CN107941688A - 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
- Publication number
- CN107941688A CN107941688A CN201711456388.6A CN201711456388A CN107941688A CN 107941688 A CN107941688 A CN 107941688A CN 201711456388 A CN201711456388 A CN 201711456388A CN 107941688 A CN107941688 A CN 107941688A
- Authority
- CN
- China
- Prior art keywords
- test
- anode
- pressure
- cathode
- concrete
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/02—Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental & Geological Engineering (AREA)
- Environmental Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses electric accelerating concrete corrosion experimental rig and method under a kind of high hydraulic gradient, including chamber, external pressure machine, external power supply and test electrode；At least one pressure test room is provided with 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；Test cathode is 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 is stretched into the conductive corrosion liquid in anode test section；The bottom in anode test section and cathode test area is both 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 concrete dissolved corrosion test research.
Description
Technical field
The present invention relates to electric accelerating concrete corrosion experimental rig under simulation test field, particularly a kind of high hydraulic gradient
And method.
Background technology
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
With separated out 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 precipitation effect of the infiltration current to ion is much larger than dense
The diffusion caused by difference is spent, degradation speed compares the contact dissolution of the components such as gate pier, bridge pier faster.Now, it is 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 is had an accident, and very harmful, the corrosion durability under the especially high hydraulic gradient of durability of its concrete is that high dam engineering is long-term
The major issue that can not be ignored during safe operation.
Existing concrete dissolved corrosion test research, accelerate corrosion process method have chemical solution etching and electricity accelerate it is molten
Etching method, chemical solution, which corrodes, uses ammonium nitrate solution, but ammonium nitrate is a kind of high explosives, is not easy to obtain and extremely endanger
Danger, needs not stopping to be passed through ammonia, to keep solution ph stability during corrosion.Ammonia has penetrating odor, tests process
In be difficult to holding and be fully sealed, adverse effect is easily 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 use it for oozing
Saturating dissolved corrosion test.
The content 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 is studied.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
Electric accelerating concrete corrosion experimental rig under a kind of high hydraulic gradient, including chamber, external pressure machine, external power supply and
Test electrode.
At least one pressure test room is provided with chamber, the internal face of pressure test room is insulating surface；Pressure
Test specimen fixed groove is provided with the middle part of test cabinet, the surrounding of concrete sample can be sealed with test specimen fixed groove to be coordinated, 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 tests cloudy
Pole, test anode is arranged in anode test section, and is connected by conducting wire with the anode of external power supply；Test cathode is arranged on
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 stretches into the conductive corrosion in anode test section
In liquid；The bottom in anode test section and cathode test area is both provided with draining probe tube.
Cathode test area is provided with the supporting rack for being used to support concrete sample.
Supporting rack includes two stainless steel stents being parallel to each other, and respectively setting one is high-elastic at the both ends of every stainless steel stent
Property rubber earring moulding, the periphery of every stainless steel stent coats rubber sleeve.
Temperature sensor and pressure sensor are both provided with anode test section and cathode test area.
Three pressure test being parallel to each other rooms are provided with chamber, each pressure test room is square shape.
Chamber is made of stainless steel material, and the internal face 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 electric accelerating concrete corrosion test method 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
Influence, correlation test data can be measured, carry out concrete dissolved corrosion test research.
Electric accelerating concrete corrosion test method, includes the following steps under a kind of high hydraulic gradient.
Step 1, test specimen fixed groove is laid：The middle part of pressure test room sets test specimen fixed groove, test specimen fixed groove
Including homogeneous intercommunicated cap recess, bottom plate groove and two side walls groove, rubber waterproof material is laid with test specimen fixed groove
Material, and use structure gluing knot, after roll that to bond it close with iron rod.
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, concrete sample is installed：Make concrete sample and conserve, the concrete sample for conserving completion is put into step
In the rapid 1 test specimen fixed groove laid, and cemented in bottom with both sides with structure glue, make concrete sample and test specimen fixed groove
Between form sealing structure；Region positioned at the both sides of concrete sample is respectively anode test section and cathode test area.
Step 4, supporting rack is set：One end of supporting rack is connected with the internal face in cathode test area, supporting rack it is another
The concrete sample installed with step 3 is held to be connected.
Step 5, installation test electrode：Testing electrode includes test anode and test cathode, and test anode is arranged on anode
In test section, and it is connected by conducting wire with the anode of external power supply；Test cathode is arranged in cathode test area, and by leading
Line is connected with the cathode of external power supply.
Step 6, conductive corrosion liquid is injected：Conductive corrosion liquid is injected in anode test section and cathode test area, then, seals up
Head cover, makes head 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 experiment under high hydraulic gradient during the setting pressure that begins.
Step 8, sampling Detection：According to setting interval time, the sealing valve on draining probe tube is opened and closed, so as 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, concrete sample is taken out：After the test, chamber is opened, takes out concrete sample, observation corrosion feelings
Condition, records data.
In step 1, there are three pressure test rooms being parallel to each other, each pressure test room is according to step in chamber
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 present invention has the advantages that：
1st, the present invention can provide concrete for hydraulic structure test specimen high hydraulic gradient infiltration corrosion environment, and can provide and stablize electrochemical potential
Can, accelerate the rate travel of calcium ion in pore solution, the dissolved corrosion test that electricity under high hydraulic gradient accelerates concrete can be carried out.
2nd, conventional dissolved corrosion test is carried out in the plastics corrosion groove do not closed, this experimental rig is the stainless of closing
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 meet to simulate completely High Concrete Dam, the high hydraulic gradient work residing for face dam concrete seepage-proofing body up to 2000
Condition.
3rd, how soon Conventional contact corrosion and infiltration dissolved corrosion test cycle length, 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.
4th, the test specimen fixed groove that chamber of the present invention is set, energy fixing concrete test specimen, while use rubber waterproof material
Parcel, is bonded closely with structure glue, forms the sealing structure between concrete sample and chamber, effectively prevent negative and positive the two poles of the earth
Intercommunication leakage occurs for solution, makes result of the test more accurate.
5th, the concrete sample under high hydraulic gradient effect, larger water pressure is born in anode test section, is also easy to produce
Flexural deformation, causes opening, the closure of local hole, influences infiltration coefficient and diffusion coefficient, result of the test is produced 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
Effectively prevent concrete sample damage cracking after corrosion deterioration, make result of the test more accurate.
6th, this experimental rig can carry out the concrete for hydraulic structure corrosion under different water pressures, different voltages conditional combination operating mode
Experiment, can monitor water pressure, solution temperature in real time during experiment, can be by monitoring the change of anode and cathode lateral water pressure
To verify the working status of sealing device, after chamber hydraulic pressure reduces, pressure water can be injected by inlet valve door, mended
Pressurising power, the present apparatus can erode solution sampling in anode and cathode side outlet valve, attack solution during research corrosion
Change.
Brief description of the drawings
Fig. 1 shows the structure diagram of electric accelerating concrete corrosion experimental rig under a kind of high hydraulic gradient of the present invention.
Fig. 2 shows the structure diagram of head cover.
Fig. 3 shows the structure diagram of chamber.
Wherein have：1. external power supply；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. head 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 draining probe tube；22. rubber waterproof material；23. anode test section；24. cathode test area；
25. polymer insulation coating；26. cathode test area draining probe tube；27. cathode test area sealing valve；28. pressure test room
One；29. pressure test room two；30. pressure test room three.
Embodiment
The present invention is described in further detail with specific better embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, electric accelerating concrete corrosion experimental rig under a kind of high hydraulic gradient, including chamber, exterior pressure
Power machine 11, external power supply 2 and test electrode.
At least one pressure test room is provided with chamber, preferably 3 pressure test rooms, the quantity of pressure test room
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
28th, pressure test room 2 29 and pressure test room 3 30.3 pressure test rooms can be carried out at the same time 3 groups of experiments, be controlled variable
Experiment, 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 two or more, experiment
Case is preferably cuboid, and each pressure test room is both preferably square shape.
