CN107941688B - Electric accelerating concrete corrosion experimental rig and method under a kind of high hydraulic gradient - Google Patents
Electric accelerating concrete corrosion experimental rig and method under a kind of high hydraulic gradient Download PDFInfo
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- CN107941688B CN107941688B CN201711456388.6A CN201711456388A CN107941688B CN 107941688 B CN107941688 B CN 107941688B CN 201711456388 A CN201711456388 A CN 201711456388A CN 107941688 B CN107941688 B CN 107941688B
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Abstract
The invention discloses accelerating concrete corrosion experimental rig electric under a kind of high hydraulic gradient and methods, including chamber, external pressure machine, external power supply and test electrode；At least one pressure test room is provided in chamber, the middle part of pressure test room is equipped with test specimen fixed groove, and pressure test room is divided into anode test section and cathode test area by concrete sample；Testing electrode includes test anode and test cathode, and test anode is arranged in anode test section；Cathode is tested to be arranged in cathode test area；Anode test section and cathode test area are filled with conductive corrosion liquid；External pressure machine is connected with pressure pipeline, and the other end of pressure pipeline protrudes into the conductive corrosion liquid in anode test section；The bottom in anode test section and cathode test area is provided with draining probe tube.The present invention test can permeate influence of the corrosion to concrete performance under the high hydraulic gradient effect of long term constant, can measure correlation test data, carry out the research of concrete dissolved corrosion test.
Description
Technical field
The present invention relates to simulation test field, electric accelerating concrete corrosion experimental rig under especially a kind of high hydraulic gradient
And method.
Background technique
Hydro-concrete Structures are contacted with ambient water for a long time, are also easy to produce corrosion, and internal solid phase calcium dissolves, and in convection current
Be precipitated under diffusion, cause structure to deteriorate, bearing capacity reduce, endanger engineering safety.Dam work structure such as concrete surface
Plate, seepage proof curtain and deep tunnel are run under high hydraulic gradient for a long time, and infiltration water flow is to the precipitation effect of ion much larger than dense
Diffusion caused by degree difference, degradation speed compare the contact dissolution of the components such as gate pier, bridge pier faster.Now, emerging both at home and abroad
The a collection of high dam engineering such as water cloth a strip of land between hills rock, concrete hyperboloid arched dam height of dam built has reached 200m and 300m.Once work
Journey accident, very harmful, the corrosion durability under the especially high hydraulic gradient of the durability of concrete is that high dam engineering is long-term
It cannot be neglected major issue during safe operation.
The dissolved corrosion test of existing concrete is studied, and accelerates the method for corrosion process to have chemical solution etching and electricity to accelerate molten
Etching method, chemical solution erosion uses ammonium nitrate solution, however ammonium nitrate is a kind of high explosives, is not easy to obtain and extremely endanger
Danger needs not stop to be passed through ammonia, to keep solution ph stability during corrosion.Ammonia has penetrating odor, tests process
In be difficult to keep and be fully sealed, adverse effect easily is brought to experimental enviroment.Dissolved corrosion test method is accelerated using electricity, is chiefly used in contacting
Dissolved corrosion test.Since infiltration dissolved corrosion test hydraulic pressure is high, usually to reach 1 ~ 2MPa, to the intensity of dissolved corrosion test case, rigidity and
The requirement of leakproofness between corrosion test specimen is high, and existing research is limited to testing equipment and experimental technique, can't be used for seeping
Saturating dissolved corrosion test.
Summary of the invention
In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to provide under a kind of high hydraulic gradient
Electric accelerating concrete corrosion experimental rig, electric accelerating concrete corrosion experimental rig can be in long term constant height under the high hydraulic gradient
Influence of the lower test infiltration corrosion of hydraulic gradient effect to concrete performance, can measure correlation test data, carry out concrete
Dissolved corrosion test research.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
Electric accelerating concrete corrosion experimental rig under a kind of high hydraulic gradient, including chamber, external pressure machine, external electrical
Source and test electrode.
At least one pressure test room is provided in chamber, the inner wall of pressure test room is insulating surface；Pressure
Test specimen fixed groove is provided in the middle part of test cabinet, the surrounding of concrete sample can be sealed with test specimen fixed groove to be cooperated, and mixed
Pressure test room is divided into anode test section and cathode test area by solidifying soil test specimen；Testing electrode includes test anode and test yin
Pole, test anode setting are connected in anode test section, and through conducting wire with the anode of external power supply；Cathode setting is tested to exist
In cathode test area, and it is connected by conducting wire with the cathode of external power supply.
