CN114264589B - Concrete chloride ion permeability resistance detection device and method for field environment - Google Patents
Concrete chloride ion permeability resistance detection device and method for field environment Download PDFInfo
- Publication number
- CN114264589B CN114264589B CN202111645626.4A CN202111645626A CN114264589B CN 114264589 B CN114264589 B CN 114264589B CN 202111645626 A CN202111645626 A CN 202111645626A CN 114264589 B CN114264589 B CN 114264589B
- Authority
- CN
- China
- Prior art keywords
- anode
- cathode
- test
- concrete
- electrode
- 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.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention relates to a concrete chloride ion permeability resistance detection device and method for a site environment, wherein the device comprises an anode test tank and a cathode test tank, both ends of the anode test tank and both ends of the cathode test tank are respectively provided with a sealing device, the anode test tank and the cathode test tank are connected through a pressure loading device, an anode electrode connected with power supply equipment is arranged in the anode test tank, a cathode electrode connected with the power supply equipment is arranged in the cathode test tank, the anode test tank is also provided with a chloride ion selective electrode and a reference electrode, and the reference electrode can generate potential difference with the chloride ion selective electrode under the condition that chloride ions enter the anode test tank.
Description
Technical Field
The invention relates to the technical field of engineering test equipment, in particular to a device and a method for detecting the permeability of concrete for site environment.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The reinforced concrete member is affected by load, external environment and other factors in the service period of the structure, so that the reinforced concrete member can be degraded to different degrees. Among them, in coastal areas and areas with a large amount of salt lakes, problems such as cracking of concrete due to penetration of chloride ions into the interior of the concrete are very remarkable. Therefore, the method is significant in detecting the impermeability of chloride ions in the concrete.
At present, the impermeability of a concrete structure is mainly measured by an electric flux test, and a test is carried out aiming at an indoor test piece with a specific size, but the chloride ion permeation resistance of the concrete with a set depth cannot be measured according to the requirement. The indoor test device cannot be applied to on-site impermeability detection, and water saturation needs to be carried out on a test piece before an electric flux test is carried out, so that water saturation work is difficult to be unfolded on site; meanwhile, the result of the electric flux test is the electric quantity of all ions in the cathode solution passing through the test piece after being electrified and accelerated, and the measured result is not just chloride ions, but cannot accurately and quantitatively indicate the capability of the concrete in resisting the penetration of the chloride ions. Therefore, it is highly desirable to invent a concrete impermeability detection device which is used on site, has a micro-damage to a concrete structure, and can accurately measure the chloride ion permeation resistance of the concrete.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a device for detecting the permeability of concrete against chloride ions, which is used in site environment, and can accurately measure the permeability of concrete against chloride ions.
In order to achieve the above purpose, the invention adopts the following technical scheme
In a first aspect, an embodiment of the present invention provides a device for detecting permeability of concrete to chloride ions for an on-site environment, including an anode test tank and a cathode test tank, both ends of the anode test tank and the cathode test tank are respectively provided with a sealing device, the anode test tank and the cathode test tank are connected by a pressure loading device, an anode electrode connected with a power supply device is provided in the anode test tank, a cathode electrode connected with the power supply device is provided in the cathode test tank, the anode test tank is further provided with a chloride ion selective electrode and a reference electrode, and the reference electrode is capable of generating a potential difference with the chloride ion selective electrode under the condition that chloride ions enter the anode test tank.
Optionally, the pressure loading device comprises a connecting mechanism, one end of the connecting mechanism is connected with the anode test groove, the other end of the connecting mechanism is connected with the cathode test groove, an air bag is arranged on the periphery of the connecting mechanism, and the air bag is connected with the air charging device.
Optionally, the connecting mechanism adopts telescopic machanism, including the fixed part of being connected with the cathode test groove and the telescopic portion of being connected with the anode test groove, fixed part and telescopic portion telescopic connection.
Optionally, the anode test groove is provided with an anode conducting strip, one end of the anode conducting strip is connected with an anode electrode, the other end of the anode conducting strip is connected with power supply equipment through a wire, and correspondingly, the cathode test groove is internally provided with a cathode conducting strip, one end of the cathode conducting strip is connected with the cathode electrode, and the other end of the cathode conducting strip is connected with the power supply equipment.
Optionally, the anode test tank and the cathode test tank are both in annular cylinder structures, the outer cylinder walls of the anode test tank and the cathode test tank are provided with liquid outlet holes, correspondingly, the anode electrode and the cathode electrode are annular electrodes,
optionally, the anode test tank is provided with an anode solution injection pipe communicated with the internal space of the anode test tank, and the cathode test tank is provided with a cathode solution injection pipe communicated with the internal space of the cathode test tank.
Optionally, the anode test tank is further provided with a water injection pipe for injecting water into the space between the anode test tank and the cathode test tank.
Optionally, the reference electrode is a saturated calomel electrode.
Optionally, the sealing device includes the sealing washer, and the sealing washer is inside to be provided with the resistance wire, and the sealing washer still is provided with the gas that can thermal expansion.
In a second aspect, embodiments of the present invention provide a method of operating a device and method for detecting the permeability of concrete to chloride ions for use in an in situ environment, comprising the steps of:
drilling holes on the surface of the concrete to be tested;
placing the anode test groove and the cathode test groove which are connected by using the pressure loading device into the drilled hole, attaching the sealing device to the wall of the drilled hole, and sealing by using the sealing device;
distilled water is injected into a sealed space between the anode test groove and the cathode test groove, and pressure loading device is utilized to apply pressure to the injected distilled water towards the wall of the drilling hole, so that the distilled water stretches into the concrete to saturate the concrete;
injecting a cathode solution into the cathode test tank, injecting an anode solution into the anode test tank, connecting an anode electrode and a cathode electrode with power supply equipment, outputting a set voltage by the power supply equipment, and starting timing;
when a potential difference is generated between the chloride ion selective electrode and the reference electrode, stopping timing, and obtaining the time of the chloride ions penetrating through the concrete in unit depth.
The invention has the beneficial effects that:
1. the device can be placed in a drilling hole arranged on the surface of a concrete structure, the cathode solution permeates into the concrete and permeates into the anode solution through the sealing device, the time for permeation of chloride ions in unit depth through the concrete can be obtained through the time for generating potential difference between the chloride ion selective electrode and the reference electrode, the whole test can be carried out on a construction site, and the impermeability detection is convenient to carry out on the site.
2. According to the device provided by the invention, through the arrangement of the air bag and the water injection pipe, air is injected into the air bag to expand the air bag, and a certain pressure is applied to distilled water in the middle area of the two test tanks by adopting the method, so that the distilled water can quickly infiltrate into the concrete, and the water saturation effect on the concrete is achieved.
3. According to the device disclosed by the invention, the anode test tank is provided with the chloride ion selective electrode, and the chloride ion selective electrode senses that chloride ions permeate into the anode solution from the cathode solution through concrete, so that a potential difference is generated to form a loop with the reference electrode. The chloride ion selective electrode can only sense chloride ions in the solution, can not sense other ions, eliminates the interference of other ions in the solution on test results, and can more accurately and efficiently test the capability of resisting the penetration of the chloride ions of the concrete.
4. According to the device, the impermeability of concrete with different depths can be measured according to the needs through the arrangement of the telescopic mechanism, so that the universality of the device is improved.
5. According to the device, the sealing device adopts the sealing ring provided with the resistance wire, and the heating expandable gas is arranged in the sealing ring, so that the whole device is firmly and tightly arranged in the pre-drilled hole, and meanwhile, the water saturation area between the two test grooves can be ensured to have better air tightness.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not limit the application.
FIG. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;
FIG. 2 is a schematic view showing the state of the anode test cell and the cathode test cell in the drilled holes according to example 1 of the present invention;
FIG. 3 is a front view of an anode test cell according to example 1 of the present invention;
FIG. 4 is a top view of an anode test cell according to example 1 of the present invention;
FIG. 5 is a schematic diagram of a chloride selective electrode according to example 1 of the present invention;
FIG. 6 is a schematic view of a sealing device according to embodiment 1 of the present invention;
FIG. 7 is a schematic view of a telescopic mechanism according to embodiment 1 of the present invention;
FIG. 8 is a front view showing the structure of a chassis according to embodiment 1 of the present invention;
FIG. 9 is a top view of the chassis structure of embodiment 1 of the present invention;
FIG. 10 is a front view of the chassis of embodiment 1 of the present invention extended to the longest state;
FIG. 11 is a schematic view showing the structure of an inflator according to embodiment 1 of the present invention;
FIG. 12 is a schematic view showing the structure of a deceleration pipeline according to embodiment 1 of the present invention;
the device comprises an anode test tank 1, a cathode test tank 2, an inner cylinder wall 3, an outer cylinder wall 4, a liquid outlet hole 5, an anode electrode 6, a cathode electrode 7, an anode conducting sheet 8, a test host 9, a cathode conducting sheet 10, an anode solution injection pipe 11, a cathode solution injection pipe 12, a chlorine ion selective electrode 13, a reference electrode 14-1, an electrode diaphragm 14-2, an electrode pipe 14-3, an electrode cap 14-4, an electrode lead 15, a sealing device 16, a resistance wire 17, a heating controller 18, an air bag 19, an air injection hole 20, an air charging device 21, an outer casing 22, a lifting rod 23, a bearing 24, a motor 25, a wireless signal receiver 26, an inner cylinder 27, an intermediate cylinder 28, an outer cylinder 29, a water injection pipe 30, an impeller 31, an air inlet 32, a speed reducing pipeline 33 and an air outlet.
Detailed Description
Example 1
The embodiment provides a concrete anti-chloride ion permeability detection device for a site environment, as shown in fig. 1-4, the device comprises an anode test tank 1, a cathode test tank 2 and a pressure loading device which is arranged between the anode test tank 1 and the cathode test tank 2 and connects the anode test tank 1 and the cathode test tank 2, and a chloride ion migration device formed by the anode test tank 1 and the cathode test tank 2 can be placed into a drilling hole formed in the surface of a concrete structure to be detected.
The anode test tank 1 and the cathode test tank 2 are of annular cylinder structures, and comprise an inner cylinder wall 3 and an outer cylinder wall 4 which are coaxially arranged, a top plate is arranged between the top ends of the inner cylinder wall 3 and the outer cylinder wall 4, and a bottom plate is arranged between the bottom ends. The inside of the cylinder structure is provided with an annular cavity, the cavity of the anode test groove 1 is used for containing anode solution, and the cavity of the cathode test groove 2 is used for containing cathode solution.
The outer cylinder wall of the anode test tank 1 is provided with a plurality of liquid outlet holes 5 for the anode solution to permeate into the concrete structure, and the outer cylinder wall of the cathode test tank 2 is provided with a plurality of liquid outlet holes for the cathode solution to permeate into the concrete structure.
An annular anode electrode 6 is provided in the annular cavity of the anode test cell 1, and an annular cathode electrode 7 is provided in the annular cavity of the cathode test cell 2.
The anode electrode 6 is fixed with one end of an anode conducting plate 8, and the other end of the anode conducting plate 8 passes through the top plate of the anode test groove and then is connected with the anode of power supply equipment through a wire, and the power supply equipment in the embodiment is a test host 9.
The cathode electrode 7 is fixed with one end of the cathode conducting strip 10, and the other end of the cathode conducting strip 10 passes through the pressure loading device and passes through the anode test groove through the cathode conducting strip reserved hole on the anode test groove and then is connected with the cathode of the power supply equipment through a lead.
In this embodiment, a portion of the outer surface of the cathode conductive sheet 10 passing through the pressure loading device and the anode test cell is coated with an insulating layer.
The test mainframe 9 can output a set voltage to the anode electrode 6 and the cathode electrode 7.
The top plate of the anode test tank 1 is provided with an anode solution injection pipe 11 for injecting an anode solution into the anode test tank, the anode solution of this embodiment is a NaOH solution of 0.3mol/L, the top plate of the cathode test tank is provided with a cathode solution injection pipe 12, the cathode solution injection pipe 12 passes through the pressure loading device and passes through the anode test tank 1 through a cathode solution injection hole reserved in the anode test tank 1, the cathode solution injection pipe is used for adding a cathode solution into the cathode test tank, and the cathode solution of this embodiment is a NaCl solution of 3%.
The top plate of the anode test tank is also fixedly provided with a chloride ion selective electrode 13 and a reference electrode 14, and the chloride ion selective electrode 13 and the reference electrode 14 extend into the internal space of the anode test tank.
As shown in FIG. 5, the chloride selective electrode is a mixture of AgCl and Ag 2 The sediment mixture of S is pressed into an electrode diaphragm 14-1, the electrode diaphragm 14-1 is fixed at the bottom end of an electrode tube 14-2, the electrode tube 14-2 is a plastic tube, the electrode tube 14-2 is fixed on the top plate of an anode test groove, the top end of the electrode tube 14-2 is sleeved with an electrode cap 14-3, one end of an electrode wire 14-4 passes through the electrode cap 14-3 to be connected with the electrode diaphragm 14-1 at the bottom of the electrode tube, and the other end of the electrode wire 14-4 is connected with a chloride ion selective electrode interface of a test host 9.
And a millivoltmeter positioned inside the test host is connected between the chloride ion selective electrode interface and the reference electrode interface.
The chloride ion selective electrode 13 and the reference electrode 14 are fixed in a chloride ion selective electrode preformed hole and a reference electrode preformed hole on the top plate of the anode test tank, and the chloride ion selective electrode 13 and the reference electrode 14 penetrate into the inside of the anode test tank through the preformed hole to be in contact with anode solution.
When chloride ions in the cathode solution are accelerated to migrate, and permeate into the anode solution through the concrete to be tested with a set depth, the potential of the selective electrode of the chloride ions is changed, a potential difference is generated, the selective electrode and the reference electrode form a loop, at the moment, a millivolt meter senses the potential difference, an electric signal is sent to a timing module in the test host 9 through an internal lead of the test host, the timing module stops timing, and the timing time is displayed on a display screen of the test host 9.
The upper and lower both ends of positive pole test tank 1 and cathode test tank 2 all are provided with sealing device 15, and sealing device 15 can laminate with the pore wall of drilling on the concrete structure for between two sealing device of positive pole test tank 1, form sealed space between two sealing device of cathode test tank 2 and between positive pole test tank 1 and the cathode test tank 2.
As shown in fig. 6, the sealing device 15 includes a sealing ring made of flexible material, a resistance wire 16 is disposed in the sealing ring, the resistance wire 16 is connected with a heating controller 17, the heating controller 17 is connected with the testing host 9 through a wireless signal transmitter in the testing host 9, and can receive the instruction work of the testing host 9, and the sealing ring is also filled with gas capable of being expanded by heating, and the gas in this embodiment is carbon dioxide.
After the device starts to work, the resistance wire 16 is heated by the heating controller 17, so that the volume of carbon dioxide gas is increased, the volume of the sealing ring is increased, the whole sealing device is firmly and tightly arranged in a pre-drilled hole, and meanwhile, the sealing space formed between the cathode test groove 2 and the anode test groove 1 can be ensured to have better air tightness. The wireless signal emitter is arranged in the test host 9, and the heating controller 17 in the sealing ring can be controlled by the wireless signal emitter in the test host to heat the resistance wire 16, so that CO 2 The gas volume increases, and then makes the sealing washer inflation for whole device firmly closely settles in the hole of boring in advance, can guarantee simultaneously that cathode test groove 2 and anode test groove 1 intermediate full water region have better gas tightness. When the resistance wire 16 is heated to 130 ℃, the temperature starts to be maintained, the temperature does not rise any more, and the volume of the sealing ring is not increased. After the test is completed, the heating controller 17 is turned off, the temperature of the resistance wire 16 is reduced, and CO 2 The volume of the gas is also reduced, so that the volume of the sealing ring is reduced, and the whole device can be taken out from the hole after the volume is reduced to a certain degree.
A pressure loading device is arranged between the anode test tank 1 and the cathode test tank 2, and the anode test tank and the cathode test tank are connected through the pressure loading device.
The pressure loading device comprises a connecting mechanism and an air bag 18 arranged on the periphery of the connecting mechanism, the air bag 18 is arranged between the anode test groove 1 and the cathode test groove 2, the top end of the air bag 18 is connected with an air charging pipe, and the air charging pipe passes through an air injection hole 19 reserved in the anode test groove and then is connected with an air charging device 20.
The telescopic mechanism is adopted by the connecting mechanism in the embodiment, so that the distance between the anode test groove 1 and the cathode test groove 2 can be adjusted, the impermeability of concrete with different depths can be measured according to the requirements, and the universality of the device is improved.
The telescopic mechanism comprises a fixed part and a telescopic part, the fixed part is connected with the cathode test groove 2, and the telescopic part is connected with the anode test groove 1.
In one embodiment, the telescoping mechanism may employ an electric telescoping rod or cylinder.
In another embodiment, as shown in fig. 7, the telescoping mechanism includes an outer housing 21, a chassis, and a lifter 22.
The outer shell 21 and the lifting rod 22 are both provided with threads, the lifting rod 22 is in threaded connection with the outer shell 21, the lifting rod 22 rotates and can move along the axis direction of the outer shell 21, the top of the lifting rod 22 is rotationally connected with the bottom center position of the anode test groove 1 through a bearing 23, the lifting rod 22 is fixed with the inner ring of the bearing 23, the outer ring of the bearing 23 is fixed with the anode test groove 1, and the anode test groove 1 is not driven to rotate when the lifting rod 22 rotates.
The bottom of lifter 22 is fixed connection with the output shaft of the motor 24 that sets up on the chassis, and motor 24 is connected with test host computer 9 through the wireless signal receiver 25 that sets up on the chassis, can receive test host computer 9's instruction work.
The chassis is also provided with a battery pack for supplying power to the wireless signal receiver and the motor.
As shown in fig. 8 to 10, the chassis comprises an inner cylinder 26, a middle cylinder 27 and an outer cylinder 28 which are connected in a telescopic manner, the outer cylinder 28 is sleeved on the periphery of the middle cylinder 27 and is connected with the middle cylinder 27 in a telescopic manner, and the middle cylinder 27 is sleeved on the periphery of the inner cylinder 26 and is connected with the inner cylinder 26 in a telescopic manner. The motor 24, the battery pack and the wireless signal receiver are all arranged at the top of the inner cylinder 26, and the bottom surface of the outer cylinder 28 is fixedly connected with the top of the cathode test groove 2.
In this embodiment, in order to prevent the chassis from rotating, the inner cylinder 26 and the middle cylinder 27 are rectangular cylinders, and cannot rotate around their own axes, the top of the outer cylinder 28 is fixedly connected with the bottom of the outer housing 21, and in order to facilitate the connection between the outer cylinder 28 and the outer housing 21, the outer cylinder 28 is a cylindrical cylinder.
A limiting table is arranged between the inner cylinder 26 and the middle cylinder 27 to prevent the inner cylinder 26 from being separated from the middle cylinder 27, and a limiting table is also arranged between the middle cylinder 27 and the outer cylinder 28 to prevent the middle cylinder 27 from being separated from the outer cylinder 28.
The bottom of the lifting rod 22 is fixed by an output shaft of a motor 24 capable of rotating bidirectionally, a battery pack and a wireless signal receiver 25 are arranged at the bottom of the motor 24 and are embedded in an inner cylinder 26 of the lifting chassis. The wireless signal receiver 25 can receive the wireless signal sent by the test host 9, so as to control the output shaft of the motor 24 to rotate, and further drive the lifting rod 22 to rotate upwards in the outer shell 21, so that the lifting rod 22 ascends, and the motor 24 ascends simultaneously while the lifting rod 22 ascends, and drives the chassis to generate an extending motion, thereby achieving the effect of extending the lifting rod 22. In contrast, the test host 9 sends a wireless signal opposite to the rotation direction at this time, and the wireless signal receiver 25 controls the output shaft of the motor 24 to rotate in the opposite direction after receiving, so as to drive the lifting rod 22 to rotate downwards along the outer shell 21, thereby lowering the lifting rod 22, and when the lifting rod 22 descends, the motor 24 descends simultaneously, and drives the chassis to generate shrinkage motion, so that the effect of shortening the lifting rod is achieved.
The airbag 18 is connected to an inflator 20 through an intake pipe. The water injection pipe 29 is installed in the anode test tank 1 through the water injection hole, the water injection pipe 29 is communicated with the space between the anode test tank 1 and the cathode test tank 2, distilled water is injected into the middle of the cathode test tank and the anode test tank through the water injection pipe 29, and then a certain volume of air is injected into the air bag 18 through the air charging pipe connected with the upper part of the air bag 18, so that the air bag is inflated, distilled water in a water saturation area in the middle of the two test tanks is pressurized at a certain pressure, and the distilled water can be accelerated to permeate into the concrete, so that the water saturation effect on the concrete is achieved. Wherein, before inflating the gasbag is about 3mm from the concrete hole lateral wall, after inflating the gasbag, is about 0.5mm from the concrete lateral wall.
As shown in fig. 11-12, the air charging device comprises an air charging shell, an impeller 30 capable of rotating is arranged at the bottom of the shell, an air inlet 31 is arranged at the bottom of the shell, a speed reducing pipeline 32 is arranged at the top of the shell, the pipeline pipe diameter of the air inlet end is smaller than that of the air outlet end, the air charging device plays a role in reducing air, an air outlet 33 is arranged at the top of the air charging shell, the air outlet 33 is connected with the air bag 18 through an air charging pipeline, an air charging hole is arranged in an anode test groove, and the air charging pipeline passes through the anode test groove through the air charging hole and is connected with the air bag
When the inflator 20 is powered on, the impeller 30 starts to rotate, and gas is sucked from the gas inlet 31, fed into the gas deceleration pipeline 32, and then enters the airbag 18 through the gas outlet 33 and the inflation tube. The deceleration pipeline 32 can ensure that the gas is uniformly and stably input into the air bag.
The test host is divided into three modules, namely a chloride ion migration accelerating module, a timing module and a chloride ion detecting module, wherein the three modules are connected through internal wires of the test host 9, the chloride ion migration accelerating module is used as power supply equipment and can apply 60V direct-current voltage to an anode electrode and a cathode electrode so as to accelerate chloride ion migration, and an electric signal is sent to the timing module through the internal wires of the host 20 while the voltage is applied, so that the timing module starts timing. The chloride ion detection module includes a chloride ion selective electrode 13, a reference electrode 14, and a millivoltmeter.
The device of this embodiment needs to drill holes in advance on the surface of the concrete to be measured, and the depth of the holes can be adjusted according to the depth of the concrete to be measured.
In the apparatus of this example, the solution injected into the cathode test cell was a NaCl solution having a mass concentration of 3%. The solution injected into the anode test tank was NaOH solution having a molar concentration of 0.3 mol/L.
In the device of the embodiment, the chloride ion selective electrode is soaked and activated in 10 < -3 > mol/L NaCl solution for 1h before use, and is repeatedly cleaned by deionized water.
Example 2
The embodiment provides a working method of the concrete impermeability detection device for a construction site, which comprises the following steps:
(1) Firstly, drilling holes on the surface of the concrete to be measured in advance, wherein the depth of the drilling holes can be adjusted according to the actual depth of the concrete to be measured. The diameters of the drilled holes are slightly larger than those of the anode test tank 1 and the cathode test tank 2. Before using, the chloride ion selective electrode 13 should be soaked in 10-3mol/L NaCl solution for 1h for activation, and then repeatedly washed by deionized water. Then, the chloride selective electrode 13 was inserted into the chloride selective electrode prepared hole of the upper surface of the anode test cell 1.
(2) The telescopic mechanism is adjusted in a lifting manner by the test host 9 until the telescopic mechanism is adjusted to the required test distance. And recording the length of the telescopic mechanism at the moment as the depth of chloride ions penetrating through the concrete to be tested. The device is inserted into the hole, and the device is required to be slowly and uniformly inserted, so that the sealing ring of the impermeability detection device is prevented from being scratched by the side wall of the concrete in the process of insertion, and the air tightness of the device is influenced. Then the heating controller 17 in the sealing ring heats the resistance wire 16 through the testing host, thereby enabling CO 2 The gas volume increases, and then makes the sealing washer inflation for whole device firmly closely settles in the hole of boring in advance, can guarantee simultaneously that cathode test groove 2 and the experimental groove 2 mid portion of positive pole have better gas tightness. After the resistance wire is heated to 130 ℃, the heating controller starts to maintain the temperature, the temperature is not increased continuously, and the volume of the sealing ring is not increased.
(3) After the on-site detection concrete chloride ion impermeability device is installed, a certain amount of distilled water is injected into the sealed space in the middle of the female test groove and the male test groove through the water injection pipe, the water stop plug is plugged into the water injection pipe, and a certain volume of air is injected into the air bag 18 through the inflation device, so that the distance between the air bag 18 and the side wall of the concrete is shortened from 3mm to 0.5mm, and distilled water in the sealed space is pressurized to a certain pressure, so that the distilled water can be accelerated to permeate into the concrete, and the effect of water saturation is achieved on the concrete.
(4) After the water saturation is completed, naCl solution with the mass concentration of 3% is injected into the cathode test tank 2 through a cathode solution injection pipe. NaOH solution with the molar concentration of 0.3mol/L is injected into the anode test tank 1 through an anode solution injection pipe.
(5) The cathode and anode leads are respectively connected with the cathode and anode of the test host 9, the power supply of the test host 9 is connected, and 60V direct current voltage is applied to the two anode electrodes and the cathode electrode. At the same time, the timing module starts timing. When chloride ions in the cathode solution are accelerated to migrate, and permeate into the anode solution through the concrete to be tested with a set depth, the potential of the chloride ion selective electrode is changed to generate a potential difference, a loop is formed between the potential difference and the reference electrode, the potential difference is sensed by the millivoltmeter, an electric signal is sent to the timing module through an internal lead of the host, the timing module stops timing, and the timing time is displayed on the display screen.
(6) When chloride ions in the cathode solution are accelerated to migrate and penetrate into the anode solution through the concrete to be tested with a set depth, the chloride ion detection module in the test host senses the potential difference, an electric signal is sent to the timing module through the internal lead of the host, the timing module stops timing, and the timing time is displayed on the display screen. The time for the chloride ions to permeate the concrete in unit depth is calculated, so that the chloride ion permeation resistance of the concrete is evaluated, and the aim of detecting the chloride ion permeation resistance on site is fulfilled.
By adopting the device of the embodiment, the diameter of the drilled hole on the concrete surface is smaller, the influence on the concrete structure is relatively smaller, the repairing is easy, and the purpose of detecting the micro damage of the concrete structure is realized.
While the foregoing description of the embodiments of the present invention has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the invention, but rather, it is intended to cover all modifications or variations within the scope of the invention as defined by the claims of the present invention.
Claims (8)
1. The concrete anti-chloride ion permeability detection device for the site environment is characterized by comprising an anode test groove and a cathode test groove, wherein sealing devices are arranged at two ends of the anode test groove and the cathode test groove, the anode test groove and the cathode test groove are connected through a pressure loading device, an anode electrode connected with power supply equipment is arranged in the anode test groove, a cathode electrode connected with the power supply equipment is arranged in the cathode test groove, a chloride ion selective electrode and a reference electrode are also arranged in the anode test groove, and the reference electrode can generate a potential difference with the chloride ion selective electrode under the condition that chloride ions enter the anode test groove;
the pressure loading device comprises a connecting mechanism, one end of the connecting mechanism is connected with the anode test groove, the other end of the connecting mechanism is connected with the cathode test groove, an air bag is arranged on the periphery of the connecting mechanism, and the air bag is connected with the air charging device;
the connecting mechanism adopts a telescopic mechanism and comprises a fixed part connected with the cathode test groove and a telescopic part connected with the anode test groove, wherein the fixed part and the telescopic part are in telescopic connection.
2. The apparatus for detecting the permeability of concrete to chloride ions for an on-site environment according to claim 1, wherein the anode test tank is provided with an anode conductive sheet, one end of the anode conductive sheet is connected with an anode electrode, the other end is connected with a power supply device through a wire, and correspondingly, a cathode conductive sheet is arranged in the cathode test tank, one end of the cathode conductive sheet is connected with the cathode electrode, and the other end is connected with the power supply device.
3. The device for detecting the permeability of concrete against chloride ions for an on-site environment according to claim 1, wherein the anode test tank and the cathode test tank are both in a ring-shaped cylinder structure, the outer cylinder walls of which are provided with liquid outlet holes, and the anode electrode and the cathode electrode are ring-shaped electrodes respectively.
4. The apparatus for detecting the permeability of concrete to chlorine ions for an on-site environment according to claim 1, wherein the anode test tank is provided with an anode solution injection pipe communicating with an inner space thereof, and the cathode test tank is provided with a cathode solution injection pipe communicating with an inner space thereof.
5. The apparatus for detecting the permeability of concrete to chlorine ions for an on-site environment according to claim 1, wherein the anode test cell is further provided with a water injection pipe for injecting water into a space between the anode test cell and the cathode test cell.
6. The apparatus for detecting the permeability of concrete to chloride ions for an in-situ environment according to claim 1, wherein said reference electrode is a saturated calomel electrode.
7. The device for detecting the permeability of concrete to chloride ions for an on-site environment according to claim 1, wherein the sealing device comprises a sealing ring, a resistance wire is arranged inside the sealing ring, and the sealing ring is further provided with a gas capable of expanding when heated.
8. A method of operating a concrete anti-chloride ion permeability test apparatus for use in a field environment, based on the concrete anti-chloride ion permeability test apparatus for use in a field environment of claim 1, comprising the steps of:
drilling holes on the surface of the concrete to be tested;
placing the anode test groove and the cathode test groove which are connected by using the pressure loading device into the drilled hole, attaching the sealing device to the wall of the drilled hole, and sealing by using the sealing device;
distilled water is injected into a sealed space between the anode test groove and the cathode test groove, and pressure loading device is utilized to apply pressure to the injected distilled water towards the wall of the drilling hole, so that the distilled water stretches into the concrete to saturate the concrete;
injecting a cathode solution into the cathode test tank, injecting an anode solution into the anode test tank, connecting an anode electrode and a cathode electrode with power supply equipment, outputting a set voltage by the power supply equipment, and starting timing;
when a potential difference is generated between the chloride ion selective electrode and the reference electrode, stopping timing, and obtaining the time of the chloride ions penetrating through the concrete in unit depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111645626.4A CN114264589B (en) | 2021-12-29 | 2021-12-29 | Concrete chloride ion permeability resistance detection device and method for field environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111645626.4A CN114264589B (en) | 2021-12-29 | 2021-12-29 | Concrete chloride ion permeability resistance detection device and method for field environment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114264589A CN114264589A (en) | 2022-04-01 |
| CN114264589B true CN114264589B (en) | 2023-07-04 |
Family
ID=80831564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111645626.4A Withdrawn - After Issue CN114264589B (en) | 2021-12-29 | 2021-12-29 | Concrete chloride ion permeability resistance detection device and method for field environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114264589B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101470107A (en) * | 2007-12-27 | 2009-07-01 | 河南理工大学 | Concrete body and test instrument and method for its permeation performance with other medium bonding surface |
| CN103267719A (en) * | 2013-04-25 | 2013-08-28 | 浙江大学 | Method and system for non-contact electrical resistivity-based evaluation of permeability of cement-based material |
| CN108680469A (en) * | 2018-04-28 | 2018-10-19 | 皖西学院 | A kind of ion penetration resistance of concrete measurement method |
| CN109883927A (en) * | 2019-03-28 | 2019-06-14 | 广西大学 | Compact-bending Load acts on lower concrete chloride ion diffusion test macro and its method |
| CN211978745U (en) * | 2020-02-25 | 2020-11-20 | 苏州混凝土水泥制品研究院检测中心有限公司 | Concrete durability measuring device |
Family Cites Families (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2314930A1 (en) * | 1973-03-26 | 1974-10-10 | Battelle Institut E V | Automatic measurement of chloride penetration in concrete - by elecro-chemical analysis at varying levels in a core |
| DE3203407A1 (en) * | 1981-02-12 | 1982-09-09 | Corning Glass Works, 14830 Corning, N.Y. | REFERENCE ELECTRODE WITH ION SELECTIVE LOCK |
| JPH06317560A (en) * | 1993-04-30 | 1994-11-15 | Tokyo Electric Power Co Inc:The | Estimation method of compression strength of concrete by rapid chlorine ion permeability test |
| JP2002357591A (en) * | 2001-06-01 | 2002-12-13 | Ishikawajima Constr Materials Co Ltd | Method and device for performing salt permeation test on concrete |
| JP5411645B2 (en) * | 2009-10-06 | 2014-02-12 | 西日本高速道路株式会社 | Permeation resistance evaluation test method for concrete surface impregnated material |
| CN102297821B (en) * | 2011-05-23 | 2013-04-17 | 中国水电顾问集团中南勘测设计研究院 | Detection apparatus for impermeability of hardened concrete under constraint state, and method thereof |
| CN102359983B (en) * | 2011-07-19 | 2013-09-04 | 中国水电顾问集团中南勘测设计研究院 | Measurement apparatus for reinforcement corrosion criticality [Cl<->]/[OH<->], and method thereof |
| CN102564916A (en) * | 2012-01-16 | 2012-07-11 | 河海大学 | Fast load testing device and method for chloride ion migration coefficient of concrete |
| CN102621049B (en) * | 2012-01-16 | 2014-03-26 | 河海大学 | Concrete chloride ion migration coefficient load testing device under bending stress, and testing method thereof |
| CN103175764A (en) * | 2013-03-08 | 2013-06-26 | 石家庄铁道大学 | Method for rapidly determining chloride ion permeation resistance of concrete |
| CA2948912C (en) * | 2014-05-13 | 2022-01-04 | Giatec Scientific Ltd. | Electrical methods and systems for concrete testing |
| KR101695649B1 (en) * | 2015-12-01 | 2017-01-12 | (주)삼일피엔유 | Concrete Rapid chloride permeability test and Chloride migration coefficient test and test methods |
| CN106680180B (en) * | 2017-01-16 | 2023-05-23 | 华南理工大学 | Device, method and application for monitoring migration quantity of chloride ions across concrete |
| CN107843539A (en) * | 2017-12-13 | 2018-03-27 | 青岛理工大学 | A kind of ion penetration resistance of concrete measuring method |
| AT520779B1 (en) * | 2017-12-21 | 2020-03-15 | Erba Tech Austria Gmbh | Reference electrode for potentiometric measurement of ion concentrations |
| CN108956729A (en) * | 2018-07-27 | 2018-12-07 | 华东交通大学 | For monitoring the wireless sensor of chloride ions concentration of concrete |
| US11820681B2 (en) * | 2018-10-26 | 2023-11-21 | Robert Bosch Gmbh | Voltage-controlled anion exchange membrane enabling selective ion affinities for water desalination and device containing the same |
| KR102365086B1 (en) * | 2018-12-03 | 2022-02-18 | 주식회사 엘지에너지솔루션 | Non-destructive method for measuring active area of active material |
| CN109632607A (en) * | 2019-01-16 | 2019-04-16 | 长沙理工大学 | Twin shaft continues the chlorine ion binding capacity experimental rig and measuring method of concrete under ballast |
| CN110095348A (en) * | 2019-05-13 | 2019-08-06 | 山东交通学院 | Concrete durability experiment device and method under load-chloride erosion coupling |
| CN110082278A (en) * | 2019-05-29 | 2019-08-02 | 青岛理工大学 | A kind of ion penetration resistance of concrete measurement method |
| CN213337249U (en) * | 2020-10-22 | 2021-06-01 | 珠海春禾新材料研究院有限公司 | Chloride ion permeation resistance test device |
| CN214277836U (en) * | 2021-03-20 | 2021-09-24 | 石家庄晶石建筑工程技术有限公司 | Concrete electric flux tester |
| CN214749634U (en) * | 2021-04-02 | 2021-11-16 | 北京市政建设集团有限责任公司 | Chloride ion permeability coefficient measuring device |
| CN113237778A (en) * | 2021-04-16 | 2021-08-10 | 中国三峡建设管理有限公司 | Concrete interlayer combination quality control method |
-
2021
- 2021-12-29 CN CN202111645626.4A patent/CN114264589B/en not_active Withdrawn - After Issue
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101470107A (en) * | 2007-12-27 | 2009-07-01 | 河南理工大学 | Concrete body and test instrument and method for its permeation performance with other medium bonding surface |
| CN103267719A (en) * | 2013-04-25 | 2013-08-28 | 浙江大学 | Method and system for non-contact electrical resistivity-based evaluation of permeability of cement-based material |
| CN108680469A (en) * | 2018-04-28 | 2018-10-19 | 皖西学院 | A kind of ion penetration resistance of concrete measurement method |
| CN109883927A (en) * | 2019-03-28 | 2019-06-14 | 广西大学 | Compact-bending Load acts on lower concrete chloride ion diffusion test macro and its method |
| CN211978745U (en) * | 2020-02-25 | 2020-11-20 | 苏州混凝土水泥制品研究院检测中心有限公司 | Concrete durability measuring device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114264589A (en) | 2022-04-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102645396B (en) | Test method for improving coal rock permeability and device thereof | |
| CN110618255B (en) | Confining pressure test device for simulating stratum accumulation, installation method and test method | |
| CN114264589B (en) | Concrete chloride ion permeability resistance detection device and method for field environment | |
| CN107830960A (en) | A kind of hydrofracturing packer device | |
| CN102926369A (en) | Pre-boring pressure meter, self-boring pressure meter and self-boring pressure metering equipment | |
| AU2020103791A4 (en) | Complex resistance measurement system and method for nitrogen displacement of coal bed gas | |
| CN110984962A (en) | Fluidized gas extraction monitoring method | |
| CN110984965A (en) | Air bag type layered water pumping test system and method for drilling holes in same diameter | |
| CN210948645U (en) | Air bag type layered water pumping test system for drilling holes in same diameter | |
| CN105424896B (en) | The device of the actual mining site carbon dioxide long range foam flooding of simulation | |
| CN108955989B (en) | For determining the test device and test method of water filling cracks in coal seam internal water pressure | |
| CN114061649B (en) | Automatic quick on-line monitoring equipment for underground water quality and water level synchronization | |
| CN108869328A (en) | Suitable for depressurizing the immersible pump of method exploitation combustible ice | |
| CN102636546A (en) | Testing device for changing adsorption and desorption performances of coal rock gas in electrochemical way | |
| CN206554916U (en) | Cement sheath annular space simulated testing system | |
| CN104977143B (en) | A kind of mash gas pumping drilling device for detecting sealability | |
| CN212201989U (en) | Well cementation cement sheath performance simulation device | |
| CN208073459U (en) | A kind of frictional airbag apparatus for fixing multipoint displacement meter | |
| CN216484368U (en) | Experimental device for detect crack body model crack initiation time | |
| KR100770050B1 (en) | Injection apparatus of tracer | |
| CN206832421U (en) | A kind of submersible motor endurance testing device | |
| CN110828862B (en) | Electric energy storage device of salt cavern flow battery | |
| CN210087309U (en) | Real-time monitoring device for liquid level in petroleum well | |
| CN114279937B (en) | Nondestructive testing device for permeability resistance of concrete structure | |
| CN112483075B (en) | Water-immersed borehole gas pressure detection device and method |
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 | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20220401 |
|
| CI02 | Correction of invention patent application | ||
| CI02 | Correction of invention patent application |
Correction item: withdrawal of application for invention after its publication Correct: Withdrawal of an application for a patent for invention after its publication False: Withdrawal of invention patent application after publication Number: 46-01 Volume: 38 |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |