CN103205755B - CFRP is adopted to embed protecting reinforced concrete cathode method and the device of anode - Google Patents
CFRP is adopted to embed protecting reinforced concrete cathode method and the device of anode Download PDFInfo
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- CN103205755B CN103205755B CN201310131212.9A CN201310131212A CN103205755B CN 103205755 B CN103205755 B CN 103205755B CN 201310131212 A CN201310131212 A CN 201310131212A CN 103205755 B CN103205755 B CN 103205755B
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Abstract
The invention discloses a kind of the protecting reinforced concrete cathode method and the device that adopt CFRP embedding anode, described method comprises step: offer groove in position, described protection zone by specified dimension; On the surface, protection zone of skeleton construction body, CFRP sheet material is set, described CFRP sheet material comprise with the ribbed stiffener of groove adaptation and with the stiffener being fixed on protection zone internal surface; The side surface that ribbed stiffener matrix material being spread upon described CFRP sheet material is connected with concrete groove and between stiffener and concrete, embeds ribbed stiffener and concrete groove and stiffener with concrete and is connected.This device becomes stiffening rib structure to be embedded in concrete the distance reduced between CFRP sheet material and reinforcing bar owing to adopting CFRP sheet material design; reduce resistance between the two; thus be conducive to the continuous uniform distribution of protective current in concrete structure, better protected effect can be reached.
Description
Technical field
The present invention relates to material of construction structural defence field, particularly relate to the protecting reinforced concrete cathode method and the device that adopt CFRP to embed anode.
Background technology
The main reason of reinforced concrete structure durability deterioration is the corrosion of inner reinforcing bar.At present, impressed current cathodic protection technology has been proved to be one of most effective means.Impressed current cathodic protection technology puts forward based on PH-potential ph diagram ph principle, thinks by applying cathodic current to reinforcing bar and makes reinforcing bar current potential drop on Mian Shi district, and then reaches the object of protection reinforcing bar.
Supplementary anode is the important component part of impressed current cathodic protection system.Existing supplementary anode is laid in the surface of structure often in flakes, or is fixed on the groove that structure offers in advance dispersedly, and this factor such as the region with structural defence and concrete resistance is related.The former due to supplementary anode be that then supplementary anode has larger area coverage compared with the bedding of large regions at body structure surface, for electric current continuous, to be uniformly distributed be favourable, but is limited by the uneven impact of concrete resistance, as titanium net anode; And the latter is fixed in the groove of structure with the form of dispersion, although the area coverage of anode is little, mean the continuity of electric current and homogeneity all poor, which shorten itself and the distance of reinforcing bar in concrete, reduce concrete resistance between the two, as baried type anode.In addition, concrete is a kind of heterogeneous material, the large and skewness of its resistivity with, be subject to the impact of environmental factors.
In prior art; from the method that the angle of material is reinforced skeleton construction; steel plate and fiber is such as adopted to increase polymkeric substance (FiberReinforcedPolymer; be called for short FRP) or the structural reinforcement material such as carbon fibre reinforced composite (CFRP) in structural strengthening field come structural strengthening; but in the defect of construction technology, error, structure military service process, the deterioration of reinforcement material and loss all can destroy the protective layer that reinforcement material is formed, and cause concrete structure to occur anticaustic.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
In view of the deficiency of above-mentioned existing supplementary anode application; the object of the present invention is to provide a kind of the protecting reinforced concrete cathode method and the device that adopt CFRP embedding anode; be intended to solve existing supplementary anode and encounter large and continuous, the equally distributed disadvantageous effect that is uneven and electric current of concrete resistivity in the application; the protecting reinforced concrete cathode method and the device that adopt CFRP to embed anode are provided; while being intended to reach the ideal effect of protection concrete structure, reduce protection cost.
Technical scheme of the present invention is as follows:
Adopt CFRP to embed the protecting reinforced concrete cathode method of anode, wherein, comprise step:
A, offer a groove in the position, protection zone of skeleton construction by specified dimension, and remove the dust in described groove;
B, CFRP sheet material is set on the surface, protection zone of skeleton construction body, described CFRP sheet material comprise with the ribbed stiffener of described groove shapes adaptation and be fixedly connected with described ribbed stiffener and be fixed on the stiffener of described skeleton construction main body protection region internal surface;
The surface that C, the ribbed stiffener matrix material with conducting function being spread upon described CFRP sheet material are connected with concrete groove and between stiffener and concrete, for being connected described ribbed stiffener with concrete with concrete groove and stiffener;
D, the positive pole of CFRP sheet material with a direct supply to be connected, the negative pole of reinforcing bar with described direct supply is connected; Described reinforcing bar and described matrix material, form a closed galvanic circle by concrete and described CFRP sheet material and described direct supply.
