CN211348241U - Asphalt mixture anti-rutting capability test device - Google Patents
Asphalt mixture anti-rutting capability test device Download PDFInfo
- Publication number
- CN211348241U CN211348241U CN201922240414.2U CN201922240414U CN211348241U CN 211348241 U CN211348241 U CN 211348241U CN 201922240414 U CN201922240414 U CN 201922240414U CN 211348241 U CN211348241 U CN 211348241U
- Authority
- CN
- China
- Prior art keywords
- control unit
- loading
- test
- annular
- test bed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses an asphalt mixture anti-rutting capability test device, which comprises a thermostat, a loading frame, a loading mechanism, a test rubber wheel, an annular test bed and a master control unit; the loading frame is fixedly arranged in the thermostat, the annular test bed is connected with the loading frame, the loading mechanism is arranged on an inner ring of the annular test bed and comprises a loading support, a plurality of cylinders are arranged on the loading support, the test rubber wheels are rotationally connected with the movable ends of the cylinders, the annular test bed surrounds the test rubber wheels, and an arc-shaped track plate is arranged on the inner ring of the annular test bed; the annular test bed is connected with a rotation driving mechanism, an electromagnetic counter is arranged on a loading frame, a laser displacement sensor is arranged on an air cylinder, the laser displacement sensor and the electromagnetic counter are both connected with a master control unit, the device can truly simulate the action of a traveling load on an asphalt pavement, the continuous and adjustable loading process, the continuous and adjustable loading speed and loading pressure are realized, the test efficiency is improved, and a plurality of loading wheels can load a plurality of test pieces simultaneously.
Description
Technical Field
The utility model belongs to road bituminous mixture test field, concretely relates to anti rutting ability test device of bituminous mixture.
Background
The anti-rutting capability is an important index for evaluating the service performance of the asphalt pavement. At present, a linear rut meter is a main device for testing the high-temperature rut resistance of an asphalt mixture indoors. The main principle is that under the control of test temperature and wheel pressure, a loading wheel carries out reciprocating rolling (42 times per minute) on asphalt mixture plates (the length of a test piece is 300mm, the width is 300mm, and the height is 50mm) and the rut deformation of the test piece is measured after certain rolling times, so that the dynamic stability is calculated. However, the following problems are mainly encountered in this type of apparatus: the loading process is discontinuous, and the back-and-forth rolling of the loading wheel does not accord with the actual driving environment; the loading speed is not adjustable, and the real rolling of high-speed vehicles cannot be simulated; the test efficiency is low, only can test a plate and only has a loading wheel once.
In addition to the conventional rut testing apparatus, some researchers have also begun to study indoor accelerated loading devices to test the rut resistance and wear resistance of asphalt mixtures. At present, most indoor continuous accelerated loading rut test devices adopt a planar annular arrangement form, such as an authorized Chinese utility model patent with the publication number of CN101666727A, namely an indoor small-size annular asphalt pavement structure rut test device. The test method is mainly characterized in that the asphalt mixture to be tested is made into a planar annular test piece, and the loading wheel makes continuous planar circular motion around the center of the loading wheel on the surface of the loading wheel. Which remedies some of the drawbacks of the conventional devices, but still has the following problems: (1) the stress of the test piece is not consistent with the actual driving load, and the test piece is influenced by transverse shearing force besides the vertical pressure of the loading wheel, so that the rutting test result is influenced by multiple factors; (2) the loading pressure can not be flexibly adjusted, and the counterweight is used as a load and can not be continuously adjusted; (3) a special compaction device is needed for preparing the test piece, and the test piece can not be formed by the existing equipment; (4) the device is limited by a planar annular arrangement form, the occupied area of the device is large, and the utilization rate of a longitudinal space is low.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the prior art, the utility model provides an anti rutting ability test device of bituminous mixture, the device can truly simulate the effect of driving load to bituminous paving, help realizing that loading process is continuous, loading speed and loading pressure are adjustable in succession, and test efficiency is showing and is improving, and a plurality of loading wheels of single can load a plurality of test pieces simultaneously, can provide data for the anti rutting ability of aassessment bituminous paving.
In order to achieve the purpose, the utility model adopts the technical scheme that the anti-rutting capability test device for the asphalt mixture comprises a thermostat, a loading frame, a loading mechanism, a test rubber wheel, an annular test bed and a master control unit; the loading frame is fixedly arranged in the thermostat, the annular test bed is connected with the loading frame, the loading mechanism is arranged on an inner ring of the annular test bed and comprises a loading support, a plurality of cylinders are arranged on the loading support, the test rubber wheels are rotationally connected with the movable ends of the cylinders, the annular test bed surrounds the test rubber wheels, an arc-shaped track plate is arranged on the inner ring of the annular test bed, and the loading support is arranged at the center of the annular test bed; the annular test bed is connected with a rotation driving mechanism, an electromagnetic counter used for monitoring the number of turns of the annular test bed is arranged on the loading frame, a laser displacement sensor is arranged on the air cylinder, and the laser displacement sensor and the electromagnetic counter are connected with a signal input end of the master control unit.
The input end of the air cylinder is connected with the air pump, and the control signal input end of the air pump is connected with the output end of the air pressure control unit; the air pressure control unit is connected with the main control unit through an I/O interface.
Four air cylinders uniformly distributed along the circumferential direction are arranged on the loading support, and a reinforcing rod is arranged between every two adjacent air cylinders.
The movable end of the cylinder is provided with a wheel carrier, and the test rubber wheel is rotationally connected with the wheel carrier.
The outer lane of annular test platform is the gear form to the outer lane of annular test platform is provided with rather than the drive gear of meshing, and drive gear sets up on the motor support, driving motor's output with drive gear's gear shaft passes through the belt and connects, and driving motor's control signal input connects motor speed control unit, and motor speed control unit passes through IO interface connection with total control unit.
The thermostat is internally provided with a heater and a temperature control unit, the heater is connected with the output end of the temperature control unit, the middle part of the loading support is provided with an infrared temperature sensor, the infrared temperature sensor is connected with the input end of the temperature control unit, and the temperature control unit is connected with the master control unit through an I/O interface.
The annular test bed comprises a plurality of arc-shaped baffle plates, a partition plate and arc-shaped baffle plates, the arc-shaped baffle plates are arranged along the circumferential direction of the annular test bed, the partition plate is evenly arranged along the inner ring of the annular test bed, the partition plate and the arc-shaped baffle plates form a plurality of rut plate test piece grooves, the arc-shaped rut plates are arranged in the rut plate test piece grooves, and two adjacent arc-shaped baffle plates are connected and locked by a locker.
The side of the thermostat is provided with a thermostat door, an observation window is arranged on the thermostat door, a control panel and a display panel are further arranged on the thermostat door, the control panel is connected with an I/O interface of the master control unit, and the display panel is connected with an output end of the master control unit.
Compared with the prior art, the utility model discloses following beneficial effect has at least:
the utility model can truly simulate the whole process of the asphalt pavement generating ruts under the load of the traveling crane, compared with the prior art, the annular rotary loading test can simulate the linear, equidirectional and continuous rolling process of the wheels; the multiple loading wheel pressures can respectively adjust the contact pressure with the asphalt test piece so as to simulate the damage to the asphalt pavement under different load compositions; the loading speed can be adjusted to simulate the action of wheel load on asphalt pavements in different highway driving speed environments such as expressways, urban roads and toll stations; the test efficiency is high, a plurality of loading wheels work simultaneously, a plurality of groups of test pieces can be tested at one time, and the comparison work of large test quantity can be carried out; compact structure, area is little, and the vertical space of make full use of is fit for indoor laboratory and arranges and install.
Furthermore, the air pump provides power for the air cylinder, the air pump is connected with the air pressure control unit, the air pressure control unit is connected with the master control unit, the output pressure of the air cylinder can be controlled automatically and accurately in a centralized mode, and therefore the accuracy and the wide applicability of the test are improved.
Furthermore, the movable end of the cylinder is provided with a wheel carrier, and the test rubber wheel is rotationally connected with the wheel carrier, so that the action process of a real wheel and the road surface can be simulated more approximately.
Furthermore, the outer ring of the annular test bed is in a gear shape, the outer ring of the annular test bed is provided with a driving gear meshed with the outer ring, the control signal input end of the driving motor is connected with the motor rotating speed control unit, the motor rotating speed control unit is connected with the master control unit through an I/O (input/output) interface, the annular test bed is driven at the outer ring without too large torque, the test is easier to carry out, the loading process is not influenced, and the arrangement structure is more compact; the rotating speed of the annular test bed can also be controlled centrally and automatically.
Furthermore, a heater and a temperature control unit are arranged in the thermostat, so that the thermostat is heated and kept at a constant temperature more conveniently, and the temperature is controlled more conveniently.
Furthermore, fix the rut board test piece in rut board test piece groove, use more standard rut board test piece, raise the efficiency and the accuracy, improve experimental standardization, make things convenient for the test piece moreover and install.
Furthermore, a thermostat door is arranged on the side surface of the thermostat, an observation window is arranged on the thermostat door, a control panel and a display panel are also arranged on the thermostat door, the control panel is connected with an I/O interface of the master control unit, and the display panel is connected with the output end of the master control unit; just can close the constant temperature chamber door after the installation is accomplished rut board test piece, operate and control this testing arrangement on display panel, the testing process is also safer, enables its inside loading test process visual through the observation window moreover.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the middle ring-shaped test bed of the present invention.
Fig. 3 is a schematic structural view of the middle rut plate forming mold of the present invention.
Wherein, 1 is a constant temperature box, 2 is a loading frame, 3 is a loading support, 4 is a cylinder, 5 is a reinforcing rod, 6 is a wheel carrier, 7 is a testing rubber wheel, 8 is a gas distribution pipe, 9 is a gas pipe protective cover, 10 is an infrared temperature sensor, 11 is a laser displacement sensor, 12 is a bearing, 13 is a connecting arm, 14 is an annular test bed, 15 is a gear, 16 is a rut plate test piece groove, 17 is a partition plate, 18 is a baffle plate, 19 is a locker, 20 is a motor support, 21 is a driving motor, 22 is a belt, 23 is a driving gear, 24 is an electromagnetic counter, 25 is a heater, 26 is a temperature control unit, 27 is an air pump, 28 is an air pressure control unit, 29 is a motor rotation speed control unit, 30 is a power supply manager, 31 is a master control unit, 32 is a communication bus, 33 is a constant temperature box door, 34 is an observation window, 35 is a control panel, 36 is a display panel, 37 is a rut plate forming mold, 38 is a bracket and 39 is a graduated scale.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
in order to achieve the purpose, the utility model adopts the technical scheme that the anti-rutting capability test device for the asphalt mixture comprises a constant temperature box 1, a loading frame 2, a loading mechanism, a test rubber wheel 7, an annular test bed 14 and a master control unit; the loading frame 2 is fixedly arranged in the constant temperature box 1, the annular test bed 14 is connected with the loading frame 2, the loading mechanism is arranged at the inner ring of the annular test bed 14 and comprises a loading support 3, a plurality of cylinders 4 are arranged on the loading support 3, the test rubber wheel 7 is rotatably connected with the movable end of each cylinder 4, the annular test bed 14 surrounds the test rubber wheel 7, an arc-shaped track plate is arranged at the inner ring of the annular test bed 14, and the loading support 3 is arranged at the center of the annular test bed 14; the annular test bed 14 is connected with a rotation driving mechanism, an electromagnetic counter 24 used for monitoring the number of turns of the annular test bed 14 is arranged on the loading frame 2, a laser displacement sensor 11 is arranged on the air cylinder 4, and the laser displacement sensor 11 and the electromagnetic counter 24 are both connected with a signal input end of a master control unit 31.
The input end of the air cylinder 4 is connected with an air pump, and the control signal input end of the air pump is connected with the output end of the air pressure control unit; the air pressure control unit is connected with the master control unit through an I/O interface, four air cylinders 4 which are uniformly distributed along the circumferential direction are arranged on the loading support 3, and reinforcing rods 5 are arranged between the adjacent air cylinders 4.
The movable end of the cylinder 4 is provided with a wheel carrier 6, and the test rubber wheel 7 is rotationally connected with the wheel carrier 6.
The outer ring of the annular test bed 14 is in a gear shape, the outer ring of the annular test bed 14 is provided with a driving gear 23 meshed with the outer ring, the driving gear 23 is arranged on the motor support 20, the output end of the driving motor 21 is connected with the gear shaft of the driving gear 23 through a belt 22, the control signal input end of the driving motor 21 is connected with a motor rotating speed control unit 29, and the motor rotating speed control unit 29 is connected with a main control unit 31 through an I/O interface.
A heater 25 and a temperature control unit are arranged in the incubator 1, the heater 25 is connected with the output end of the temperature control unit 26, an infrared temperature sensor 10 is arranged in the middle of the loading support 3, the infrared temperature sensor 10 is connected with the input end of the temperature control unit 26, and the temperature control unit 26 is connected with the general control unit 31 through an I/O interface
The side of the thermostat 1 is provided with a thermostat door 33, the thermostat door 33 is provided with an observation window 34, the thermostat door 33 is further provided with a control panel 35 and a display panel 36, the control panel 35 is connected with an I/O interface of the master control unit, and the display panel 36 is connected with an output end of the master control unit 31.
The utility model provides a be based on bituminous mixture anti rutting ability test device's application method, including following step:
step 1, fixing a rut plate test piece on the inner side of an annular test platform 14, setting a load combination L, setting contact pressure between a test rubber wheel 7 and the rut plate test piece by respectively adjusting the loading pressure of an air cylinder 4, setting a test environment temperature T, heating the interior of a constant temperature box to heat the interior of the constant temperature box 1, and driving the annular test platform 14 to start a loading process after the temperature reaches a set temperature by a driving mechanism;
step 2, the electromagnetic counter 24 records the rotation times of the annular test platform 14 in real time, the grinding speed of the test piece is set to be V, and the accumulated rotation times n and the absolute deformation D of each rut plate test piece are obtainedn,iI is 1 … 8, and the test is stopped when the load is applied for N times; and obtaining data for evaluating the anti-rutting capability of the asphalt test piece.
Example 1
Referring to fig. 1, the utility model provides a pair of bituminous mixture anti rutting ability test device, include thermostated container 1, fix the loading frame 2 on the thermostated container. The heater 25 and the motor support 20 are installed at the bottom of the incubator 1. The heater 25 is heated by the oven 1 and is controlled by a temperature control unit 26. The motor support 20 is provided with a driving motor 21, the driving motor 21 drives a driving gear 23 through a belt 22, and the driving motor is controlled by a motor speed control unit 29. The loading frame 2 is of an X-shaped structure, a loading support 3 is fixed at the tail end of a central shaft of the loading frame, a bearing 12 is nested in the central shaft, and an electromagnetic counter 24 is installed on the loading frame 2. And air cylinders 4 are fixed around the loading support 3, and an infrared temperature sensor 10 and a laser displacement sensor 11 are fixed between the air cylinders 4. The air cylinders 4 are connected with each other through the reinforcing rods 5 to improve rigidity, the test rubber wheels 7 are fixed at the bottoms of the air cylinders 4 through the wheel frames 6, the air pump 27 is connected with the air distribution pipes 8 through the air pressure control unit to supply air to the air cylinders 4, and pressure of each air cylinder 4 can be independently adjusted. The bearing 12 is connected with an annular test bed 14 through a connecting arm 13, and a gear 15 is annularly arranged outside the annular test bed 14. The gear 15 is engaged with the driving gear 23 to rotate the annular test stand 14. The electromagnetic counter 24 is induced by the magnetic block on the back of the connecting arm 13, and when the annular test bed 14 and the connecting arm 13 rotate, counting can be carried out. The total control unit 31 manages the temperature control unit 26, the air pressure control unit 28, the motor rotation speed control unit 29, and the power manager 30 through a communication bus 32, and it can be connected to an external computer. The power manager 30 supplies power to all appliances.
Referring to fig. 2, the annular test bed 14 is connected with the bearing 12 through the connecting arm 13, and the inside of the annular test bed 14 is divided into a plurality of rut plate test piece grooves 16 by a partition 17. The rut plate test piece groove 16 can be used for placing an arc rut plate, and the baffle 18 is fixed by screwing the locker 19, so that the rut plate in the rut plate test piece groove 16 is fixed.
Referring to fig. 3, an arc-shaped rut plate is formed using a rut plate forming die 37. The lower part of the track plate forming die is provided with a support 38, a graduated scale 39 is arranged in the track plate forming die to measure the thickness of a test piece, and the arc-shaped track plate is formed by a wheel-milling forming machine according to the T0703-2011 specification.
Testing by using an asphalt mixture anti-rutting capability testing device to obtain an actually measured deformation point of a rut plate test piece, and drawing a scatter diagram; fitting by adopting an S-shaped function through actually measured deformation points, and drawing to obtain a deformation curve Fi,T,V,L(n)＝a0/(exp(a1·(a2-n)) + 1). Calculating the equivalent deformation eD of 500 cumulative loads500：
Calculating the equivalent deformation eD after loading the N/2 th time by the above method for calculating the equivalent deformationN/2And the equivalent deformation eD loaded to the Nth timeNCalculating the equivalent deformation rate eDS between N/2 times and N times of loadingN/2：
Example 2
And (3) forming the rut plates by adopting a wheel-milling forming machine based on the rut plate forming die 37, fixing 8 rut plates in the corresponding rut plate test piece grooves 16 respectively, and screwing the locking device 19. Setting the pressure of two air cylinders 4 to make the contact pressure of two test rubber wheels 7 be 0.7MPa, and setting the other two air cylinders4, the contact pressure of the other two test rubber wheels 7 is 1.1MPa, and a heavy load combination L is formed2。
And (3) closing the thermostat door 33, starting heating by the heater 25 under the control of the temperature control unit 26, starting the driving motor 21 to drive the driving gear 23 through the belt 22 when the infrared temperature sensor 10 detects that the surface temperature T of the track plate test piece is stabilized at 60 ℃, and driving the annular test bed 14 to rotate. The electromagnetic counter 24 feeds back the rotating speed data in real time, and the rotating speed of the driving motor 21 is controlled by the motor rotating speed control unit 29, so that the rolling speed V of each test piece is 42 times per minute, namely, the annular test bed 14 rotates 10.5 circles/min. Meanwhile, the laser displacement sensor 11 records the deformation of the track plates in the 8 track plate test piece grooves 16 in real time. When the rolling times N of each track plate reach 2520 times, stopping the test; and obtaining data required for evaluating the high-temperature anti-rutting performance of the asphalt mixture.
Claims (8)
1. The device for testing the rutting resistance of the asphalt mixture is characterized by comprising a constant temperature box (1), a loading frame (2), a loading mechanism, a testing rubber wheel (7), an annular test bed (14) and a master control unit; the loading frame (2) is fixedly arranged in the constant temperature box (1), the annular test bed (14) is connected with the loading frame (2), the loading mechanism is arranged at the inner ring of the annular test bed (14), the loading mechanism comprises a loading support (3), a plurality of air cylinders (4) are arranged on the loading support (3), the test rubber wheel (7) is rotatably connected with the movable end of the air cylinder (4), the annular test bed (14) surrounds the test rubber wheel (7), the inner ring of the annular test bed (14) is provided with an arc-shaped track plate, and the loading support (3) is arranged at the center of the annular test bed (14); the annular test bed (14) is connected with a rotation driving mechanism, an electromagnetic counter (24) used for monitoring the number of turns of the annular test bed (14) is arranged on the loading frame (2), a laser displacement sensor (11) is arranged on the air cylinder (4), and the laser displacement sensor (11) and the electromagnetic counter (24) are both connected with a signal input end of a master control unit (31).
2. The asphalt mixture rutting resistance test device according to claim 1, wherein the input end of the air cylinder (4) is connected with an air pump (27), and the control signal input end of the air pump (27) is connected with the output end of the air pressure control unit (28); the air pressure control unit (28) is connected with the master control unit (31) through an I/O interface.
3. The asphalt mixture rutting resistance test device according to claim 2, wherein the loading support (3) is provided with four cylinders (4) uniformly distributed along the circumferential direction, and a reinforcing rod (5) is arranged between adjacent cylinders (4).
4. The asphalt mixture rutting resistance test device according to claim 1, wherein the movable end of the cylinder (4) is provided with a wheel carrier (6), and the test rubber wheel (7) is rotatably connected with the wheel carrier (6).
5. The asphalt mixture rutting resistance test device according to claim 1, wherein the outer ring of the annular test bed (14) is in a gear shape, the outer ring of the annular test bed (14) is provided with a driving gear (23) meshed with the outer ring, the driving gear (23) is arranged on the motor support (20), the output end of the driving motor (21) is connected with the gear shaft of the driving gear (23) through a belt (22), the control signal input end of the driving motor (21) is connected with a motor rotating speed control unit (29), and the motor rotating speed control unit (29) is connected with the main control unit (31) through an I/O interface.
