Hydraulic engineering asphalt concrete slope flow value testing device and application method thereof

Abstract

The invention provides a hydraulic asphalt concrete slope flow value testing device and an application method thereof. The device comprises a slope flow plate, a test piece base, a first wire, a displacement meter, a multimeter, a second wire, a stabilizer, an angle adjusting device, a test piece, a metal sheet and a third wire. According to the asphalt concrete test piece prepared by using the test mold, a metal sheet is arranged on one side of the asphalt concrete test piece, and the metal sheet can be in contact with a probe of a displacement sensor. The leads led out from the asphalt concrete test piece are connected in series and are connected to the other end of the multimeter. According to the invention, the problems of infirm connection between the test piece and the metal sheet, tedious bonding process, long reading time, low test precision and the like in a hydraulic concrete slope flow value test are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of water conservancy and hydropower engineering tests, and in particular relates to a hydraulic asphalt concrete slope flow value test device and an application method thereof. Background Art

[0002] Hydraulic asphalt concrete is a composite material with good anti-seepage performance and strong deformation capacity. It is widely used in water conservancy and hydropower anti-seepage projects, such as asphalt concrete anti-seepage core walls and asphalt concrete anti-seepage panels. One of the important factors affecting the durability and anti-seepage performance of asphalt concrete anti-seepage panels is high temperature stability. Especially in most areas south of the Qinling Mountains, where the temperature is high in summer and the surface temperature of asphalt concrete anti-seepage panels can reach above 70°C under the sun. In a high temperature environment, the softening of the asphalt mortar inside the asphalt concrete and the asphalt concrete panel at a certain slope will cause it to flow and deform, mainly shear deformation and slope flow. Slope flow refers to the softening of the asphalt mortar in the anti-seepage layer panel at high temperature, the separation of aggregate and asphalt, and the flow of the anti-seepage panel, which leads to a decrease in the anti-seepage performance of the panel.

[0003] The current test method for testing the slope flow of asphalt concrete is the slope flow value test. In the prior art, the slope flow value test of asphalt concrete has the following problems: during the test, the connection between the specimen and the metal sheet is not firm, the bonding process is cumbersome, and the test accuracy of the slope flow value of the specimen is low.

[0004] Therefore, based on the material properties of asphalt concrete, research on the asphalt concrete slope flow test device and application method has theoretical significance and engineering practical value. Summary of the invention

[0005] In view of the defects in the prior art, the present invention provides a hydraulic asphalt concrete slope flow value test device and an application method thereof, which can effectively solve the above problems.

[0006] The technical solution adopted by the present invention is as follows:

[0007] An object of the present invention is to provide a hydraulic asphalt concrete slope flow value test device, comprising a slope flow plate (1), a test piece base (2), a first wire (3), a displacement meter (4), a multimeter (5), a second wire (6), a stabilizer (7), an angle adjustment device (8), a test piece (9), a metal sheet (10) and a third wire (11);

[0008] A plurality of the specimen bases (2) are arranged on the surface of the slope flow plate (1), and a specimen (9) is placed on each of the specimen bases (2); the metal sheet (10) is bonded to the side surface of each of the specimens (9); and each of the metal sheets (10) is connected to a third wire (11);

[0009] A displacement meter (4) is installed on the surface of the slope flow plate (1) at one side of each test piece base (2), and a sensor probe of the displacement meter (4) is in contact with the metal sheet (10) corresponding to one of the test pieces (9);

[0010] After the displacement meters (4) are connected in series via the first wire (3), one end of the first wire (3) is connected to one end of the multimeter (5);

[0011] The third wires (11) connected to the metal sheets (10) of the test pieces (9) are connected in series and fixed together, and are connected in series with one end of a second wire (6), and the other end of the second wire (6) is connected to the other end of the multimeter (5);

[0012] The angle adjustment device (8) is arranged below the slope flow plate (1); and the stabilizer (7) is arranged below the angle adjustment device (8).

[0013] Preferably, the slope flow plate (1) is an iron plate, and the slope flow plate (1) has a slot reserved for placing the specimen base (2).

[0014] Preferably, the number of the specimen base (2) and the number of the displacement meters (4) are both 6.

[0015] Preferably, the angle adjustment device (8) is supported by an arc-shaped support plate, and a curved groove is left in the middle of the arc-shaped support plate, and the slope of the slope flow plate (1) is adjusted by loosening or tightening a movable bolt.

[0016] Preferably, it also includes a test mold for preparing the test piece (9);

[0017] The test piece (9) prepared by the test mold forms a plane for bonding the metal sheet (10) on the side of the test piece (9).

[0018] Preferably, the test mold comprises a test mold wall (12), a test mold screw lock (13) and a metal shaft (14);

[0019] The test mold wall (12) comprises two semicircular test mold walls that are symmetrically buckled together; after the two semicircular test mold walls are buckled together, one end is connected by the metal shaft (14), so that the two semicircular test mold walls can be rotated around the metal shaft (14) to open or buckle; the other ends of the two semicircular test mold walls are connected and fixed by the test mold screw lock buckle (13);

[0020] A plane is provided on one side of the interior of the test mold wall (12) for forming a side plane of the test piece (9).

[0021] Another object of the present invention is to provide a slope flow value test method using a hydraulic asphalt concrete slope flow value test device, comprising the following steps:

[0022] Step 1, specimen molding:

[0023] Step 1.1, preparing asphalt concrete raw materials and preparing asphalt mixture according to different mix ratio parameters;

[0024] Step 1.2, laboratory molding test piece (9):

[0025] Install the test mold screw lock buckle (13) on the test mold, put it in an oven to heat it to 100-110°C in advance, and apply a mold release agent inside the test mold before loading the asphalt mixture;

[0026] Prepare an asphalt mixture according to the selected mix ratio, pour it into a test mold, use a tamping rod to tamp the asphalt mixture until it is smooth, and use manual compaction or Marshall compaction instrument compaction to compact the front and back sides 20 or 35 times, the compaction times are based on the density of the test piece (9) reaching ±1% of the Marshall standard compaction test piece density, and the height dimension deviation is ±1mm;

[0027] Step 2, demoulding and polishing of the specimen:

[0028] After the compacted specimen (9) is completely cooled, demoulding is performed; then, the plane area on the side of the specimen (9) for bonding the metal sheet (10) is polished to expose the aggregate, and at the same time, the upper and lower ends of the specimen (9) are polished to be flat and numbered;

[0029] Step 3, adjust the slope of the ramp flow device:

[0030] Using an angle adjustment device (8) to adjust the slope gradient of the slope flow plate (1) to a slope specified in the design;

[0031] Step 4, measuring the size and porosity of the test piece (9):

[0032] Measure the size and porosity of the test piece (9). If the size and porosity do not meet the standard, return to step 2 and reprocess. After the size and porosity of the test piece (9) meet the standard, execute step 5.

[0033] Step 5, install the test piece (9), connect the wires in series and debug the connection effect between the displacement meter (4) and the metal sheet (10):

[0034] The metal sheet (10) is bonded to a plane area of ​​the test piece (9) 50 mm from the bottom thereof by using high-performance AB glue, and a third wire (11) is connected to the metal sheet (10); after the test piece (9) and the metal sheet (10) are firmly bonded, the test piece (9) is bonded to the test piece base (2) until the test piece (9) and the test piece base (2) are firmly bonded;

[0035] The wires led out of each displacement meter (4) are connected in series through a first wire (3) and then connected to one end of a multimeter (5); after the test piece (9) is mounted on a test piece base (2), the third wires (11) led out of the metal sheet (10) of each test piece (9) are connected in series and connected in series with one end of a second wire (6); the other end of the second wire (6) is connected to the other end of the multimeter (5);

[0036] Turn on the multimeter (5), rotate a displacement meter (4) until the multimeter (5) emits a buzzing sound, stop rotating and rotate the displacement meter (4) in the opposite direction to disconnect the displacement meter (4) from the metal sheet (10); check all displacement meters (4) in turn according to the above steps; if the displacement meter (4) still does not emit a buzzing sound after being connected to the metal sheet (10), check whether the metal sheet (10) and the third wire (11), and the displacement meter (4) and the first wire (3) are in poor contact, and re-bond them;

[0037] Step 6, start the test and measure the displacement meter readings at different test times:

[0038] Adjust the oven temperature to the test temperature and wait until the oven stabilizes to the test temperature;

[0039] Before placing the ramp flow device into the oven, adjust the displacement meter (4) and read the initial reading of the displacement meter (4) corresponding to each test piece (9), which is recorded as U i0 , represents the initial reading of the i-th specimen;

[0040] When the oven stabilizes to the test temperature, place the ramp flow device in the oven; after the test starts, take the ramp flow device out of the oven and read the readings at 1h, 2h, 4h, 6h, 8h, 12h, 24h, 36h, and 48h. The readings corresponding to each time are recorded as U i1 , U i2 , U i4 , Ui6 , U i8 , U i12 , U i24 , U i36 , U i48 ;

[0041] Step 7: After 48 hours of testing, the slope flow value of each specimen at different times is calculated and the slope flow value-time curve is plotted to further determine whether the deformation of the asphalt concrete specimen has a convergence trend.

[0042] Preferably, in step 7, the slope flow value at each time j is calculated using the following formula:

[0043] U” ij =U i0 -U ij

[0044] in:

[0045] U” ij represents the slope flow value of the i-th specimen at the j-th test time;

[0046] U ij Represents the displacement meter reading of the i-th specimen at the j-th test time;

[0047] U i0 Represents the initial reading of the i-th specimen.

[0048] The hydraulic asphalt concrete slope flow value test device and application method provided by the present invention have the following advantages:

[0049] The present invention provides a hydraulic asphalt concrete slope flow value test device and an application method thereof, which solves the problems existing in the existing asphalt concrete slope flow value test, such as unstable placement of the slope flow device during the test, loose adhesion between the test piece and the metal patch, long reading time, cumbersome test process, low test accuracy, etc. The present invention can conveniently and easily perform the slope flow value test and improve the test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solution of the present invention, the drawings required to be used in the embodiments will be described below.

[0051] Figure 1 It is a test process flow chart of an application method of a hydraulic asphalt concrete slope flow value test device of the present invention;

[0052] Figure 2 It is a top view schematic diagram of a hydraulic asphalt concrete slope flow value test device of the present invention;

[0053] Figure 3It is a side view schematic diagram of a hydraulic asphalt concrete slope flow value test device of the present invention;

[0054] Figure 4 It is a schematic diagram of a specimen of a hydraulic asphalt concrete slope flow value test device of the present invention;

[0055] Figure 5 It is a top view of a test mold of a hydraulic asphalt concrete slope flow value test device of the present invention;

[0056] Figure 6 It is a partial enlarged view of a side view of a test mold of a hydraulic asphalt concrete slope flow value test device of the present invention;

[0057] Figure 7 The present invention is a side view of a test mold of a hydraulic asphalt concrete slope flow value test device.

[0058] In the figure: 1. slope flow plate; 2. specimen base; 3. first conductor; 4. displacement meter; 5. multimeter; 6. second conductor; 7. stabilizer; 8. angle adjustment device; 9. specimen; 10. metal sheet; 11. third conductor; 12. test mold wall; 13. test mold screw lock; 14. metal shaft. DETAILED DESCRIPTION

[0059] The following is a clear and complete description of the experimental scheme in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. 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] The present invention provides a hydraulic asphalt concrete slope flow value test device and an application method thereof, which solves the problems existing in the existing asphalt concrete slope flow value test, such as unstable placement of the slope flow device during the test, loose adhesion between the test piece and the metal patch, long reading time, cumbersome test process, low test accuracy, etc. The present invention can conveniently and easily perform the slope flow value test and improve the test accuracy.

[0061] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0062] like Figure 2 , Figure 3 As shown, an embodiment of the present invention provides a hydraulic asphalt concrete slope flow value test device, including a slope flow plate 1, a specimen base 2, a first wire 3, a displacement meter 4, a multimeter 5, a second wire 6, a stabilizer 7, an angle adjustment device 8, a specimen 9, a metal sheet 10 and a third wire 11;

[0063] The slope flow plate 1 is an iron plate, and a slot is reserved in the slope flow plate 1 for placing the specimen base 2. Through the slot, the specimen 9 can be placed on the slope flow plate 1 firmly without loosening.

[0064] A plurality of specimen bases 2 are arranged on the surface of the slope flow plate 1, and a specimen 9 is placed on each of the specimen bases 2; the present invention does not limit the number of specimen bases 2 and displacement meters 4, and in the accompanying drawings, the number of specimen bases 2 and displacement meters 4 is both 6.

[0065] The metal sheet 10 is bonded to the side of each test piece 9; each metal sheet 10 is connected to one third wire 11;

[0066] The surface of the slope flow plate 1 is located on one side of each specimen base 2, and a displacement meter 4 is installed correspondingly. The sensor probe of the displacement meter 4 is in contact with the metal sheet 10 corresponding to a specimen 9. As an embodiment, each displacement meter 4 is fixed on the slope flow plate 1, and the displacement meter 4 is horizontal to the slope flow plate 1 at a distance of 50 mm.

[0067] like Figure 2 As shown, in the embodiment of the present invention, each displacement meter 4 is connected in series through the first wire 3 and fixed together, and one end of the wire is led out, so that one end of the first wire 3 is connected to one end of the multimeter 5;

[0068] The third wires 11 connected to the metal sheets 10 of the test pieces 9 are connected in series and fixed together, and are connected in series with one end of the second wire 6, and the other end of the second wire 6 is connected to the other end of the multimeter 5;

[0069] like Figure 3 As shown, in the embodiment of the present invention, the angle adjustment device 8 is arranged below the slope flow plate 1; specifically, the angle adjustment device 8 is supported by an arc-shaped support plate, and a curved groove is left in the middle of the arc-shaped support plate, and the slope of the slope flow plate 1 is adjusted by loosening and tightening the movable bolts.

[0070] like Figure 3 As shown, in the embodiment of the present invention, the stabilizer 7 is arranged below the angle adjustment device 8 .

[0071] like Figure 5 , Figure 6 , Figure 7As shown, in an embodiment of the present invention, a test mold for preparing the test piece 9 is also provided; the test piece 9 prepared by the test mold using the newly designed test mold forms a plane for bonding the metal sheet 10 on the side of the test piece 9.

[0072] The test mold includes a test mold wall 12, a test mold screw lock 13 and a metal shaft 14;

[0073] The test mold wall 12 includes two semicircular test mold walls that are symmetrically buckled together; after the two semicircular test mold walls are buckled together, one end is connected by the metal shaft 14, so that the two semicircular test mold walls can be rotatably opened or buckled around the metal shaft 14; the other ends of the two semicircular test mold walls are connected and fixed by the test mold screw lock 13; therefore, the test mold screw lock 13 can tighten and fix the other end of the test mold wall 12.

[0074] A plane of, for example, 10 mm is provided on one side of the interior of the test mold wall 12 to form a side plane of the test piece 9 .

[0075] Therefore, the side of the test piece prepared by using the test mold has a flat surface with a width of 10 mm, which is convenient for bonding with the metal sheet 10.

[0076] According to an embodiment of the present invention, an application method of a hydraulic asphalt concrete slope flow value test device is provided. The hydraulic asphalt concrete slope flow value test device is used and the specific use is implemented according to the following steps:

[0077] Step 1, specimen molding:

[0078] Step 1.1, preparing asphalt concrete raw materials and preparing asphalt mixture according to different mix ratio parameters;

[0079] Step 1.2, laboratory molding specimen 9:

[0080] The specific process of laboratory molding specimen 9 is as follows:

[0081] Install the test mold screw lock buckle 13 on the test mold, put it in an oven and heat it to 100-110°C in advance, and apply a release agent inside the test mold before loading the asphalt mixture;

[0082] Prepare asphalt mixture according to the selected mix ratio, pour it into the test mold, tamp the asphalt mixture with a tamping rod until it is flat, and compact it manually or with a Marshall compactor, compacting it 20 or 35 times on both sides. The compaction times are based on the density of the specimen 9 reaching ±1% of the Marshall standard compaction specimen density, and the height dimension deviation is ±1mm;

[0083] Step 2, demoulding and polishing of the specimen:

[0084] After the compacted specimen 9 is completely cooled, demoulding is performed; then, the plane area on the side of the specimen 9 for bonding the metal sheet 10 is polished, slightly exposing the aggregate, and at the same time, the upper and lower ends of the specimen 9 are polished to be flat, and numbered;

[0085] Step 3, adjust the slope of the ramp flow device:

[0086] The angle adjustment device 8 is used to adjust the slope gradient of the slope flow plate 1 to the design specified gradient; if there is no design, the slope gradient can be 1:1.75.

[0087] Step 4, measuring the size and porosity of the specimen 9:

[0088] Measure the size and porosity of the test piece 9. If they do not meet the standards, return to step 2 and reprocess. After the size and porosity of the test piece 9 meet the standards, execute step 5.

[0089] Step 5, install the test piece 9, connect the wires in series and debug the connection effect between the displacement meter 4 and the metal sheet 10:

[0090] The prepared metal sheet 10 is bonded to the plane area of ​​the test piece 9 at a distance of 50 mm from the bottom by high-performance AB glue, and a third wire 11 is connected to the metal sheet 10; after the test piece 9 and the metal sheet 10 are firmly bonded, the test piece 9 is bonded to the test piece base 2 until the test piece 9 and the test piece base 2 are firmly bonded;

[0091] The wires led out of each displacement meter 4 are connected in series through the first wire 3 and then connected to one end of the multimeter 5; after the test piece 9 is mounted on the test piece base 2, the third wires 11 led out of the metal sheet 10 of each test piece 9 are connected in series and connected in series with one end of a second wire 6, and the other end of the second wire 6 is connected to the other end of the multimeter 5;

[0092] Turn on the multimeter 5, rotate a displacement meter 4 until the multimeter 5 makes a buzzing sound, then stop rotating and rotate the displacement meter 4 in the opposite direction to disconnect the displacement meter 4 from the metal sheet 10; check all displacement meters 4 in turn according to the above steps; if the displacement meter 4 still does not make a buzzing sound after being connected to the metal sheet 10, check whether the metal sheet 10 and the third wire 11, the displacement meter 4 and the first wire 3 are in poor contact, and re-bond them;

[0093] Step 6, start the test and measure the displacement meter readings at different test times:

[0094] Adjust the oven temperature to the test temperature, for example, 70°C as required by the specification, and wait for the oven to stabilize to the test temperature;

[0095] Before placing the ramp flow device into the oven, adjust the displacement meter 4 and read the initial reading of the displacement meter 4 corresponding to each test piece 9, which is recorded as Ui0 , represents the initial reading of the i-th specimen;

[0096] When the oven stabilizes to the test temperature, place the ramp flow device in the oven; after the test starts, take the ramp flow device out of the oven and read the readings at 1h, 2h, 4h, 6h, 8h, 12h, 24h, 36h, and 48h. The readings corresponding to each time are recorded as U i1 , U i2 , U i4 , U i6 , U i8 , U i12 , U i24 , U i36 , U i48 ;

[0097] Step 7: After 48 hours of testing, the slope flow value of each specimen at different times is calculated and the slope flow value-time curve is plotted to further determine whether the deformation of the asphalt concrete specimen has a convergence trend.

[0098] Specifically, the following formula is used to calculate the slope flow value of each specimen at each time j, accurate to 0.01 mm:

[0099] U” ij =U i0 -U ij

[0100] in:

[0101] U” ij represents the slope flow value of the i-th specimen at the j-th test time, mm;

[0102] U ij Represents the displacement meter reading of the i-th specimen at the j-th test time, mm;

[0103] U i0 Represents the initial reading of the ith specimen, mm.

[0104] The invention provides a hydraulic asphalt concrete slope flow value test device and an application method thereof, which have the following characteristics:

[0105] (1) The present invention installs a stabilizer on the asphalt concrete slope flow value test device, so that the slope flow device can be more stable during the measurement process, thereby greatly improving the test accuracy.

[0106] Specifically, during the slope flow value test, the slope flow device needs to be taken out of the oven to read the values ​​and measure the slope flow values ​​of the specimens at different times. Therefore, by installing a stabilizer, the shaking of the test device can be reduced during the taking and placing process, thereby improving the accuracy of the test results.

[0107] (2) The test specimens prepared by the test mold provided by the present invention minimize the problems of metal sheet falling off and weak bonding during the bonding and testing process of the asphalt concrete specimens;

[0108] Specifically, according to the characteristics of asphalt concrete materials and slope flow value tests, if the specimen used in the slope flow test is a Marshall specimen (a cylinder with a size of φ101.6±0.2mm and h 63.5±1.3mm), and the preparation method is laboratory molding (Marshall compaction molding) or on-site core sampling and then cutting, then before the slope flow test, it is necessary to bond the metal sheet to the test piece and lead out the wire. Asphalt concrete is a non-uniform phase change material with temperature sensitivity. Under the temperature environment of 70°C in the slope flow test, the softening of asphalt will cause the bonding strength between the metal sheet and the specimen to decrease, affecting the test accuracy. In addition, the Marshall specimen is a cylinder with a curved side, while the metal iron sheet is a flat surface, making it difficult to bond the specimen to the metal sheet.

[0109] The test piece prepared by the test mold provided by the present invention is formed with a flat surface, which ensures the stable bonding between the test piece and the metal sheet. The problem of the metal sheet falling off and the weak bonding of the asphalt concrete test piece during the bonding and testing process is reduced to the greatest extent;

[0110] (3) In the present invention, the wires of each test piece and the displacement meter are connected in series to measure the slope flow value of the test piece, thereby avoiding the need to reconnect the multimeter every time a data is measured, greatly shortening the reading time and improving the test accuracy;

[0111] Specifically, if the multimeter is connected to the wire and the displacement meter once each time a test piece is measured, that is, each test piece can only be tested independently, the measurement time during the test is long, and the wire is easily pulled, resulting in a decrease in the bonding strength between the metal iron sheet and the test piece, thereby affecting the test accuracy.

[0112] In the present invention, slope flow value tests can be carried out on multiple test pieces at the same time, thereby improving test accuracy and test efficiency.

[0113] (4) The present invention is a hydraulic asphalt concrete slope flow value test device and its application method, which provides multiple test times for measuring the test piece during the slope flow value test, can better understand the deformation of the asphalt concrete test piece at different test times, can well reflect the change trend of its slope flow value, and draw a slope flow value-time curve.

[0114] In general, the hydraulic asphalt concrete slope flow value test device and its application method provided by the present invention provide a basis for test personnel to determine the high temperature stability of asphalt concrete, which not only improves the test accuracy but also reduces the test difficulty. It can also reflect the change trend of the slope flow value of the asphalt concrete specimen.

[0115] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A hydraulic asphalt concrete slope flow value test device, characterized in that: It comprises a slope flow plate (1), a test piece base (2), a first wire (3), a displacement meter (4), a multimeter (5), a second wire (6), a stabilizer (7), an angle adjustment device (8), a test piece (9), a metal sheet (10) and a third wire (11); A plurality of the specimen bases (2) are arranged on the surface of the slope flow plate (1), and a specimen (9) is placed on each of the specimen bases (2); the metal sheet (10) is bonded to the side surface of each of the specimens (9); and each of the metal sheets (10) is connected to a third wire (11); A displacement meter (4) is installed on the surface of the slope flow plate (1) at one side of each test piece base (2), and a sensor probe of the displacement meter (4) is in contact with the metal sheet (10) corresponding to one of the test pieces (9); After the displacement meters (4) are connected in series via the first wire (3), one end of the first wire (3) is connected to one end of the multimeter (5); The third wires (11) connected to the metal sheets (10) of the test pieces (9) are connected in series and fixed together, and are connected in series with one end of a second wire (6), and the other end of the second wire (6) is connected to the other end of the multimeter (5); The angle adjustment device (8) is arranged below the slope flow plate (1); and the stabilizer (7) is arranged below the angle adjustment device (8).

2. A hydraulic asphalt concrete slope flow value test device according to claim 1, characterized in that: The slope flow plate (1) is an iron plate, and the slope flow plate (1) is provided with a slot for placing the test piece base (2).

3. A hydraulic asphalt concrete slope flow value test device according to claim 1, characterized in that: The number of the specimen bases (2) and the number of the displacement meters (4) provided are both 6.

4. A hydraulic asphalt concrete slope flow value test device according to claim 1, characterized in that: The angle adjustment device (8) is supported by an arc-shaped support plate, and a curved groove is left in the middle of the arc-shaped support plate. The slope of the slope flow plate (1) is adjusted by loosening or tightening a movable bolt.

5. A hydraulic asphalt concrete slope flow value test device according to claim 1, characterized in that: Also included is a test mold for preparing the test piece (9); The test piece (9) prepared by the test mold forms a plane for bonding the metal sheet (10) on the side of the test piece (9).

6. A hydraulic asphalt concrete slope flow value test device according to claim 5, characterized in that: The test mold comprises a test mold wall (12), a test mold screw lock (13) and a metal shaft (14); The test mold wall (12) comprises two semicircular test mold walls that are symmetrically buckled together; after the two semicircular test mold walls are buckled together, one end is connected by the metal shaft (14), so that the two semicircular test mold walls can be rotated around the metal shaft (14) to open or buckle; the other ends of the two semicircular test mold walls are connected and fixed by the test mold screw lock buckle (13); A plane is provided on one side of the interior of the test mold wall (12) for forming a side plane of the test piece (9).

7. A slope flow value test method of a hydraulic asphalt concrete slope flow value test device according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1, specimen molding: Step 1.1, preparing asphalt concrete raw materials and preparing asphalt mixture according to different mix ratio parameters; Step 1.2, laboratory molding test piece (9): Install the test mold screw lock buckle (13) on the test mold, put it in an oven to heat it to 100-110°C in advance, and apply a mold release agent inside the test mold before loading the asphalt mixture; Prepare an asphalt mixture according to the selected mix ratio, pour it into a test mold, use a tamping rod to tamp the asphalt mixture until it is smooth, and use manual compaction or Marshall compaction instrument compaction to compact the front and back sides 20 or 35 times, the compaction times are based on the density of the test piece (9) reaching ±1% of the Marshall standard compaction test piece density, and the height dimension deviation is ±1mm; Step 2, demoulding and polishing of the specimen: After the compacted specimen (9) is completely cooled, demoulding is performed; then, the plane area on the side of the specimen (9) for bonding the metal sheet (10) is polished to expose the aggregate, and at the same time, the upper and lower ends of the specimen (9) are polished to be flat and numbered; Step 3, adjust the slope of the ramp flow device: Using an angle adjustment device (8) to adjust the slope gradient of the slope flow plate (1) to a slope specified in the design; Step 4, measuring the size and porosity of the test piece (9): Measure the size and porosity of the test piece (9). If the size and porosity do not meet the standard, return to step 2 and reprocess. After the size and porosity of the test piece (9) meet the standard, execute step 5. Step 5, install the test piece (9), connect the wires in series and debug the connection effect between the displacement meter (4) and the metal sheet (10): The metal sheet (10) is bonded to a plane area of ​​the test piece (9) 50 mm from the bottom thereof by using high-performance AB glue, and a third wire (11) is connected to the metal sheet (10); after the test piece (9) and the metal sheet (10) are firmly bonded, the test piece (9) is bonded to the test piece base (2) until the test piece (9) and the test piece base (2) are firmly bonded; The wires led out of each displacement meter (4) are connected in series through a first wire (3) and then connected to one end of a multimeter (5); after the test piece (9) is mounted on a test piece base (2), the third wires (11) led out of the metal sheet (10) of each test piece (9) are connected in series and connected in series with one end of a second wire (6); the other end of the second wire (6) is connected to the other end of the multimeter (5); Turn on the multimeter (5), rotate a displacement meter (4) until the multimeter (5) emits a buzzing sound, stop rotating and rotate the displacement meter (4) in the opposite direction to disconnect the displacement meter (4) from the metal sheet (10); check all displacement meters (4) in turn according to the above steps; if the displacement meter (4) still does not emit a buzzing sound after being connected to the metal sheet (10), check whether the metal sheet (10) and the third wire (11), and the displacement meter (4) and the first wire (3) are in poor contact, and re-bond them; Step 6, start the test and measure the displacement meter readings at different test times: Adjust the oven temperature to the test temperature and wait until the oven stabilizes to the test temperature; Before placing the ramp flow device into the oven, adjust the displacement meter (4) and read the initial reading of the displacement meter (4) corresponding to each test piece (9), which is recorded as U i0 , represents the initial reading of the i-th specimen; When the oven stabilizes to the test temperature, place the ramp flow device in the oven; after the test starts, take the ramp flow device out of the oven and read the readings at 1h, 2h, 4h, 6h, 8h, 12h, 24h, 36h, and 48h. The readings corresponding to each time are recorded as U i1 , U i2 , U i4 , U i6 , U i8 , U i12 , U i24 , U i36 , U i48 ; Step 7: After 48 hours of testing, the slope flow value of each specimen at different times is calculated and the slope flow value-time curve is plotted to further determine whether the deformation of the asphalt concrete specimen has a convergence trend.

8. The slope flow value test method of the hydraulic asphalt concrete slope flow value test device according to claim 7 is characterized in that: In step 7, the slope flow value at each time j is calculated using the following formula: IN" ij =U i0 -IN ij in: U” ij represents the slope flow value of the i-th specimen at the j-th test time; U ij Represents the displacement meter reading of the i-th specimen at the j-th test time; U i0 Represents the initial reading of the i-th specimen.

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