Water stability testing device

Abstract

The utility model relates to the technical field of road engineering, and provides a water stability testing device which comprises a test room, a bidirectional water pump, a cold water container and a hot water container, and the cold water container and the hot water container are communicated with the test room through the water pump. Meanwhile, the cold water container and the hot water container are arranged, on one hand, hot water and cold water can be provided for a test room to simulate different water environments, the test function of the test device is increased, and multi-dimensional test on the water stability of a test piece is facilitated; and on the other hand, hot water can be rapidly provided for high-temperature soaking or rapid thawing, or cold water can be provided for low-temperature soaking, the test waiting time is shortened, and the test efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of road engineering, and particularly relates to a water stability testing device. Background Art

[0002] The water stability of asphalt mixture is an important index for evaluating its durability and road performance. However, the existing testing methods usually can only evaluate a single water stability index and cannot comprehensively reflect the performance of asphalt mixture under different water environments. Therefore, it is particularly important to develop a device and method for comprehensively testing the water stability of asphalt mixture. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the defect of single testing performance of the existing asphalt mixture water stability testing device and provide a water stability testing device.

[0004] The utility model solves the above technical problem through the following technical solutions:

[0004]

[0005] A water stability testing device, the testing device includes a test chamber and a water pump, the testing device further includes a cold water container and a hot water container, the cold water container and the hot water container are communicated with the test chamber through the water pump, and the water pump is a two-way water pump.

[0006] In this solution, the water pump is a two-way water pump. By the operation of the water pump, the water in the cold water container or the hot water container can be pumped into the test chamber, or the water in the test chamber can be pumped into the cold water container or the hot water container for recycling, reducing water consumption and waste. At the same time, the cold water container and the hot water container are provided. On the one hand, hot water and cold water can be provided to the test chamber to simulate different water environments, increasing the testing functions of the testing device, so as to perform multi-dimensional testing on the water stability of the test piece. Multi-dimensional means corresponding to a variety of different water environments. On the other hand, hot water can be quickly provided to the test chamber for high-temperature soaking or rapid thawing, or cold water can be provided for low-temperature soaking, reducing the test waiting time and improving the test efficiency.

[0005]

[0007] Preferably, the testing device further includes two control valves. The cold water container is communicated with the water pump through one of the control valves, and the hot water container is communicated with the water pump through the other control valve. The two control valves are connected in parallel and communicated with the same water pump.

[0008] In this solution, the cold water container and the hot water container are communicated with the test chamber through the same water pump, which can reduce costs.

[0006]

[0009] Preferably, the testing device includes two of the water pumps, and the hot water container and the cold water container are communicated with different water pumps.

[0010] In this solution, the cold water container and the hot water container are connected to the test chamber through different water pumps, which can avoid the interference between the water circuits of the cold water container and the hot water container. In addition, it has the advantage of simple control.

[0011] Preferably, the cold water container, the hot water container, and the water pump are arranged outside the test chamber.

[0012] In this solution, on the one hand, it can avoid occupying the space of the test chamber by arranging the cold water container, the hot water container, and the water pump, which is convenient for the structural layout inside the test chamber; on the other hand, it is convenient to perform operations such as adding water, discharging water, and cleaning the cold water container and the hot water container outside the test chamber, and it is also convenient to perform maintenance operations on the water pump.

[0013] Preferably, the test device further includes a controller, and heat preservation components electrically connected to the controller are respectively arranged in the cold water container and the hot water container.

[0014] In this solution, heat preservation components are arranged in both the cold water container and the hot water container to facilitate the stable maintenance of the temperatures of cold water and hot water, and improve the reliability of supplying cold water or hot water to the test chamber. By controlling the heat preservation components through the controller, it is convenient to automatically maintain the cold water in the cold water container and the hot water in the hot water container at the set temperature.

[0015] Preferably, the test device further includes a controller; a temperature sensor, a heating component, and a refrigeration component electrically connected to the controller are arranged inside the test chamber.

[0016] In this solution, the temperature inside the test chamber can be automatically detected by the temperature sensor, and the heating component and the refrigeration component can be automatically controlled by the controller to perform heating or refrigeration, so that the set low temperature or high temperature is automatically maintained inside the test chamber.

[0017] Preferably, the test device further includes a controller; a water level sensor is arranged inside the test chamber, the cold water container and the hot water container are respectively connected to the water pump through control valves, and the control valves, the water pump, and the water level sensor are respectively electrically connected to the controller.

[0018] In this solution, the water level inside the test chamber can be automatically detected by the water level sensor, and the controller can automatically control the operation of the control valves and the water pump to automatically control the water level inside the test chamber.

[0019] Preferably, the test device further includes a clamping component, the clamping component includes a clamping fixture and a clamping fixing member, the clamping fixing member is fixed inside the test chamber, the clamping fixture is fixed on the clamping fixing member and is used for clamping the test piece; the clamping fixing member and the test chamber are detachably connected.

[0020] In this solution, by setting the clamping fixture to be detachably connected to the test chamber, the clamping fixture is detachable relative to the test chamber, facilitating the replacement of the clamping fixture for different tests and expanding the test functions of the test device.

[0021] Preferably, the test device further includes a clamping assembly, which includes a clamping fixture and a clamping fixture fixing member. The clamping fixture fixing member is fixed in the test chamber, and the clamping fixture is fixed on the clamping fixture fixing member for clamping the test piece; the clamping fixture and the clamping fixture fixing member are detachably connected.

[0022] In this solution, by setting the clamping fixture and the clamping fixture fixing member to be detachably connected, the clamping fixture is detachable relative to the test chamber, facilitating the replacement of the clamping fixture for different tests and expanding the test functions of the test device.

[0023] Preferably, the test device includes a clamping fixture fixed in the test chamber. The clamping fixture has two clamping portions with a C-shaped cross-section. The C-shaped openings of the two clamping portions face each other for jointly clamping the test piece, and there is a gap at the top of the two clamping portions; the bottoms of the two clamping portions are connected to form a bearing portion.

[0024] Preferably, the test device includes a clamping fixture fixed in the test chamber. The clamping fixture has two clamping portions with a C-shaped cross-section. The C-shaped openings of the two clamping portions face each other for jointly clamping the test piece, and there is a gap at the top of the two clamping portions; there is a gap between the bottoms of the two clamping portions.

[0025] Preferably, a flexible anti-slip member is provided inside the C-shaped opening of the clamping portion.

[0026] In this solution, the anti-slip member can be deformed to increase friction, making the clamping of the test piece by the clamping portion firm and reliable.

[0027] Preferably, a fastening bolt is provided on the clamping portion. One end of the fastening bolt is in threaded cooperation with the clamping portion and extends into the C-shaped opening of the clamping portion.

[0028] In this solution, the test piece can be fixed on the clamping portion by the fastening bolt extending into the C-shaped opening of the clamping portion and pressing against the clamping piece.

[0029] Preferably, the test device includes a loading assembly and a clamping fixture arranged in the test chamber. The clamping fixture is used for clamping the test piece. The loading assembly is arranged above the clamping fixture. The loading assembly includes a loading portion and a loading punch. The loading punch is arranged on the loading portion for applying a load to the test piece; the loading punch and the loading portion are detachably connected.

[0030] In this solution, the loading indenter and the loading part are detachably connected, which is convenient for replacing the loading indenter to conduct different working condition tests and improves the diversity of test functions.

[0031] Preferably, the test device includes a loading assembly and a clamping fixture arranged in the test chamber. The clamping fixture is used for clamping the test piece. The loading assembly is arranged above the clamping fixture. The loading assembly includes a loading part and a loading indenter. The loading indenter is arranged on the loading part and is used for applying a load to the test piece. The test device includes a variety of loading indenters. At least three loading indenters have hemispherical surfaces, flat surfaces, and conical surfaces respectively facing the surface of the clamping fixture.

[0032] Preferably, the test device includes a loading assembly and a clamping fixture arranged in the test chamber. The clamping fixture is used for clamping the test piece. The loading assembly is arranged above the clamping fixture. The loading assembly includes a loading part and a loading indenter. The loading indenter is arranged on the loading part and is used for applying a load to the test piece. The test device further includes a controller. The loading assembly further includes a pressure sensor arranged on the loading indenter or the loading part. The loading part and the pressure sensor are respectively electrically connected to the controller.

[0033] In this solution, the pressure of the loading assembly on the test piece can be fed back to the controller through the pressure sensor, which is convenient for the controller to automatically control the pressurization and depressurization processes of the test piece according to the pressure situation.

[0034] Preferably, the test device includes a loading part and a clamping assembly. The clamping assembly includes a clamping fixture and a clamping fixing part. The clamping fixing part includes two vertically arranged columns and two horizontally arranged plates. The two ends of the plate in the horizontal direction are respectively fixed on the two columns. The clamping fixture is arranged below the two plates. The two ends of the clamping fixture in the horizontal direction are respectively fixed on the two columns. Both of the two plates are provided with sliding holes penetrating in the vertical direction. The loading part is slidably arranged in the two sliding holes and is used for applying a load to the test piece.

[0035] In this solution, setting the sliding holes on the plate to limit the loading part can improve the smoothness of the loading process of the loading part. Further, setting two plates can further improve the stability.

[0036] Preferably, the test device is used for testing the water stability of asphalt mixtures.

[0037] Preferably, at least one side of the test chamber is provided with a transparent window.

[0038] In this solution, the situation inside the test chamber can be observed through the transparent window.

[0039] Preferably, the testing device further includes a controller, an input panel, a display, and a loading unit that are electrically connected to the controller. The loading unit is disposed in the test chamber and is configured to apply a load to the test piece.

[0040] In this solution, control parameters can be input into the controller through the input panel to control the test, and relevant data involved in the test can be displayed in real time through the display.

[0041] The positive and progressive effects of the present utility model are as follows:

[0042] The water pump is a two-way water pump. By operating the water pump, water in the cold water container or the hot water container can be pumped into the test chamber, or water in the test chamber can be pumped into the cold water container or the hot water container for recycling, reducing water consumption and waste.

[0043] Meanwhile, by providing both a cold water container and a hot water container, on the one hand, hot water and cold water can be provided to the test chamber to simulate different water environments, increasing the test functions of the testing device, facilitating multi-dimensional testing of the water stability of the test piece, where multi-dimensional corresponds to multiple different water environments; on the other hand, hot water can be quickly provided to the test chamber for high-temperature immersion or rapid thawing, or cold water can be provided for low-temperature immersion, reducing the test waiting time and improving the test efficiency. Description of the Drawings

[0044] Figure 1 Is a perspective view of the testing device provided in Embodiment 1 of the present utility model;

[0045] Figure 2 Is a cross-sectional view of the testing device provided in Embodiment 1 of the present utility model;

[0046] Figure 3 Is a schematic diagram of the cooperation of the loading assembly, the clamping assembly, and the test piece provided in Embodiment 1 of the present utility model;

[0047] Figure 4 Is a schematic diagram of three loading heads provided in Embodiment 1 of the present utility model;

[0048] Figure 5 Is a schematic diagram of the cooperation of two clamping jigs and the test piece provided in Embodiment 1 of the present utility model;

[0049] Figure 6 Is a perspective view of the testing device provided in Embodiment 2 of the present utility model;

[0050] Figure 7 Is a cross-sectional view of the testing device provided in Embodiment 2 of the present utility model.

[0051] Description of the Reference Numerals:

[0052] Testing device 1000;

[0053] Laboratory 1, first communication port 11, second communication port 12, door 13, water level sensor 14, refrigeration component 15;

[0054] Water pump 2;

[0055] Cold water container 31, hot water container 32, water injection port 33;

[0056] Control valve 4;

[0057] Water pipe 5;

[0058] Clamping fixture 61, clamping part 611, anti-slip part 612, fastening bolt 613, bearing part 614;

[0059] Clamping and fixing part 62, column 621, flat plate 622;

[0060] Loading component 7, loading part 71, loading punch 72, pressure sensor 73;

[0061] Input panel 81, display 82;

[0062] Specimen 2000. Specific embodiments

[0063] The present invention will be further described below by way of examples, but the present invention is not limited to the scope of the described examples.

[0064] Example 1

[0065] In this example, the specimen is asphalt mixture, and a testing device is provided for testing the water stability of asphalt mixture. Figures 1-5 It is a schematic diagram provided for this example, in which Figure 2 a partially sectional schematic diagram of the testing device 1000 is given.