As shown in figure 3, the preferred size of chamber is long 1300mm, and the large-scale cuboid of high 450mm, wide 450mm, 3
Pressure test room is laid along 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 material, and the internal face of chamber is preferably applied by the way of electrostatic coating
The electrostatic insulating coating of 2mm is covered with, forms insulating surface, prevents inner wall from electrochemical reaction occurs in experiment, makes experimental result
It is more accurate.Above-mentioned electrostatic insulating coating is preferably polymer insulation coating 25.
Chamber includes chamber side wall 17, bottom plate 19 and head cover 13, and bottom plate is preferably to be wholely set with chamber side wall,
The structure of head cover is as shown in Fig. 2, head cover is preferably sealedly and fixedly connected by being arranged on the high-pressure bolt of surrounding with chamber side wall.
The internal face of above-mentioned chamber includes the internal face of chamber side wall, plate upper surface and head cover lower surface.
Test specimen fixed groove is provided with the middle part of pressure test room, the surrounding of concrete sample 18 can be with test specimen fixed groove
Sealing coordinates, 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；Test cathode is arranged in cathode test area, and passes through conducting wire and the moon of external power supply
Pole is connected.
It is preferably the titanium alloy electrode plate using single side oxide coating to test anode, 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 can also be other known corrosion liquid.
External pressure machine is connected with pressure pipeline 14, and the other end of pressure pipeline is through stretching into sun after the through hole on head cover
In conductive corrosion liquid in the test section of pole, the present invention provides the hydraulic pressure of stabilization using external pressure machine for chamber, forms Gao Shui
Power gradient environment.Pressure pipeline valve 12 is provided with pressure pipeline.
The bottom of anode test section is provided with draining probe tube 21, and sealing valve 20 is provided with draining probe tube.Cathode
The bottom of test section is provided with draining probe tube 26, and sealing valve 27 is provided with draining probe tube.Cathode test area is provided with
The supporting rack of concrete sample is used to support, prevents when anode test section from applying water pressure concrete sample by bending into crack.
Above-mentioned supporting rack 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 put, the periphery of every stainless steel stent coats rubber sleeve.Every stainless steel stent is preferably long
For 150mm, a diameter of 30mm.High elastic rubber pedestal is preferably adhesive on concrete sample or chamber side wall using structure,
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 with 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, test specimen fixed groove is laid：Head cover is first opened, all high-pressure bolts on head cover are unscrewed with spanner, are taken out
Head cover；Test specimen fixed groove is then set at the middle part of pressure test room, and test specimen fixed groove includes homogeneous intercommunicated head 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 and it is tightly bonded
It is close.
This step wherein, preferably has three pressure test rooms being parallel to each other in chamber, 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 experiments can be thus carried out at the same time, such as in different pressures
Under, it is efficiently convenient under different voltages, under different electrolyte solution 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, are realized on host real
When measurement and data preserve.Additionally, it is preferred that all temperature sensor and pressure sensor are wrapped up using the rubber sleeve of thinner thickness.
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, concrete sample is installed：Concrete sample is made, 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 both sides of test specimen are wrapped up with rubber waterproof material, are bonded closely with structure glue, and being rolled with iron rod makes it viscous
It is bolted close.
It is preferably 1000 Ω m to conserve the concrete sample completed resistivity in full water, 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 both 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 negative and positive the two poles of the earth from intercommunication leakage occurs, makes result of the test more accurate.Positioned at concrete
The region of test specimen both 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, supporting rack is set：One end of supporting rack is connected with the internal face in cathode test area, supporting rack 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 parcel, in concrete sample position corresponding with chamber side wall
Put and use four high elastic rubber pedestals of structure gluing knot, its a diameter of 50mm, high elastic rubber pedestal is provided with a certain size
Hole, stainless steel stent is inserted in the hole, and prevents when anode test section from applying water pressure test specimen by bending into crack.
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：Testing electrode includes test anode and test cathode, and test anode is arranged on anode
In test section, and it is connected by conducting wire with the anode of external power supply；Test cathode is arranged in cathode test area, and by leading
Line is connected with the cathode of external power supply.Anode is tested preferably using the titanium alloy electrode plate of single side oxide coating, size
Preferably Φ 50mm × 150mm；It is preferably stainless steel plate to test cathode, is preferably dimensioned to be Φ 50mm × 150mm, two electrode of negative and positive
Plate is Φ 50mm × 150mm with deionized water contact area in 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, conductive corrosion liquid is injected：After experiment starts, surveyed by pressure pipeline valve to anode test section and cathode
The conductive corrosion liquid of area's injection is tried, then, seals up head cover, all high pressure spiral shells to screw up with a wrench between head 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 experiment under high hydraulic gradient during the setting pressure that begins.Host detects pressure data in real time, outer by adjusting
Portion's forcing press 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, so as 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 component or different voltages of conductive corrosion liquid
Value, so as to carry out different temperatures or different conductive corrosion liquid components or the testing research of different voltages value.
Step 8, sampling Detection：According to setting interval time, the sealing valve on draining probe tube is opened and closed, so as 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, concrete sample is taken out：After the test, chamber is opened, takes out concrete sample, observation corrosion feelings
Condition, records data.The result obtained by multiple pressure test rooms carries out contrast and draws 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, which can apply, is up to 1 ~ 2MPa water pressures, using pressure sensor monitoring water pressure and in due course
Adjust to maintain pressure stability；Chamber is divided into three square body regions, can be carried out at the same time 3 groups of experiments（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 site
Position and outer rubber plastic class waterproof material of continuing to use wrap up, with structure gluing knot.So as to accelerate contact dissolution experiment 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 more truly reflect the experiment mechanism of dam concrete corrosion, dam is run suitable for carrying out infiltration corrosion
The influence research of safety, has good market conversion prospect, is adapted to promote.
The preferred embodiment of the present invention described in detail above, still, during present invention is not limited to the embodiments described above
Detail, in the range of the technology design of the present invention, a variety of equivalents can be carried out to technical scheme, this
A little equivalents belong to protection scope of the present invention.
Claims (10)
- A kind of 1. electric accelerating concrete corrosion experimental rig under high hydraulic gradient, it is characterised in that：Including chamber, external pressure Machine, external power supply and test electrode；At least one pressure test room is provided with chamber, the internal face of pressure test room is insulating surface；Pressure test Test specimen fixed groove is provided with the middle part of room, the surrounding of concrete sample can be sealed with test specimen fixed groove to be coordinated, and concrete Pressure test room is divided into anode test section and cathode test area by test specimen；Testing electrode includes test anode and test cathode, Test anode is arranged in anode test section, and is connected by conducting wire with the anode of external power supply；Test cathode is arranged on the moon In the test section of pole, 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 stretches into the conductive corrosion liquid in anode test section In；The bottom in anode test section and cathode test area is both provided with draining probe tube.
- 2. electric accelerating concrete corrosion experimental rig under high hydraulic gradient according to claim 1, it is characterised in that：Cathode Test section is provided with the supporting rack for being used to support concrete sample.
- 3. electric accelerating concrete corrosion experimental rig under high hydraulic gradient according to claim 2, it is characterised in that：Support Frame includes two stainless steel stents being parallel to each other, and the both ends of every stainless steel stent respectively set a high elastic rubber pedestal, The periphery of every stainless steel stent coats rubber sleeve.
- 4. electric accelerating concrete corrosion experimental rig under high hydraulic gradient according to claim 1, it is characterised in that：Anode Temperature sensor and pressure sensor are both provided with test section and cathode test area.
- 5. electric accelerating concrete corrosion experimental rig under high hydraulic gradient according to claim 1, it is characterised in that：Experiment Three pressure test being parallel to each other rooms are provided with case, each pressure test room is square shape.
- 6. electric accelerating concrete corrosion experimental rig under high hydraulic gradient according to claim 1, it is characterised in that：Experiment Case is made of stainless steel material, and the internal face of chamber is coated with electrostatic insulating coating.
- 7. electric accelerating concrete corrosion experimental rig under high hydraulic gradient according to claim 1, it is characterised in that：It is conductive Corrosion liquid is the deionized water of pH=7.
- A kind of 8. electric accelerating concrete corrosion test method under high hydraulic gradient, it is characterised in that：Include the following steps：Step 1, test specimen fixed groove is laid：The middle part of pressure test room sets test specimen fixed groove, 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 roll that to bond it close with iron rod；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, concrete sample is installed：Make concrete sample and conserve, 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 with both sides in bottom Form sealing structure；Region positioned at the both sides of concrete sample is respectively anode test section and cathode test area；Step 4, supporting rack is set：One end of supporting rack is connected with the internal face in cathode test area, the other end of supporting rack with The concrete sample that step 3 is installed is connected；Step 5, installation test electrode：Testing electrode includes test anode and test cathode, and test anode is arranged on anode test 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, conductive corrosion liquid is injected：Conductive corrosion liquid is injected in anode test section and cathode test area, then, seals up top Lid, makes head 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, works as anode 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 experiment under high hydraulic gradient during constant-pressure；Step 8, sampling Detection：According to setting interval time, the sealing valve on draining probe tube is opened and closed, so as 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, concrete sample is taken out：After the test, chamber is opened, takes out concrete sample, observes corrosion condition, note Record data.
- 9. electric accelerating concrete corrosion test method under high hydraulic gradient according to claim 8, it is characterised in that：Step In 1, there are three pressure test rooms being parallel to each other, each pressure test room is according to the side of step 1 to step 7 in chamber Method is operated, and in step 7, the setting pressure in three pressure test rooms is respectively 1.0MPa, 1.5MPa and 2.0MPa.
- 10. electric accelerating concrete corrosion test method under high hydraulic gradient according to claim 8, it is characterised in that：Step In rapid 5, test anode is the titanium alloy electrode plate using single side oxide coating, and test cathode is stainless steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711456388.6A CN107941688B (en) | 2017-12-28 | 2017-12-28 | Electric accelerating concrete corrosion experimental rig and method under a kind of high hydraulic gradient |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711456388.6A CN107941688B (en) | 2017-12-28 | 2017-12-28 | Electric accelerating concrete corrosion experimental rig and method under a kind of high hydraulic gradient |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107941688A true CN107941688A (en) | 2018-04-20 |
| CN107941688B CN107941688B (en) | 2019-09-03 |
Family
ID=61939527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711456388.6A Active CN107941688B (en) | 2017-12-28 | 2017-12-28 | Electric accelerating concrete corrosion experimental rig and method under a kind of high hydraulic gradient |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107941688B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760840A (en) * | 2018-05-04 | 2018-11-06 | 太原理工大学 | A kind of the percolation type experimental rig and method of soft rock electrochemical modification |
| CN114002273A (en) * | 2021-10-29 | 2022-02-01 | 河海大学 | Concrete degradation process monitoring device and monitoring method thereof |
| WO2024012393A1 (en) * | 2022-07-13 | 2024-01-18 | 东南大学 | Device for simulating calcium ion dissolution and chloride ion diffusion conditions of cement-based material in underwater area |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| KR20110138823A (en) * | 2010-06-22 | 2011-12-28 | 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 |
| CN105203449A (en) * | 2015-10-13 | 2015-12-30 | 东南大学 | Corrosion tank for reinforcing bar corrosion testing in simulated concrete pore solution |
| CN105548319A (en) * | 2015-12-07 | 2016-05-04 | 哈尔滨工业大学 | Electrochemical accelerated concrete hydration product corrosion measurement device |
| CN106980014A (en) * | 2017-04-27 | 2017-07-25 | 河海大学 | Simulate concrete for hydraulic structure corrosion deterioration test device and method under high hydraulic gradient |
| 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 |
-
2017
- 2017-12-28 CN CN201711456388.6A patent/CN107941688B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| KR20110138823A (en) * | 2010-06-22 | 2011-12-28 | 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 |
| CN105203449A (en) * | 2015-10-13 | 2015-12-30 | 东南大学 | Corrosion tank for reinforcing bar corrosion testing in simulated concrete pore solution |
| 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 |
| CN106980014A (en) * | 2017-04-27 | 2017-07-25 | 河海大学 | Simulate concrete for hydraulic structure corrosion deterioration test device and method under high hydraulic gradient |
Non-Patent Citations (3)
| Title |
|---|
| HIROSHI SAITO等: "Leaching tests on different mortars using accelerated electrochemical method", 《CEMENT AND CONCRETE RESEARCH》 * |
| N ERINEJ. CHEREPY: "Electrolyte Management for Effective Long-Term Electro-Osmotic Transport in Low-Permeability Soils", 《ENVIRON. SCI. TECHNOL》 * |
| 阮燕等: "碾压混凝土( RCC) 在不同水力梯度下渗透和溶蚀特性研究", 《武汉大学学报( 工学版)》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760840A (en) * | 2018-05-04 | 2018-11-06 | 太原理工大学 | A kind of the percolation type experimental rig and method of soft rock electrochemical modification |
| CN114002273A (en) * | 2021-10-29 | 2022-02-01 | 河海大学 | Concrete degradation process monitoring device and monitoring method thereof |
| WO2024012393A1 (en) * | 2022-07-13 | 2024-01-18 | 东南大学 | Device for simulating calcium ion dissolution and chloride ion diffusion conditions of cement-based material in underwater area |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107941688B (en) | 2019-09-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106680129B (en) | Rock sample recycles the simulation of dry and wet freezing-thawing and damage deterioration test device | |
| CN107941688B (en) | Electric accelerating concrete corrosion experimental rig and method under a kind of high hydraulic gradient | |
| CN105568955B (en) | The compound straight-line vacuum pre-pressed joint method experimental rig of EKG electro-osmosis methods and method | |
| CN110455646A (en) | A kind of visualization interface direct shear apparatus being contemplated that temperature, seepage effect | |
| CN108008116B (en) | Vacuum preloading and electroosmosis combined test device | |
| CN203732408U (en) | Testing device for permeation coefficient of pervious concrete | |
| CN206523391U (en) | Rock sample circulation dry and wet freezing-thawing simulation and damage deterioration test device | |
| CN103293093B (en) | Deep-sea stress corrosion with ooze hydrogen experimental simulation device | |
| CN103969282A (en) | Test device for making research on soil freezing and thawing temperature field, water migration and deformation law | |
| CN103822875A (en) | Device and method for testing energy pile-soil contact surface frictional force | |
| CN103792182B (en) | A kind of double-electrolyzer and application of simulating underdeposit corrosion | |
| CN102980839B (en) | Device and method for determination of permeability coefficient of chloride ions in concrete | |
| CN109030336A (en) | Study the device of acid gas well Special threading connector torque shoulder face corrosion damage | |
| CN105973698A (en) | Method and device for measuring resistivity in compression creep process of low-temperature rocks | |
| CN113640097B (en) | Constant-temperature stress corrosion device and test method for multi-anchor-body test piece | |
| CN105938085A (en) | Electrochemical experiment method and device for measuring corrosion resistance of rust-layer material | |
| CN105181549A (en) | Test system and method for testing seepage and solidification time characteristic of grouting | |
| CN107655743B (en) | A kind of geotechnical engineering adds off-load comprehensive simulation cabinet and operating method | |
| CN212622106U (en) | Building waterproof material performance detection device | |
| CN103557994A (en) | External window side seam waterproof detection method and detection device | |
| CN106644255A (en) | Closed hydraulic type earth pressure cell calibration device and calibration method | |
| CN113049628A (en) | Swelling soil wet swelling-frost heaving force combined tester | |
| CN112113825A (en) | Multi-anchor-rod corrosion test device and method applying prestress | |
| CN106706498A (en) | Steady state water permeability coefficient testing device and method of concrete type material | |
| CN109211761B (en) | Test device and method for simulating influence of subway stray current on concrete durability |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |