CN205562314U - But indoor simulation fatigue test device of form bituminous mixture - Google Patents
But indoor simulation fatigue test device of form bituminous mixture Download PDFInfo
- Publication number
- CN205562314U CN205562314U CN201620354417.2U CN201620354417U CN205562314U CN 205562314 U CN205562314 U CN 205562314U CN 201620354417 U CN201620354417 U CN 201620354417U CN 205562314 U CN205562314 U CN 205562314U
- Authority
- CN
- China
- Prior art keywords
- temperature
- simulation
- asphalt
- programmable
- experimental device
- 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
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model provides a but indoor simulation fatigue test device of form bituminous mixture, includes temperature simulation case, temperature simulation incasement bottom is provided with the base, is provided with the thermal -insulated basin of uncovered heat preservation on the base, sets up the microscope carrier that adds that is used for placing the bituminous mixture sample on the thermal -insulated basin of uncovered heat preservation, adds in the microscope carrier top and is provided with and is used for carrying out loaded hydraulic loading system to the bituminous mixture sample, temperature simulation incasement still is provided with the temperature cycle control system who links to each other with PLC. The utility model discloses well test piece base fixing device sets up the simulation that the face structure temperature gradient that satisfies the need had been realized to the thermal -insulated basin of uncovered heat preservation, comes out along with the change in space true road surface structure moderate temperature field in indoor simulation, has fully considered the satisfy the need influence of face structure life -span and performance of temperature load, hydraulic loading system can accurate control the experiment wheel pair test piece load of applying, can simulate the influence that the face structure that satisfies the need was carried to the disalignment simultaneously, realize in the indoor simulation influence of phenomenon such as overweight to bituminous paving life -span and performance that overload.
Description
Technical field
This utility model belongs to road paving materials and designs and produces field, relates to load and asphalt lab simulation fatigue experimental device under temperature coupling, is specifically related to a kind of programmable asphalt lab simulation fatigue experimental device.
Background technology
Since the nineties in last century, along with growing continuously and fast of China's economic, expressway construction cause is also burning the wind, and ends for the end of the year 2014, and China's highway total kilometrage reaches 11.19 ten thousand kilometers, has exceeded the U.S. and has ranked first in the world.More than 90% is had to use asphalt concrete pavement in the highway that oneself builds up, the most whether common road bituminous paving or asphalt pavement of highway all there occurs fatigue cracking in various degree, and have to carry out large repairs and rebuild, the early fatigue cracking of bituminous paving has become as a global problem.
Bituminous paving stands the repeated action of wheel load during use, is chronically at ess-strain crossover variable condition, causes pavement structural strength to be gradually reduced.After load repeat function exceedes certain number of times, the stress produced in road surface under load action will exceed the structure reactance after intensity declines, and makes road surface crackle occur, produces fatigue fracture and destroys.Main fatigue test method can be divided into following four classes:
(1) first kind is that the fatigue test under real car load action of the actual road surface destroys, with the AASHTO Experiment Road of famous American as representative；
(2) Equations of The Second Kind is full size pavement structure Fatigue Test Research under simulated automotive load action, including circular track test and accelerating and loading test, mainly there is the loading equipemtn (ALF) of Australia and highway scientific research institution of Ministry of Communications of China, heavy vehicle simulation car (HVS) of South Africa state-run road institute, the outdoor large circuit of the state university of Washington, DC and the indoor large circular track test of Chongqing Science Institute；
(3) the 3rd classes are test plate (panel) test method(s)s. mainly by rut test with the simulating wheel effect on road surface, understand crack and produce and the form of extension.
(4) the 4th classes are the Fatigue Test Research that test chamber is small-sized.Asphalt first makes the test specimen of definite shape, and the stress simulating bituminous paving the most in some way carries out fatigue test.
First three class method cost is big, cycle length, carry out the most universal.Therefore, a large amount of indoor small fatigue test methods that still cycle is short, expense is little used.Indoor small fatigue test is tested frequently with simple bending, has the most again midpoint to load or the loading of three branches, hinged cantilever beam and three kinds of test methods of trapezoidal cantilever beam.In addition with diametral compression test, beam on elastic foundation bend test, triaxial compression test etc..Wherein four-point bending fatigue life test has been included into highway engineering Colophonium and Asphalt Mixture Experiment code (JTG E20 2011).nullBut the lab simulation of fatigue performance of asphalt mixture can only be simulated the load effect to bitumen mixture specimen at a constant temperature by existing indoor small fatigue test method，And the temperature of each point is all identical with constant temperature the temperature inside the box in whole test specimen，And ignore the existence of outdoor environment temperature change over time and the pavement temperature gradient impact on fatigue performance of asphalt mixture，Cannot simulate asphalt concrete pavement temperature in time with the situation of change in space，The distinctive variations in temperature in different regions and the impact on asphalt concrete pavement fatigue behaviour of the pavement structure thermograde can not be simulated，And girder test specimen bears, at test process and the actual bituminous paving of four-point bending fatigue life test, the diversity that the force-bearing situation existence of vehicular load is bigger，When additionally using two kinds of different loading modes of Stress Control and strain controlling there is larger difference in the result of fatigue test，Existence becomes more meticulous、The problem that integrated and automaticity is low.
The building structure being placed in natural environment, undergos the impact of various Environmental variations at any time so that it is overall state of temperature is among change all the time.And so-called temperature field refers in structure each point in the temperature of each time point.Temperature is over time and the existence of material internal thermograde not only causes the deformation of structure, and can cause bigger temperature stress.Research both at home and abroad shows, temperature stress has the biggest impact, the most high-grade highway engineering to highway engineering service life and mechanical property.Therefore it is accomplished by existing lab simulation fatigue experimental device is improved, it is achieved temperature stress and the coupling of vehicular load.
Utility model content
This utility model is to solve existing test and evaluate the indoor simulation device of fatigue performance of asphalt mixture to true environment simulation deficiency, the shortcoming that the precision of simulation experiment method is too low, it is therefore intended that provide a kind of simple to operate, good stability, degree of accuracy high, compact and simultaneously can be with the programmable asphalt lab simulation fatigue experimental device of temperature and load coupling.
For achieving the above object, this utility model be the technical scheme is that
A kind of programmable asphalt lab simulation fatigue experimental device, including temperature simulation case, described temperature simulation case inner bottom part is provided with base, uncovered insulation tank it is provided with on base, it is provided for placing the loading bench of asphalt sample on uncovered insulation tank, in loading bench, is provided above the hydraulic loading system for asphalt sample is loaded；The temperature circulation control system machine for temperature simulation the temperature inside the box is controlled it is additionally provided with in temperature simulation case.
Described temperature simulation case one side-lower arranges supply fan, arranges scavenger fan below opposite side.
Described temperature circulation control system includes silicone oil high temperature and low temperature circulating device, electric heater unit, compressor and temperature sensor, silicone oil high temperature and low temperature circulating device is connected with electric heater unit, compressor and temperature sensor, compressor, electric heater unit are all connected with the PLC being arranged on outside temperature simulation case with temperature sensor, and PLC connects calculating.
Described hydraulic loading system includes piston rod and the load cylinder that can move horizontally, load cylinder is connected with piston rod, and piston rod is vertically arranged, the lower end of piston rod is provided with pressure transducer, the lower end of pressure transducer is provided with hinged wheel shaft, and hinged wheel shaft is provided with the loading wheel for loading asphalt sample；Described electric heater unit is connected with PLC by the first relay, and compressor is connected with PLC by the second relay, and temperature sensor is connected with PLC by A/D interpreter.
Described hydraulic loading system the most also includes driving motor, drives the output shaft of motor to be connected with hinged wheel shaft.
Being provided with, in described temperature simulation case, the guide rail moved horizontally for hydraulic loading system, load cylinder is arranged on guide rail.
Described temperature sensor is thermistor temperature sensor；In described temperature simulation case, both sides are provided with heating lamp.
Described base is drawing type base；Offer circular port on loading bench, in circular port, be provided with strain transducer.
A diameter of 50mm of described circular port.
Described strain transducer is arranged on asphalt sample bottom centre position.
Described heating lamp is fixed on both sides in simulation box by bolt symmetry, and heating lamp is the one in xenon lamp, Halogen light, dysprosium lamp, iodine-tungsten lamp.
Compared with prior art, the beneficial effects of the utility model are, this utility model is a kind of programmable asphalt lab simulation fatigue experimental device, by arranging temperature simulation case, it is temperature circulation control system above temperature simulation case, the hydraulic loading system for asphalt sample 17 is loaded it is provided with in temperature simulation case, it is provided with temperature sensor on the bearing in temperature simulation bottom portion, temperature simulation case is outside equipped with programmable logic controller (PLC) PLC and computer, temperature circulation control system is positioned at the top of simulation box, this temperature circulation control system is used for heating and cool down oil circulation temperature control system and controls to simulate the temperature inside the box, make simulation box can realize particular locality variations in temperature feature and trend, so can simulate true road surface structure temperature and change over the temperature stress caused.Owing to uncovered heat-insulation and heat-preservation bottom of gullet can inject the distilled water of certain volume, and make just contact with water bottom test piece mould or on a small quantity in entrance water but test specimen does not contacts with water.Owing to distilled water compares specific heat capacity more greatly and again in the lower section of test specimen with bitumen mixture specimen, so the variations in temperature of bottom has certain hysteresis quality, and range of temperature is also little than surface of test piece, so the temperature stress that true road surface structure temperature causes so can be simulated in spatial distribution differences.Silicone oil heat cycles device is connected with electric heater unit and refrigeration compressor by liquid circulating apparatus, controls oil circulation humidity control system is realized the simulation to given temperature field by programmable logic controller (PLC).
Hydraulic loading system can move on guide rail along with the loading of bottom is taken turns to move, and can apply pressure according to setting load, can be in the impact in the factor road pavement life-spans such as lab simulation overload.In this utility model, temperature simulation case temperature control amplitude is-20 DEG C～60 DEG C and can be accurate to 0.1 DEG C, can meet the requirement that most area highway engineering is actual.
The electric heater unit of programmable asphalt lab simulation fatigue experimental device of the present utility model can realize simulating temperature field, different regions over time, is possible not only to realize simulation high-temperature severe environment and is possible with refrigeration compressor and silicone oil temperature circulation control system simulation low temperature adverse circumstances；Test piece base fixing device arranges uncovered insulation tank and achieves the simulation of road pavement structure temperature gradient, by temperature field in true pavement structure with space change at lab simulation out, taken into full account temperature load road pavement structural life-time and the impact of performance；Hydraulic loading system can be precisely controlled the load that test specimen is applied by experiment wheel, can simulate the impact the most coaxially carrying road pavement structure simultaneously, it is achieved in phenomenons such as lab simulation overload are overweight on bituminous paving life-span and the impact of performance.
Further, simulation box both sides are provided with heating lamp, heating lamp power adjustable, can simulate the Intensity of the sunlight of different regions；
Further, the first relay, the second relay and driving motor are connected with programmable logic controller (PLC) by wire, and programmable logic controller (PLC) is connected with computer by wire.
Accompanying drawing explanation
Fig. 1 is the structural representation of programmable asphalt lab simulation fatigue experimental device.
Fig. 2 is circulating heater connection diagram.
In figure, 1 is temperature simulation case, 2 is thermistor temperature sensor, 3 is A/D interpreter, 4 is electric heater unit, 5 is the first relay, 6 is compressor, 7 is the second relay, 8 is silicone oil high temperature and low temperature circulating device, 9 is PLC, 10 is guide rail, 11 is hydraulic jack, 12 for driving motor, 13 is pressure transducer, 14 is hinged wheel shaft, 15 for loading wheel, 16 is loading bench, 17 is bitumen mixture specimen, 18 is strain transducer, 19 is base, 20 is uncovered insulation tank, 21 is discharge outlet, 22 is daylight lamp, 23 is supply fan, 24 is scavenger fan, 25 is computer.
Detailed description of the invention
With embodiment, this utility model is further described below in conjunction with the accompanying drawings, but this utility model is not limited to embodiment disclosed below.
See Fig. 1 and Fig. 2, programmable asphalt lab simulation fatigue experimental device of the present utility model includes temperature simulation case 1, thermistor temperature sensor 2, A/D interpreter 3, electric heater unit 4, first relay 5, compressor 6, second relay 7, silicone oil high temperature and low temperature circulating device 8, PLC 9, guide rail 10, hydraulic jack 11, drive motor 12, pressure transducer 13, hinged wheel shaft 14, load wheel 15, loading bench 16, bitumen mixture specimen 17, strain transducer 18, base 19, uncovered insulation tank 20, discharge outlet 21, daylight lamp 22, supply fan 23, scavenger fan 24 and computer 25.
Concrete, base 19 is set bottom temperature simulation case 1, base 19 is drawing type base, base 19 is fixed uncovered
nullInsulation tank 20，Uncovered insulation tank 20 side arranges discharge outlet 21，On uncovered insulation tank 20, loading bench 16 is set，Bitumen mixture specimen 17 is placed on loading bench 16，The circular port of a diameter of 50mm it is provided with in the middle of loading bench 16，Strain transducer 18 is installed when this circular port is used for loading bottom bitumen mixture specimen 17，And strain transducer 18 is arranged on bitumen mixture specimen 17 bottom centre position，Avoid strain transducer 18 affected by other factors when measuring strain at bitumen mixture specimen 17 bottom center，Temperature simulation case 1 both sides are provided for the guide rail 10 that hydraulic loading system moves horizontally，Wherein，Hydraulic loading system includes piston rod and the load cylinder 11 that can move horizontally，Load cylinder 11 is connected with piston rod，And piston rod is vertically arranged，The load cylinder 11 of hydraulic loading system is joined with bolts on guide rail 10，Hydraulic loading system can do horizontal reciprocating loading along guide rail 10 and move，The piston-rod lower end of hydraulic loading system is fixedly connected with pressure transducer 13，Pressure transducer 13 lower end screw shim is fixedly connected with hinged wheel shaft 14，The loading wheel 15 having for asphalt sample 17 is loaded is connected on hinged wheel shaft 14，Hinged wheel shaft 14 side bolt is installed with driving motor 12，The output shaft driving motor 12 is connected with hinged wheel shaft 14.Temperature simulation case 1 internal upper part arranges electric heater unit 4 and compressor 6, compressor 6 is arranged on below electric heater unit 4, electric heater unit 4 is connected by the first relay 5 and PLC 9, compressor 6 is connected by the second relay 7 and PLC 9, silicone oil high temperature and low temperature circulating device 8 realizes temperature control by pipeline to temperature simulation case 1, temperature simulation case 1 one side-lower arranges supply fan 23, scavenger fan 24 is set below opposite side, and 1 both sides arrange daylight lamp 22 in temperature simulation case, described heating lamp 22 is fixed on both sides in simulation box by bolt symmetry, and heating lamp 22 is xenon lamp, Halogen light, dysprosium lamp, one in iodine-tungsten lamp.The temperature sensor 2 being arranged in temperature simulation case 1 is connected with PLC 9 by A/D interpreter 3, and described temperature sensor 2 is photoconductive resistance temperature sensor；The temperature signal received is converted into voltage signal by temperature sensor 2, the voltage signal of input is converted into the discernible digital quantity of PLC 9 by A/D interpreter 3, then after the temperature value of default is compared process with the temperature value fed back by PLC 9, whether turn on to the first relay 5 and second one control signal control output end of relay 7 input, first relay 5 and the second relay 7 controls electric heater unit 4 respectively and compressor 6 works, to realize the regulation of temperature in temperature simulation case 1.PLC 9 is connected with computer 25 by data connecting line.
Work process of the present utility model is: in experimentation, open drawing type base 19, bitumen mixture specimen 17 is bolted on the loading bench 16 above uncovered heat insulation tank 20, drawing type base 19 is pushed in temperature simulation case 1, making daylight lamp 22 keep constant light source to illuminate, supply fan 23 and scavenger fan 24 run and keep the circulation of temperature simulation case 1 inner air.Computer 25 connects PLC 9 according to design temperature starting point, control temperature simulation case 1 and be heated or cooled to assigned temperature, in keeping 2h to make bitumen mixture specimen 17 and temperature simulation case 1 at a constant temperature, temperature stabilization is after origin temp, set hydraulic loading system parameter, make loading wheel 15 drop to bitumen mixture specimen 17 exact contact and to set pressure, it loaded, set and drive electricity, the actuating speed of 12, makes loading wheel 15 do back and forth movement with setting speed on 17 surfaces of asphalt examination.Computer 25 is according to the temperature data curve set, whether turn on to the first relay 5 and second one control signal control output end of relay 7 input by PLC 9, first relay 5 and the second relay 7 controls electric heater unit 4 respectively and compressor 6 works, it is achieved the regulation of temperature in temperature simulation case 1.Temperature change signal in temperature simulation case 1 is converted into voltage signal by the temperature sensor 2 in simulation box, the voltage signal of input is converted into the discernible digital quantity of PLC 9 by A/D interpreter 3, then after the temperature value of default is compared process with the temperature value fed back by PLC 9, whether turning on to the first relay 5 and second one control signal control output end of relay 7 input, the first relay 5 and the second relay 7 control electric heater unit 4 respectively and compressor 6 work realizes the regulation of temperature in temperature simulation case 1.The pressure transducer 13 that computer 25 fixes connection according to the piston-rod lower end of the strain transducer 18 at bitumen mixture specimen 17 bottom centre and hydraulic jack 11 draws stress-strain diagram, according to the fatigue behaviour attenuation process of the strain variation tracing analysis bitumen mixture specimen of loading procedure Asphalt Mixture test specimen.
Electric heater unit in this utility model is so that the variations in temperature of the internal diverse location of device is more uniform, and can precisely the solar irradiation of board design asphalt concrete pavement location and pavement temperature in time with the spatial variations impact on bituminous paving temperature, improve experimental simulation true temperature environment order of accuarcy.Its charger and can with regulation experiment wheel go and back running speed and experiment wheel to the pressure of test specimen with the simulating vehicle load detrimental effect to bituminous paving.
Claims (10)
1. a programmable asphalt lab simulation fatigue experimental device, it is characterized in that, including temperature simulation case (1), described temperature simulation case (1) inner bottom part is provided with base (19), uncovered insulation tank (20) it is provided with on base (19), it is provided for placing the loading bench (16) of asphalt sample (17) on uncovered insulation tank (20), in loading bench (16), is provided above the hydraulic loading system for asphalt sample (17) is loaded；The temperature circulation control system for temperature in temperature simulation case (1) is controlled it is additionally provided with in temperature simulation case (1).
A kind of programmable asphalt lab simulation fatigue experimental device the most according to claim 1, it is characterized in that, described temperature simulation case (1) side-lower arranges supply fan (23), arranges scavenger fan (24) below opposite side.
A kind of programmable asphalt lab simulation fatigue experimental device the most according to claim 2, it is characterized in that, described temperature circulation control system includes silicone oil high temperature and low temperature circulating device (8), electric heater unit (4), compressor (6) and temperature sensor (2), silicone oil high temperature and low temperature circulating device (8) and electric heater unit (4), compressor (6) is connected with temperature sensor (2), compressor (6), electric heater unit (4) is all connected with the PLC (9) being arranged on temperature simulation case (1) outside with temperature sensor (2), PLC (9) connects computer (25).
A kind of programmable asphalt lab simulation fatigue experimental device the most according to claim 3, it is characterized in that, described hydraulic loading system includes piston rod and the load cylinder (11) that can move horizontally, load cylinder (11) is connected with piston rod, and piston rod is vertically arranged, the lower end of piston rod is provided with pressure transducer (13), the lower end of pressure transducer (13) is provided with hinged wheel shaft (14), and hinged wheel shaft (14) is provided with loading wheel (15) for loading asphalt sample (17)；Described electric heater unit (4) is connected with PLC (9) by the first relay (5), compressor (6) is connected with PLC (9) by the second relay (7), and temperature sensor (2) is connected with PLC (9) by A/D interpreter (3).
A kind of programmable asphalt lab simulation fatigue experimental device the most according to claim 3, it is characterized in that, described hydraulic loading system also includes driving motor (12), drives the output shaft of motor (12) to be connected with hinged wheel shaft (14).
A kind of programmable asphalt lab simulation fatigue experimental device the most according to claim 3, it is characterized in that, being provided with the guide rail (10) moved horizontally for hydraulic loading system in described temperature simulation case (1), load cylinder (11) is arranged on guide rail (10).
A kind of programmable asphalt lab simulation fatigue experimental device the most according to claim 3, it is characterised in that described temperature sensor (2) is thermistor temperature sensor；The interior both sides of described temperature simulation case (1) are provided with heating lamp (22).
A kind of programmable asphalt lab simulation fatigue experimental device the most according to claim 1, it is characterised in that described base (19) is drawing type base；Loading bench offers circular port on (16), is provided with strain transducer (18) in circular port.
A kind of programmable asphalt lab simulation fatigue experimental device the most according to claim 8, it is characterised in that a diameter of 50mm of described circular port.
A kind of programmable asphalt lab simulation fatigue experimental device the most according to claim 8, it is characterised in that described strain transducer (18) is arranged on asphalt sample (17) bottom centre position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620354417.2U CN205562314U (en) | 2016-04-25 | 2016-04-25 | But indoor simulation fatigue test device of form bituminous mixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620354417.2U CN205562314U (en) | 2016-04-25 | 2016-04-25 | But indoor simulation fatigue test device of form bituminous mixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205562314U true CN205562314U (en) | 2016-09-07 |
Family
ID=56807471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620354417.2U Expired - Fee Related CN205562314U (en) | 2016-04-25 | 2016-04-25 | But indoor simulation fatigue test device of form bituminous mixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205562314U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106768779A (en) * | 2016-12-28 | 2017-05-31 | 武汉理工大学 | The mobile impact wheel load experimental rig and test method of a kind of clamped combination of freely-supported |
| CN107655778A (en) * | 2017-11-17 | 2018-02-02 | 长安大学 | A kind of programmable water-stable gravel two-phase rolls scouring instrument |
| CN110006946A (en) * | 2019-05-07 | 2019-07-12 | 南京林业大学 | The indoor simulation test macro and method of a kind of bituminous pavement temperature field |
-
2016
- 2016-04-25 CN CN201620354417.2U patent/CN205562314U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106768779A (en) * | 2016-12-28 | 2017-05-31 | 武汉理工大学 | The mobile impact wheel load experimental rig and test method of a kind of clamped combination of freely-supported |
| CN106768779B (en) * | 2016-12-28 | 2019-01-22 | 武汉理工大学 | A kind of mobile impact wheel load experimental rig and test method of the clamped combination of freely-supported |
| CN107655778A (en) * | 2017-11-17 | 2018-02-02 | 长安大学 | A kind of programmable water-stable gravel two-phase rolls scouring instrument |
| CN107655778B (en) * | 2017-11-17 | 2024-02-02 | 长安大学 | Two-phase rolling and flushing instrument for programmable water-stabilized macadam base |
| CN110006946A (en) * | 2019-05-07 | 2019-07-12 | 南京林业大学 | The indoor simulation test macro and method of a kind of bituminous pavement temperature field |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105784520A (en) | Indoor programmable asphalt mixture fatigue simulation test device | |
| CN102788873B (en) | Simulation tester for self healing of asphalt concrete cracks | |
| CN205562314U (en) | But indoor simulation fatigue test device of form bituminous mixture | |
| CN105136587A (en) | Bituminous mixture rutting test device | |
| CN202854132U (en) | Self-healing simulation tester for asphalt concrete cracks | |
| CN204988883U (en) | Bituminous mixture wheel tracking test device | |
| CN203595634U (en) | Multifunctional asphalt pavement durability tester | |
| CN203643280U (en) | Asphalt mixture fatigue test device | |
| CN201378131Y (en) | Pavement structure small-sized test terrace capable of simulating load and environment comprehensive function | |
| CN205749164U (en) | A kind of sandwich establishment asphalt Reflection Cracking performance testing device | |
| CN107560954B (en) | Method for testing self-healing effect of sand-containing fog sealing layer with shape memory performance | |
| CN105445119A (en) | Device and method for testing torsion resistance and shear performance of bituminous mixture | |
| CN104913984A (en) | Pavement material double-layer cylinder specimen compression and torsion combination fatigue test method and device | |
| CN106896029A (en) | Reflective Crack over Asphalt Pavement with Semi-rigid extended simulation device and analogy method | |
| CN111579400A (en) | Asphalt pavement reflection crack propagation simulation test device with middle layer | |
| CN105300758A (en) | Asphalt mortar molding and measuring devices and testing method of dynamic shear parameters of asphalt mortar | |
| Zhang et al. | Research on Fatigue Model of Semi‐Rigid Base Asphalt Pavement before and after Polymer Grouting | |
| CN201583459U (en) | Shearing fatigue tester | |
| Sun et al. | Research on maintenance equipment and maintenance technology of steel fiber modified asphalt pavement with microwave heating | |
| CN204758384U (en) | Semi rigid base course material fracture simulating measurement setup | |
| CN203616192U (en) | Testing device for cold patch asphalt rut test piece | |
| CN109374434A (en) | Asphalt concrete pavement material shearing performance test device | |
| CN205749139U (en) | Sandwich establishment asphalt Reflection Cracking performance testing device | |
| CN205192441U (en) | Two -way test sensor that meets an emergency of cylindrical experimental test piece based on fiber grating | |
| CN104931365B (en) | A kind of detect twists device and its assay method that stranding effect damages road surface |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160907 Termination date: 20170425 |