CN109211761A - The experimental rig and method that simulation metro stray current influences concrete durability - Google Patents
The experimental rig and method that simulation metro stray current influences concrete durability Download PDFInfo
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Abstract
The invention discloses a kind of experimental rig that simulation metro stray current influences concrete durability and methods, the device includes environmental cabinet, AC power source, first resistor case, second resistance case, AC current transducer, current curve recorder and temperature and humidity control instrument, first titanium plate, the second titanium plate, water-absorbing sponge, concrete sample, it is embedding in concrete sample to have reinforcing bar, anode, the cathode of adjustable pressure stabilizing AC power source are electrically connected the both ends of second titanium plate, and cathode is also connect with reinforcing bar and the first titanium plate respectively；AC current transducer is connect with current curve recorder, and the conducting wire for connecting cathode with reinforcing bar passes through AC current transducer；The first resistor case is connected between the anode of AC power source, the second titanium plate, and the second resistance case is connected between the cathode of AC power source, the second titanium plate.Experimental rig of the present invention using safe, low in cost, structure is simple, it is easy to maintain and can be fully achieved experimental design requirement.
Description
Technical field
The invention belongs to material corrosion science and technology fields, and in particular to a kind of simulation metro stray current is resistance to concrete
The experimental rig and method that long property influences, to carry out reinforced concrete structure by the phase of the galvanic corrosion in laboratory
Close research.
Background technique
Since traction generator is applied in underground railway track traffic system, occurred as soon as not during metro operation
Few problems caused by stray current corrosion: if the Shanghai tunnel Da Pulu is because leaking closing due to overhaul, Beijing Metro tunnel
Inner water tube is perforated because of corrosion, and Hongkong Subway causes gas tank perforation leakage etc. because of stray current corrosion；For tunnel and bury
Buried structure as ground pipeline, stray electrical current are one of damage forms of most serious.
In early 20th century at the end of the 19th century, with the development of electrical haulage technological revolution, the world be faced with due to stray electrical current and
Caused accelerated corrosion；1887, a rail electricity of the first serious stray current corrosion case in the U.S.'s in Brooklyn
Occur in vehicle system；1893 in Britain and the stray electrical caused by Melbourne reports the similar operation due to electric car in 1916
Stream corrosion case；1904, the stray electrical current of electric railway influenced to result in the corrosion of the buried structure of Germany；Foreign scholar
Santi has strong corrosiveness to pipeline regional area by field demonstration stray electrical current.These all show ground
Iron engineering structure anti-stray current corrosion durable problem be one it is particularly significant and there is an urgent need to solve, have mirror
In this, stray electrical current is carried out to subway reinforced concrete structure by the research of stray current corrosion, for research and development ground in laboratory
Iron construction anti-stray current corrosion new technology and research structure of the subway endurance issues are of great significance.
The experimental rig of stray current corrosion subway reinforced concrete structure in the prior art is fairly simple, although can
With from macroscopically carrying out simulation test, but test effect and actual conditions have bigger gap.
Summary of the invention
The object of the present invention is to provide a kind of experimental rig that simulation metro stray current influences concrete durability with
Method, experimental enviroment is closer to actual conditions, so that test effect is more consistent with truth.
In order to realize above-mentioned task, the invention adopts the following technical scheme:
A kind of simulation metro stray current experimental rig that concrete durability is influenced, including environmental cabinet, outside environmental cabinet
It is bent that portion is provided with adjustable pressure stabilizing AC power source, first resistor case, second resistance case, punched-type AC current transducer, electric current
Line recorder and temperature and humidity control instrument, environmental cabinet are internally provided with the first titanium plate, the second titanium plate, water-absorbing sponge, in which:
Soil is housed in the environmental cabinet, is provided with concrete sample on soil, it is embedding in concrete sample to have steel
The water suction is arranged on the top surface of concrete sample in muscle, embedding first titanium plate in the soil below concrete sample
Sponge, water-absorbing sponge are in water-saturated state and concrete sample top surface are completely covered；Second titanium plate is placed on water suction sea
Continuous top；The temperature and humidity control instrument is connect with environmental cabinet, and the probe of temperature and humidity control instrument is set in the soil；
Anode, the cathode of the adjustable pressure stabilizing AC power source are electrically connected the both ends of second titanium plate, and can
The cathode of mode pressure stabilizing AC power source is also connect with reinforcing bar and the first titanium plate respectively；The punched-type AC current transducer
The conducting wire for connecting with current curve recorder, and connecting the cathode of adjustable pressure stabilizing AC power source with reinforcing bar is handed over across punched-type
Galvanic electricity flow transmitter；The first resistor case is connected between the anode of adjustable pressure stabilizing AC power source, the second titanium plate, described
Second resistance case be connected between the cathode of adjustable pressure stabilizing AC power source, the second titanium plate.
Further, the concrete sample lower part is protruded into the soil, and the surface of soil is tried higher than concrete
The absolute altitude of sample bottom surface is 10mm~20mm.
Further, first titanium plate and the spacing of concrete sample bottom surface are 10mm~20mm, the water suction
Sponge with a thickness of 10mm~20mm.
Further, the environmental cabinet is the hollow rectangular box with case lid.
A kind of test method that simulation metro stray current influences concrete durability, comprising the following steps:
Step 1, concrete sample is prepared, reinforcing bar is embedded in concrete sample in the preparation；
Step 2, the case lid for opening environmental cabinet fills soil into environmental cabinet, and the first titanium plate is placed in soil, then
Concrete sample is placed on soil, soil is continued to fill up, the surface of soil is made to be higher than the absolute altitude of concrete sample bottom surface
The spacing of 10mm~20mm, the first titanium plate and concrete sample bottom surface is 10mm~20mm；
Step 3, the water-absorbing sponge in water-saturated state is placed in concrete sample top, water-absorbing sponge is completely covered
Then second titanium plate is placed on water-absorbing sponge by concrete sample top surface again；
Step 4, by the string holes on environmental cabinet side wall, anode, the cathode of adjustable pressure stabilizing AC power source are made using conducting wire
The both ends of second titanium plate are separately connected, the cathode of adjustable pressure stabilizing AC power source is also respectively connected with reinforcing bar and the first titanium
Plate；Connect punched-type AC current transducer with current curve recorder, and make the cathode of adjustable pressure stabilizing AC power source with
The conducting wire of reinforcing bar connection passes through punched-type AC current transducer；The first resistor case is connected on adjustable pressure stabilizing alternating current
Between the anode in source, the second titanium plate, the second resistance case is connected on the cathode of adjustable pressure stabilizing AC power source, the second titanium plate
Between；Temperature and humidity control instrument is connect with environmental cabinet, is set to the probe of temperature and humidity control instrument in the soil；
Closure case lid is simultaneously sealed, while to being sealed at string holes；
Step 5, the temperature and humidity in environmental cabinet is adjusted using temperature and humidity control instrument and reach humiture setting value, start adjustable
Then pressure stabilizing AC power source observes the current strength change curve of stray electrical current in current curve recorder, while adjusting the
One resistance box, second resistance case make the wave crest of the change curve of alternative stray current near current setting value when, stop adjust,
The state is kept until reaching the test determination time, is then turned off pressure stabilizing AC power source, takes out concrete sample.
Further, described to prepare concrete sample, reinforcing bar is embedded in concrete sample in the preparation, comprising:
Specimen Design is cube concrete sample of the 150mm × 150mm × 150mm with reinforcing bar, then pours coagulation
Soil sample, so that parallel reinforced steel bar is in concrete sample bottom surface, and with apart from concrete sample bottom surface 45mm, bar diameter is
20mm, length 20cm, in concrete sample, there are the exposed area of 10cm length, rest part pyrocondensations on reinforcing bar
Seal of tube processing, reinforcing bar one end pre-terminated stretch out the conducting wire of concrete sample, then two ends of reinforcing bar are close using epoxy resin
Envelope；
After the completion of concrete sample pours, it is put into standard curing room and conserves 28 days, then natural curing was to 90 days, to intensity
It is taken out after stabilization, smears epoxy resin respectively on four sides of concrete sample, for use.
Further, the current setting value is 30mA/dm2。
The present invention has following technical characterstic compared with prior art:
1. apparatus of the present invention really reflect the generation and transmission path of stray electrical current in actual conditions, protrusion is embodied
Stray electrical current loss from the proprietary circuit of traction generator goes out to enter the process of reinforced concrete structure and in concrete
The electric field form that inside is formed, small range fluctuates the current strength of monitoring discovery stray electrical current back and forth near design value, with
Actual conditions are consistent.
2. process of the reinforced concrete structure by subway the galvanic corrosion in analog Practical Project of the present invention.
3. the current strength changing rule of the measurable stray electrical current of the present invention reflects structure of the subway by stray electrical current with this
The risk quantitative target of corrosion；With features simple structure, it is low in cost, easy to operate, use safe and maintenance readily special
Point.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of experimental rig of the present invention；
Fig. 2 is underground railway track traffic stray electrical current transmission path figure；
Fig. 3 is the direction change schematic diagram of stray electrical current when railcar moves；
In figure: 1 adjustable pressure stabilizing AC power source, the anode of 2 adjustable pressure stabilizing AC power sources, 3 adjustable pressure stabilizing alternating currents
The cathode in source, 4 first resistor casees, 5 second titanium plates, 6 water-absorbing sponges, 7 concrete samples, 8 reinforcing bars, 9 soil, the exchange of 10 punched-types
Current transducer, 11 second resistance casees, 12 first titanium plates, 13 current curve recorders, 14 temperature and humidity control instruments, 15 environmental cabinets.
Specific embodiment
The invention discloses a kind of experimental rigs that simulation metro stray current influences concrete durability, including environment
Case 15 is provided with adjustable pressure stabilizing AC power source 1, first resistor case 4, second resistance case 11, punched-type outside environmental cabinet 15 and hands over
Galvanic electricity flow transmitter 10, current curve recorder 13 and temperature and humidity control instrument 14, environmental cabinet 15 are internally provided with the first titanium plate
12, the second titanium plate 5, water-absorbing sponge 6, in which:
Soil 9 is housed in the environmental cabinet 15, is provided with concrete sample 7 on soil 9,7 lower part of concrete sample is stretched
Enter in the soil 9, and it is 10mm~20mm that the surface of soil 9, which is higher than the absolute altitude of 7 bottom surface of concrete sample,；In concrete sample
It is embedding in 7 to have reinforcing bar 8, embedding first titanium plate 12 in the soil 9 of 7 lower section of concrete sample, the top surface of concrete sample 7
Water-absorbing sponge 6 described in upper setting, water-absorbing sponge 6 are in water-saturated state and 7 top surface of concrete sample are completely covered, and described
Two titanium plates 5 are placed on 6 top of water-absorbing sponge；Water-absorbing sponge 6 between concrete sample 7, the second titanium plate 5 with a thickness of 10mm
~20mm.The temperature and humidity control instrument 14 is connect with environmental cabinet 15, for controlling the temperature and humidity of soil 9 in environmental cabinet 15, temperature
The probe of humidity controller 14 is set in the soil 9；
Anode, the cathode of the adjustable pressure stabilizing AC power source are separately connected the both ends of second titanium plate 5, and adjustable
The cathode 3 of formula pressure stabilizing AC power source is also connect with reinforcing bar 8 and the first titanium plate 12 respectively；The punched-type alternating current pick-up
Device 10 is connect with current curve recorder 13, and the conducting wire for connecting the cathode 3 of adjustable pressure stabilizing AC power source with reinforcing bar 8 passes through
Punched-type AC current transducer 10；The first resistor case 4 is connected on the anode of adjustable pressure stabilizing AC power source, the second titanium
Between plate 5, the second resistance case 11 is connected between the cathode 3 of adjustable pressure stabilizing AC power source, the second titanium plate 5.We
In case, the intensity size of stray electrical current in external monitor test specimen can be thought in environment using transmitter 10 and recorder 13, conveniently make it
Reach experimental design value, and verifies the form of stray electrical current in test specimen and be consistent with actually detected curve out.Wherein, first resistor
The effect of case 4, second resistance case 11 is that accurate adjust reaches design value by the current strength of stray electrical current, can be in recorder 13
The current strength size for the stray electrical current that upper discovery goes out from loss in special circuit fluctuates back and forth near design value.
In the embodiment of the present invention, adjustable pressure stabilizing AC power source uses AC-305D type power supply, maximum output AC
30V/5A,150W,50Hz；First resistor case, second resistance case use ZX 38A/10 type alternating current-direct current resistance box, punched-type exchange
Current transducer uses the transmitter of MIK-DJI-0-5A-1200A model, and current curve recorder is more using ECR7100 model
Channel recording instrument without paper, temperature and humidity control instrument use the temperature and humidity controller of TDK-0302 model, wherein Temperature and Humidity Control range,
I.e. the humiture setting value is temperature: -25 DEG C~70 DEG C, humidity: 45~85%RH；The inside dimension of environmental cabinet is
560mm*360mm*330mm。
The present invention further discloses a kind of test method that simulation metro stray current influences concrete durability, packets
Include following steps:
Step 1, concrete sample is prepared, reinforcing bar is embedded in concrete sample in the preparation；
Specifically, in the present embodiment, specimen Design is cube body concrete of the 150mm × 150mm × 150mm with reinforcing bar
Sample, then casting concrete sample so that parallel reinforced steel bar is in concrete sample bottom surface, and with apart from concrete sample bottom surface
45mm, bar diameter 20mm, length 20cm, in concrete sample, there are the exposed area of 10cm length on reinforcing bar,
Rest part heat-shrink tube encapsulation process, reinforcing bar one end pre-terminated stretch out concrete sample conducting wire, in order to adjustable pressure stabilizing
AC power source connection, then two ends of reinforcing bar are sealed using epoxy resin；
After the completion of concrete sample pours, it is put into standard curing room and conserves 28 days, then natural curing was to 90 days, to intensity
It is taken out after stabilization, smears epoxy resin respectively on four sides of concrete sample, for use.
Step 2, the case lid for opening environmental cabinet fills soil into environmental cabinet, and the first titanium plate is placed in soil, then
Concrete sample is placed on soil, soil is continued to fill up, the surface of soil is made to be higher than the absolute altitude of concrete sample bottom surface
The spacing of 10mm~20mm, the first titanium plate and concrete sample bottom surface is 10mm~20mm；
Step 3, the water-absorbing sponge in water-saturated state is placed in concrete sample top, water-absorbing sponge is completely covered
Then second titanium plate is placed on water-absorbing sponge by concrete sample top surface again；
Step 4, by the string holes on environmental cabinet side wall, anode, the cathode of adjustable pressure stabilizing AC power source are made using conducting wire
The both ends of second titanium plate are separately connected, the cathode of adjustable pressure stabilizing AC power source is also respectively connected with reinforcing bar and the first titanium
Plate；Connect punched-type AC current transducer with current curve recorder, and make the cathode of adjustable pressure stabilizing AC power source with
The conducting wire of reinforcing bar connection passes through punched-type AC current transducer；The first resistor case is connected on adjustable pressure stabilizing alternating current
Between the anode in source, the second titanium plate, the second resistance case is connected on the cathode of adjustable pressure stabilizing AC power source, the second titanium plate
Between；Temperature and humidity control instrument is connect with environmental cabinet, is set to the probe of temperature and humidity control instrument in the soil；
Closure case lid is simultaneously sealed, while to being sealed at string holes；
Step 5, the humiture setting value that the temperature and humidity in environmental cabinet reaches test requirements document is adjusted using temperature and humidity control instrument,
Start adjustable pressure stabilizing AC power source, then observation is tried after dissipating out in titanium plate by concrete in current curve recorder
The current strength change curve of the stray electrical current of reinforcing bar in sample, at the same adjust first resistor case, second resistance case make to exchange it is spuious
When the wave crest of the change curve of electric current is near current setting value, it is found that crest height is not constant, but attached in setting value
Recent echo is dynamic, meets the version that stray electrical current generates in practice, stops adjusting at this time, keeps the state until reaching examination
The stipulated time is tested, pressure stabilizing AC power source is then turned off, takes out concrete sample, that is, conventional method can be used to analyze miscellaneous by subway
Dissipate the correlative study result of the sample of electrolytic corrosion.
In the present invention, the producing method and transmission path of stray electrical current, and more accorded with by environment locating for corrosion spool
Actual conditions are closed, are described as follows:
Fig. 1 according to the present invention, in experimental rig of the invention, proprietary current loop are as follows: circuit 1.: 2-4-5-11-3
(label in digital representation Fig. 1), the circuit that the strays stream dissipated out passes through be circuit 2.: 2-4-5-6-7-8-3 and circuit
3.: two loss circuits of 2-4-5-6-7-8-9-12-3.
