CN201115981Y - Electrochemical re-alkalization device for carbonized reinforced concrete - Google Patents
Electrochemical re-alkalization device for carbonized reinforced concrete Download PDFInfo
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- CN201115981Y CN201115981Y CNU2007200754907U CN200720075490U CN201115981Y CN 201115981 Y CN201115981 Y CN 201115981Y CN U2007200754907 U CNU2007200754907 U CN U2007200754907U CN 200720075490 U CN200720075490 U CN 200720075490U CN 201115981 Y CN201115981 Y CN 201115981Y
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- reinforced concrete
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- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 40
- 239000003792 electrolyte Substances 0.000 claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 238000010000 carbonizing Methods 0.000 claims description 31
- 230000003014 reinforcing effect Effects 0.000 claims description 17
- 239000008151 electrolyte solution Substances 0.000 claims description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- 239000010936 titanium Substances 0.000 claims description 6
- 239000004567 concrete Substances 0.000 abstract description 23
- 230000008439 repair process Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 8
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 7
- 238000003763 carbonization Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 238000002161 passivation Methods 0.000 description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 229940072033 potash Drugs 0.000 description 3
- 235000015320 potassium carbonate Nutrition 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 2
- 229910052808 lithium carbonate Inorganic materials 0.000 description 2
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 description 2
- 229910000027 potassium carbonate Inorganic materials 0.000 description 2
- 235000011181 potassium carbonates Nutrition 0.000 description 2
- -1 sawdust Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 241000370738 Chlorion Species 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
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- 150000001450 anions Chemical class 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 230000004224 protection Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Working Measures On Existing Buildindgs (AREA)
Abstract
本实用新型涉及碳化钢筋混凝土的电化学再碱化装置。公开了一种碳化钢筋混凝土的电化学再碱化装置，包括碳化钢筋混凝土、阳极、盛有电解液的槽及直流电源，其中，直流电源正极与阳极连接，直流电源负极与碳化钢筋混凝土结构内的钢筋连接，阳极浸于电解液中，槽中的电解液与碳化钢筋混凝土表面接触。本实用新型所提供的电化学再碱化装置可修复各类受环境侵蚀而碳化的混凝土结构，特别适合于修复各类钢筋混凝土柱、梁、板、桩或其他类似的支柱结构，可以进行现场工程修复工作。
The utility model relates to an electrochemical re-alkalization device for carbonized reinforced concrete. Disclosed is an electrochemical re-alkalization device for carbonized reinforced concrete, comprising carbonized reinforced concrete, an anode, a tank containing electrolyte, and a DC power supply, wherein the positive pole of the DC power supply is connected to the anode, and the negative pole of the DC power supply is connected to the carbonized reinforced concrete structure. The steel bars are connected, the anode is immersed in the electrolyte, and the electrolyte in the tank is in contact with the carbonized reinforced concrete surface. The electrochemical re-alkalization device provided by the utility model can repair various concrete structures that are eroded and carbonized by the environment, and is especially suitable for repairing various types of reinforced concrete columns, beams, slabs, piles or other similar pillar structures, and can be carried out on-site Engineering restoration work.
Description
Technical field
The utility model relates to the electrochemical realkalization device of carbonizing reinforced concrete.
Background technology
Concrete is the human the most large building structural materials that uses, and armored concrete is widely used in the modernization projects construction such as harbour, dam, highway, bridge, municipal administration, maritime works.Yet, xoncrete structure is owing to be subjected to various environmental conditions, as the corrosion function of physics such as atmosphere, water, weather or chemistry, even reasonable in design, construction are correct, deterioration also often takes place in in-service, do not reach life expectancy and destroy, and brought enormous economic loss.Make a general survey of all kinds of environmental disruption mechanism of xoncrete structure, the main cause of concrete deterioration process (physics, chemistry and biological) and reinforcing bar or deformed bar generation deterioration has steel bar corrosion that freeze thawing circulation, alkali-aggregate reaction, sulfate attack, shrinkage cracking and chlorion or carbonization cause etc.These xoncrete structures often need to repair, repair and protection in the phase under arms.
Carbonization causes that the basicity reduction is one of main inducing that causes steel bar corrosion in the concrete.Prolong the service life of aging xoncrete structure, key is to recover reinforcing bar alkaline environment on every side.Therefore, how to realize one of the focus of engineering circle research always that raises of basicity in the carbonated concrete.Electrochemical techniques being applied in the reparation of carbonated concrete is a new technology.Had in the past to improving the report of the technology of basicity in the carbonated concrete, as European patent No.264421 and U.S. Patent No. 4865702.In this invention, electric current flows through between external electrode and the concrete reinforcing steel as negative electrode, and wherein external electrode then contacts with the alkaline electrolyte that is applied to the concrete outer surface.Two effects take place in this technology: alkaline electrolyte flows to concrete, increases at the cathodic region alkalinity.Make to infilter reinforcing bar passivation once more concrete electrolyte layer and above reinforcing bar and on every side, keep an area of coverage, so that reinforcing bar keeps passivation with sufficiently high pH value.This technology has been known as alkalization process more.Alkaline electrolyte as this technology, European patent No.264421 provides aqueous solution liquid or that be absorbed in the calcium in the porous media, sodium and/or sylvite such as asbestos, cellulose, sawdust, sand, clay, and perhaps electrolyte can be concrete, mortar, cement mortar or the lime white of strong slow setting.UK Patent Application No.2271123A has announced a kind of technology, has wherein used sodium carbonate or Boratex in the aqueous electrolyte.
The utility model content
The utility model utilizes the electrochemical realkalization device of carbonizing reinforced concrete, adopt electrochemical realkalization method in aqueous electrolyte, to recover the basicity of carbonizing reinforced concrete, purpose is to utilize the architectural characteristic and the environmental condition of armored concrete, electrochemical techniques are applied in the reparation of alkalization again of all kinds of xoncrete structures, thus the basicity of recovery reinforced concrete structure.
The utility model proposes following technical scheme for achieving the above object:
A kind of electrochemical realkalization device of carbonizing reinforced concrete, comprise carbonizing reinforced concrete, anode, fill the groove and the dc source of electrolyte, wherein, dc power anode is connected with anode, reinforcing bar in dc power cathode and the carbonizing reinforced concrete structure is connected, anode is dipped in the electrolyte, and the electrolyte in the groove contacts with the carbonizing reinforced concrete surface.
Preferable, the above-mentioned groove that fills electrolyte solution is removable.
Preferable, above-mentioned anode is the titanium net or the titanium plate of inertia, perhaps is active steel wire, is located at the carbonizing reinforced concrete body structure surface, or is wrapped in the carbonizing reinforced concrete body structure surface with tack coat.The size of anode depends on the size and the situation of the xoncrete structure of being repaired.
Preferable, above-mentioned carbonizing reinforced concrete is column.
Preferable, be connected with ammeter between above-mentioned dc power anode and anode, be connected with voltmeter between the above-mentioned dc source both positive and negative polarity.
The carbonizing reinforced concrete of the utility model indication is meant and is exposed in the atmosphere xoncrete structure of carbonization.
The electrolyte solution that the utility model adopted is meant the aqueous solution of lithium carbonate, sodium carbonate or potash, can directly be water also.The concentration of solution of potassium carbonate preferably is at least 0.1 mol, and concentration is particularly suitable for from the solution to saturated concentration more than 0.5 mol.Sodium carbonate or potash can be added to and prepare electrolyte solution in the water.Lithium carbonate, sodium carbonate, potash compound reach technical grade and get final product, and also are that its purity is greater than 99%.Electrolyte solution is easily by containing electrolyte solution and placing the groove of concrete surface to contact with concrete surface movably.The use of containing the electrolyte solution groove can be kept in touch electrolyte with that tilt, the vertical surface with on the top, and make this technology can be applicable to xoncrete structure below.
During practical operation, as negative electrode, is anode with the outside inert electrode that is layed in body structure surface with reinforcing bar in the reinforced concrete structure, is applying dc source voltage between the anode and cathode between the 1-500 volt, adjust dc source voltage, control required current density.Certain hour is inherent cloudy, and reinforcing bar between the anode (negative electrode) obtains current density up to 1～3A/m
2Make the passivation of reinforcing bar negative electrode, and under great electric field driven, relevant electrochemical reaction takes place, thereby reaches OH in charged ion to negative electrode or anode migration
-Ion moves near reinforcing bar, and reinforcing bar is realized passivation again, improves the basicity of inside concrete, realizes the alkalization again of carbonated concrete, and its operation principle as shown in Figure 1.
Compare with additive method, advantage of the present utility model mainly contains: electrochemical realkalization device provided by the utility model can be repaired and all kinds ofly be subjected to environmental attack and the xoncrete structure of carbonization, be particularly suitable for repairing all kinds of reinforced columns, stake or other similar corbelings, can carry out the field engineering repair.Rehabilitation cost is low, method is simple, repairing effect is good, reliable.
Description of drawings
Fig. 1: the electrochemical realkalization operation principle schematic diagram of carbonizing reinforced concrete
Fig. 2: the structure chart of the electrochemical realkalization device of carbonizing reinforced concrete pilework
The specific embodiment
An embodiment of the present utility model:
The electrochemical realkalization device of carbonizing reinforced concrete soil pilework as shown in Figure 2, comprise carbonizing reinforced concrete 4, anode 2, fill the groove and the dc source 1 of electrolyte, electrolyte is the solution of potassium carbonate of 0.5mol/l, carbonizing reinforced concrete 4, anode adopts titanium net or the titanium plate or the active steel wire of inertia, and be connected with the positive pole of dc source 1, anode is dipped in the electrolyte 3, the groove that fills electrolyte is wrapped in the carbonated concrete structure periphery, electrolyte in the groove contacts with the carbonizing reinforced concrete surface, and the reinforcing bar 5 in the carbonizing reinforced concrete is connected with the negative pole of dc source 1.Be connected with ammeter 7 between the positive pole of dc source 1 and anode, be connected with voltmeter 6 between the dc source 1 positive and negative level.
Reinforcing bar 5 in the concrete-pile couples together reinforcing bar for the negative electrode in electrolysis loop with strand wire, being connected of electric wire and reinforcing bar can soldering or electric welding, is connected with the circuit of reinforcing bar to strengthen.The junction adopts suitable insulation material such as silicone or epoxy to carry out seal isolation, and is connected with the negative pole of dc source.
The size of dc source voltage is determined according to the structure size of being repaired.Between negative electrode and anode, set up certain electric current, under the electrochemical action, make and chemical reaction takes place near negative electrode and the anode respectively, simultaneously, under electric field action, OH
-Move by concrete difference anode from electrolyte in anion, thereby the basicity that realizes inside concrete improves.For long 10m, the stake of diameter 0.5m xoncrete structure, suitable anode size should be 1000 square centimeters.The dc source power output should reach 1000 watts at least.According to the xoncrete structure of being repaired, requirement must have and reaches 15～500 volts of DC voltages, and the current density of output is controlled at 0.1～6A/m
2, be preferably in 0.5 to 3A/m
2Scope.Dc source can adopt battery feed, generator etc.
Basicity can for example be sprayed on phenolphthalein indicator on the concrete cross section of new sampling by measuring the method detection of pH value in the concrete, when the pH value greater than 10.5, usually greater than about 11, alkalization process can finish again.Measure zone that pH value determines that technology finishes far from the distance on surface usually with test before the selection first time the zone far from the surface apart from consistent.
Claims (6)
1. the electrochemical realkalization device of a carbonizing reinforced concrete, it is characterized in that, comprise carbonizing reinforced concrete, anode, fill the groove and the dc source of electrolyte, wherein, dc power anode is connected with anode, reinforcing bar in dc power cathode and the carbonizing reinforced concrete structure is connected, and anode is dipped in the electrolyte, and the electrolyte in the groove contacts with carbonizing reinforced concrete is surperficial.
2. the electrochemical realkalization device of carbonizing reinforced concrete as claimed in claim 1 is characterized in that, the described groove that fills electrolyte solution is removable.
3. the electrochemical realkalization device of carbonizing reinforced concrete as claimed in claim 1 is characterized in that, described anode is the titanium net or the titanium plate of inertia, perhaps is active steel wire.
4. the electrochemical realkalization device of carbonizing reinforced concrete as claimed in claim 1 is characterized in that, described anode is located at the carbonizing reinforced concrete body structure surface, or anode is wrapped in the carbonizing reinforced concrete body structure surface with tack coat.
5. the electrochemical realkalization device of carbonizing reinforced concrete as claimed in claim 1 is characterized in that, described carbonizing reinforced concrete is column.
6. as the electrochemical realkalization device of the described carbonizing reinforced concrete of arbitrary claim among the claim 1-5, it is characterized in that, be connected with ammeter between described dc power anode and anode, be connected with voltmeter between the described dc source both positive and negative polarity.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200754907U CN201115981Y (en) | 2007-10-16 | 2007-10-16 | Electrochemical re-alkalization device for carbonized reinforced concrete |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200754907U CN201115981Y (en) | 2007-10-16 | 2007-10-16 | Electrochemical re-alkalization device for carbonized reinforced concrete |
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| CN201115981Y true CN201115981Y (en) | 2008-09-17 |
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| CNU2007200754907U Expired - Fee Related CN201115981Y (en) | 2007-10-16 | 2007-10-16 | Electrochemical re-alkalization device for carbonized reinforced concrete |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102627473A (en) * | 2012-04-27 | 2012-08-08 | 浙江大学宁波理工学院 | Device and method for repairing concrete structure damaged by salt through two-step process |
| CN107782768A (en) * | 2016-08-28 | 2018-03-09 | 王树敏 | Soak armored concrete deterioration on-line monitoring system |
| CN108487664A (en) * | 2018-06-08 | 2018-09-04 | 华南理工大学 | Fiber concrete compression member repairing and reinforcement apparatus and method after a kind of high-temperature damage |
| CN110241437A (en) * | 2019-06-20 | 2019-09-17 | 同济大学 | An electrochemically induced mineral deposition system and method |
| CN112390662A (en) * | 2020-10-27 | 2021-02-23 | 上海交通大学 | Electrochemical repair method for dual degradation of alkali aggregate damage and steel bar corrosion |
-
2007
- 2007-10-16 CN CNU2007200754907U patent/CN201115981Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102627473A (en) * | 2012-04-27 | 2012-08-08 | 浙江大学宁波理工学院 | Device and method for repairing concrete structure damaged by salt through two-step process |
| CN102627473B (en) * | 2012-04-27 | 2013-07-24 | 浙江大学宁波理工学院 | Device and method for repairing concrete structure damaged by salt through two-step process |
| CN107782768A (en) * | 2016-08-28 | 2018-03-09 | 王树敏 | Soak armored concrete deterioration on-line monitoring system |
| CN108487664A (en) * | 2018-06-08 | 2018-09-04 | 华南理工大学 | Fiber concrete compression member repairing and reinforcement apparatus and method after a kind of high-temperature damage |
| CN110241437A (en) * | 2019-06-20 | 2019-09-17 | 同济大学 | An electrochemically induced mineral deposition system and method |
| CN110241437B (en) * | 2019-06-20 | 2021-03-26 | 同济大学 | Electrochemical induction mineral deposition system and method |
| CN112390662A (en) * | 2020-10-27 | 2021-02-23 | 上海交通大学 | Electrochemical repair method for dual degradation of alkali aggregate damage and steel bar corrosion |
| CN112390662B (en) * | 2020-10-27 | 2022-01-25 | 上海交通大学 | Electrochemical repair method for dual degradation of alkali aggregate damage and steel bar corrosion |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080917 Termination date: 20111016 |