Testing device and method for evaluating long-term effectiveness of salt-storage asphalt mixture

Abstract

The invention discloses a device and a method for evaluating and testing the long-term effectiveness of a salt storage asphalt mixture, and the device comprises a box body, a constant temperature module, an ion concentration detection module and a water pressure control module, the test box comprises a test box body provided with a containing cavity and a cover plate detachably connected to the top of the test box body to seal the containing cavity, the test box body is provided with a water adding assembly communicated with the containing cavity, and the water adding assembly is used for adding water to soak a salt storage asphalt mixture test piece placed in the containing cavity. The cover plate is provided with an exhaust assembly used for exhausting gas in the containing cavity. The constant-temperature module is positioned in the box body and is connected to the test box; the ion concentration detection module is connected to the test box; the water pressure control module is connected to the test box; therefore, the long-term test evaluation of the salt-storage asphalt mixture test piece is more convenient, and the influence of tedious test operation and larger measurement result error caused by factors such as manual measurement of solution concentration and inconvenience in applying temperature, load and the like is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of road engineering material performance testing, and in particular to a long-term performance evaluation test device and method for salt-storage asphalt mixture. Background Art

[0002] When a road is located in an area affected by ice and snow, snow and ice on the road in winter will cause a significant decrease in the road's anti-skid performance, affecting the road's operational safety and transportation efficiency. Salt-storage pavement is a road that has the ability to melt snow and ice by adding anti-icing materials to the asphalt mixture. The ice-melting mechanism is as follows: under the action of vehicle load and pore water pressure, snow water penetrates from the pores into the asphalt mixture, the salt in the anti-icing material dissolves, and the salt gradually migrates to the road surface under the action of the concentration gradient, thereby inhibiting ice on the road surface.

[0003] The ice adhesion test, icing test, and ice melting test proposed to evaluate the anti-icing effect of salt-storage pavement can only test the short-term anti-icing performance of salt-storage asphalt. In order to evaluate the long-term anti-icing performance of salt-storage asphalt mixtures, most of the studies conducted measure the solution concentration of salt-storage asphalt mixtures after immersion in static water, which indirectly reflects its long-term release performance. However, this method has a long immersion cycle and requires manual measurement of solution concentration, which is not convenient for applying influencing factors such as temperature and load, resulting in cumbersome operation and large errors.

[0004] Therefore, how to provide a long-term evaluation test device and method for salt-storage asphalt mixture to at least partially solve the above-mentioned drawbacks is a technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0005] The purpose of the present invention is to provide a long-term evaluation test device and method for salt-storage asphalt mixture, which can avoid the influence of factors such as manual measurement of solution concentration, inconvenience in applying temperature and load, etc., which lead to cumbersome test operation and large errors in measurement results.

[0006] To achieve the above object, the present invention provides a long-term performance evaluation test device for salt-storage asphalt mixture, comprising:

[0007] The box body has a test box inside, the test box includes a test box body with a receiving cavity, and a cover plate detachably connected to the top of the test box body to seal the receiving cavity, the test box body is provided with a water adding component connected to the receiving cavity, the water adding component is used to add water to soak the salt storage asphalt mixture specimen placed in the receiving cavity, and the cover plate is provided with an exhaust component for exhausting the gas in the receiving cavity;

[0008] The constant temperature module is located in the box and connected to the test box, and is used to maintain and detect the temperature in the test box;

[0009] An ion concentration detection module, connected to the test box, is used to detect the ion concentration of the liquid in the containing chamber;

[0010] The water pressure control module is connected to the test box and is used to maintain and detect the liquid pressure in the containing cavity.

[0011] Preferably, the ion concentration detection module includes:

[0012] The ion electrode is detachably mounted on the box body, and one end of the ion electrode extends into the accommodating cavity along the opening of the test box body;

[0013] The controller is connected to all the ion electrodes through wires. The controller can control the ion electrodes to be energized to detect the ion concentration of the liquid in the containing cavity and obtain the detection information of the ion electrodes.

[0014] Preferably, a plurality of detachable partitions are provided in the accommodating chamber, the partitions are arranged horizontally to support the salt-storage asphalt mixture specimen, and the partitions are provided with through holes for liquid to penetrate;

[0015] The water pressure control module includes:

[0016] An air bag is arranged at the bottom of the accommodating cavity and below the partition;

[0017] The air compressor is connected to the air bag through a ventilation pipeline penetrating the box body and the test box body, and the air compressor can control the gas to enter and discharge the air bag;

[0018] A water pressure gauge, one end of which extends into the containing cavity along the opening of the test chamber body, and is used to detect the pressure of the liquid in the containing cavity;

[0019] The control console can obtain the detection information of the water pressure gauge and control the operation of the air compressor.

[0020] Preferably, the constant temperature module comprises:

[0021] A thermometer is arranged in the accommodating cavity and is used to detect the temperature;

[0022] A heating unit, connected to the test chamber, for heating the liquid inside the containing cavity;

[0023] A cooling unit, connected to the test chamber, for cooling the liquid inside the containing cavity;

[0024] The temperature control unit is connected to the thermometer, the heating unit and the cooling unit to control the operation of the heating unit and the cooling unit.

[0025] Preferably, the water adding assembly comprises:

[0026] The water inlet pipeline is arranged through the box body and the test box body to communicate with the accommodating cavity;

[0027] The guide piece is connected to the end of the water inlet pipe away from the accommodating chamber, the guide piece is in a flared structure, and the end of the guide piece with a smaller cross section is connected to the water inlet pipe;

[0028] The first valve is arranged on the water inlet pipeline and is used to control the flow of fluid along the water inlet pipeline.

[0029] Preferably, the exhaust assembly comprises:

[0030] An exhaust pipeline extends vertically, and the exhaust pipeline passes through the cover plate;

[0031] A second valve is provided in the exhaust pipeline and is used to control the flow of fluid along the exhaust pipeline;

[0032] The tank body is arranged on the top of the exhaust pipeline and is communicated with the exhaust pipeline.

[0033] Preferably, a drainage assembly is provided at the bottom of the test box body;

[0034] Drainage components include:

[0035] A drainage pipeline is connected to the bottom of the accommodating chamber and is used to discharge the liquid in the accommodating chamber;

[0036] The third valve is arranged in the drainage pipeline and is used to control the flow of fluid along the drainage pipeline.

[0037] Preferably, the water inlet pipeline is also provided with a flow meter.

[0038] A method for evaluating the long-term effectiveness of a salt-storage asphalt mixture is provided, which requires the use of the above-mentioned device for evaluating the long-term effectiveness of a salt-storage asphalt mixture, and comprises:

[0039] Add deionized water to a preset height of the receiving chamber through the water adding assembly, and at the same time open the exhaust assembly to connect the gas in the receiving chamber with the external gas;

[0040] Close the water adding component and the exhaust component, and heat or cool the containing cavity according to the preset time through the constant temperature module;

[0041] The cover plate is opened to place the salt storage asphalt mixture specimen in the containing chamber, and then the cover plate is closed to seal the containing chamber;

[0042] The liquid pressure in the accommodating chamber is adjusted by the water pressure control module, and the ion concentration of the liquid in the accommodating chamber is detected by the ion concentration detection module according to a preset period and a preset frequency.

[0043] Preferably, the steps of adding deionized water to a preset height of the accommodation chamber through the water adding component and simultaneously opening the exhaust component to connect the gas in the accommodation chamber with the external gas are specifically:

[0044] When deionized water is added to the containing cavity and the salt-storage asphalt mixture specimen is placed in it, the deionized water enters the slot body at the top of the exhaust component along the bottom of the exhaust pipeline in the exhaust component, and the height of the slot body is higher than the height of the cover plate.

[0045] Compared with the above-mentioned background technology, the long-term evaluation test device of salt-storage asphalt mixture provided by the present invention includes a box body, a constant temperature module, an ion concentration detection module and a water pressure control module. A test box is provided inside the box body, and the test box includes a test box body provided with a accommodating cavity, and a cover plate detachably connected to the top of the test box body to seal the accommodating cavity. The test box body is provided with a water adding component connected to the accommodating cavity, and the water adding component is used to add water to soak the salt-storage asphalt mixture specimen placed in the accommodating cavity. The cover plate is provided with an exhaust component for exhausting the gas in the accommodating cavity; the constant temperature module is located in the box body and connected to the test box, and is used to maintain and detect the temperature in the test box; the ion concentration detection module is connected to the test box, and is used to detect the ion concentration of the liquid in the accommodating cavity; the water pressure control module is connected to the test box, and is used to maintain and detect the liquid pressure in the accommodating cavity.

[0046] Specifically, a salt-storage asphalt mixture specimen can be placed in the test box composed of a test box body and a cover plate, and the salt-storage asphalt mixture specimen can be immersed in water by adding water through a water adding component, so that a constant temperature module connected to the test box maintains and detects the temperature in the test box, an ion concentration detection module connected to the test box detects the ion concentration of the liquid in the containing chamber, and a water pressure control module connected to the test box is started according to actual needs to maintain and detect the liquid pressure in the containing chamber. The use of this test device can standardize the salt leaching test process of the salt-storage asphalt mixture specimen, integrate the test loading and detection, make the long-term test evaluation of the salt-storage asphalt mixture specimen more convenient, and avoid the influence of factors such as manual measurement of solution concentration, inconvenience in applying temperature and load, which lead to cumbersome test operation and large errors in measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0048] FIG1 is a schematic structural diagram of a long-term performance evaluation test device for salt-storing asphalt mixture provided in an embodiment of the present invention.

[0049] in:

[0050] 100- cabinet;

[0051] 210 - accommodating chamber, 211 - partition, 220 - test chamber body, 230 - cover plate;

[0052] 300-water adding assembly, 310-water inlet pipeline, 311-flow meter, 320-flow guide, 330-first valve;

[0053] 400-Salt storage asphalt mixture specimen;

[0054] 500-exhaust assembly, 510-exhaust pipeline, 520-second valve, 530-tank body;

[0055] 610-thermometer, 620-heating unit, 630-cooling unit, 640-temperature control unit;

[0056] 710-ion electrode, 720-controller;

[0057] 810-air bag, 820-ventilation line, 830-water pressure gauge, 840-control console;

[0058] 900-drainage assembly, 910-drainage pipeline, 920-third valve. DETAILED DESCRIPTION

[0059] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0061] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "inside", "outside", "top" and "bottom" etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the position or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation of the present invention.

[0062] The purpose of the present invention is to provide a long-term evaluation test device and method for salt-storage asphalt mixture, which can avoid the influence of factors such as manual measurement of solution concentration, inconvenience in applying temperature and load, etc., which lead to cumbersome test operation and large errors in measurement results.

[0063] Please refer to FIG. 1 . To achieve the above-mentioned purpose, the present invention provides a salt-storage asphalt mixture long-term performance evaluation test device, including a box 100 , a constant temperature module, an ion concentration detection module and a water pressure control module.

[0064] A test box is provided inside the box body 100. The box body 100 has a certain thickness. The inner wall of the box body 100 and the outer wall of the test box are fitted to support and insulate the test box. The test box includes a test box body 220 provided with a accommodating chamber 210, and a cover plate 230 detachably connected to the top of the test box body 220 to seal the accommodating chamber 210. The test box body 220 is provided with a water adding component 300 connected to the accommodating chamber 210. The water adding component 300 is used to add water to soak the salt-storage asphalt mixture specimen 400 placed in the accommodating chamber 210. The cover plate 230 is provided with an exhaust component 500 for exhausting the gas in the accommodating chamber 210. The constant temperature module is located in the box body 100 and connected to the test box, and is used to maintain and detect the temperature in the test box. The ion concentration detection module is connected to the test box, and is used to detect the ion concentration of the liquid in the accommodating chamber 210. The water pressure control module is connected to the test box, and is used to maintain and detect the liquid pressure in the accommodating chamber 210.

[0065] It should be noted that the salt-storage asphalt mixture specimen 400 often adopts a Marshall specimen, which has a certain shape and size. The accommodating cavity 210 is configured as a cylindrical cavity that is easy to place the salt-storage asphalt mixture specimen 400, and the diameter of the cylindrical cavity can be 200mm-250mm, and the height of the cylindrical cavity can be 250mm-300mm. Preferably, the diameter of the cylindrical cavity is 200mm and the height is 250mm. The constant temperature module, the ion concentration detection module, and the water pressure control module are provided with a first switch for controlling whether each of them is running or not. In this embodiment, a second switch is also provided for controlling the simultaneous start and stop of the constant temperature module, the ion concentration detection module, and the water pressure control module.

[0066] Among them, by opening and closing the cover 230, the salt-storage asphalt mixture specimen 400 can be moved into and out of the accommodating chamber 210. When the cover 230 is closed, the contact position between the cover 230 and the test box body 220 is in a sealed state. The water added to the accommodating chamber 210 by the water adding component 300 is deionized water. When the water adding component 300 is running, the exhaust component 500 is also running. Specifically, the space in the accommodating chamber 210 is continuously occupied during the addition of deionized water, so that the air originally in the accommodating chamber 210 is continuously discharged to the outside of the box body 100. When the addition of deionized water stops, the exhaust component 500 is closed at the same time to maintain a stable internal environment in the accommodating chamber 210.

[0067] The salt-storage asphalt mixture specimen 400 can be placed in the test box composed of the test box body 220 and the cover plate 230, and the salt-storage asphalt mixture specimen 400 can be immersed in water by adding water through the water adding component 300, so that the constant temperature module connected to the test box maintains and detects the temperature in the test box, and the ion concentration detection module connected to the test box detects the ion concentration of the liquid in the accommodating chamber 210, and the water pressure control module connected to the test box is started according to actual needs to maintain and detect the liquid pressure in the accommodating chamber 210. The use of this test device can standardize the salt leaching test process of the salt-storage asphalt mixture specimen 400, and integrate the test loading and detection settings, so that the long-term test evaluation of the salt-storage asphalt mixture specimen 400 is more convenient, avoiding the influence of manual measurement of solution concentration, inconvenience in applying temperature and load, etc., which leads to cumbersome test operation and large errors in measurement results.

[0068] It should be noted that the ion concentration detection module includes an ion electrode 710 and a controller 720. A mounting hole is opened along a side wall of the box body 100. The ion electrode 710 is detachably installed in the mounting hole of the box body 100, and one end of the ion electrode 710 extends into the accommodating cavity 210 along the opening of the test box body 220; the controller 720 is connected to all the ion electrodes 710 through wires, and the controller 720 can control the ion electrodes 710 to be energized to detect the ion concentration of the liquid in the accommodating cavity 210 and obtain the detection information of the ion electrode 710.

[0069] Among them, the mounting holes correspond to the openings one by one, and the corresponding mounting holes and the openings extend in the same direction. When the ion electrode 710 is installed in the mounting hole and the detection end extends into the accommodating cavity 210 along the opening, the ion electrode 710 and the opening are in a sealed state. When the ion electrode 710 is not installed on the opening, a plugging cover can be set at the corresponding position. The sealing of the opening is achieved by the detachable connection between the plugging cover and the opening. Multiple ion electrodes 710 can be installed on the box 100 at the same time, and the multiple ion electrodes 710 can be at different heights to detect ion concentrations at different depths. The specific electrode can be replaced according to the ion category to be detected. The ion category that can be detected is Na + , Cl - , Ca 2+ Mg 2+ The controller 720 can collect data at a time interval of 0.5 seconds to 1 day, and the first collection time can be based on the start of the test.

[0070] In this embodiment, a plurality of detachable partitions 211 are provided in the accommodating chamber 210, and support members for supporting and fixing the partitions 211 are provided at different heights of the inner wall of the accommodating chamber 210, so as to be used for layered placement of the partitions 211. The partitions 211 are horizontally arranged to support the salt-storage asphalt mixture specimens 400, and the partitions 211 are provided with through holes for liquid to pass through. Through the partitions 211, a plurality of salt-storage asphalt mixture specimens 400 can be placed at different heights in the accommodating chamber 210, and the plurality of salt-storage asphalt mixture specimens 400 do not affect each other. Through the through holes, the liquid in the accommodating chamber 210 can flow to different heights, thereby improving the liquid In order to improve the flow effect of the body, the partition 211 can be made of steel plate. The water pressure control module includes an airbag 810, an air compressor, a water pressure gauge 830 and a control console 840. The airbag 810 is arranged at the bottom of the accommodating chamber 210 and is located below the partition 211. It is separated from the upper space by the partition 211 with holes to avoid interference between the airbag 810 and the position of the salt-storage asphalt mixture specimen 400. The airbag 810 is partially or even completely made of elastic material, so that the gas inside the airbag 810 can change the shape of the airbag 810. At the same time, the position of the airbag 810 avoids direct contact between the airbag 810 and the salt-storage asphalt mixture specimen 400.

[0071] The air compressor is connected to the airbag 810 through the ventilation pipe 820 that penetrates the box body 100 and the test box body 220. The air compressor can control the gas to enter and discharge the airbag 810. When the water pressure test is performed, the air compressor discharges the gas into the airbag 810, so that the volume of the airbag 810 increases to squeeze the deionized water in the accommodating chamber 210, so as to change the pressure of the deionized water on the salt storage asphalt mixture specimen 400; one end of the water pressure gauge 830 extends into the accommodating chamber 210 along the opening of the test box body 220, and is used to detect the pressure of the accommodating chamber 210. The console 840 can obtain the detection information of the water pressure gauge 830 and control the operation of the air compressor, wherein the console 840 can adjust the water pressure to 0.1MPa-0.5MPa, control the pressure change frequency to 0.1Hz-1Hz, and adjust the pressure application time to 1h-7d. For example, the console 840 controls the air compressor to discharge gas into the airbag 810 to increase the water pressure. When the water pressure gauge 830 detects that the water pressure value changes to the preset water pressure, the console 840 controls the air compressor to perform a pressure alternation test and maintain a certain test time.

[0072] In this embodiment, the constant temperature module includes a thermometer 610, a heating unit 620, a cooling unit 630 and a temperature control unit 640. The thermometer 610 is arranged in the accommodating cavity 210 for detecting the temperature; the heating unit 620 is connected to the test box for heating the liquid inside the accommodating cavity 210; the cooling unit 630 is connected to the test box for cooling the liquid inside the accommodating cavity 210; the temperature control unit 640 is connected to the thermometer 610, the heating unit 620 and the cooling unit 630 to control the operation of the heating unit 620 and the cooling unit 630.

[0073] Among them, the heating unit 620 and the cooling unit 630 can be assembled inside the box 100 and adjacent to the test box. The operation of the heating unit 620 or the cooling unit 630 is controlled by the temperature control unit 640 to adjust the temperature inside the test box, and the detection information of the thermometer 610 is used to provide real-time feedback on the heating or cooling effect. The temperature control unit 640 can be set on the outer wall of the box 100. The staff can control the temperature through the information on the display screen of the temperature control unit 640 and the heating or cooling buttons. The constant temperature water tank can set the water temperature to 0-60°C.

[0074] In this embodiment, the water adding assembly 300 includes a water inlet pipeline 310, a guide member 320 and a first valve 330. The water inlet pipeline 310 is arranged through the box body 100 and the test box body 220 to connect the accommodating chamber 210. The water inlet pipeline 310 includes a horizontal section and a vertical section. The horizontal section is connected to the top of the accommodating chamber 210 so that deionized water flows along the vertical section to the horizontal section and then enters the accommodating chamber 210. The end of the pipeline extending from the horizontal section into the accommodating chamber 210 is provided with a baffle for changing the flow direction of the liquid so that the liquid flows downward along the cavity wall of the accommodating chamber 210 as much as possible to avoid impact on other components during the flow of the liquid. The guide member 320 is connected to the At one end of the water inlet pipe 310 away from the accommodating chamber 210, the guide member 320 has a flared structure, and the end with a smaller cross-section of the guide member 320 is connected to the vertical section of the water inlet pipe 310 to facilitate the liquid adding process, and the speed of the liquid is buffered to a certain extent by bending at the connection between the vertical section and the horizontal section. The first valve 330 is arranged in the vertical section of the water inlet pipe 310 to control the on and off of the fluid along the water inlet pipe 310. The height of the first valve 330 should be higher than the height of the top of the test box to facilitate the liquid to fill the accommodating chamber 210. The water inlet pipe 310 is also provided with a flow meter 311 to measure the liquid added to the accommodating chamber 210.

[0075] The exhaust assembly 500 includes an exhaust pipeline 510, a second valve 520 and a trough body 530. The exhaust pipeline 510 extends vertically and is penetrated through the cover plate 230. The second valve 520 is arranged on the exhaust pipeline 510 to control the on and off of the fluid along the exhaust pipeline 510. The trough body 530 is arranged on the top of the exhaust pipeline 510 and is connected to the exhaust pipeline 510. The trough body 530 is a barrel-shaped structure or a trough-shaped structure whose bottom is connected to the exhaust pipeline 510 and has a certain accommodating space. The part of the exhaust pipeline 510 located above the cover plate 230 is a hard pipe that can support the trough body 530, and the second valve 520 is located above the cover plate 230, which is convenient for the staff to perform on and off control.

[0076] In addition, a drainage assembly 900 is provided at the bottom of the test box body 220; the drainage assembly 900 includes a drainage pipeline 910 and a third valve 920. The drainage pipeline 910 is connected to the bottom of the accommodating chamber 210 and is used to discharge the liquid in the accommodating chamber 210; the third valve 920 is provided on the drainage pipeline 910 and is used to control the flow of the fluid along the drainage pipeline 910. During the test, the third valve 920 is closed to ensure that the liquid can be accommodated in the accommodating chamber 210. When the test is completed, the liquid in the accommodating chamber 210 is discharged through the third valve 920 to avoid affecting the next test.

[0077] The salt-storage asphalt mixture long-term evaluation test device provided in this embodiment can automatically collect the solution ion concentration, which is convenient for the long-term immersion test of the salt-storage asphalt mixture specimen 400. Compared with the ordinary static water immersion test, it can consider the comprehensive effect of temperature and dynamic water pressure on the long-term release of the salt-storage asphalt mixture specimen 400. The replaceable ion electrode 710 is suitable for different types of anti-icing materials, which increases the accuracy of the results. The device is easy to operate and has strong practicality.

[0078] A method for evaluating the long-term effectiveness of a salt-storage asphalt mixture is provided, which requires the use of the above-mentioned salt-storage asphalt mixture long-term effectiveness evaluation test device, including: adding deionized water to a preset height of a containing chamber 210 through a water adding component 300, and simultaneously opening an exhaust component 500 to connect the gas in the containing chamber 210 with the external gas; closing the water adding component 300 and the exhaust component 500, and heating or cooling the containing chamber 210 according to a preset time through a constant temperature module; opening a cover plate 230 to place a salt-storage asphalt mixture specimen 400 in the containing chamber 210; closing the cover plate 230 to seal the containing chamber 210; adjusting the liquid pressure in the containing chamber 210 through a water pressure control module, and detecting the ion concentration of the liquid in the containing chamber 210 through an ion concentration detection module according to a preset period and a preset frequency. The order of the above steps can also be adjusted according to actual conditions. For example, a small amount of deionized water can be added after the salt-storage asphalt mixture specimen 400 is placed, so as to achieve the above purpose.

[0079] Among them, the step of adding deionized water to a preset height is specifically as follows: when deionized water is added to the containing chamber 210 and the salt-storage asphalt mixture specimen 400 is placed in it, the deionized water enters the groove body 530 at the top of the exhaust component 500 along the bottom of the exhaust pipe 510 in the exhaust component 500, and the height of the groove body 530 is higher than the height of the cover plate 230.

[0080] When the dynamic pressure is not considered, the detection steps for the salt-storage asphalt mixture specimen 400 are as follows: open the cover plate 230, add deionized water through the water adding assembly 300 to cover the position of the ion electrode 710, close the first valve 330, and record the reading change of the flow meter 311; open the ion concentration detection module and the constant temperature module, set the concentration display reading corresponding to the ion electrode 710 to zero, and set the insulation temperature of the test box to the required test temperature, close the cover plate 230 to keep it warm for 0.5h-4h; open the cover plate 230, place the salt-storage asphalt mixture specimen 400 to be tested in the test box, close the cover plate 230, and set the ion concentration detection module to detect the ion concentration of the liquid in the containing chamber 210 according to the preset period and preset frequency according to the test requirements; after waiting for the test to be completed, open the cover plate 230, take out the salt-storage asphalt mixture specimen 400, record the collected data, open the third valve 920 to drain the liquid in the containing chamber 210, and turn off the main power supply.

[0081] When the dynamic water pressure is considered, the detection steps for the salt-storage asphalt mixture specimen 400 are as follows: connect the water pressure control console 840 to the air compressor, open the cover plate 230, add deionized water from the water inlet pipe 310 to the containing chamber 210, and add the salt-storage asphalt mixture specimen 400 so that the water does not overflow; turn on the ion concentration detection device and the constant temperature module, set the concentration display reading corresponding to the ion electrode 710 to zero, and set the insulation temperature of the test box to the required test temperature, close the cover plate 230 and keep it warm for 0.5h-4h; open the cover plate 230, place the salt-storage asphalt mixture specimen 400 to be tested in the test box, close the cover plate 230, and open the second valve 5 20. Add deionized water from the water inlet pipe 310 until the water level of the exhaust pipe 510 is higher than the cover plate 230, close the first valve 330 and the second valve 520, and record the changes in the flow meter 311; according to the test requirements, set the ion concentration detection module to detect the ion concentration of the liquid in the containing chamber 210 according to the preset period and preset frequency, set the water pressure value, pressure change frequency and period through the water pressure control module, and start the test; after waiting for the test to be completed, close the water pressure control module, open the cover plate 230, take out the salt-storage asphalt mixture specimen 400, record the collected data, open the third valve 920 to drain the liquid in the containing chamber 210, and turn off the main power.

[0082] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0083] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0084] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A salt-storage asphalt mixture long-term performance evaluation test device, characterized in that: include: A box body, wherein a test box is provided inside, the test box comprising a test box body provided with a containing cavity, and a cover plate detachably connected to the top of the test box body to seal the containing cavity, the test box body is provided with a water adding component connected to the containing cavity, the water adding component is used to add water to soak the salt storage asphalt mixture specimen placed in the containing cavity, and the cover plate is provided with an exhaust component for exhausting the gas in the containing cavity; A constant temperature module, located in the box and connected to the test box, for maintaining and detecting the temperature in the test box; An ion concentration detection module, connected to the test box, for detecting the ion concentration of the liquid in the containing chamber; The water pressure control module is connected to the test box and is used to maintain and detect the liquid pressure in the accommodating chamber.

2. The long-term performance evaluation test device for salt-storage asphalt mixture according to claim 1 is characterized in that: The ion concentration detection module comprises: An ion electrode is detachably mounted on the box body, and one end of the ion electrode extends into the accommodating cavity along the opening of the test box body; A controller is connected to all the ion electrodes through wires, and the controller can control the ion electrodes to be energized to detect the ion concentration of the liquid in the containing chamber and obtain the detection information of the ion electrodes.

3. The long-term performance evaluation test device for salt-storage asphalt mixture according to claim 1 is characterized in that: A plurality of detachable partitions are provided in the accommodating cavity, the partitions are horizontally arranged to support the salt-storage asphalt mixture specimen, and the partitions are provided with through holes for liquid to penetrate; The water pressure control module comprises: An air bag, arranged at the bottom of the accommodating cavity and below the partition; An air compressor is connected to the air bag through a ventilation pipeline passing through the box body and the test box body, and the air compressor can control the gas to enter and discharge from the air bag; A water pressure gauge, one end of which extends into the containing cavity along the opening of the test box body, and is used to detect the pressure of the liquid in the containing cavity; The control console is capable of acquiring the detection information of the water pressure gauge and controlling the operation of the air compressor.

4. The long-term performance evaluation test device for salt-storage asphalt mixture according to claim 1 is characterized in that: The constant temperature module comprises: A thermometer is disposed in the accommodating cavity and is used to detect temperature; A heating unit, connected to the test box, for heating the liquid inside the containing cavity; A cooling unit, connected to the test box, for cooling the liquid inside the containing cavity; A temperature control unit is connected to the thermometer, the heating unit and the cooling unit to control the operation of the heating unit and the cooling unit.

5. The long-term performance evaluation test device for salt-storage asphalt mixture according to any one of claims 1 to 4, characterized in that: The water adding assembly comprises: A water inlet pipeline is provided through the box body and the test box body to communicate with the accommodating cavity; A flow guide member connected to an end of the water inlet pipe away from the accommodating chamber, the flow guide member is in a flared structure, and an end of the flow guide member with a smaller cross-section is connected to the water inlet pipe; The first valve is arranged on the water inlet pipeline and is used to control the flow of fluid along the water inlet pipeline.

6. The salt-storage asphalt mixture long-term performance evaluation test device according to claim 5, characterized in that: The exhaust assembly comprises: An exhaust pipeline extends vertically, and the exhaust pipeline passes through the cover plate; A second valve, disposed in the exhaust pipeline, for controlling the flow of fluid along the exhaust pipeline; The tank body is arranged on the top of the exhaust pipeline and is communicated with the exhaust pipeline.

7. The long-term performance evaluation test device for salt-storage asphalt mixture according to claim 5, characterized in that: A drainage assembly is provided at the bottom of the test box body; The drainage assembly comprises: A drainage pipeline, connected to the bottom of the accommodating chamber, for discharging the liquid in the accommodating chamber; The third valve is arranged in the drainage pipeline and is used to control the flow of fluid along the drainage pipeline.

8. The long-term performance evaluation test device for salt-storage asphalt mixture according to claim 5, characterized in that: The water inlet pipeline is also provided with a flow meter.

9. A method for evaluating the long-term effectiveness of salt-storage asphalt mixtures, which requires the use of the long-term effectiveness evaluation test device for salt-storage asphalt mixtures as described in any one of claims 1 to 8, characterized in that: include: Add deionized water to a preset height of the accommodating chamber through the water adding component, and simultaneously open the exhaust component to allow the gas in the accommodating chamber to communicate with the external gas; Close the water adding component and the exhaust component, and heat or cool the containing chamber according to a preset time by a constant temperature module; Opening the cover plate to place the salt-storage asphalt mixture specimen in the containing cavity, and then closing the cover plate to seal the containing cavity; The liquid pressure in the containing chamber is adjusted by the water pressure control module, and the ion concentration of the liquid in the containing chamber is detected by the ion concentration detection module according to a preset period and a preset frequency.

10. The long-term performance evaluation test method for salt-storage asphalt mixture according to claim 9, characterized in that: The steps of adding deionized water to a preset height of the accommodating chamber through the water adding component and simultaneously opening the exhaust component to connect the gas in the accommodating chamber with the external gas are specifically as follows: When deionized water is added to the containing cavity and the salt-storage asphalt mixture specimen is placed therein, the deionized water enters the groove body at the top of the exhaust component along the bottom of the exhaust pipeline in the exhaust component, and the height of the groove body is higher than the height of the cover plate.

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