6. The asphalt mixture rutting resistance test device according to claim 1, wherein a heater (25) and a temperature control unit are arranged in the thermostat (1), the heater (25) is connected with the output end of the temperature control unit (26), an infrared temperature sensor (10) is arranged in the middle of the loading support (3), the infrared temperature sensor (10) is connected with the input end of the temperature control unit (26), and the temperature control unit (26) is connected with the master control unit (31) through an I/O interface.
7. The asphalt mixture anti-rutting capability test device according to claim 1, wherein the annular test bed (14) comprises a plurality of arc-shaped baffles (18), a partition plate (17), the arc-shaped baffles (18) are arranged along the circumferential direction of the annular test bed (14), the partition plate (17) is uniformly arranged along the inner ring of the annular test bed, the partition plate (17) and the arc-shaped baffles (18) form a plurality of rutting plate test piece grooves (16), the arc-shaped rutting plates are arranged in the rutting plate test piece grooves (16), and two adjacent arc-shaped baffles (18) are connected and locked by a locker (19).
8. The asphalt mixture rutting resistance test device according to claim 1, wherein a thermostat door (33) is arranged on a side surface of the thermostat (1), an observation window (34) is arranged on the thermostat door (33), a control panel (35) and a display panel (36) are further arranged on the thermostat door (33), the control panel (35) is connected with an I/O interface of the master control unit, and the display panel (36) is connected with an output end of the master control unit (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922240414.2U CN211348241U (en) | 2019-12-14 | 2019-12-14 | Asphalt mixture anti-rutting capability test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922240414.2U CN211348241U (en) | 2019-12-14 | 2019-12-14 | Asphalt mixture anti-rutting capability test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211348241U true CN211348241U (en) | 2020-08-25 |
Family
ID=72096359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922240414.2U Expired - Fee Related CN211348241U (en) | 2019-12-14 | 2019-12-14 | Asphalt mixture anti-rutting capability test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211348241U (en) |
-
2019
- 2019-12-14 CN CN201922240414.2U patent/CN211348241U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109374454B (en) | Multifunctional pavement paving material performance test device and test method | |
| CN203595634U (en) | Multifunctional asphalt pavement durability tester | |
| CN100543444C (en) | Indoor rotary wheel rutting test machine for asphalt mixture | |
| CN201569616U (en) | Novel rut tester for bituminous mixture | |
| CN101532934A (en) | Method for testing accelerating and loading of main drive wheel type pavement materials and device | |
| CN104034866A (en) | Method for evaluating performance of cool-mixed and cool-spread modified emulsified asphalt mixture | |
| CN204988883U (en) | Bituminous mixture wheel tracking test device | |
| CN107219131B (en) | A kind of asphalt horizontal shear performance test apparatus and method considering local axial compressive force | |
| CN103698223A (en) | Pavement coupling temperature test device under coupling of load and temperature, and test method | |
| JPWO2019203359A1 (en) | Tire test equipment | |
| CN206410987U (en) | A kind of accelerated loading road surface comprehensive test system | |
| AU2020412458B2 (en) | Retrofit intelligent compaction analyzer | |
| CN104792548A (en) | Three-drum detection device used for simulating straight pavements with different attachment coefficients | |
| CN211348241U (en) | Asphalt mixture anti-rutting capability test device | |
| CN110954685A (en) | Continuous indoor rut test device and asphalt anti-rut capability evaluation method | |
| CN206362651U (en) | A kind of asphalt strain test instrument | |
| CN208013123U (en) | A kind of heat run device of bituminous paving sample | |
| CN206960269U (en) | One kind is used to determine domatic asphalt strain test instrument | |
| CN114061986A (en) | Rubber abrasion testing method | |
| CN206132536U (en) | Acceleration abrasion test device on road surface top layer | |
| CN205049418U (en) | Portable test device of research bituminous mixture fatigue characteristic | |
| CN206157543U (en) | Rotatable road surface regeneration vehicle auto seeking plane device | |
| CN207717552U (en) | A kind of Multifunctional asphalt pavement track experiment instrument | |
| CN216144662U (en) | Multifunctional roadbed soil body compaction test system | |
| CN113092344A (en) | Multifunctional roadbed soil body compaction test system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200825 Termination date: 20211214 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |