CN1077232A - The method of passivation reinforcing bar in carbonization and/or chloride contaminated concrete - Google Patents
The method of passivation reinforcing bar in carbonization and/or chloride contaminated concrete Download PDFInfo
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- CN1077232A CN1077232A CN 93103422 CN93103422A CN1077232A CN 1077232 A CN1077232 A CN 1077232A CN 93103422 CN93103422 CN 93103422 CN 93103422 A CN93103422 A CN 93103422A CN 1077232 A CN1077232 A CN 1077232A
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- concrete
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 27
- 238000002161 passivation Methods 0.000 title abstract description 3
- 238000003763 carbonization Methods 0.000 title description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 title description 4
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 238000012545 processing Methods 0.000 claims description 10
- 239000004020 conductor Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 3
- 238000010000 carbonizing Methods 0.000 claims description 2
- 239000008186 active pharmaceutical agent Substances 0.000 claims 2
- 239000011244 liquid electrolyte Substances 0.000 claims 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract description 11
- 239000000460 chlorine Substances 0.000 abstract description 11
- 229910052801 chlorine Inorganic materials 0.000 abstract description 11
- 210000003205 muscle Anatomy 0.000 abstract description 2
- 229910001374 Invar Inorganic materials 0.000 abstract 1
- 230000001684 chronic effect Effects 0.000 abstract 1
- 238000002848 electrochemical method Methods 0.000 abstract 1
- 238000009335 monocropping Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 11
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 241000370738 Chlorion Species 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000008151 electrolyte solution Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000004210 cathodic protection Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 229910000464 lead oxide Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229930013930 alkaloid Natural products 0.000 description 1
- 150000003797 alkaloid derivatives Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000010349 cathodic reaction Methods 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910001923 silver oxide Inorganic materials 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
- MEYZYGMYMLNUHJ-UHFFFAOYSA-N tunicamycin Natural products CC(C)CCCCCCCCCC=CC(=O)NC1C(O)C(O)C(CC(O)C2OC(C(O)C2O)N3C=CC(=O)NC3=O)OC1OC4OC(CO)C(O)C(O)C4NC(=O)C MEYZYGMYMLNUHJ-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Working Measures On Existing Buildindgs (AREA)
- Aftertreatments Of Artificial And Natural Stones (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
Be used to repair the electrochemical method of Steel Concrete, reinforcing bar that wherein buries in as negative electrode and continuous cropping are to set up a distributed current between outside distribution electrode of anodic.Till when the volume value is enough to provide 500 ampere-hour electric charges to every square metre of bar list area at least for the electric current of 0.1 ampere of the surface-area of every square metre of reinforcing bar proceeds to always.This result makes reinforcing bar obtain a clean surface, and concrete does not on every side have chlorine and highly alkaline.After treatment, invar muscle surface forms one deck oxide film and makes it present chronic passivation.This method is than known technology economy and reliable and effective.
Description
Usually rely on the layer oxide film that forms on the surface of steel in the alkaline environment and prevent to be embedded in that reinforcing bar is corroded in the concrete.This oxide film has formed the barrier of resisting various etching reagent.Yet when concrete contains chlorion, or when absorbing carbon dioxide in air alkalescence is reduced, this passive oxidation film just can be cracked, thereby embedding reinforcing bar is corroded.
People have made number of research projects and have investigated reason and the mechanism that this concrete reinforcement deteriorates.Current consensus is: described corrosion process comes down to a kind of electrochemical effect, has promptly formed anode everywhere after those passive oxidation film ruptures, and those intact zones have then formed negative electrode around it.The anode of above-mentioned these formation and cathode zone have been formed a series of corrosion cell together just, cause the ion of anode region to be decomposed.
People have made an effort and have controlled this corrosion, or offset its formation corrosive cause, and have worked out many electricity-change method.The method that people know is so-called cathodic protection method, can not take place on the corrosive current potential even embedding reinforcing bar is in.
The cathodic protection facility has shown it is feasible, but it runs into many harmful factors, wherein at least one factor be this must be continual supervision of nonvolatil matching requirements and maintenance.The structural load that exceeds the quata that also has the cost height in addition, introduces because of the concrete cap rock of heaviness and be difficult to guarantee correct distribution of current some shortcomings like this.
Another method is referred to as the chlorine extraction method, though chlorion under effect of electric field, move to outside in the electrolytic solution and be deposited in the there, at last it is moved apart together with electrolytic solution.People's such as Vennesland U.S. Patent No. 4,032,803 promptly is an example of this method.Though this method is more effective and cheap than cathodic protection method, from but to a significant improvement of this method, finish this processing difficulty of required time yet this method has run into prediction again.Therefore, having no alternative requires often concrete to be carried out sampling and analysing, to determine the content of remaining chlorine.And difficulty is also that so far industrial concerning chlorine in the future corrodes for great remaining cl content is the safe consensus that also do not have.These factors make and are difficult to calculate for reaching a cost and the time that concrete process object is required.In some occasion, this time also may be looked and is difficult to practice, and it is difficult to pre-establish plan again especially.
The third method that is used for carbonated concrete is the electromigration infiltration carbonizing zone with the alkaloid substance of an external source.4,865,702 pairs of this method of people's such as Miller US Patent No are described.Though it is successful that this method is used in the carbonated concrete of low levels chlorine, when concrete contained in a large number such as chlorine one class ionic species, this method was just so ineffective, even can lead to the failure.And when containing slag cement in the concrete or being mixed with volcanic ash, its treatment time also need be grown and be difficult to accept.
Method of the present invention has overcome the difficulty that runs in above-mentioned all methods, it can predicted processing time, need not take a sample and do the chlorine analysis, implement fast, thereby save money, and to the concrete of nearly all type, carbonization or not carbonization, chloride or not chloride, whether be mixed with or be not mixed with pozzuolanic, and be that slag cement is all equally suitable.
The present invention is based on such discovery and affirmation: concrete electricity-change processing is not must be as for example cl content, or controls as the function of degree of carbonisation.The present invention but is based on such affirmation: concrete electricity-change processing can be used as the function of surface-area of embedding stiffener obtain optimum control.In a given structure, the surface-area of Embedded Steel then both can detect from the structure record, also can be the proximate calculation value.According to the present invention, more or less can be with people's such as Vennesland US Patent No 4,032,803, or the U.S. Patent No. 5 of Miller, xxx, xxx(Application No. No.539,069, June 15 nineteen ninety applying date) public method is implemented electrification and is handled in.But with preceding greatly differently be, for example no longer will take the core of concrete structure to evaluate the content of residual chlorine termly, but by controlling this electricity-change treating processes with reference to the cumulative current flow relevant with the total surface area of embedding reinforcing bar.Till when the surface-area that this process is performed until every square metre Embedded Steel reaches the minimum value of the 500 ampere hour magnitudes of current.Present method can finish in this stage (the electric magnitude of current that is preferably in every per square meter of surface area significantly surpasses before 2000 ampere hours), and regardless of residual chlorinity or in concrete the carbon content of each point what are.Can highly be sure of after this process finished when this stage: embedding reinforcing bar can be protected significant period of time.Compare with the method for prior art, treatment process of the present invention can make required energy over half with the time decreased of being taken.
Above-mentioned for a better understanding of the present invention and other characteristics and advantage, existing detailed description of consulting following embodiments of the invention and accompanying drawing.
Fig. 1 is a schematic representation of apparatus that is used to handle Steel Concrete of the inventive method.
Fig. 2 is an explanation Embedded Steel figure that its dullness increases in for some time after method of the present invention is handled.
Now consult accompanying drawing 1.Among the figure 1 the expression concrete structure, it comprise solidify and hardened embedding the concrete of reinforcing bar 12,12 of reinforcing bars can be known general types.According to the needs of engineering structure, the concrete reinforcing bar amount of per unit can have very big variation.Consider from the object of the invention, suppose that concrete structure is a sophisticated device, concrete 11 wherein can impel reinforcing bar 12 generation corrosive environment by chlorion infiltration, carbonization or by other and pollute.
In order to implement the present invention, the reinforcing bar that will protect is connected with the anode of provisional configuration in being placed on electrolysed substance or electrolytic solution, electrolytic solution then contacts with concrete surface, shown in configuration in, the electrode structure 13 of configuration when the anode of the direct supply that will represent with alphabetical G is connected to prison, its exposed surface with concrete structure 10 is communicated with on electric, and the negative terminal of this direct supply is linked to each other with Embedded Steel.Between the electrode of reinforcing bar and configuration, to realize quite equally distributed electric current in order making, many tie points can be set as required.For making effect better, electrode structure 13 can comprise makes the online suitable electro-conductive material such as steel or titanium wire network.In the example of the present invention, electrode structure is to be embedded in the electrolytic medium 14, and 14 exposed face 15 close proximity with concrete structure 10 of electrolytic medium are touched.
In suitable occasion, when surface 15 when last and level (or level of approximation) are put, electrolytic medium can be liquid, it is suitably soaked cover concrete surface.Best electrolytic medium is one and adheres to conducting material certainly that this class electrolytic medium of mixture is closed in the spray that all shape fibers of cellulose slurry in this way and water or other electrolysis are situated between.Before pressing discharge electrode structure 13, be coated with one deck fiber pulp earlier, by putting electrode structure 13 well, be coated with the last layer fiber pulp more then, so that electrode structure is embedded in the conducting material fully.In many occasions, for example when the concrete surface that exposes be vertical surface to the time, need to use this from adhering to electrolysed substance.
The electrode configuration of other form also is fine, and topped such as conductive surface, the paper tinsel layer directly contacts with concrete surface, adopts sponge metal blanket etc. when some situation.The specific form of the surface electrode of configuration is unimportant to the present invention, as long as it can have the function of energy effective configuration at embedding rebar surface.Best, total electric charge does not surpass about 2000 ampere hours on every square of rebar surface, can not receive tangible benefit otherwise the energy major part that consumes slatterns.Every square metre of rebar surface is actually deleterious by up to the total charge of 10,000 ampere hours the time, and this can make concrete quality degenerate.
For the real time that the required total charge of acquisition unit surface is taken, the direct supply that can provide then was provided, but in extremely wide restriction, influence is also not obvious.
Passed through the total charge of capacity at Embedded Steel 12 after, and electric current is turn-offed, whole device is removed,, then also it is also removed if external conductor is movably.Reinforcing bar after this handles will show strong passive state in long-time and will be protected at one.
Explain the processing of reinforcing bar being done with method of the present invention now.
Apply the electric charge that density is not less than 0.1 ampere every square metre at rebar surface a kind of phenomenon that is referred to as the cathodic disbonding effect has taken place.That is to say, thoroughly removed at existing oxide film or other films of rebar surface, and stayed a quite clean and active steel surface.Simultaneously, because described reinforcing bar is carried out very strong negative charging,, also be removed if therefore in concrete, there is chlorion to exist.This removing makes rebar surface not have chlorine.In addition, usually apart from the also essentially no chlorine of concrete on every side in 10 millimeters scopes of steel.Meanwhile, the electricity-change reaction that is caused by galvanic action, produce on the steel surface results in generation sodium hydroxide, and its amount can be penetrated into completely in the pore fluid of concrete of surrounding steel, thereby makes it present highly alkalescence.Above-mentioned cathodic reaction is commonly considered as getting following form:
O+2HO+4E→40H
2HO＝2e→H+2OH
Na+2HO Na
2Na+2HO→2NaOH+H
After the processing electric charge that has provided capacity electric current closed and have no progeny, reinforcing bar now will be totally, and no chlorine highly begins depassivation under the condition of alkaline environment.Under this suitable ideal environment, steel is with oxidized and produce one deck it avoids corroding the oxide film of required densification for protection.This oxidising process is actually the very corrosion of the special shape of fine and close protective oxide film that a kind of formation is referred to as passive film.
If desired, after forming, this tunic can monitor this reinforcing bar with respect to such as silver/silver oxide, lead/lead oxides, the current potential of canonical reference half-cells 16 such as copper/copper sulfate.Reference battery 16 preferably, and is non-certainly so certain, is installed near the steel that is monitored, for example imbeds in the concrete boring 17.
Fig. 2 shows the example of current potential and time variation.This figure demonstrates the passivating process that begins to carry out immediately after handling electric current and prolongs continuous segment length's time.If it is enough permanent that reference battery monitors, then this figure shows, from the corrosive viewpoint, steel has obtained to be considered to usually safe current potential.Really, if sufficiently long word, even could see whether steel becomes again and be in for corrosion that this is to indicate by corresponding hot spot from opposite direction again by the current potential of curve among the figure.
As shown in Figure 2, the reference potential that records with suitable voltmeter 18 at lead/lead oxides half- cell 16 and 12 of reinforcing bars slowly increased in the time at some months.Reference potential from initial approximately-400 millivolts increase gradually to about 500 millivolts (seeing it is comparatively safe) and gone through about 7 week from the corrosive viewpoint.After 1 year, reference potential continues to increase on about 700 millivolts level.
Find in the practice; protection is long-life to this method to corrosive; to preventing that penetrating of chlorion from being firm; and surprisingly; the corrosion protection that is provided finally expands to even outside processed zone and with treatment zone embedding copper muscle in the concrete in the zone of metallic contact is arranged, and even this expansion also takes place with device after removing after electric current is turned off.
The present invention adopts control to compare wondrous and beyond thought advantage according to the method described in the patent of people such as the method for the current control process on the surface of embedding reinforcing bar and aforesaid Vennesland and Miller, has realized very economic treatment process.Simultaneously, in the processing cycle of a plan, obtaining effectively, there is bigger guarantee protection/reparation aspect.Treatment process of the present invention under common situation, can approximately be to adopt the half the time that reaches the chlorinity assay method of thinking comparison safety can obtain reliable result.
The method of handling according to the surface-area of Embedded Steel of the present invention is the budget treatment time accurately, and will from the material of handling, extract core and test periodically, and can not seek knowledge in advance the required treatment time according to the control rule of the residual chlorinity of concrete.And, arrived core testing show chlorinity enough during fixed level, the ensuing treatment time also of the present inventionly thinks that the ampere hour required time of effective every per square meter of surface area is also long than obtaining to adopt.
Should be realized that burying the reinforcing bar amount in the unit of concrete structure is concrete can in very large range change.According to requirement of engineering, steel can change (square metre meter surface-area/unit square rice concrete surface of steel) to the ratio of concrete area in 0.2～2.Scope more generally is between 0.3 to 1.Therefore, should be realized that: the period that the required control treatment time beguine of trying to achieve according to the surface of reinforcing bar is tried to achieve according to core of concrete has tangible difference.
Certainly, should be understood that, more than the of the present invention concrete form of the diagram done and description just as example, because the clear instruction that people can deviate from the disclosed content of the present invention can be done some modification.Therefore, claims have just been determined whole claimed scope of the present invention.
Claims (4)
1, a kind of method of embedding reinforcing bar in the concrete being done the electrification processing, wherein electro-conductive material is added to concrete exposed surface, and to form a distribution electrode, the anode of a direct voltage source is added to described electro-conductive material, and negative terminal is added to described embedding reinforcing bar, it is characterized in that:
A) connect described direct voltage source, with as anodic described electro-conductive material and as the described Embedded Steel of negative electrode between produce a distributed current;
B) continue to connect described volts DS and described distributed current, until at described go-and-retum, when having flow through the electric current of about 500 ampere hours on the described Embedded Steel of every quadrature till, and
C) before roughly surpassing 2000 ampere hours, electric current that every square metre of Embedded Steel flows through interrupts described processing, and no matter remaining chlorinity and carbonizing degree in concrete.
2, according to the method for claim 1, it is characterized in that:
A) make after described volts DS adds and produce 0.5 to 10 ampere distributed current on the surface-area of every square metre of Embedded Steel.
3, according to the method for claim 1, it is characterized in that:
A) described electro-conductive material comprises liquid electrolyte.
4, according to the method for claim 1, it is characterized in that:
A) described electro-conductive material comprises that one can connect and removes from pasting material; And
B) after interrupting described processing, described material is removed from described concrete.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US85497592A | 1992-03-23 | 1992-03-23 | |
| US854,975 | 1992-03-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1077232A true CN1077232A (en) | 1993-10-13 |
| CN1094996C CN1094996C (en) | 2002-11-27 |
Family
ID=25320030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93103422A Expired - Fee Related CN1094996C (en) | 1992-03-23 | 1993-03-23 | Method for passivating steel in carbonated and/or chloride contaminated concrete |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JP2783957B2 (en) |
| CN (1) | CN1094996C (en) |
| IL (1) | IL104837A (en) |
| MY (1) | MY136951A (en) |
| TW (1) | TW222680B (en) |
| ZA (1) | ZA931554B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101517405B (en) * | 2006-09-11 | 2013-02-27 | Vsl国际股份公司 | Method and sensor for determining passivation property of mixture containing at least concrete and water |
| CN106283071A (en) * | 2016-09-22 | 2017-01-04 | 深圳大学 | A kind of protecting reinforced concrete cathode method and apparatus of CFRP anode |
| CN106400030A (en) * | 2016-10-26 | 2017-02-15 | 深圳大学 | CFRP anode reinforced concrete cathode protection device and method |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2277098A (en) * | 1993-04-15 | 1994-10-19 | John Bruce Miller | Electrochemical process for adjusting the steel-to-concrete bond strength and improving the sealing of the steel-concrete interface |
| WO1994024068A1 (en) * | 1993-04-15 | 1994-10-27 | Norwegian Concrete Technologies A.S. | Method for treating reinforced concrete and/or the reinforcement thereof |
| GB0001847D0 (en) * | 2000-01-27 | 2000-03-22 | Imperial College | Process for the protection of reinforcement in reinforced concrete |
| JP4492103B2 (en) * | 2002-11-25 | 2010-06-30 | 東洋製罐株式会社 | Surface-treated metal material and surface treatment method thereof, resin-coated metal material, metal can, can lid |
| JP5080725B2 (en) * | 2005-05-30 | 2012-11-21 | 株式会社富士ピー・エス | Method for electrochemical desalination of concrete structures |
| JP6018467B2 (en) * | 2012-09-20 | 2016-11-02 | ショーボンド建設株式会社 | Reference electrode and natural potential measurement method |
| CN106119859A (en) * | 2016-08-10 | 2016-11-16 | 江苏溧阳建设集团有限公司 | A kind of protecting reinforced concrete cathode device |
| CN106283072B (en) * | 2016-09-22 | 2018-08-31 | 深圳大学 | A kind of protecting reinforced concrete cathode method and apparatus of CFRP insertions anode |
| JP7025461B2 (en) * | 2020-01-29 | 2022-02-24 | デンカ株式会社 | Electrochemical treatment method and unit panel for electrodes |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4440605A (en) * | 1981-02-13 | 1984-04-03 | The Marine Resources Company | Repair of reinforced concrete structures by mineral accretion |
| JPS61221434A (en) * | 1985-03-27 | 1986-10-01 | 内田 欣一 | Regeneration of superannuated reinforced concrete structure or building |
| US4832803A (en) * | 1985-04-17 | 1989-05-23 | Oystein Vennesland | Removal of chlorides from concrete |
| JP2649090B2 (en) * | 1989-09-06 | 1997-09-03 | 東急建設 株式会社 | Desalination method for RC / SRC structure |
-
1993
- 1993-02-24 IL IL10483793A patent/IL104837A/en not_active IP Right Cessation
- 1993-03-04 ZA ZA931554A patent/ZA931554B/en unknown
- 1993-03-19 TW TW82102013A patent/TW222680B/zh active
- 1993-03-19 MY MYPI9300497 patent/MY136951A/en unknown
- 1993-03-23 CN CN93103422A patent/CN1094996C/en not_active Expired - Fee Related
- 1993-03-23 JP JP5064194A patent/JP2783957B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101517405B (en) * | 2006-09-11 | 2013-02-27 | Vsl国际股份公司 | Method and sensor for determining passivation property of mixture containing at least concrete and water |
| CN106283071A (en) * | 2016-09-22 | 2017-01-04 | 深圳大学 | A kind of protecting reinforced concrete cathode method and apparatus of CFRP anode |
| CN106400030A (en) * | 2016-10-26 | 2017-02-15 | 深圳大学 | CFRP anode reinforced concrete cathode protection device and method |
| CN106400030B (en) * | 2016-10-26 | 2018-08-31 | 深圳大学 | A kind of protecting reinforced concrete cathode device and method of CFRP anodes |
Also Published As
| Publication number | Publication date |
|---|---|
| TW222680B (en) | 1994-04-21 |
| MY136951A (en) | 2008-12-31 |
| IL104837A0 (en) | 1993-06-10 |
| JPH07232976A (en) | 1995-09-05 |
| CN1094996C (en) | 2002-11-27 |
| JP2783957B2 (en) | 1998-08-06 |
| ZA931554B (en) | 1993-10-13 |
| IL104837A (en) | 1996-01-31 |
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