Described employing CFRP embeds the protecting reinforced concrete cathode method of anode, wherein, comprises before described steps A:
A0, in the protection zone of skeleton construction body, cutter removes the concrete that loosens, and polishes flat.
Described employing CFRP embeds the protecting reinforced concrete cathode method of anode, wherein, also comprises step between described step B and C:
B1, region irregular in concrete is poured into matrix material again, and extrude, the air be mixed in matrix material region is extruded, and removes unnecessary matrix material.
Described employing CFRP embeds the protecting reinforced concrete cathode method of anode, wherein, also comprises step in described step C:
C1, all reinforcing bars in protection zone to be electrically connected, and to check the electrical connectivity between each reinforcing bar.
Described employing CFRP embeds the protecting reinforced concrete cathode method of anode, wherein, also comprises step between described step C and D:
D0, check reinforcing bar, electrical connectivity between concrete and CFRP sheet material.
Described employing CFRP embeds the protecting reinforced concrete cathode method of anode, wherein, described matrix material be cement paste or with the addition of conductive particle epoxy resin glue.
Adopt CFRP to embed the protecting reinforced concrete cathode device of anode, for be arranged on there is bar construction skeleton construction body in, wherein, it comprises one for embedding with the groove offered on skeleton construction body the CFRP sheet material installed;
Described CFRP sheet material comprise with the ribbed stiffener of described groove shapes adaptation and be fixedly connected with described ribbed stiffener and stiffener for being fixed on described skeleton construction main body protection region internal surface;
The side surface be connected with concrete groove at the ribbed stiffener of described CFRP sheet material and between stiffener and concrete, is provided with the bonding material layer with conducting function;
Described protector also comprises a direct supply; the positive pole of described direct supply is connected with described CFRP sheet material; the negative pole of described direct power supply is connected to the reinforcing bar in skeleton construction body; described reinforcing bar and described matrix material, form a closed galvanic circle by concrete and described CFRP sheet material and described direct supply.
Described employing CFRP embeds the protecting reinforced concrete cathode device of anode, and wherein, described CFRP sheet material is a CFRP plate.
Described employing CFRP embeds the protecting reinforced concrete cathode device of anode, and wherein, all reinforcing bars in protection zone are electrically connected.
Described employing CFRP embeds the protecting reinforced concrete cathode device of anode, and wherein, described matrix material is cement paste or the epoxy resin glue that with the addition of conductive particle.
Beneficial effect: the invention provides a kind of the protecting reinforced concrete cathode method and the device that adopt CFRP embedding anode; described device adopts CFRP sheet material as supplementary anode; not only can obtain desirable protected effect; and with use in prior art compared with mixed metal oxide titanium and can greatly reduce protection cost; adopt CFRP sheet material to be that ribbed stiffener is connected with concrete groove structure is embedded, thus be conducive to the resistance of reduction protection zone inner concrete and reach being uniformly distributed of protective current.
Accompanying drawing explanation
Fig. 1 is the structural representation that employing CFRP of the present invention embeds the protecting reinforced concrete cathode device of anode.
Fig. 2 is the schema that employing CFRP of the present invention embeds the protecting reinforced concrete cathode method of anode.
Embodiment
The invention provides a kind of guard method and device of skeleton construction, 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.
Figure 1 shows that employing CFRP provided by the invention embeds the structural representation of the protecting reinforced concrete cathode device of anode, as described in Figure 1, this device forms by with lower part:
Be 2 for the quantity of reinforcing bar in reinforcing bar 4(Fig. 1 in several Transducers Embedded in Concretes 3), be electrically connected by wire between described reinforcing bar; One CFRP sheet material 1 and the groove 31 offered on described skeleton construction body; The shape size of described groove 31 and concrete needed for the number offered determine according to the needs of galvanic protection.
Described CFRP sheet material 1 comprise with the ribbed stiffener 11 of described groove shapes adaptation and be fixedly connected with described ribbed stiffener 11 and be fixed on the stiffener 12 of described skeleton construction main body protection region internal surface.
The CFRP sheet material 1 be made up of ribbed stiffener 11 and stiffener 12 is connected with concrete groove 31 and concrete 3 surface by matrix material 2; thus reduce the distance of the reinforcing bar 4 in CFRP sheet material 1 and concrete 3; reduce resistance between the two, thus protective current can be made more even.
In a particular application, described matrix material demand fulfillment has conduction and CFRP stably can be fixed on performance on concrete surface, such as, be that inorganic coagulation material or the epoxy resin glue that with the addition of the conductive particles such as powdered graphite of representative all can meet above-mentioned requirements with cement paste.Preferably; use cement paste in the present invention; it is adhered mutually with CFRP sheet surface; not only self there is very high intensity; its by CFRP sheet material together with concrete binding; the stability that can improve whole concrete structure adopts the protecting reinforced concrete cathode method of CFRP embedding anode and device to adopt the protecting reinforced concrete cathode method of CFRP embedding anode and device to adopt CFRP to embed protecting reinforced concrete cathode method and the device of anode, and thickness the best of described matrix material is about 3mm.
Described CFRP sheet material 1 is connected with the positive pole of an external direct supply (not shown in FIG.), reinforcing bar 4 is connected with the negative pole of described direct supply, described reinforcing bar 4 is connected with described matrix material 2 by described concrete 3 with described CFRP sheet material 1, and forms a closed galvanic circle with described direct supply.
CFRP material is owing to not only possessing good mechanical property, and it is electrically good as the carbon fiber guiding of main component, electropotential is close to the electrochemical properties of precious metal, therefore in said apparatus, adopt CFRP sheet material can utilize its mechanical property and electrochemical properties fully as cathodic current supplementary anode, the technique effect of galvanic protection is given while considering structural reinforcing, and use the cost ratio mixed metal oxide Ni―Ti anode of CFRP material low, therefore protection cost has been saved, and CFRP material types is flexible, different section forms can be presented, be easy to use in the application.
Preferably, when the matrix material adopted is cement paste, its surface contact with CFRP sheet material should be met well, and advise that its thickness is about 3mm.
In said apparatus; the difference of the quantity of reinforcing bar protection zone as required may be a lot of; need all reinforcing bars to be electrically connected by wire, and detect the electrical connectivity between them, ensure that the reinforcing bar in concrete structure region can be protected.
It is understood, however, that concrete structure is not limited in the rectangular beam structures shown in Fig. 1, can also be other structural shapes, as concrete circular cylindricality etc.
Embed the protecting reinforced concrete cathode device of anode based on above-mentioned employing CFRP, present invention also offers the protecting reinforced concrete cathode method adopting CFRP to embed anode, be illustrated in figure 2 the schema that the invention provides shown method, it comprises the following steps:
S1, offer groove in position, described protection zone by specified dimension, and remove the dust in described groove.
Continuous print ionogen is become before this step in order to make the concrete in protection zone have; therefore cutter in the protection zone of skeleton construction body is needed to remove the concrete loosened; expose solid part; polish flat and clean out; and irregular region pours into matrix material again in concrete; and extrude, the air be mixed in matrix material region is extruded, and removes unnecessary matrix material.
S2, CFRP sheet material is set on the surface, protection zone of skeleton construction body, described CFRP sheet material comprise with the ribbed stiffener of groove shapes adaptation and be fixedly connected with described ribbed stiffener and be fixed on the stiffener of described skeleton construction main body protection region internal surface.
One CFRP sheet material is set in concrete; this CFRP sheet material comprises a ribbed stiffener and a stiffener, and both are fixedly linked, and described ribbed stiffener is connected with the groove dug out is embedded; described stiffener is a CFRP plate, is fixed on the internal surface of concrete structure protection zone.
The side surface that S3, the ribbed stiffener that the matrix material with conducting function is spread upon described CFRP sheet material are connected with concrete groove, and between stiffener and concrete, by described ribbed stiffener and concrete groove, and stiffener embeds with concrete and is connected.
Be coated with between CFRP sheet material and concrete and spread matrix material, namely at described ribbed stiffener and groove and add matrix material between stiffener and concrete, make ribbed stiffener and groove and be sticked together between stiffener and concrete.
S4, be connected by the positive pole of CFRP sheet material with a direct supply, described reinforcing bar is connected with the negative pole of described direct supply; Described reinforcing bar is connected by described concrete electric with described matrix material, and forms a closed galvanic circle with described CFRP sheet material and described direct supply.
If the number of steel bars in this step in protection zone is one incessantly; the all reinforcing bars in protection zone are then needed to be electrically connected; and check the electrical connectivity between reinforcing bar; and need to check reinforcing bar, electrical connectivity between concrete and CFRP sheet material, guarantee that whole circuit can transmit cathodic protection current smoothly.
Described matrix material demand fulfillment has conducting function and self has very strong intensity, preferably, matrix material used in present method is cement paste, in specific implementation process, needing the crack with occurring in cement paste fill concrete, ensureing that concrete is continuous print ionogen.
Employing CFRP provided by the invention embeds protecting reinforced concrete cathode method and the device of anode, this device by the CFRP material that uses the mixed metal oxide titanium that uses in cost ratio prior art cheap as supplementary anode, and use and there is electroconductibility and the larger matrix material connecting reinforcement of hardness own and CFRP material, thus can while obtaining desirable protected effect, reduce protection cost and the steadiness enhancing protector, and adopt type cross section with ribbing, reduce the distance between CFRP sheet material and reinforcing bar, reduce resistance between the two, thus being advantageously uniformly distributed of protective current in concrete structure, thus better protected effect can be reached.
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. adopt CFRP to embed the protecting reinforced concrete cathode method of anode, it is characterized in that, comprise step:
A, offer a groove in the position, protection zone of skeleton construction by specified dimension, and remove the dust in described groove;
B, CFRP sheet material is set on the surface, protection zone of skeleton construction body, described CFRP sheet material comprise with the ribbed stiffener of described groove shapes adaptation and be fixedly connected with described ribbed stiffener and be fixed on the stiffener of described skeleton construction main body protection region internal surface;
The surface that C, the ribbed stiffener matrix material with conducting function being spread upon described CFRP sheet material are connected with concrete groove and between stiffener and concrete, for being connected described ribbed stiffener with concrete with concrete groove and stiffener;
D, the positive pole of CFRP sheet material with a direct supply to be connected, the negative pole of reinforcing bar with described direct supply is connected; Described reinforcing bar and described matrix material, form a closed galvanic circle by concrete and described CFRP sheet material and described direct supply;
Also step is comprised between described step C and D:
D0, check reinforcing bar, electrical connectivity between concrete and CFRP sheet material;
Described matrix material is cement paste; The thickness of described cement paste is 3mm;
Comprise before described steps A:
A0, in the protection zone of skeleton construction body, cutter removes the concrete that loosens, and polishes flat;
Also step is comprised between described step B and C:
B1, region irregular in concrete is poured into matrix material again, and extrude, the air be mixed in matrix material region is extruded, and removes unnecessary matrix material.
2. adopt CFRP to embed the protecting reinforced concrete cathode method of anode according to claim 1, it is characterized in that, in described step C, also comprise step:
C1, all reinforcing bars in protection zone to be electrically connected, and to check the electrical connectivity between each reinforcing bar.
3. adopt CFRP to embed the protecting reinforced concrete cathode device of anode, for be arranged on there is bar construction skeleton construction body in, it is characterized in that, it comprises one for embedding with the groove offered on skeleton construction body the CFRP sheet material installed;
Described CFRP sheet material comprise with the ribbed stiffener of described groove shapes adaptation and be fixedly connected with described ribbed stiffener and stiffener for being fixed on described skeleton construction main body protection region internal surface;
The side surface be connected with concrete groove at the ribbed stiffener of described CFRP sheet material and between stiffener and concrete, is provided with the bonding material layer with conducting function; The CFRP sheet material be made up of ribbed stiffener and stiffener is connected with concrete groove and concrete surface by matrix material;
Described protector also comprises a direct supply, the positive pole of described direct supply is connected with described CFRP sheet material, the negative pole of described direct power supply is connected to the reinforcing bar in skeleton construction body, described reinforcing bar and described matrix material, form a closed galvanic circle by concrete and described CFRP sheet material and described direct supply;
Described matrix material is cement paste; The thickness of described cement paste is 3mm.
4. adopt CFRP to embed the protecting reinforced concrete cathode device of anode according to claim 3, it is characterized in that, described CFRP sheet material is a CFRP plate.
5. adopt CFRP to embed the protecting reinforced concrete cathode device of anode according to claim 3, it is characterized in that, all reinforcing bars in protection zone are electrically connected.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310131212.9A CN103205755B (en) | 2013-04-16 | 2013-04-16 | CFRP is adopted to embed protecting reinforced concrete cathode method and the device of anode |
| 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 |
| 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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| CN201310131212.9A CN103205755B (en) | 2013-04-16 | 2013-04-16 | CFRP is adopted to embed protecting reinforced concrete cathode method and the device of anode |
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| CN103205755A CN103205755A (en) | 2013-07-17 |
| CN103205755B true CN103205755B (en) | 2015-11-18 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103464279B (en) * | 2013-09-30 | 2015-08-19 | 沈阳隆基电磁科技股份有限公司 | The anticorrosion magnetic medium box of a kind of Verticle ring high intensity magnetic separator |
| CN104458402A (en) * | 2014-12-13 | 2015-03-25 | 广西科技大学 | Method for manufacturing specimen containing CFRP-PCPs (carbon fiber reinforced polymer-prestressed concrete prisms) composite rebars |
| CN104831288B (en) * | 2015-04-30 | 2018-04-17 | 深圳大学 | With reference to cathodic protection and the armored concrete guard method of structural strengthening and system |
| CN106011871A (en) * | 2016-08-04 | 2016-10-12 | 盐城工学院 | Method for protecting concrete structure cathode, and apparatus thereof |
| CN110016674B (en) * | 2019-04-25 | 2024-03-08 | 深圳大学 | Cathode protection device and method for reinforced concrete with CFRP stirrup as anode |
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