CN103205755A - Cathode protection method and cathode protection device for reinforced concrete adopting CFRP (carbon fibre reinforced plastics) embedded anode - Google Patents
Cathode protection method and cathode protection device for reinforced concrete adopting CFRP (carbon fibre reinforced plastics) embedded anode Download PDFInfo
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- CN103205755A CN103205755A CN2013101312129A CN201310131212A CN103205755A CN 103205755 A CN103205755 A CN 103205755A CN 2013101312129 A CN2013101312129 A CN 2013101312129A CN 201310131212 A CN201310131212 A CN 201310131212A CN 103205755 A CN103205755 A CN 103205755A
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Abstract
The invention discloses a cathode protection method and a cathode protection device for reinforced concrete adopting a CFRP (carbon fibre reinforced plastics) embedded anode. The method comprises the following steps of: forming a groove in a protection area according to the specified dimensions; arranging a CFRP sheet material on the surface of the protection area of a reinforced concrete structure body, wherein the CFRP sheet material comprises a stiffening rib adaptive to the groove, and a stiffening plate fixed on the inner surface of the protection area; and applying a binding material on the side surface connected with the concrete groove, of the stiffening rib of the CFRP sheet material, and between the stiffening plate and concrete, and connecting the stiffening rib with the concrete groove and connecting the stiffening plate with concrete in an embedding manner. In the device, the CFRP sheet material is designed to be a stiffening rib structure embedded in concrete, so that the distance and resistance between the CFRP sheet material and a reinforcing steel bar are reduced, thus being beneficial to the continuous and uniform distribution of protection currents in the concrete structure, and capable of achieving a better protection effect.
Description
Technical field
The present invention relates to material of construction structural defence field, relate in particular to and adopt CFRP to embed protecting reinforced concrete cathode method and the device of 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 effective means.The impressed current cathodic protection technology is based on that PH-potential ph diagram ph principle 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.Existing supplementary anode is tiled in the surface of structure often in flakes, or is fixed on the groove that structure is offered in advance dispersedly, and this is related with factors such as the zone of structural defence and concrete resistances.The former since supplementary anode be the bedding in big zone at body structure surface, then supplementary anode has bigger area coverage, for electric current continuously, evenly to distribute be favourable, but is limited by the inhomogeneous influence of concrete resistance, as titanium net anode; And the latter is fixed in the groove of structure with the form of disperseing, though the area coverage of anode is little, mean that the distribution continuity of electric current and homogeneity are all relatively poor, it has shortened itself and the distance of reinforcing bar in concrete, reduced concrete resistance between the two, as the baried type anode.In addition, concrete is a kind of heterogeneous material, the big and skewness of its resistivity and, be subject to Effect of Environmental.
In the prior art; the method of skeleton construction being reinforced from the angle of material; for example adopt steel plate and fiber to increase polymkeric substance (Fiber Reinforced Polymer; be called for short FRP) or the carbon fibre reinforced composite structural reinforcement materials such as (CFRP) in structural strengthening field come structural strengthening; but the deterioration of reinforcement material and loss all can destroy the protective layer that reinforcement material forms in the defective of construction technology, error, the structure military service process, cause concrete structure anticaustic to occur.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
Deficiency in view of above-mentioned existing supplementary anode application; the object of the present invention is to provide a kind of CFRP of employing to embed protecting reinforced concrete cathode method and the device of anode; be intended to solve existing supplementary anode and in application, run into concrete resistivity greatly and continuous, the equally distributed disadvantageous effect of inequality and electric current thereof; provide and adopt CFRP to embed protecting reinforced concrete cathode method and the device of anode; when being intended to reach the ideal effect of protection concrete structure, reduce the 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, size is offered a groove in accordance with regulations in the position, protection zone of skeleton construction, and removes the dust in the described groove;
B, on the surface, protection zone of skeleton construction body the CFRP sheet material is set, described CFRP sheet material comprises and the adaptive ribbed stiffener of described groove shapes and the stiffener of fixedlying connected with described ribbed stiffener and be fixed on the regional internal surface of described skeleton construction main body protection;
C, the matrix material that will have a conducting function spread upon between the surface and stiffener and concrete that the ribbed stiffener of described CFRP sheet material is connected with the concrete groove, are used for described ribbed stiffener is connected with concrete with concrete groove and stiffener;
D, the positive pole of CFRP sheet material with a direct current power supply is connected, reinforcing bar is connected with the negative pole of described direct supply; Described reinforcing bar and described matrix material form the galvanic circle of a closure 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 the described steps A:
A0, remove the concrete that loosens at the protection zone of skeleton construction body cutter, and polish flat.
Described employing CFRP embeds the protecting reinforced concrete cathode method of anode, wherein, also comprises step between described step B and the C:
B1, irregular zone in the concrete is poured into matrix material again, and push, the air of sneaking in the matrix material zone is extruded, and removed unnecessary matrix material.
Described employing CFRP embeds the protecting reinforced concrete cathode method of anode, wherein, also comprises step among the described step C:
C1, all reinforcing bars in the protection zone are electrically connected, and check 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 the D:
Electrical connectivity between D0, inspection reinforcing bar, concrete and the CFRP sheet material.
Described employing CFRP embeds the protecting reinforced concrete cathode method of anode, wherein, described matrix material be cement paste or added conductive particle epoxy resin glue.
Adopt CFRP to embed the protecting reinforced concrete cathode device of anode, be used for being installed in the skeleton construction body with bar construction, wherein, it comprise one be used for the skeleton construction body on the groove offered embed the CFRP sheet material of installing;
Described CFRP sheet material comprises and the adaptive ribbed stiffener of described groove shapes and the stiffener of fixedlying connected with described ribbed stiffener and be used for being fixed on the regional internal surface of described skeleton construction main body protection;
Between side surface and stiffener and concrete that the ribbed stiffener of described CFRP sheet material is connected with the concrete groove, be provided with the bonding material layer with conducting function;
Described protector also comprises a direct current power 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 the skeleton construction body; described reinforcing bar and described matrix material form the galvanic circle of a closure 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 the protection zone electrically connect.
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 has added conductive particle.
Beneficial effect: the invention provides protecting reinforced concrete cathode method and device that a kind of CFRP of employing embeds anode; 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 to reduce the protection cost greatly; adopting CFRP sheet material is that ribbed stiffener is connected with the concrete groove structure is embedded, thereby is conducive to reduce the resistance of protection zone inner concrete and the even distribution that reaches protective current.
Description of drawings
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, clearer, clear and definite for making purpose of the present invention, technical scheme and effect, below the present invention is described in more detail.Should be appreciated that specific embodiment described herein only in order to explaining the present invention, and be not used in restriction 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 is by forming with the lower section:
Several imbed among reinforcing bar 4(Fig. 1 in the concrete 3 quantity with reinforcing bar, and to be 2 be example), be electrically connected by lead between the described reinforcing bar; One CFRP sheet material 1 and a groove 31 of offering at described skeleton construction body; Shape size and the concrete required number of offering of described groove 31 are determined according to the needs of galvanic protection.
Described CFRP sheet material 1 comprises and the adaptive ribbed stiffener of described groove shapes 11 and that fixedly connected with described ribbed stiffener 11 and be fixed on the stiffener 12 of the regional internal surface of described skeleton construction main body protection.
The CFRP sheet material of being made up of ribbed stiffener 11 and stiffener 12 1 is connected with concrete groove 31 and concrete 3 surfaces by matrix material 2; thereby reduced the distance of the reinforcing bar 4 in CFRP sheet material 1 and the concrete 3; reduced resistance between the two, thereby can make protective current more even.
In concrete the application, described matrix material need satisfy and has conduction and CFRP stably can be fixed on performance on the concrete surface, for example is that the inorganic coagulation material of representative or the epoxy resin glue that has added conductive particles such as powdered graphite all can satisfy above-mentioned requirements with the cement paste.Preferably; use cement paste in the present invention; it is even glutinous mutually with the CFRP sheet surface; not only self has very high intensity; it with CFRP sheet material and concrete binding together; the stability that can improve whole concrete structure adopts CFRP to embed the protecting reinforced concrete cathode method of anode and installs employing CFRP and embeds the protecting reinforced concrete cathode method of anode and protecting reinforced concrete cathode method and the device that device adopts CFRP embedding 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 drawing among the figure), reinforcing bar 4 is connected with the negative pole of described direct supply, described reinforcing bar 4 links to each other with described matrix material 2 by described concrete 3 with described CFRP sheet material 1, and forms the galvanic circle of a closure with described direct supply.
The CFRP material is owing to not only possess the good mechanical performance; and it is good as the electric conduction of carbon fiber of main component; electropotential is near the electrochemical properties of precious metal; therefore in said apparatus; adopt the CFRP sheet material can utilize its mechanical property and electrochemical properties fully as the cathodic current supplementary anode; when considering structural reinforcing, given the technique effect of galvanic protection; and use the price of CFRP material lower than mixed metal oxide titanium anode; therefore saved the protection cost; and CFRP material pattern is flexible; can present different section forms, be easy in application, use.