Anode test section and cathode test area are filled with conductive corrosion liquid.
External pressure machine is connected with pressure pipeline, and the other end of pressure pipeline protrudes into the conductive corrosion in anode test section
In liquid；The bottom in anode test section and cathode test area is provided with draining probe tube.
Cathode test area is provided with the support frame for being used to support concrete sample.
Support frame includes two stainless steel stents being parallel to each other, the both ends of every stainless steel stent be arranged one it is high-elastic
Property rubber earring moulding, the periphery of every stainless steel stent coats rubber sleeve.
Temperature sensor and pressure sensor are provided in anode test section and cathode test area.
There are three the pressure test room being parallel to each other, each pressure test room is square shape for setting in chamber.
Chamber is made of stainless steel, and the inner wall of chamber is coated with electrostatic insulating coating.
Conductive corrosion liquid is the deionized water of pH=7.
It is electric under the high hydraulic gradient the present invention also provides accelerating concrete corrosion test method electric under a kind of high hydraulic gradient
Accelerating concrete corrosion test method test can permeate corrosion to concrete performance under the high hydraulic gradient effect of long term constant
It influences, correlation test data can be measured, carry out the research of concrete dissolved corrosion test.
Electric accelerating concrete corrosion test method, includes the following steps under a kind of high hydraulic gradient.
Step 1, lay test specimen fixed groove: test specimen fixed groove, test specimen fixed groove is arranged in the middle part of pressure test room
Including homogeneous intercommunicated cap recess, bottom plate groove and two side walls groove, rubber waterproof material is laid in test specimen fixed groove
Material, and use structure gluing knot, after rolled with iron rod and keep its bonding close.
Step 2, mounting temperature sensor and pressure sensor: anode test section and cathode test area respectively lay a temperature
Sensor and pressure sensor；All temperature sensor and pressure sensor are connected with host.
Step 3, install concrete sample: production concrete sample simultaneously conserves, and the concrete sample for conserving completion is put into step
It in the rapid 1 test specimen fixed groove laid, and is cemented in bottom and two sides with structure glue, makes concrete sample and test specimen fixed groove
Between form sealing structure；Region positioned at the two sides of concrete sample is respectively anode test section and cathode test area.
Step 4, be arranged support frame: one end of support frame is connected with the inner wall in cathode test area, support frame it is another
The concrete sample installed with step 3 is held to be connected.
Step 5, installation test electrode: test electrode includes test anode and test cathode, and test anode is arranged in anode
In test section, and it is connected by conducting wire with the anode of external power supply；It tests cathode to be arranged in cathode test area, and by leading
Line is connected with the cathode of external power supply.
Step 6, inject conductive corrosion liquid: anode test section and cathode test area inject conductive corrosion liquid and then seal up
Top cover makes top cover be connected with the side wall of chamber using high-pressure bolt, forms closed environment.
Step 7, anode test section is pressurizeed: external pressure machine is opened, the conductive corrosion liquid pressurization into anode test section, when
When the pressure of conductive corrosion liquid in anode test section reaches setting pressure, external power switch is opened, voltage 60V is set, is opened
Electric accelerating concrete corrosion test under high hydraulic gradient when the setting pressure that begins.
Step 8, sampling Detection: according to setting interval time, opening and closing drains the sealing valve on probe tube, thus to anode
Conductive corrosion liquid in test section and cathode test area is sampled detection, and judges the corrosion feelings of chamber inner concrete test specimen
Condition.
Step 9, it takes out concrete sample: after the test, opening chamber, take out concrete sample, observation corrosion feelings
Condition records data.
In step 1, have in chamber there are three the pressure test room being parallel to each other, each pressure test room is according to step
1 is operated to the method for step 7, in step 7, the setting pressure in three pressure test rooms be respectively 1.0MPa,
1.5MPa and 2.0MPa.
In step 5, test anode is the titanium alloy electrode plate using single side oxide coating, and test cathode is stainless steel
Plate.
The invention has the following beneficial effects:
1, the present invention can provide concrete for hydraulic structure test specimen high hydraulic gradient infiltration corrosion environment, and can provide and stablize electrification
Potential energy is learned, the rate travel of calcium ion in pore solution is accelerated, can be carried out the corrosion examination that electricity under high hydraulic gradient accelerates concrete
It tests.
2, conventional dissolved corrosion test is carried out in not closed plastics corrosion slot, this experimental rig is one closed stainless
Steel chamber has the characteristics that intensity height, good seal performance, can pour into high pressure water, hydraulic pressure ranges up to 2MPa, highest hydraulic gradient
Degree can satisfy high hydraulic gradient work locating for simulation High Concrete Dam, face dam concrete seepage-proofing body up to 2000 completely
Condition.
3, how fastly Conventional contact corrosion and infiltration dissolved corrosion test period are long, be typically necessary half a year, 1 year even several years,
The fast efficient dissolved corrosion test that carries out is a difficult point for carrying out hydroconcrete durability evaluation, and the present invention uses electro-migration tests
Means couple high hydraulic gradient condition, compared to conventional corrosion means, have the advantages that the test period is short, significant effect.
4, the test specimen fixed groove of chamber setting of the present invention, is capable of fixing concrete sample, while using rubber waterproof material
Package bonds close sealing structure between formation concrete sample and chamber with structure glue, effectively prevents yin-yang the two poles of the earth
Intercommunication leakage occurs for solution, keeps test result more acurrate.
5, the concrete sample under high hydraulic gradient effect, bears biggish water pressure in anode test section, is also easy to produce
Bending deformation leads to opening, the closure of local hole, influences infiltration coefficient and diffusion coefficient, so that test result is generated space and becomes
Different, cathode test area is provided with two stainless steel stents in the present apparatus chamber, and stainless steel stent is wrapped up with rubber sleeve, can
It is effectively prevent concrete sample damage cracking after corrosion deterioration, keeps test result more acurrate.
6, this experimental rig can carry out the concrete for hydraulic structure corrosion under different water pressures, different voltages conditional combination operating condition
Test, during the test can real-time monitoring water pressure, solution temperature, can pass through monitoring anode and cathode lateral water pressure variation
The working condition of sealing device is verified, after chamber hydraulic pressure reduces, can be mended by inlet valve door injection pressure water
Pressurising power, the present apparatus can erode solution sampling in anode and cathode side outlet valve, attack solution during research corrosion
Variation.
Detailed description of the invention
Fig. 1 shows the structural schematic diagram of electric accelerating concrete corrosion experimental rig under a kind of high hydraulic gradient of the present invention.
Fig. 2 shows the structural schematic diagram of top cover.
Fig. 3 shows the structural schematic diagram of chamber.
Wherein have: 1. external power supplies；2. cathode test area pressure sensor；3. high-pressure bolt；4. cap recess；5. cathode
Test section temperature sensor；6. high elastic rubber pedestal；7. cathode electrode；8. stainless steel stent；9. bottom plate groove；10. anode
Test section pressure sensor；11. external pressure machine；12. pressure pipeline valve；13. top cover；14. pressure pipeline；15. anode is surveyed
Try area's temperature sensor；16. anode electrode；17. chamber side wall；18. concrete sample；19. bottom plate；20. anode test section
Sealing valve；21. anode test section drains probe tube；22. rubber waterproof material；23. anode test section；24. cathode test area；
25. polymer insulation coating；26. cathode test area drains probe tube；27. cathode test area sealing valve；28. pressure test room
One；29. pressure test room two；30. pressure test room three.
Specific embodiment
Xia Mianjiehefutuhejuti compare Jia Shishifangshiduibenfamingzuojinyibuxiangxishuoming.
As shown in Figure 1, electric accelerating concrete corrosion experimental rig under a kind of high hydraulic gradient, including chamber, external pressure
Power machine 11, external power supply 2 and test electrode.
At least one pressure test room, preferably 3 pressure test rooms, the quantity of pressure test room are provided in chamber
It is configured with specific reference to use demand.3 pressure test rooms are parallel to each other, as shown in figure 3, respectively pressure test room one
28, pressure test room 2 29 and pressure test room 3 30.3 pressure test rooms can carry out 3 groups of tests simultaneously, carry out control variable
Test, research at various pressures, under different water temperatures, under different voltages, under different electrolyte solution concrete sample corrosion
Situation.
When pressure test room is one, chamber is preferably square, when pressure test room is more than two, test
Case is preferably cuboid, and each pressure test room is both preferably square shape.
As shown in figure 3, the preferred size of chamber be long 1300mm, the large-scale cuboid of high 450mm, wide 450mm, 3
Pressure test room is laid along the long side direction, and the size of each pressure test room is respectively the square of 400*400*400, and wall thickness is equal
For 25mm.
Chamber is preferably made of stainless steel, and the inner wall of chamber is preferably applied by the way of electrostatic coating
It is covered with the electrostatic insulating coating of 2mm, forms insulating surface, prevents inner wall from electrochemical reaction occurs in experiment, makes experimental result
It is more acurrate.Above-mentioned electrostatic insulating coating is preferably polymer insulation coating 25.
Chamber includes chamber side wall 17, bottom plate 19 and top cover 13, and bottom plate is preferably wholely set with chamber side wall,
The structure of top cover is as shown in Fig. 2, top cover preferably passes through the high-pressure bolt that surrounding is arranged in and chamber side wall is sealedly and fixedly connected.
The inner wall of above-mentioned chamber includes the inner wall of chamber side wall, plate upper surface and top cover lower surface.
Test specimen fixed groove is provided in the middle part of pressure test room, the surrounding of concrete sample 18 can be with test specimen fixed groove
Sealing cooperation, and pressure test room is divided into anode test section 23 and cathode test area 24 by concrete sample.
Test specimen fixed groove includes homogeneous intercommunicated cap recess 4, bottom plate groove 9 and two side walls groove.
Testing electrode includes test anode 16 and test cathode 7, and test anode is arranged in anode test section, and by leading
Line is connected with the anode of external power supply；It tests cathode to be arranged in cathode test area, and passes through the yin of conducting wire and external power supply
Pole is connected.
Test anode is preferably the titanium alloy electrode plate for using single side oxide coating, and test cathode is preferably stainless steel
Plate.
Anode test section and cathode test area are filled with conductive corrosion liquid, and conductive corrosion liquid is preferably the deionization of pH=7
Water, but may be other known corrosion liquid.
External pressure machine is connected with pressure pipeline 14, and the other end of pressure pipeline protrudes into sun after passing through the through-hole on top cover
In conductive corrosion liquid in the test section of pole, the present invention provides stable hydraulic pressure for chamber using external pressure machine, forms Gao Shui
Force gradient environment.Pressure pipeline valve 12 is provided on pressure pipeline.
The bottom of anode test section is provided with draining probe tube 21, drains and is provided with sealing valve 20 on probe tube.Cathode
The bottom of test section is provided with draining probe tube 26, drains and is provided with sealing valve 27 on probe tube.Cathode test area is provided with
It is used to support the support frame of concrete sample, concrete sample is by bending at crack when preventing anode test section from applying water pressure.
Above-mentioned support frame preferably includes two stainless steel stents being parallel to each other 8, and the both ends of every stainless steel stent are set
A high elastic rubber pedestal 6 is set, the periphery of every stainless steel stent coats rubber sleeve.Every stainless steel stent is preferably long
For 150mm, diameter 30mm.High elastic rubber pedestal preferably uses structure to be adhesive on concrete sample or chamber side wall,
Its diameter is preferably 50mm, and high elastic rubber pedestal is provided with a certain size hole, and stainless steel stent can insert in the hole.
Temperature sensor and pressure sensor are preferably provided in anode test section and cathode test area；Wherein, it is located at
Temperature sensor and pressure sensor in anode test section are respectively anode test section temperature sensor 15 and anode test section
Pressure sensor 10；Temperature sensor and pressure sensor in cathode test area are respectively cathode test area temperature sensing
Device 5 and cathode test area pressure sensor 2.
Electric accelerating concrete corrosion test method, includes the following steps under a kind of high hydraulic gradient.
Step 1, it lays test specimen fixed groove: first opening top cover, unscrew all high-pressure bolts on top cover with spanner, take out
Top cover；Then test specimen fixed groove is set at the middle part of pressure test room, test specimen fixed groove includes homogeneous intercommunicated top cover
The length, width and height of groove, bottom plate groove and two side walls groove, cap recess and bottom plate groove are preferably 420mm*100*10mm, and two
The length, width and height of a sidewall notches are preferably 100mm*10mm*420mm.It is laid with rubber waterproof material in test specimen fixed groove, and
The extension of test specimen fixed groove also spreads rubber waterproof material, and uses structure gluing knot, after rolled with iron rod it made to be tightly bonded
It is close.
This step wherein, preferably has in chamber there are three the pressure test room being parallel to each other, each pressure test room is equal
The laying of test specimen fixed groove is carried out according to the method described above.3 groups or more group tests can be thus carried out simultaneously, such as in different pressures
Under, it is efficiently convenient under different voltages, under different electrolyte solutions etc. under different water temperatures.
Step 2, mounting temperature sensor and pressure sensor: anode test section and cathode test area respectively lay a temperature
Sensor and pressure sensor, temperature sensor are preferably rotatably inserted into inside chamber from side wall bolt hole to measure cathode test
Temperature in area or anode test section；Pressure sensor is rotatably inserted into inside chamber from closure stud hole to measure cathode test
Pressure in area or anode test section.All temperature sensor and pressure sensor are connected with host, realize on host real
When measurement and data save.Additionally, it is preferred that the rubber sleeve using thinner thickness wraps up all temperature sensor and pressure sensor.
When pressure test room is 2 or more, each pressure test room carries out temperature sensor according to the method described above
Laying with pressure sensor according to.
Step 3, install concrete sample: production concrete sample, concrete sample is preferably four prism type, is then conserved
For a period of time, so that the concrete sample length, width and height of of the right age phase are preferably 420mm*100mm*420mm.Conserve the concrete completed
Top, bottom and the two sides of test specimen are wrapped up with rubber waterproof material, are bonded closely with structure glue, and being rolled with iron rod keeps it viscous
It is bolted close.
Conserving the concrete sample completed resistivity in full water is preferably 1000 Ω m, preferably 109 Ω m when dry.
Then, carefully concrete sample is put into the test specimen fixed groove that step 1 is laid, in bottom after placing
Cemented again with structure glue with two sides, make it is closely coupled between concrete sample and test specimen fixed groove, formed concrete sample with
Sealing structure between chamber prevents the solution at yin-yang the two poles of the earth from intercommunication leakage occurs, keeps test result more acurrate.Positioned at concrete
The region of test specimen two sides is respectively anode test section and cathode test area.
When pressure test room is 2 or more, each pressure test room carries out concrete sample according to the method described above
Installation.
Step 4, be arranged support frame: one end of support frame is connected with the inner wall in cathode test area, support frame it is another
The concrete sample installed with step 3 is held to be connected.
Two stainless steel stents are preferably close using rubber sleeve package, in concrete sample position corresponding with chamber side wall
It sets and uses four high elastic rubber pedestals of structure gluing knot, a diameter of 50mm, high elastic rubber pedestal is provided with a certain size
Hole inserts in the hole stainless steel stent, and test specimen is by bending at crack when preventing anode test section from applying water pressure.
When pressure test room is 2 or more, each pressure test room is supported the peace of frame according to the method described above
Dress.
Step 5, installation test electrode: test electrode includes test anode and test cathode, and test anode is arranged in anode
In test section, and it is connected by conducting wire with the anode of external power supply；It tests cathode to be arranged in cathode test area, and by leading
Line is connected with the cathode of external power supply.Test anode is preferably the titanium alloy electrode plate for using single side oxide coating, size
Preferably Φ 50mm × 150mm；Testing cathode is preferably stainless steel plate, is preferably dimensioned to be Φ 50mm × 150mm, two electrode of yin-yang
Deionized water contact area is Φ 50mm × 150mm in plate and device.
When pressure test room is 2 or more, each pressure test room carries out test electrode according to the method described above
Installation.
Step 6, it injects conductive corrosion liquid: after experiment starts, being surveyed by pressure pipeline valve to anode test section and cathode
Examination area injects conductive corrosion liquid and then seals up top cover, all high pressure spiral shells to screw up with a wrench between top cover and chamber side wall
Bolt forms closed environment.
Above-mentioned conduction corrosion liquid is preferably the deionized water of pH=7.
When pressure test room is 2 or more, each pressure test room carries out conductive corrosion liquid according to the method described above
Injection.
