CN103205758A - Strengthening method and device for cathode protection on reinforced concrete structure - Google Patents
Strengthening method and device for cathode protection on reinforced concrete structure Download PDFInfo
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- CN103205758A CN103205758A CN2013101313827A CN201310131382A CN103205758A CN 103205758 A CN103205758 A CN 103205758A CN 2013101313827 A CN2013101313827 A CN 2013101313827A CN 201310131382 A CN201310131382 A CN 201310131382A CN 103205758 A CN103205758 A CN 103205758A
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Abstract
The invention discloses a strengthening method and device for cathode protection on a reinforced concrete structure. The method comprises the following steps of: chiseling loose concrete in a strengthening area of a reinforced concrete structure body, polishing and flattening; setting carbon fiber reinforced plastics (CFRP) sheets on the surface of the strengthening area of the reinforced concrete structure body; electrically connecting multiple main reinforced bars embedded in the reinforced concrete structure body; and connecting an external power supply for applying current with the predetermined magnitude to the main reinforced bars between the main reinforced bars and the CFRP sheets. The CFRP sheets have the double functions of reinforcing materials and assisting the anode, requiring no extra anode, and a simple impressed current cathodic protection device without control systems and detection systems is adopted, so that the safety and durability of the structure are improved, and the cost performance is remarkably enhanced.
Description
Technical field
The present invention relates to the structural strengthening field of Steel Concrete, relate in particular to for the reinforcement means and the device that skeleton construction are carried out galvanic protection.
Background technology
Concrete weather resistance refers to that concrete resists the effect of various destructive factors under actual service conditions, keeps the ability of intensity and outward appearance integrity for a long time.
From the angle of materialogy, the main reason of reinforced concrete structure durability deterioration is the corrosion of inner reinforcing bar.Concrete chlorion self-contained or outside intrusion is considered to cause the main reason of reinforcement corrosion problem.The means that suppress steel bar corrosion are a lot, for example apply preservative coat and inhibiter etc., and wherein impressed current cathodic protection technology has been proved to be one of effective means, in some cases or even unique solution.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.Though in the structural concrete surface arrangement various dispersions or continuous supplementary anode are arranged, apply the effect that electric current can produce the control reinforcement corrosion, can not repair or improve the mechanical property of structure.
From the angle of structure design, the concrete structure durability deterioration is embodied in the decline of member mechanical property.Therefore the various countries scholar has carried out research widely, utilize steel plate and fiber-reinforced polymer (Fiber Reinforced Polymer, be called for short FRP) etc. structure strengthen and reinforcement material, proposed multiple structural strengthening technology such as increasing section and paste outside, and be applied to engineering practice.Structural strengthening material and concrete structure are born loading action jointly, can be considered the supplementary protection layer of concrete structure in some cases, and in the erosion of to a certain degree isolated outside atmosphere medium to internal structure, for example FRP wraps up the reinforcing of post etc.But deterioration and the loss of reinforcement material all can destroy this protective layer in the defective of construction technology and error, the structure military service process, cause the anticaustic of concrete structure.The more important thing is that the structural strengthening technology can't solve inside concrete harmful element (as the muriate in the sea sand concrete and vitriol etc.) continuation of reinforcing bar is corroded.Existing a lot of structures are reinforced more than once in the actual engineering, and often bad situation is repaiied repeatly in appearance repeatly.
And in the prior art, owing to need by Controlling System regulating voltage or electric current, thereby electrochemical parameter is met the demands, and reaching the purpose of protection, this certainly will need high cost, so carry out structural strengthening simultaneously and the galvanic protection cost is comparatively high.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art, the object of the present invention is to provide for the reinforcement means and the device that skeleton construction are carried out galvanic protection, be intended to solve to existing structure reinforce simultaneously and protect cause problem with high costs.
Technical scheme of the present invention is as follows:
A kind of for the reinforcement means that skeleton construction is carried out galvanic protection, wherein, comprise step:
A, remove the concrete that loosens at the reinforcing area of skeleton construction body cutter, and polish flat;
Electrically connect between B, the many Main Reinforcing Steels that need protection with skeleton construction body embedded set;
C, on the reinforcing area surface of skeleton construction body the CFRP sheet material is set;
D, between described Main Reinforcing Steel and CFRP sheet material, be connected an external power source that is used for Main Reinforcing Steel is applied the electric current of constant size.
Described for the reinforcement means that skeleton construction is carried out galvanic protection, wherein, the mechanical property that described CFRP sheet material is comprehensive utilization of C FRP and the matrix material based on CFRP of electrochemical properties.
Described for the reinforcement means that skeleton construction is carried out galvanic protection; wherein; among the described step C, described Main Reinforcing Steel is embedded in the concrete of described skeleton construction body, is connected by the matrix material with conducting function between described CFRP sheet material and the concrete.
Described for the reinforcement means that skeleton construction is carried out galvanic protection, wherein, described matrix material is for adding the epoxy resin glue of conductive particle.
A kind of for the bracing means that skeleton construction is carried out galvanic protection, be used for the skeleton construction body is protected, wherein, describedly comprise the CFRP sheet material on the reinforcing area surface that is arranged on described skeleton construction body and be used for many Main Reinforcing Steels that are embedded in the skeleton construction body are applied the external power source of the electric current of constant size for the bracing means that skeleton construction is carried out galvanic protection; Electrically connect between the described many Main Reinforcing Steels, described external power source is connected between Main Reinforcing Steel and the CFRP sheet material.
Described for the bracing means that skeleton construction is carried out galvanic protection; wherein; described Main Reinforcing Steel is embedded in the concrete of described skeleton construction body, is connected by the matrix material with conducting function between described CFRP sheet material and the concrete.
Described for the bracing means that skeleton construction is carried out galvanic protection, wherein, described matrix material is for adding the epoxy resin glue of conductive particle.
Described for the bracing means that skeleton construction is carried out galvanic protection, wherein, described Main Reinforcing Steel, concrete, CFRP sheet material, external power source electrically connect successively.
Described for the bracing means that skeleton construction is carried out galvanic protection, wherein, described CFRP sheet material is the CFRP plate, and the thickness of described CFRP plate is 1 ~ 2mm.
Described for the bracing means that skeleton construction is carried out galvanic protection, wherein, described skeleton construction body is rectangular configuration or cylindrical structural.
Beneficial effect: provided by the present invention for the reinforcement means and the device that skeleton construction are carried out galvanic protection; mechanical property based on the CFRP excellence; electrochemical properties and advantage such as can design; utilize the dual characteristics of CFRP double as reinforcement material and supplementary anode; need not extra supplementary anode; structural strengthening system and cathodic protection system are integrated into a structural system; and adopted the direct supply that only can export constant current or voltage value; and save conventional detection and Controlling System; simplified cathodic protector; thereby reach the double effects of structural strengthening and reinforcing bar protection; and then security and the weather resistance of skeleton construction and the cost that has obviously reduced structure repair have effectively been improved.
Description of drawings
Fig. 1 is used for structural representation that skeleton construction is carried out the bracing means preferred embodiment of galvanic protection for the present invention.
Fig. 2 is used for schema that skeleton construction is carried out the reinforcement means preferred embodiment of galvanic protection for the present invention.
Embodiment
The invention provides for the reinforcement means and the device that skeleton construction are carried out galvanic protection, 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.
See also Fig. 1, Fig. 1 is used for skeleton construction is carried out the structural representation of the bracing means of galvanic protection for the present invention, as shown in the figure, the present invention includes partly overlapping two macrostructure bodies: skeleton construction body 10 and cathodic protection structure body 20; In skeleton construction of the present invention; mechanical property and the electrochemical properties of CFRP material have been taken full advantage of; make the CFRP material in structural system of the present invention, serve as the dual role of reinforcement material and supplementary anode; therefore need not extra supplementary anode; structural strengthening system and cathodic protection system are integrated into a structural system; and adopted the direct supply that only can export constant current or voltage value; and save conventional detection and Controlling System; simplified cathodic protector; thereby reach the double effects of structural strengthening and reinforcing bar protection; and then security and the weather resistance of structure and the cost that has obviously reduced structure repair have effectively been improved.
As the carbon fibre reinforced composite (CFRP) of structural strengthening function because having advantages such as high-strength light, modulus are big, good corrosion resistance, be 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, i.e. and good electrical conductivity and near the electropotential of precious metal, CFRP has good electrochemical properties equally.The present invention utilizes the electrochemical properties of CFRP to form the impressed current cathodic protection method that a kind of novel supplementary anode is applied to skeleton construction.Therefore, can be in conjunction with the characteristic of CFRP ruggedized construction, and then form a kind of structural strengthening method and device that has the galvanic protection function.
Come the present invention is further detailed below in conjunction with accompanying drawing.
Described skeleton construction body 10 comprises concrete 3, is embedded in the many Main Reinforcing Steels 4 in the concrete 3, and CFRP sheet material 1 is arranged on the reinforcing area surface of described skeleton construction body 10; Described CFRP sheet material 1 matrix material based on CFRP for the mechanical property of comprehensive utilization of C FRP and electrochemical properties, comprise mixing matrix material that different fibers or body material produce etc., for example mixed the fibre reinforced composites of carbon fiber and glass fibre etc.
Electrically connect between the described Main Reinforcing Steel 4 and (connect by lead 5; also test the electrical connectivity between the Main Reinforcing Steel 4); be connected a negative pole that is used for the external power source 6(Main Reinforcing Steel 4 that Main Reinforcing Steel 4 applies the electric current of constant size is connected external power sources 6 between described Main Reinforcing Steel 4 and the CFRP sheet material 1; the positive pole of CFRP sheet material 1 connection external power source 6) electrically connects successively between described Main Reinforcing Steel 4, concrete 3, CFRP sheet material 1, the external power source 6, and constitute cathodic protection structure body 20.Described skeleton construction body 10 and cathodic protection structure body 20, its principle of design and method of calculation can not repeat them here with reference to relevant specification.
Described CFRP sheet material 1 has played the effect of reinforcement material and supplementary anode; it must have performances such as reliable mechanical property, electrochemical properties and weather resistance under long duration load, environmental factors and protective current acting in conjunction, in order to bring into play the function of structural strengthening and galvanic protection simultaneously.
In the present embodiment; described CFRP sheet material 1 can be according to cross section type and the enforcement position of member, Working environment under the prerequisite that takes into full account structural strengthening design and galvanic protection requirement; factors such as constructing operation are selected CFRP cloth or the CFRP plate of different sorts, cross section type for use.
Described CFRP sheet material 1 is preferentially selected the CFRP plate for use, advises that its thickness is taken as 1 ~ 2mm, for example 1mm, 1.2mm, 1.5mm, 1.8mm or 2mm.
Further, described CFRP sheet material 1 is connected by the matrix material 2 with conducting function with concrete 3.Matrix material 2 wherein must have the requirement that enough mechanical properties satisfy structural strengthening, also wants simultaneously to transmit cathodic protection current for a long time, does not produce objectionable impurities.Described matrix material 2 must have reliable mechanical property and electroconductibility etc. under long duration load, environmental factors and protective current acting in conjunction, do not influence the performance of CFRP sheet material 1 dual purpose.Preferably, in the present embodiment, described matrix material 2 can be to mix an amount of conductive particle in the adhesive structure glue of insulation (this matrix material should have good electrical conductivity and the CFRP sheet material firmly can be fixed on the performance of concrete surface, for example add the epoxy resin glue of conductive particle), as the awkward Graphite Powder 99 that consumes of conductive particle, matrix material 2 modulation are evenly made its mechanical property and electroconductibility reliably and with long-term, and CFRP sheet material 1 and concrete 3 are used for boning.
Further, between the Main Reinforcing Steel 4 of concrete embedded set reliable electrical connection 5 should be arranged, guarantee that the Main Reinforcing Steel 4 in the reinforcing area can both be protected.
Certainly, the skeleton construction that the present invention is directed to is not limited only to above-mentioned rectangular beam structure, also can be used for the skeleton construction shape of various protection needs, as structures such as concrete cylindrical shapes.
