proved to be one of effective means.The impressed current cathodic protection technology is based on PH-potential ph diagram ph principle and puts forward, and thinks the reinforcing bar current potential to be dropped on exempt from the erosion district by apply cathodic current to reinforcing bar, and then reaches the purpose of protection reinforcing bar.Supplementary anode is the important component part of impressed current cathodic protection system, has played cathodic current is passed to concrete effect from external circuit.The process of delivered current is to discharge electronics by the electrochemical reaction that supplementary anode surface occurs to finish, and this requires, and supplementary anode must possess that polarization is little, current drainage large, difficult consumption and the characteristics of long term operation stable performance etc.Up to now, scientific research scholar's research and developed various supplementary anodes, such as the ferrosilicon anode, metallize layer anode, baried type anode and mixed metal oxide titanium anode etc.Wherein at present effect ideal what be most widely used is mixed metal oxide titanium anode, but its expensive price has limited its promotion and application greatly.
In view of this, prior art is demanded urgently improving and development.
As the most common carbon fibre reinforced composite in structural strengthening field (CFRP) because having the advantages such as high-strength light, modulus are large, good corrosion resistance, become a kind of structural strengthening material of maturation.In fact; CFRP is except the mechanical property that people know; because one of its main component that contains-carbon fiber has good electrochemical properties; be good electroconductibility and near the electropotential of precious metal; CFRP has good electrochemical properties equally; therefore, the electrochemical properties of CFRP forms the impressed current cathodic protection method that a kind of novel supplementary anode may be used on skeleton construction.
The utility model content
In view of above-mentioned the deficiencies in the prior art; the purpose of this utility model is to provide a kind of skeleton construction cathodic protector of the CFRP of employing anode; be intended to solve in the prior art carrying out skeleton construction and cause using limited deficiency when carrying out impressed current cathodic protection because supplementary anode is expensive; a kind of novel auxiliary anode material is provided; in the ideal effect that reaches the protection concrete structure, reduced cost.
The technical solution of the utility model is as follows:
Adopt the skeleton construction cathodic protector of CFRP anode, wherein, this device comprises:
Be used for being installed in the reinforcing bar in the concrete;
Be used for being installed in the concrete and as the CFRP sheet material of electric current auxiliary anode material,
An and direct supply of powering for described device;
Described CFRP sheet material is by concrete and described spacing of reinforcement setting;
The CFRP sheet material is connected with the positive pole of described direct supply, and described reinforcing bar is connected with the negative pole of described direct supply; And a side corresponding with described reinforcing bar is provided with the tack coat with conducting function on described CFRP sheet material; Described reinforcing bar links to each other with described tack coat by described concrete with described CFRP sheet material, and forms a loop line with described direct supply;
Described device also comprises the Controlling System that a size of current in the described device that is connected with described direct supply is controlled;
Described device also comprise one with the described reinforcing bar proofing unit that corrosion condition to described reinforcing bar detects that links to each other with concrete.
The skeleton construction cathodic protector of described employing CFRP anode, wherein, the number of steel bars in the described concrete is at least 1, when the reinforcing bar number greater than 1 the time, be electrically connected between the reinforcing bar, and detect electrical connectivity between the reinforcing bar.
The skeleton construction cathodic protector of described employing CFRP anode, wherein, described tack coat is the epoxy resin glue that has added conductive particle.
Beneficial effect: it is the skeleton construction impressed current catholic protection device of supplementary anode that the utility model provides a kind of CFRP of employing; described device adopts CFRP sheet material as supplementary anode; not only can obtain desirable protection effect; and with prior art in use the mixed metal oxide titanium to compare can greatly to reduce the protection cost; this device adopts tack coat that the total of device is fixed up, and has the advantages such as the large and distribution of current of area coverage is even.
Description of drawings
Fig. 1 is the structural representation of the skeleton construction cathodic protector of employing CFRP anode of the present utility model.
Fig. 2 is the cross-sectional structure synoptic diagram of the skeleton construction cathodic protector of employing CFRP anode of the present utility model.
Fig. 3 is the skeleton construction cathode protecting process most preferred embodiment flow chart of steps of employing CFRP anode of the present utility model.
Embodiment
The utility model provides a kind of skeleton construction impressed current catholic protection device, and is clearer, clear and definite for making the purpose of this utility model, technical scheme and effect, below the utility model further described.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
As shown in Figure 1; the utility model provides the skeleton construction cathodic protector that adopts the CFRP anode; be the structural representation of the skeleton construction cathodic protector of employing CFRP anode of the present utility model as described in Figure 1, this device is comprised of following part:
The reinforcing bar 4 that described device is protected in advance, contain described reinforcing bar concrete 3, be used for CFRP sheet material 1, a direct supply 5 of powering for described device as the electric current auxiliary anode material; Be provided with for the tack coat 2 that both are linked together between described CFRP sheet material 1 and the described concrete 3.
Reinforcing bar 4 is embedded in the concrete 3, and the device that the utility model provides is used for it is protected.Be provided with a CFRP sheet material 1 in the concrete middle and upper part, described CFRP sheet material 1 surface is adhesive with tack coat 2, and described tack coat 2 itself has enough intensity, and it links to each other CFRP sheet material 1 with concrete 3, can strengthen the integrally-built intensity of described device.
Described reinforcing bar 4 links to each other with anodal with the negative pole of a direct current power supply 5 respectively with described CFRP sheet material 1, and this direct supply 5 provides described protector required electric current.
Because being connected with concrete by described tack coat 2, described reinforcing bar and described CFRP sheet material 1 be connected, reinforcing bar 4 is connected with described direct supply 5 with described CFRP sheet material 1, and therefore last described reinforcing bar 4, described concrete 3, described tack coat 2 and described CFRP sheet material 1 and described direct supply 5 form a closed series loop and form a complete closed series loop.
In the closed series loop of above-mentioned reinforcing bar 4, described concrete 3, described tack coat 2 and described CFRP sheet material 1 and described direct supply 5 formation, increase the Controlling System 6 that the size of current in the described device that is connected with described direct supply is controlled; the size that this Controlling System 6 can reasonably be regulated protective current according to the concrete needs of reinforcing bar protection, thus better whole device is regulated and control.
For better performance to reinforcing bar detects; between reinforcing bar and concrete, set up a proofing unit 8; this proofing unit 8 and Controlling System 6 combine and can obtain easily its maintenance situation of concrete structure, are convenient to according to the present situation of this concrete structure it reasonably be protected.
Research finds that the carbon fibre reinforced composite (CFRP) that is widely used at present the structural strengthening field not only possesses good mechanical property; and electrically good as the carbon fiber guiding of main component; electropotential is near the electrochemical properties of precious metal; and described CFRP sheet material has electric action; be used for transmitting the cathodic current that this concrete structure is protected; the CFRP material also has corrosion-resistant advantage, has good resistibility for the electrochemical reaction product that produces on its surface.
In addition, CFRP is that supplementary anode refers to and utilizes the CFRP electrochemical properties to be the supplementary anode of foundational development, comprise such as by mixing matrix material that different fibers or body material produce etc., such as the fibre reinforced composites that mixed carbon fiber and glass fibre etc.Because the CFRP pattern is flexible; there is the cloth material that sheet material is also arranged; it can present different section forms; different shapes, different sites applicable to structure; in order to guarantee to transmit uniformly cathodic protection current as the CFRP material of electric current auxiliary anode material; what can expect is; in specific embodiment, can use CFRP sheet material and CFRP cloth; this the best is implemented choice for use CFRP sheet material; and the CFRP material normally is tiled in the structural region that needs protection as supplementary anode; its area coverage is large, for the positive effect of being evenly distributed with of protective current.
In concrete the application, described tack coat need to satisfy and has conductivity and the high characteristic of intensity own, the CFRP sheet material firmly can be fixed on concrete surface, such as the inorganic coagulation material take cement paste as representative or added the epoxy resin glue of the conductive particles such as powdered graphite.Preferably, use cement paste as tack coat in the utility model, itself and CFRP sheet surface glutinous company mutually not only self have very high intensity, and it can improve the stability of whole concrete structure with CFRP sheet material and concrete binding together.
Studies show that thickness the best of described tack coat is about 3mm.
Described concrete is continuous ionogen, then should in time use the cement paste cement paste to fill up if there is the crack, thereby cathodic protection current can be well transmitted in the complete loop of guaranteeing reinforcing bar-concrete-cement paste-CFRP sheet material composition.
What can expect is, the utility model for skeleton construction be not limited only to as shown in Figure 1 rectangular beam structure, also can be used for the various skeleton construction shapes that the protection needs are arranged, such as concrete circular post etc.
The device of a kind of skeleton construction impressed current cathodic protection that the utility model provides, this device comprise the reinforcing bar of protecting in advance, the concrete of imbedding described reinforcing bar, are used for CFRP sheet material, a direct supply of powering for described device as the electric current auxiliary anode material; Be provided with for the tack coat that both are linked together between described CFRP sheet material and the described concrete; This device is owing to adopt the CFRP sheet material as the supplementary anode of protector; can when obtaining desirable protection effect, greatly reduce cost; and because the tack coat itself that uses has preferably intensity; it is connected with concrete with the CFRP sheet material, has improved the firm of described protection constructional device.
Be illustrated in figure 2 as the embodiment one cross-sectional structure synoptic diagram of the method for a kind of skeleton construction impressed current cathodic protection that the utility model provides; 1 is CFRP sheet material as supplementary anode among the figure; concrete 3 is connected by tack coat 2 with CFRP sheet material 1, and the reinforcing bar 4 in 8 pairs of Transducers Embedded in Concretes 3 of proofing unit detects in real time.Because in the application of reality; not just one of the number of steel bars that generally needs protection, as among Fig. 3 take the reinforcing bar number that needs protection as two as example, when reinforcing bar is protected; need to will be electrically connected 9 between two reinforcing bars 4, and detect the electrical connectivity between the reinforcing bar.
As described in Figure 3, the utility model provides the skeleton construction cathode protecting process that adopts the CFRP anode, and wherein, the method may further comprise the steps:
H1, remove in the protection zone loose concrete, and in concrete, occur inserting the matrix material with conducting function in the zone in crack, form tack coat.
Loop in order to ensure last installation can be good at carrying out the transmission of cathodic protection current; therefore before installing; need to remove first concrete loose in the protection zone; the tack coat that can conduct electricity is inserted in the zone that the crack concrete occurred; make it to become continuous ionogen; so not only guaranteed the smooth circulation of loop current, and tack coat itself has very strong hardness, can well increase the steadiness of described current protective device.
H2, in concrete, implant the CFRP sheet material of impressed current auxiliary anode material, and with this CFRP sheet material and the setting of reinforcement in concrete interval.
The tack coat that in this step matrix material is formed covers on the surface of CFRP sheet material and the corresponding side of described reinforcing bar, is convenient to by concrete the cathodic current on the reinforcing bar is delivered on the CFRP sheet material.
H3, tack coat is covered on the described CFRP sheet surface of a corresponding side with reinforcing bar, and pressurizing binding layer firmly, make itself and CFRP sheet material and concrete binding together;
Bad for fear of contacting with the CFRP sheet surface because of tack coat, cause cathodic current can better not transmit smoothly or uniformly, therefore tack coat need to be pressurizeed makes its even thickness.
H4, reinforcing bar and CFRP sheet material are linked to each other with anodal with the negative pole of direct supply respectively, described reinforcing bar, concrete, CFRP sheet material and direct supply form the series loop of closure.
Reinforcing bar is connected with the negative pole of direct supply, and the CFRP sheet material is connected with the positive pole of direct supply.Because reinforcing bar links to each other with the tack coat of CFRP sheet material by conduction, therefore described reinforcing bar, concrete, CFRP sheet material and direct supply form closed series loop.
H5: series connection one is used for the proofing unit that the performance of control device that the size of current of skeleton construction impressed current catholic protection device is controlled and a pair of described reinforcing bar detects in described series loop.
Described proofing unit feeds back to Controlling System with the corrosion condition of the reinforcing bar of test, and whether decision needs to regulate the size of current in the skeleton construction impressed current catholic protection device.
The method of the impressed current cathodic protection that the utility model provides; because adopt the CFRP sheet material as supplementary anode, use for reference the construction technology of CFRP ruggedized construction, with tack coat the CFRP sheet material is bonded in concrete surface; need not main equipment, have the easy-to-install benefit.
Also comprise among the above-mentioned steps H5: be electrically connected between the reinforcing bar that needs are protected, and the electrical connectivity between the test reinforcing bar.
Method and the device of a kind of skeleton construction impressed current cathodic protection that the utility model provides; this device is by using the cheap CFRP of the mixed metal oxide titanium that uses in the cost ratio prior art as supplementary anode; and use and have electroconductibility and larger tack coat connecting reinforcement and the CFRP of hardness own; thereby can when obtaining desirable protection effect, protection cost and the steadiness that has strengthened protector have been reduced.Described installation method does not need main equipment because the tack coat that uses directly is bonded in the surface of concrete and CFRP, and simple installation is easy to implement.
Should be understood that; application of the present utility model is not limited to above-mentioned giving an example; for those of ordinary skills, can be improved according to the above description or conversion, all these improvement and conversion all should belong to the protection domain of the utility model claims.
Claims (3)
1. adopt the skeleton construction cathodic protector of CFRP anode, it is characterized in that this device comprises:
Be used for being installed in the reinforcing bar in the concrete;
Be used for being installed in the concrete and as the CFRP sheet material of electric current auxiliary anode material;
An and direct supply of powering for described device;
Described CFRP sheet material is by concrete and described spacing of reinforcement setting;
The CFRP sheet material is connected with the positive pole of described direct supply, and described reinforcing bar is connected with the negative pole of described direct supply; And a side corresponding with described reinforcing bar is provided with the tack coat with conducting function on described CFRP sheet material; Described reinforcing bar links to each other with described tack coat by described concrete with described CFRP sheet material, and forms a loop line with described direct supply;
Described device also comprises the Controlling System that a size of current in the described device that is connected with described direct supply is controlled;
Described device also comprise one with the described reinforcing bar proofing unit that corrosion condition to described reinforcing bar detects that links to each other with concrete.
2. the skeleton construction cathodic protector of described employing CFRP anode according to claim 1; it is characterized in that the number of steel bars in the described concrete is at least 1, when the reinforcing bar number greater than 1 the time; be electrically connected between the reinforcing bar, and the electrical connectivity between the detection reinforcing bar.
3. the skeleton construction cathodic protector of described employing CFRP anode according to claim 1 is characterized in that described tack coat is cement paste or the epoxy resin glue that has added conductive particle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320191006 CN203256337U (en) | 2013-04-16 | 2013-04-16 | Reinforced concrete structure cathode protection device adopting CFRP (Carbon Fiber Reinforced Plastics) anode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320191006 CN203256337U (en) | 2013-04-16 | 2013-04-16 | Reinforced concrete structure cathode protection device adopting CFRP (Carbon Fiber Reinforced Plastics) anode |
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| CN203256337U true CN203256337U (en) | 2013-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320191006 Expired - Lifetime CN203256337U (en) | 2013-04-16 | 2013-04-16 | Reinforced concrete structure cathode protection device adopting CFRP (Carbon Fiber Reinforced Plastics) anode |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103205757A (en) * | 2013-04-16 | 2013-07-17 | 深圳大学 | Cathode protection method and cathode protection device for reinforced concrete adopting CFRP (carbon fibre reinforced plastics) anode |
| CN106481092A (en) * | 2016-12-08 | 2017-03-08 | 广东工业大学 | A kind of anti-corrosion bracing means of pre-stressed carbon fiber reinforced steel concrete |
| CN106499213A (en) * | 2016-12-08 | 2017-03-15 | 广东工业大学 | Armored concrete anti-corrosion bracing means |
| CN107806211A (en) * | 2017-10-08 | 2018-03-16 | 李梦媛 | A kind of anti-corrosion adapter sleeve of building concrete reinforcing bar node |
| CN109322700A (en) * | 2018-07-30 | 2019-02-12 | 中煤科工集团西安研究院有限公司 | Electrotransport devices for preventing mine concrete pit shaft from being destroyed by ion erosion |
-
2013
- 2013-04-16 CN CN 201320191006 patent/CN203256337U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103205757A (en) * | 2013-04-16 | 2013-07-17 | 深圳大学 | Cathode protection method and cathode protection device for reinforced concrete adopting CFRP (carbon fibre reinforced plastics) anode |
| CN103205757B (en) * | 2013-04-16 | 2016-01-20 | 深圳大学 | Adopt skeleton construction cathode protecting process and the device of CFRP anode |
| CN106481092A (en) * | 2016-12-08 | 2017-03-08 | 广东工业大学 | A kind of anti-corrosion bracing means of pre-stressed carbon fiber reinforced steel concrete |
| CN106499213A (en) * | 2016-12-08 | 2017-03-15 | 广东工业大学 | Armored concrete anti-corrosion bracing means |
| CN107806211A (en) * | 2017-10-08 | 2018-03-16 | 李梦媛 | A kind of anti-corrosion adapter sleeve of building concrete reinforcing bar node |
| CN109322700A (en) * | 2018-07-30 | 2019-02-12 | 中煤科工集团西安研究院有限公司 | Electrotransport devices for preventing mine concrete pit shaft from being destroyed by ion erosion |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131030 |