Preferably, when the matrix material that adopts is cement paste, should satisfies its surface with the CFRP sheet material and contact well, and advise that its thickness is about 3mm.
In said apparatus; the quantity of the reinforcing bar difference of protection zone as required may be a lot of; need all reinforcing bars are electrically connected by lead, and detect the electrical connectivity between them, guarantee that the reinforcing bar in the concrete structure zone can both be protected.
What can expect certainly is that concrete structure is not limited in the rectangular beam structure shown in Fig. 1, can also be other structural shapes, as concrete cylindrical shape etc.
Based on the protecting reinforced concrete cathode device of above-mentioned employing CFRP embedding anode, the present invention also provides the protecting reinforced concrete cathode method that adopts CFRP embedding anode, is illustrated in figure 2 as the schema of method shown in the invention provides, and it may further comprise the steps:
S1, size is offered groove in accordance with regulations in position, described protection zone, and removes the dust in the described groove.
Before this step, for being had, concrete in the protection zone becomes continuous ionogen; therefore need in the protection zone of skeleton construction body, cut a hole and remove the concrete that loosens; expose solid part; polish flat and clean out; and irregular zone pours into matrix material again in concrete; and push, the air of sneaking in the matrix material zone is extruded, and removed unnecessary matrix material.
S2, on the surface, protection zone of skeleton construction body the CFRP sheet material is set, described CFRP sheet material comprises and the adaptive ribbed stiffener of groove shapes and the stiffener of fixedlying connected with described ribbed stiffener and be fixed on the regional internal surface of described skeleton construction main body protection.
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 links to each other with the groove of digging out is embedded; described stiffener is a CFRP plate, is fixed on the internal surface of concrete structure protection zone.
S3, the matrix material that will have a conducting function spread upon the side surface that the ribbed stiffener of described CFRP sheet material is connected with the concrete groove, and between stiffener and the concrete, and with described ribbed stiffener and concrete groove, and stiffener embeds with concrete and is connected.
Between CFRP sheet material and concrete, be coated with and spread matrix material, namely between described ribbed stiffener and groove and stiffener and concrete, add matrix material, make between ribbed stiffener and groove and stiffener and the concrete to be sticked together.
S4, the positive pole of CFRP sheet material with a direct current power supply is connected, described reinforcing bar is connected with the negative pole of described direct supply; Described reinforcing bar links to each other by described concrete electric with described matrix material, and forms the galvanic circle of a closure with described CFRP sheet material and described direct supply.
If the number of steel bars in the protection zone is one incessantly in this step; then need all reinforcing bars in the protection zone are electrically connected; and the electrical connectivity between the inspection reinforcing bar; and need to check electrical connectivity between reinforcing bar, concrete and the CFRP sheet material, guarantee that entire circuit can transmit cathodic protection current smoothly.
Described matrix material need satisfy and has conducting function and self have very strong intensity, preferably, matrix material used in present method is cement paste, in specific implementation process, need guarantee that concrete is continuous ionogen with the crack that occurs in the cement paste fill concrete.
Employing CFRP provided by the invention embeds protecting reinforced concrete cathode method and the device of anode; this device by use price than the cheap CFRP material of the mixed metal oxide titanium that uses in the prior art as supplementary anode; and use and have electroconductibility and bigger matrix material connecting reinforcement and the CFRP material of hardness own; thereby can be when obtaining desirable protection effect; protection cost and the steadiness that has strengthened protector have been reduced; and adopt type with ribbing cross section; reduced the distance between CFRP sheet material and the reinforcing bar; reduced resistance between the two; thereby be conducive to the even distribution of protective current in the concrete structure more, thereby can reach the better protection effect.
Should be understood that application of the present invention is not limited to above-mentioned giving an example, for those of ordinary skills, can be improved according to the above description or conversion that all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (10)
1. adopt CFRP to embed the protecting reinforced concrete cathode method of anode, it is characterized in that, comprise step:
A, size is offered a groove in accordance with regulations in the position, protection zone of skeleton construction, and removes the dust in the described groove;
B, on the surface, protection zone of skeleton construction body the CFRP sheet material is set, described CFRP sheet material comprises and the adaptive ribbed stiffener of described groove shapes and the stiffener of fixedlying connected with described ribbed stiffener and be fixed on the regional internal surface of described skeleton construction main body protection;
C, the matrix material that will have a conducting function spread upon between the surface and stiffener and concrete that the ribbed stiffener of described CFRP sheet material is connected with the concrete groove, are used for described ribbed stiffener is connected with concrete with concrete groove and stiffener;
D, the positive pole of CFRP sheet material with a direct current power supply is connected, reinforcing bar is connected with the negative pole of described direct supply; Described reinforcing bar and described matrix material form the galvanic circle of a closure by concrete and described CFRP sheet material and described direct supply.