Based on above-mentioned skeleton construction, the present invention also is provided for skeleton construction is carried out the reinforcement means of galvanic protection, as shown in Figure 2, comprises step:
S101, remove the concrete that loosens at the reinforcing area of skeleton construction body cutter, and polish flat; This step mainly is that cutter goes to show loose concrete, exposes solid part, and cleans out, and polishes flat.
Electrically connect between S102, the many Main Reinforcing Steels that need protection with skeleton construction body embedded set; Can make the reinforcing bar that need be protected to obtain galvanic protection like this.
S103, on the reinforcing area surface of skeleton construction body the CFRP sheet material is set; The CFRP sheet material is as supplementary anode, and preferably adopts the CFRP plate, and the matrix material (as cement paste) that firmly pressurizes makes reinforcing area surface thickness homogeneous, after Main Reinforcing Steel is electrically connected, can guarantee that Main Reinforcing Steel can both be protected.
S104, between described Main Reinforcing Steel and CFRP sheet material, be connected an external power source that is used for Main Reinforcing Steel is applied the electric current of constant size.Can fill up the crack that occurs in the concrete with cement paste earlier; make concrete become continuous ionogen, then described Main Reinforcing Steel, concrete, CFRP sheet material, external power source are electrically connected successively, form complete path; transmit cathodic protection current, reinforcing bar is carried out galvanic protection.
The present invention has saved Controlling System and the detection system in the cathodic protection system owing to adopted the CFRP sheet material as supplementary anode in total system, significantly improve the cost performance of structure repair.
In sum; provided by the present invention a kind of for the reinforcement means and the device that skeleton construction are carried out galvanic protection; mechanical property based on the CFRP excellence; electrochemical properties and advantage such as can design; utilize the dual characteristics of CFRP double as reinforcement material and supplementary anode; need not extra supplementary anode; structural strengthening system and cathodic protection system are integrated into a structural system; and adopted the direct supply that only can export constant current or voltage value; and save conventional detection and Controlling System; simplified cathodic protector; thereby reach the double effects of structural strengthening and reinforcing bar protection; and then security and the weather resistance of structure and the cost that has obviously reduced structure repair have effectively been improved.
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. one kind is used for reinforcement means that skeleton construction is carried out galvanic protection, it is characterized in that, comprises step:
A, remove the concrete that loosens at the reinforcing area of skeleton construction body cutter, and polish flat;
Electrically connect between B, the many Main Reinforcing Steels that need protection with skeleton construction body embedded set;
C, on the reinforcing area surface of skeleton construction body the CFRP sheet material is set;
D, between described Main Reinforcing Steel and CFRP sheet material, be connected an external power source that is used for Main Reinforcing Steel is applied the electric current of constant size.
2. according to claim 1ly it is characterized in that the mechanical property that described CFRP sheet material is comprehensive utilization of C FRP and the matrix material based on CFRP of electrochemical properties for the reinforcement means that skeleton construction is carried out galvanic protection.
3. according to claim 1 for the reinforcement means that skeleton construction is carried out galvanic protection; it is characterized in that; among the described step C; described Main Reinforcing Steel is embedded in the concrete of described skeleton construction body, is connected by the matrix material with conducting function between described CFRP sheet material and the concrete.
4. according to claim 3ly it is characterized in that for the reinforcement means that skeleton construction is carried out galvanic protection that described matrix material is for adding the epoxy resin glue of conductive particle.
5. one kind is used for bracing means that skeleton construction is carried out galvanic protection, be used for the skeleton construction body is protected, it is characterized in that, describedly comprise the CFRP sheet material on the reinforcing area surface that is arranged on described skeleton construction body and be used for many Main Reinforcing Steels that are embedded in the skeleton construction body are applied the external power source of the electric current of constant size for the bracing means that skeleton construction is carried out galvanic protection; Electrically connect between the described many Main Reinforcing Steels, described external power source is connected between Main Reinforcing Steel and the CFRP sheet material.
6. according to claim 5 for the bracing means that skeleton construction is carried out galvanic protection; it is characterized in that; described Main Reinforcing Steel is embedded in the concrete of described skeleton construction body, is connected by the matrix material with conducting function between described CFRP sheet material and the concrete.
7. according to claim 6ly it is characterized in that for the bracing means that skeleton construction is carried out galvanic protection described matrix material is the epoxy resin glue that has added conductive particle.
8. according to claim 7ly it is characterized in that for the bracing means that skeleton construction is carried out galvanic protection described Main Reinforcing Steel, concrete, CFRP sheet material, external power source electrically connect successively.
9. according to claim 5ly it is characterized in that for the bracing means that skeleton construction is carried out galvanic protection described CFRP sheet material is the CFRP plate, the thickness of described CFRP plate is 1 ~ 2mm.
10. according to claim 5ly it is characterized in that for the bracing means that skeleton construction is carried out galvanic protection described skeleton construction body is rectangular configuration or cylindrical structural.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310131382.7A CN103205758B (en) | 2013-04-16 | 2013-04-16 | For carrying out reinforcement means and the device of galvanic protection to skeleton construction |
| 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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| CN201310131382.7A CN103205758B (en) | 2013-04-16 | 2013-04-16 | For carrying out reinforcement means and the device of galvanic protection to skeleton construction |
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| CN103205758A true CN103205758A (en) | 2013-07-17 |
| CN103205758B CN103205758B (en) | 2015-09-09 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011871A (en) * | 2016-08-04 | 2016-10-12 | 盐城工学院 | Method for protecting concrete structure cathode, and apparatus thereof |
| CN106637232A (en) * | 2016-12-09 | 2017-05-10 | 北京工业大学 | Improvement method for electrochemical extraction of chlorine ions in concrete |
| WO2018201739A1 (en) * | 2017-05-04 | 2018-11-08 | 深圳大学 | Reinforcing device having anchoring structure and reinforcing method |
| CN113216263A (en) * | 2021-04-26 | 2021-08-06 | 哈尔滨工业大学（深圳） | Active and passive dual-protection seawater sea sand reinforced concrete member and preparation method thereof |
| CN114775399A (en) * | 2022-04-13 | 2022-07-22 | 邓康伟 | Fabricated steel bridge and construction method thereof |
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| JPH11200516A (en) * | 1998-01-20 | 1999-07-27 | Oriental Construction Co Ltd | Anticorrosion reinforcing concrete assembly, its anticorrosion method and assembling method |
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2013
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH11200516A (en) * | 1998-01-20 | 1999-07-27 | Oriental Construction Co Ltd | Anticorrosion reinforcing concrete assembly, its anticorrosion method and assembling method |
| CN203256336U (en) * | 2013-04-16 | 2013-10-30 | 深圳大学 | Reinforcement device for cathodically protecting reinforced concrete structure |
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| S.GADVE ET AL.: ""Active Protection of Fiber-Reinforced Polymer-Wrapped Reinforced Concrete Structures Against Corrosion"", 《CORROSION》, vol. 67, no. 2, 28 February 2011 (2011-02-28), XP001560059, DOI: doi:10.5006/1.3549564 * |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011871A (en) * | 2016-08-04 | 2016-10-12 | 盐城工学院 | Method for protecting concrete structure cathode, and apparatus thereof |
| CN106637232A (en) * | 2016-12-09 | 2017-05-10 | 北京工业大学 | Improvement method for electrochemical extraction of chlorine ions in concrete |
| CN106637232B (en) * | 2016-12-09 | 2018-11-02 | 北京工业大学 | A kind of improved method of electrochemistry extraction Chloride Ion in Concrete |
| WO2018201739A1 (en) * | 2017-05-04 | 2018-11-08 | 深圳大学 | Reinforcing device having anchoring structure and reinforcing method |
| CN113216263A (en) * | 2021-04-26 | 2021-08-06 | 哈尔滨工业大学（深圳） | Active and passive dual-protection seawater sea sand reinforced concrete member and preparation method thereof |
| CN114775399A (en) * | 2022-04-13 | 2022-07-22 | 邓康伟 | Fabricated steel bridge and construction method thereof |
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