Step 7, anode test section is pressurizeed: external pressure machine is opened, the conductive corrosion liquid pressurization into anode test section, when
When the pressure of conductive corrosion liquid in anode test section reaches setting pressure, external power switch is opened, voltage 60V is set, is opened
Electric accelerating concrete corrosion test under high hydraulic gradient when the setting pressure that begins.Host real-time detection pressure data, it is outer by adjusting
Portion's press machine makes pressure all-the-time stable near setup pressure value.
When pressure test room is three, the setting pressure in three pressure test rooms be preferably respectively 1.0MPa,
1.5MPa and 2.0MPa, naturally it is also possible to be other pressure, to carry out the research of different pressures.
It is of course also possible to change the temperature of each pressure test room or change the ingredient or different voltages of conductive corrosion liquid
Value, to carry out the testing research of different temperatures or different conductive corrosion liquid ingredients or different voltages value.
Step 8, sampling Detection: according to setting interval time, opening and closing drains the sealing valve on probe tube, thus to anode
Conductive corrosion liquid in test section and cathode test area is sampled detection, and judges the corrosion feelings of chamber inner concrete test specimen
Condition.
Step 9, it takes out concrete sample: after the test, opening chamber, take out concrete sample, observation corrosion feelings
Condition records data.It is compared by the result that multiple pressure test rooms obtain and obtains identical under other conditions, different waterpower
Influence of the gradient situation to concrete sample corrosion.Under the conditions of can also carrying out same hydraulic gradient, different voltages are to concrete
Influence of corrosion etc..
In conclusion the present invention can apply up to 1 ~ 2MPa water pressure, using pressure sensor monitoring water pressure and in due course
It adjusts to maintain pressure to stablize；Chamber is divided into three square body regions, can carry out simultaneously 3 groups of tests (at various pressures, no
With under water temperature, under different voltages etc.)；Chamber bottom plate, top plate and both sides side wall are respectively provided with groove, groove and test specimen contact portion
Position and outer rubber plastic class waterproof material of continuing to use wrap up, with structure gluing knot.To accelerate contact dissolution to test base in conventional electricity
The simulation of high hydraulic gradient environment is added on plinth, which, which overcomes traditional dissolved corrosion test, can not simulate high hydraulic gradient environment
The characteristics of, it can be more truly reflected the test mechanism of dam concrete corrosion, dam is run suitable for carrying out infiltration corrosion
The influence research of safety, there is good market to convert prospect, be suitble to promote.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail a variety of equivalents can be carried out to technical solution of the present invention within the scope of the technical concept of the present invention, this
A little equivalents all belong to the scope of protection of the present invention.
Claims (8)
1. electric accelerating concrete corrosion test method under a kind of high hydraulic gradient, characterized by the following steps:
Step 1, lay test specimen fixed groove: test specimen fixed groove is arranged in the middle part of pressure test room, and test specimen fixed groove includes
Homogeneous intercommunicated cap recess, bottom plate groove and two side walls groove are laid with rubber waterproof material in test specimen fixed groove, and
Using structure gluing knot, after rolled with iron rod and keep its bonding close；Region positioned at the two sides of concrete sample is respectively anode
Test section and cathode test area；
Step 2, mounting temperature sensor and pressure sensor: anode test section and cathode test area respectively lay a temperature sensing
Device and pressure sensor；All temperature sensor and pressure sensor are connected with host；
Step 3, install concrete sample: production concrete sample simultaneously conserves, and the concrete sample for conserving completion is put into step 1 cloth
If test specimen fixed groove in, and cemented, made between concrete sample and test specimen fixed groove with structure glue in bottom and two sides
Form sealing structure；
Step 4, be arranged support frame: one end of support frame is connected with the inner wall in cathode test area, the other end of support frame and
The concrete sample that step 3 is installed is connected；
Step 5, installation test electrode: test electrode includes test anode and test cathode, and the setting of test anode is tested in anode
Qu Zhong, and be connected by conducting wire with the anode of external power supply；Test cathode be arranged in cathode test area, and by conducting wire with
The cathode of external power supply is connected；
Step 6, inject conductive corrosion liquid: anode test section and cathode test area inject conductive corrosion liquid and then seal up top
Lid, makes top cover be connected with the side wall of chamber using high-pressure bolt, forms closed environment；
Step 7, anode test section is pressurizeed: opening external pressure machine, anode is worked as in the conductive corrosion liquid pressurization into anode test section
When the pressure of conductive corrosion liquid in test section reaches setting pressure, external power switch is opened, voltage 60V is set, starts to set
Electric accelerating concrete corrosion test under high hydraulic gradient when constant-pressure；
Step 8, sampling Detection: according to setting interval time, opening and closing drains the sealing valve on probe tube, to test anode
Conductive corrosion liquid in area and cathode test area is sampled detection, and judges the corrosion condition of chamber inner concrete test specimen；
Step 9, it takes out concrete sample: after the test, opening chamber, take out concrete sample, observe corrosion condition, note
Record data.
2. electric accelerating concrete corrosion test method under high hydraulic gradient according to claim 1, it is characterised in that: step
In 1, have in chamber there are three the pressure test room being parallel to each other, each pressure test room is according to the side of step 1 to step 7
Method is operated, and in step 7, the setting pressure in three pressure test rooms is respectively 1.0MPa, 1.5MPa and 2.0MPa.
3. electric accelerating concrete corrosion test method under high hydraulic gradient according to claim 1, it is characterised in that: step
In 5, test anode is the titanium alloy electrode plate using single side oxide coating, and test cathode is stainless steel plate.
4. electric accelerating concrete corrosion test method under high hydraulic gradient according to claim 1, it is characterised in that: test
At least one pressure test room is provided in case, the inner wall of pressure test room is insulating surface；External pressure machine and pressure
Pipeline is connected, and the other end of pressure pipeline protrudes into the conductive corrosion liquid in anode test section；Anode test section and cathode are surveyed
The bottom in examination area is provided with draining probe tube.
5. electric accelerating concrete corrosion test method under high hydraulic gradient according to claim 4, it is characterised in that: support
Frame includes two stainless steel stents being parallel to each other, and a high elastic rubber pedestal is arranged in the both ends of every stainless steel stent,
The periphery of every stainless steel stent coats rubber sleeve.
6. electric accelerating concrete corrosion test method under high hydraulic gradient according to claim 4, it is characterised in that: test
There are three the pressure test room being parallel to each other, each pressure test room is square shape for setting in case.
7. electric accelerating concrete corrosion test method under high hydraulic gradient according to claim 4, it is characterised in that: test
Case is made of stainless steel, and the inner wall of chamber is coated with electrostatic insulating coating.
8. electric accelerating concrete corrosion test method under high hydraulic gradient according to claim 4, it is characterised in that: conductive
Corrosion liquid is the deionized water of pH=7.
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| CN114002273A (en) * | 2021-10-29 | 2022-02-01 | 河海大学 | Concrete degradation process monitoring device and monitoring method thereof |
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|---|---|---|---|---|
| US5137608A (en) * | 1989-11-30 | 1992-08-11 | Board Of Supervisors Of Louisiana State University And Agricultural And Mechanical College | Electrochemical decontamination of soils or slurries |
| CN101393194A (en) * | 2008-10-23 | 2009-03-25 | 河海大学 | Test methods and apparatus for accelerating concrete corrosion by electrochemical method |
| KR101207341B1 (en) * | 2010-06-22 | 2012-12-04 | 한국방사성폐기물관리공단 | Method for testing deterioration of sturcture and system for the same |
| CN204461974U (en) * | 2015-04-16 | 2015-07-08 | 山东省水利科学研究院 | A kind of plastic concrete infiltration dissolved corrosion test pressure chamber parts |
| CN105203449B (en) * | 2015-10-13 | 2018-01-02 | 东南大学 | The corrosion pond that steel bar corrosion is tested in a kind of reinforcing steel |
| CN105548319A (en) * | 2015-12-07 | 2016-05-04 | 哈尔滨工业大学 | Electrochemical accelerated concrete hydration product corrosion measurement device |
| CN206638202U (en) * | 2017-02-25 | 2017-11-14 | 天津市国盛工程造价咨询有限公司 | A kind of concrete and reinforcing bar inspection accurate calibration device |
| CN106980014B (en) * | 2017-04-27 | 2017-12-12 | 河海大学 | Simulate concrete for hydraulic structure corrosion deterioration test device and method under high hydraulic gradient |
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2017
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