1. number loop circuit representation is that electric current returns to rail and flow to power transformation from contact net by vehicle in traction generator
Circuit, 2. number loop circuit representation be from loss on the rail in 1. number circuit come out stray electrical current flow through concrete after
It is pooled in structure reinforcing bars then to flow out from reinforcing bar and returns to the circuit that rail flows to substation by concrete, 3. circuit diameter
What is indicated is other than being pooled on reinforcing bar after flowing through concrete from the stray electrical current of loss on the rail in 1. number circuit out
Part, be then return to the stray electrical current part of electric substation using the soil entered in environment after reinforcing bar lower concrete, with
The underground railway track traffic stray electrical current transmission path of Fig. 2 is identical, meets the transmission path of metro stray current.In the present embodiment from
The current curve feature observed in multi channel currents chart recording instrument meets the variation characteristic of practical stray electrical current, is setting
Definite value nearby fluctuates back and forth, tests sub-project to Shanghai Underground stray electrical current with Shanghai Shentong Metro Group Co., Ltd. in 2017
The reinforcing bar polarization potential change curve measured in report is consistent with the variation diagram of subway Train Schedule.
The stray electrical current intensity size that the present embodiment uses is regulation in " metro stray current corrosion guard technology regulation "
Galvano-cautery risk direct quantitative index limit 0.6mA/dm2, it is design value 30mA/ that when test, which takes 50 multiple values of limit value,
dm2, therefore the surface area 0.03dm of the exposure according to reinforcing bar in concrete2The stray electrical current intensity value 1mA that can be designed.
The present embodiment is that moisture content and NaCl are constant in soil environment locating for holding test specimen during the test, is carried out to it
Encapsulation process, and controlled using temperature and humidity controller.After concrete sample reaches predetermined etch state, power supply is closed,
Environmental cabinet is opened, concrete sample is taken out, whether linear polarization method test reinforcing bar, which reaches corrosion shape, is carried out to concrete sample
State, the test specimen for reaching etch state carry out damaged sampling, the concrete sample above and below reinforcing bar are taken to utilize titration
Chlorine ion concentration is measured, damaged section is distributed using rainbow reagent measurement hydroxide ion concentration, finds ion distribution and reality
Border situation is consistent, and it was found that the corrosion character of reinforcing bar is locally to dissolve, with stray current corrosion reinforcing bar in actual conditions
The corrosion condition of concrete structure is identical, and test effect is good, the steel area that measures loss rate also be actually consistent, the mould
The apparatus and method of quasi- metro stray current effect armored concrete are proved to be to work well.Present invention test laid out above
Device, which is manufactured experimently, on probation to be proved to work well, using safe, low in cost, structure is simple, easy to maintain and can reach completely
To experimental design requirement.
Claims (8)
1. a kind of experimental rig that simulation metro stray current influences concrete durability, which is characterized in that including environmental cabinet
(15), be provided with outside environmental cabinet (15) adjustable pressure stabilizing AC power source (1), first resistor case (4), second resistance case (11),
Punched-type AC current transducer (10), current curve recorder (13) and temperature and humidity control instrument (14), environmental cabinet (15) are interior
Portion is provided with the first titanium plate (12), the second titanium plate (5), water-absorbing sponge (6), in which:
Soil (9) are housed in the environmental cabinet (15), concrete sample (7) are provided on soil (9), in concrete sample
(7) embedding in have reinforcing bar (8), embedding first titanium plate (12), concrete in the soil (9) below concrete sample (7)
The water-absorbing sponge (6) is set on the top surface of sample (7), and water-absorbing sponge (6) is in water-saturated state and concrete is completely covered
Sample (7) top surface；Second titanium plate (5) is placed on water-absorbing sponge (6) top；The temperature and humidity control instrument (14) and ring
Border case (15) connection, the probe of temperature and humidity control instrument (14) are set in the soil (9)；
Anode (2), the cathode (3) of the adjustable pressure stabilizing AC power source are electrically connected the both ends of second titanium plate (5),
And the cathode (3) of adjustable pressure stabilizing AC power source is also connect with reinforcing bar (8) and the first titanium plate (12) respectively；The punched-type
AC current transducer (10) is connect with current curve recorder (13), and make the cathode (3) of adjustable pressure stabilizing AC power source with
The conducting wire of reinforcing bar (8) connection passes through punched-type AC current transducer (10)；The first resistor case (4) is connected on adjustable
Between the anode (2) of pressure stabilizing AC power source, the second titanium plate (5), the second resistance case (11) is connected on adjustable pressure stabilizing and hands over
Between the cathode (3) in galvanic electricity source, the second titanium plate (5).
2. the experimental rig that simulation metro stray current influences concrete durability, feature exist as described in claim 1
In the concrete sample (7) lower part is protruded into the soil (9), and the surface of soil (9) is higher than concrete sample (7)
The absolute altitude of bottom surface is 10mm~20mm.
3. the experimental rig that simulation metro stray current influences concrete durability, feature exist as described in claim 1
In the spacing of first titanium plate (12) and concrete sample (7) bottom surface is 10mm~20mm, the water-absorbing sponge (6)
With a thickness of 10mm~20mm.
4. the experimental rig that simulation metro stray current influences concrete durability, feature exist as described in claim 1
In the environmental cabinet (15) is the hollow rectangular box with case lid.
5. a kind of test method that simulation metro stray current influences concrete durability, which is characterized in that including following step
It is rapid:
Step 1, concrete sample is prepared, reinforcing bar is embedded in concrete sample in the preparation；
Step 2, the case lid for opening environmental cabinet fills soil into environmental cabinet, and the first titanium plate is placed in soil, then will mix
Solidifying soil sample is placed on soil, continues to fill up soil, and the surface of soil is made to be higher than the absolute altitude 10mm of concrete sample bottom surface
The spacing of~20mm, the first titanium plate and concrete sample bottom surface is 10mm~20mm；
Step 3, the water-absorbing sponge in water-saturated state is placed in concrete sample top, makes water-absorbing sponge that coagulation be completely covered
Then second titanium plate is placed on water-absorbing sponge by soil sample top surface again；
Step 4, by the string holes on environmental cabinet side wall, distinguish the anode of adjustable pressure stabilizing AC power source, cathode using conducting wire
The both ends of second titanium plate are connected, the cathode of adjustable pressure stabilizing AC power source is also respectively connected with reinforcing bar and the first titanium plate；Make
Punched-type AC current transducer is connect with current curve recorder, and connects the cathode of adjustable pressure stabilizing AC power source and reinforcing bar
The conducting wire connect passes through punched-type AC current transducer；The first resistor case is being connected on adjustable pressure stabilizing AC power source just
Between pole, the second titanium plate, the second resistance case is connected between the cathode of adjustable pressure stabilizing AC power source, the second titanium plate；
Temperature and humidity control instrument is connect with environmental cabinet, is set to the probe of temperature and humidity control instrument in the soil；
Closure case lid is simultaneously sealed, while to being sealed at string holes；
Step 5, the temperature and humidity in environmental cabinet is adjusted using temperature and humidity control instrument and reach humiture setting value, start adjustable pressure stabilizing
Then AC power source observes the current strength change curve of stray electrical current in current curve recorder, while adjusting the first electricity
Resistance case, second resistance case make the wave crest of the change curve of alternative stray current near current setting value when, stop adjusting, keep
The state is then turned off pressure stabilizing AC power source, takes out concrete sample up to reaching the test determination time.
6. the test method that simulation metro stray current influences concrete durability, feature exist as claimed in claim 5
In described prepares concrete sample, and reinforcing bar is embedded in concrete sample in the preparation, comprising:
Specimen Design is cube concrete sample of the 150mm × 150mm × 150mm with reinforcing bar, and then casting concrete tries
Sample, so that parallel reinforced steel bar is grown in concrete sample bottom surface, and with apart from concrete sample bottom surface 45mm, bar diameter 20mm
Degree is 20cm, in concrete sample, there are the exposed area of 10cm length on reinforcing bar, at the rest part pyrocondensation seal of tube
Reason, reinforcing bar one end pre-terminated stretches out the conducting wire of concrete sample, then two ends of reinforcing bar are sealed using epoxy resin；
After the completion of concrete sample pours, it is put into standard curing room and conserves 28 days, then natural curing was to 90 days, to intensity stabilization
After take out, smear epoxy resin respectively on four sides of concrete sample, for use.
7. the test method that simulation metro stray current influences concrete durability, feature exist as claimed in claim 5
In the current setting value is 30mA/dm2。
8. the test method that simulation metro stray current influences concrete durability, feature exist as claimed in claim 5
In the humiture setting value are as follows: temperature: -25 DEG C~70 DEG C, humidity: 45~85%RH.
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| CN109655398A (en) * | 2019-02-27 | 2019-04-19 | 长安大学 | A kind of device and measurement method for the corrosion of testing conductive concrete steel bridge panel |
| CN109655398B (en) * | 2019-02-27 | 2023-11-10 | 长安大学 | Device for testing corrosion of conductive concrete steel bridge deck and measuring method |
| CN114624532A (en) * | 2022-03-14 | 2022-06-14 | 华东交通大学 | Stray current corrosion resistant power grid detection device |
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