2. embed the protecting reinforced concrete cathode method of anode according to the described employing of claim 1 CFRP, it is characterized in that, comprise before the described steps A:
A0, remove the concrete that loosens at the protection zone of skeleton construction body cutter, and polish flat.
3. embed the protecting reinforced concrete cathode method of anode according to the described employing of claim 1 CFRP, it is characterized in that, also comprise step between described step B and the C:
B1, irregular zone in the concrete is poured into matrix material again, and push, the air of sneaking in the matrix material zone is extruded, and removed unnecessary matrix material.
4. embed the protecting reinforced concrete cathode method of anode according to the described employing of claim 1 CFRP, it is characterized in that, also comprise step among the described step C:
C1, all reinforcing bars in the protection zone are electrically connected, and check electrical connectivity between each reinforcing bar.
5. embed the protecting reinforced concrete cathode method of anode according to the described employing of claim 1 CFRP, it is characterized in that, also comprise step between described step C and the D:
Electrical connectivity between D0, inspection reinforcing bar, concrete and the CFRP sheet material.
6. embed the protecting reinforced concrete cathode method of anode according to the described employing of claim 1 CFRP, it is characterized in that, described matrix material be cement paste or added conductive particle epoxy resin glue.
7. adopt CFRP to embed the protecting reinforced concrete cathode device of anode, be used for being installed in the skeleton construction body with bar construction, it is characterized in that, it comprise one be used for the skeleton construction body on the groove offered embed the CFRP sheet material of installing;
Described CFRP sheet material comprises and the adaptive ribbed stiffener of described groove shapes and the stiffener of fixedlying connected with described ribbed stiffener and be used for being fixed on the regional internal surface of described skeleton construction main body protection;
Between side surface and stiffener and concrete that the ribbed stiffener of described CFRP sheet material is connected with the concrete groove, be provided with the bonding material layer with conducting function;
Described protector also comprises a direct current power 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 the skeleton construction body; described reinforcing bar and described matrix material form the galvanic circle of a closure by concrete and described CFRP sheet material and described direct supply.
8. embed the protecting reinforced concrete cathode device of anode according to the described employing of claim 7 CFRP, it is characterized in that described CFRP sheet material is a CFRP plate.
9. embed the protecting reinforced concrete cathode device of anode according to the described employing of claim 7 CFRP, it is characterized in that all reinforcing bars in the protection zone electrically connect.
10. embed the protecting reinforced concrete cathode device of anode according to the described employing of claim 7 CFRP, it is characterized in that described matrix material is cement paste or the epoxy resin glue that has added conductive particle.
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 true CN103205755A (en) | 2013-07-17 |
| CN103205755B CN103205755B (en) | 2015-11-18 |
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| CN103464279A (en) * | 2013-09-30 | 2013-12-25 | 沈阳隆基电磁科技股份有限公司 | Anti-corrosion magnetic medium box used for vertical 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 |
| CN104831288A (en) * | 2015-04-30 | 2015-08-12 | 深圳大学 | Reinforced concrete protection method and system through combination of cathode protection and structure reinforcement |
| CN106011871A (en) * | 2016-08-04 | 2016-10-12 | 盐城工学院 | Method for protecting concrete structure cathode, and apparatus thereof |
| CN110016674A (en) * | 2019-04-25 | 2019-07-16 | 深圳大学 | A kind of CFRP stirrup is the cathode protection device and method of the armored concrete of anode |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104831288A (en) * | 2015-04-30 | 2015-08-12 | 深圳大学 | Reinforced concrete protection method and system through combination of cathode protection and structure reinforcement |
| CN106011871A (en) * | 2016-08-04 | 2016-10-12 | 盐城工学院 | Method for protecting concrete structure cathode, and apparatus thereof |
| CN110016674A (en) * | 2019-04-25 | 2019-07-16 | 深圳大学 | A kind of CFRP stirrup is the cathode protection device and method of the armored concrete of anode |
| 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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