[0066] As Figure 1 、 Figure 2, the test device 1000 includes a test chamber 1, a water pump 2, a hot water container 32 and a cold water container 31. The cold water container 31 and the hot water container 32 are connected to the test chamber 1 through the water pump 2. The water pump 2 is a two-way water pump 2. By operating the water pump 2, the water in the cold water container 31 or the hot water container 32 can be pumped into the test chamber 1, or the water in the test chamber 1 can be pumped into the cold water container 31 or the hot water container 32 for recycling, reducing water consumption and waste. At the same time, the cold water container 31 and the hot water container 32 are provided. On the one hand, hot water and cold water can be provided to the test chamber 1 to simulate different water environments, increasing the test function of the test device 1000, so as to perform multi-dimensional tests on the water stability of the specimen 2000. Multi-dimensional means corresponding to multiple different water environments. On the other hand, hot water can be quickly provided to the test chamber 1 for high-temperature soaking or rapid thawing, or cold water can be provided for low-temperature soaking, reducing the test waiting time and improving the test efficiency.

[0067] Such as Figure 1 , the cold water container 31 and the hot water container 32 are specifically barrel-shaped, and water injection ports 33 are provided at the tops to facilitate water injection into the containers.

[0068] In a preferred embodiment, the door 13 of the test chamber 1 can be made of transparent materials such as glass to facilitate observing the situation inside the test chamber 1 as an observation window.

[0069] In a preferred embodiment, such as Figure 1 , the test device 1000 further includes two control valves 4. The cold water container 31 and the hot water container 32 are respectively connected to the same water pump 2 through a control valve 4, which can reduce costs. Looking from Figure 1 , the cold water container 31 and one of the control valves 4 form a cold water branch, and the hot water container 32 and the other control valve 4 form a hot water branch. The cold water branch and the hot water branch are in parallel. By controlling the opening and closing of the two control valves 4, the connection object of the water pump 2 can be controlled. The cold water container 31, the hot water container 32, the control valve 4, the water pump 2, and the test chamber 1 are specifically connected through a water pipe 5, and a first communication port 11 is provided at the test chamber 1 for water inlet and drainage.

[0070] In a preferred embodiment, such as Figure 1 , the cold water container 31, the hot water container 32, and the water pump 2 are all arranged outside the test chamber 1. On the one hand, it can avoid the cold water container 31, the hot water container 32, and the water pump 2 occupying the space of the test chamber 1, facilitating the internal structure layout of the test chamber 1 and making the test chamber 1 compact. On the other hand, it is convenient to perform operations such as adding water, draining water, and cleaning on the cold water container 31 and the hot water container 32 outside the test chamber 1, and it is convenient to perform maintenance operations on the water pump 2.

[0071] In a preferred embodiment, such as Figure 2 , Figure 3 ,Figure 5 The testing device 1000 further includes a clamping assembly. The clamping assembly includes a clamping fixture 61 and a clamping fixture fixing member 62. The clamping fixture fixing member 62 is fixed in the test chamber 1, and the clamping fixture 61 is fixed on the clamping fixture fixing member 62. The test piece 2000 is clamped by the clamping fixture 61.

[0072] In a preferred embodiment, the clamping fixture fixing member 62 and the test chamber 1 can be detachably connected, so that the clamping fixture 61 is indirectly detachable relative to the test chamber 1. In a preferred embodiment, the clamping fixture 61 and the clamping fixture fixing member 62 can be detachably connected, so that the clamping fixture 61 is directly detachable relative to the test chamber 1. By setting the clamping fixture 61 to be detachable relative to the test chamber 1, it is convenient to replace the clamping fixture 61 for different tests, expanding the test functions of the testing device 1000.

[0073] In a preferred embodiment, as Figure 2 、 Figure 3 、 Figure 5 ,the clamping fixture 61 has two clamping portions 611 with a C-shaped cross-section. The C-shaped openings of the two clamping portions 611 face each other and are used to jointly clamp the test piece 2000.

[0074] In a preferred embodiment, there is a gap at the top of the two clamping portions 611, which can expose the top surface part of the test piece 2000, so as to directly apply a test load from the top of the test piece 2000.

[0075] In a preferred embodiment, two types of clamping fixtures 61 are provided, both of which are detachable relative to the test chamber 1. As Figure 5 ,in one type of clamping fixture 61, the bottoms of the two clamping portions 611 are connected to form a bearing portion 614, and the bearing portion 614 is used to support the bottom of the test piece 2000; in the other type of clamping fixture 61, a gap is formed between the bottoms of the two clamping portions 611, so that the bottom part of the test piece 2000 is exposed. These two types of clamping fixtures 61 are provided to simulate different loading conditions of the test piece 2000.

[0076] In a preferred embodiment, as Figure 3 ,a flexible anti-slip member 612 is provided inside the C-shaped opening of the clamping portion 611. The anti-slip member 612 can be deformed to increase friction, so that the clamping portion 611 clamps the test piece 2000 firmly and reliably. The anti-slip member 612 can be selected from flexible members such as rubber and sponge. The surface of the anti-slip member 612 is curved and uneven, which can increase the friction force and further improve the firmness and reliability of the clamping.

[0077] In a preferred embodiment, as Figure 3, a fastening bolt 613 is provided on the clamping part 611. One end of the fastening bolt 613 is in threaded engagement with the clamping part 611 and extends into the C-shaped opening of the clamping part 611. The test piece 2000 can be tightly fixed on the clamping part 611 by rotating the fastening bolt 613.

[0078] In a preferred embodiment, a loading assembly 7 is provided to apply a load to the test piece 2000 to simulate the loaded condition of the test piece 2000 or test the bearing capacity of the test piece 2000. In a preferred embodiment, as Figure 2 , Figure 3 , the loading assembly 7 is arranged above the clamping fixture 61 and applies a load to the test piece 2000 from top to bottom.

[0079] In a preferred embodiment, the loading assembly 7 includes a loading part 71 and a loading indenter 72. The loading indenter 72 is arranged on the loading part 71, and a load is applied to the test piece 2000 through the loading indenter 72, so as to simulate the corresponding loading situation by setting the shape of the loading indenter 72. In a preferred embodiment, the loading part 71 includes a motor and an electric telescopic rod, and the electric telescopic rod is driven by the motor to extend or retract to approach or move away from the test piece 2000. In other embodiments, the loading part 71 can adopt a pump-driven hydraulic cylinder, or a pump-driven air cylinder, or a motor-driven cam mechanism, etc., and can be specifically set according to the form of the applied load and the power requirement, etc.

[0080] In a preferred embodiment, the loading indenter 72 and the loading part 71 are detachably connected, which is convenient for replacing the loading indenter 72 to conduct different working condition tests and improves the diversity of test functions. In a preferred embodiment, as Figure 4 , the testing device 1000 includes three loading indenters 72. The surfaces of the three loading indenters 72 facing the clamping fixture 61 are respectively a hemispherical surface, a flat surface, and a conical surface, and one of the loading indenters 72 can be selected according to the test working condition.

[0081] In a preferred embodiment, as Figure 2 , Figure 3 , the clamping and fixing member 62 includes two vertically arranged columns 621 and two horizontally arranged flat plates 622. The two ends of the flat plate 622 in the horizontal direction are respectively fixed on the two columns 621. The clamping fixture 61 is arranged below the two flat plates 622, and the two ends of the clamping fixture 61 in the horizontal direction are respectively fixed on the two columns 621. Sliding holes penetrating in the vertical direction are provided on both flat plates 622, and the loading part 71 is slidably arranged in the two sliding holes for applying a load to the test piece 2000. Arranging the sliding holes on the flat plate 622 to limit the loading part 71 can improve the smoothness of the loading process of the loading part 71; further, arranging two flat plates 622 further improves the stability.

[0082] It can be understood that, in order to achieve detachable connection, methods such as threaded connection, snap connection or plug-and-play connection can be adopted; in order to achieve fixed connection, methods such as threaded connection, snap connection, plug-and-play connection, riveting or bonding can be adopted.

[0083] In a preferred embodiment, the testing device 1000 further includes a controller, and the full-automatic or semi-automatic control of the testing device 1000 is realized through the controller, improving the convenience and accuracy of the test.

[0084] In a preferred embodiment, the loading part 71 is electrically connected to the controller, such as Figure 2 , the loading assembly 7 further includes a pressure sensor 73 electrically connected to the controller. The pressure sensor 73 is arranged at the loading part 71 of the loading assembly 7. The pressure of the loading assembly 7 on the test piece 2000 can be fed back to the controller through the pressure sensor 73, facilitating the controller to automatically control the pressurization and depressurization processes of the test piece 2000 according to the fed-back pressure data. In other embodiments, the pressure sensor 73 can be arranged on the loading indenter 72.

[0085] In a preferred embodiment, the water pump 2 and the control valve 4 are respectively electrically connected to the controller, and the water pump 2 and the control valve 4 are controlled through the controller to control the process of supplying water to the test chamber 1 or pumping water out of the test chamber 1.

[0086] In a preferred embodiment, such as Figure 2 , a water level sensor 14 is arranged in the test chamber 1. The water level sensor 14 is electrically connected to the controller and feeds back a water level signal to the controller, so that the controller can control the operation of the water pump 2 and the control valve 4 according to the water level signal to automatically control the water level in the test chamber 1. The water level sensor 14 can be arranged at the water level height in the test chamber 1 that can completely submerge the test piece 2000. When the water level rises to the position where the water level sensor 14 is located, the water level sensor 14 emits a signal. At this time, the water level sensor 14 is used to detect a specific water level; or, the water level sensor 14 is used to detect the water level within a preset range. At this time, the submerged water level of the test piece 2000 can be made within the detection range of the water level sensor 14 by adjusting the position of the water level sensor 14.

[0087] In a preferred embodiment, such as Figure 2, a temperature sensor, a heating component, and a refrigeration component 15 electrically connected to the controller are provided in the test chamber 1. The temperature in the test chamber 1 can be automatically detected by the temperature sensor and the temperature signal can be fed back to the controller. The controller can automatically control the heating component to heat or control the refrigeration component 15 to refrigerate, so that the set low temperature or high temperature can be automatically maintained in the test chamber 1. In this embodiment, the refrigeration component 15 includes a condensation pipeline hidden in the inner wall of the test chamber 1, and heat exchange is carried out between the cold air in the condensation pipeline and the air in the test chamber 1 to make the temperature in the test chamber 1 reach the set low temperature; the heating component adopts an electric heating rod, and the water in the test chamber 1 is heated to soak the test piece 2000 with hot water.

[0088] In a preferred embodiment, heat preservation components are respectively provided in the cold water container 31 and the hot water container 32. The water temperature in these two containers is kept stable through the heat preservation components, so as to facilitate quickly providing the required hot water or cold water to the test chamber 1. Further, the heat preservation components are electrically connected to the controller, and the controller can automatically control the heat preservation components to work to maintain the water temperature in the cold water container 31 or the hot water container 32. The heat preservation component in the cold water container 31 can adopt a temperature sensor and a refrigerating part, and the heat preservation component in the hot water container 32 can adopt a temperature sensor and a heating part. In other embodiments, the heat preservation component can adopt forms such as a heat preservation interlayer and heat preservation cotton to keep the water in the container warm.

[0089] In a preferred embodiment, the testing device 1000 further includes an input panel 81 and a display 82 electrically connected to the controller. The operator can view the relevant data in the controller through the display 82 and can input preset parameters into the controller or call out the parameters stored in the controller through the input panel 81. The controller can be understood as a data reading and processing system.

[0090] The following method can be adopted to conduct the water stability test and evaluation on the test piece 2000:

[0091] Place the test piece 2000 in the C-shaped opening of the two clamping parts 611, place it on the anti-slip part 612, and rotate the fastening bolt 613 to fix the test piece 2000 on the clamping part 611.

[0092] When it is necessary to simulate a water immersion environment, pour water at the corresponding temperature into the cold water container 31 before the test, open the control valve 4 corresponding to the cold water container 31, close the control valve 4 corresponding to the hot water container 32, and turn on the water pump 2. The water pump 2 pumps the water in the cold water container 31 and enters the test chamber through the first communication port 11. The water level continuously rises in the test chamber until it reaches the position where the water level sensor 14 is located. The water level sensor 14 sends a prompt signal to the controller, and then the controller controls the water pump 2 to close to stop pumping water, and controls the control valve 4 corresponding to the cold water container 31 to close to prevent the water in the test chamber from flowing back. When the required water immersion time is reached, turn on the water pump 2 to pump the water in the water tank back into the cold water container 31. When it can be seen through the door 13 of the test room 1 that the water has been pumped dry, manually control to turn off the water pump 2, or when the water level sensor 14 detects that the water level in the test room 1 has dropped to the preset water level, the controller controls the water pump 2 to close.

[0093] When it is necessary to simulate freeze-thaw cycles, open the control valve 4 corresponding to the cold water container 31, close the control valve 4 corresponding to the hot water container 32, and use the water pump 2 to pump the cold water in the cold water container 31 into the test room 1. When the water level reaches the water level sensor 14, turn off the water pump 2 and turn on the refrigeration component 15 to make the temperature in the test chamber reach -10 °C and maintain it for 12 hours, and then turn off the refrigeration component 15. Close the control valve 4 corresponding to the cold water container 31, open the control valve 4 corresponding to the hot water container 32 and the water pump 2. At this time, the water temperature in the hot water container 32 is 30 °C. Pump the hot water in the hot water container 32 into the test room 1 to dissolve the ice on the test piece 2000. After complete dissolution, pump out the water in the test room 1. The above process of cold water immersion and dissolution of the test piece 2000 is one cycle, and the number of freeze-thaw cycles can be set according to the test requirements.

[0094] According to the working conditions required by the test, select the loading indenter 72 and the clamping fixture 61 of the corresponding shape, turn on the loading component 7, and set the displacement rate or test pressure of the electric telescopic rod of the loading component 7 according to the test requirements. The electric telescopic rod moves downward, and the loading indenter 72 contacts the test piece 2000 to apply a load to the test piece 2000 until the test piece 2000 is completely damaged. The pressure sensor in the loading component 7 transmits the load signal to the controller, and the controller analyzes the pressure data and the displacement data of the loading part 71 to form the deformation curve and stress curve of the test piece 2000, which are displayed on the display 82. Finally, evaluate the water stability of the test piece 2000 according to the collected data.

[0095] Using the testing device 1000 provided in this embodiment to conduct the water stability test of asphalt mixture has the following advantages:

[0096] It can realize the multi-dimensional evaluation of the water stability of asphalt mixtures. "Multi-dimensional" means that the test chamber 1 can simulate a variety of water environment conditions, such as soaking in water at different temperatures, freeze-thaw cycles, etc.;

[0097] The use of a two-way water pump 2 achieves a circulating effect, and it is water-saving and avoids waste of water resources;

[0098] The cold water container 31 and the hot water container 32 are connected to the same water pump 2 through different control valves 4, and the cold water or hot water required for extraction can be accurately controlled through the control valve 4;

[0099] The set sensors and controllers can collect data such as the deformation and stress of the specimen 2000 in real time, and perform automatic processing and analysis, and display the processing and analysis results on the display screen;

[0100] Data can be input through the input panel 81 to automatically set the time, temperature, number of cycles of the water environment to be simulated, the physical parameters of the specimen 2000, and the magnitude and rate of the load applied to the specimen 2000;

[0101] A total of three different loading indenter 72 and two different clamping fixtures 61 are designed, and 6 different load conditions can be implemented;

[0102] In summary, the testing device 1000 provided in this embodiment can simulate different water environments and comprehensively evaluate the water stability of asphalt mixtures.

[0103] Embodiment 2

[0104] In this embodiment, the specimen is an asphalt mixture, and a testing device is provided to test the water stability of the asphalt mixture. Figures 6-7 This is a schematic diagram provided for this embodiment, where Figure 7 A schematic diagram of a partial section of the testing device 1000 is given. As Figure 6 、 Figure 7 , the difference between the testing device 1000 in this embodiment and that in Embodiment 1 is mainly that two water pumps 2 are provided. The cold water container 31 and the hot water container 32 are connected to the test chamber 1 through different water pumps 2; two communication ports are provided in the test chamber 1. The first communication port 11 is connected to the cold water container 31, and the second communication port 12 is connected to the hot water container 32. The cold water container 31 and the hot water container 32 are connected to the test chamber 1 through different water pumps 2, which can avoid the interference between the water circuits of the cold water container 31 and the hot water container 32, and in addition, it has the advantage of simple control.

[0105] In a preferred embodiment, filters are provided at the first communication port 11 and the second communication port 12 for filtering the specimen particles generated by soaking.

[0106] For other structures of this embodiment, reference may be made to Embodiment 1 and other embodiments.

[0107] Although the specific embodiments of the present utility model have been described above, those skilled in the art should understand that this is only an example, and the protection scope of the present utility model is defined by the appended claims. Without departing from the principle and essence of the present utility model, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present utility model.

Claims

1. A water stability test device, the test device comprising a test chamber and a water pump, characterized in that, The test device further includes a cold water container and a hot water container. The cold water container and the hot water container are communicated with the test chamber through the water pump, and the water pump is a two-way water pump. The test device further includes two control valves. The cold water container is communicated with the water pump through one of the control valves, and the hot water container is communicated with the water pump through the other control valve. The two control valves are connected in parallel and communicated with the same water pump.

2. The water stability test device according to claim 1, characterized in that, The cold water container, the hot water container, and the water pump are arranged outside the test chamber; And / or, the test device further includes a controller, and heat preservation components electrically connected to the controller are respectively arranged in the cold water container and the hot water container.

3. The water stability test device according to claim 1, wherein The test device further includes a controller; A temperature sensor, a heating component, and a refrigeration component electrically connected to the controller are arranged in the test chamber; and / or, a water level sensor is arranged in the test chamber. The cold water container and the hot water container are respectively communicated with the water pump through control valves, and the control valves, the water pump, and the water level sensor are respectively electrically connected to the controller.

4. The water stability test device according to claim 1, characterized in that, The test device further includes a clamping component, and the clamping component includes a clamping fixture and a clamping fixing member. The clamping fixing member is fixed in the test chamber, and the clamping fixture is fixed on the clamping fixing member for clamping a test piece; The clamping fixing member and the test chamber are detachably connected; and / or, the clamping fixture and the clamping fixing member are detachably connected.

5. The water stability test device according to claim 1, characterized in that, The test device includes a clamping fixture fixed in the test chamber. The clamping fixture has two clamping parts with a C-shaped cross section. The C-shaped openings of the two clamping parts face each other for jointly clamping a test piece, and there is a gap at the top of the two clamping parts; The bottoms of the two clamping parts are connected to form a bearing part; or, there is a gap between the bottoms of the two clamping parts.

6. The water stability testing device according to claim 5, characterized in that, A flexible anti-slip member is arranged in the C-shaped opening of the clamping part; And / or, a fastening bolt is arranged on the clamping part. One end of the fastening bolt is in threaded cooperation with the clamping part and extends into the C-shaped opening of the clamping part.

7. The water stability testing device according to claim 1, characterized in that, The test device includes a loading component and a clamping fixture arranged in the test chamber. The clamping fixture is used for clamping a test piece. The loading component is arranged above the clamping fixture. The loading component includes a loading part and a loading press head. The loading press head is arranged on the loading part for applying a load to the test piece; The loading press head and the loading part are detachably connected; and / or, the test device includes a variety of loading press heads. The surfaces of at least three loading press heads facing the clamping fixture are respectively a hemispherical surface, a flat surface, and a conical surface; and / or, the test device further includes a controller. The loading component further includes a pressure sensor arranged on the loading press head or the loading part. The loading part and the pressure sensor are respectively electrically connected to the controller.

8. The water stability test device according to claim 1, characterized in that, The test device includes a loading part and a clamping assembly. The clamping assembly includes a clamping fixture and a clamping fixing member. The clamping fixing member includes two vertically arranged columns and two horizontally arranged plates. The two ends of the plates in the horizontal direction are respectively fixed on the two columns. The clamping fixture is arranged below the two plates. The two ends of the clamping fixture in the horizontal direction are respectively fixed on the two columns. Sliding holes penetrating in the vertical direction are provided on both of the two plates. The loading part is slidably arranged in the two sliding holes for applying a load to the test piece.

9. The water stability test device according to claim 1, wherein, The test device is used for testing the water stability of asphalt mixtures; And / or, at least one side of the test chamber is provided with a transparent window; And / or, the test device further includes a controller, an input panel, a display, and a loading part that are electrically connected to the controller. The loading part is arranged in the test chamber for applying a load to the test piece.

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