CN110095352A - A kind of bituminous pavement interlayer performance test method and device - Google Patents
A kind of bituminous pavement interlayer performance test method and device Download PDFInfo
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- CN110095352A CN110095352A CN201910335110.6A CN201910335110A CN110095352A CN 110095352 A CN110095352 A CN 110095352A CN 201910335110 A CN201910335110 A CN 201910335110A CN 110095352 A CN110095352 A CN 110095352A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
Abstract
The present invention relates to technical field of road engineering, and in particular to bituminous pavement interlayer performance test method and device, it is therefore an objective to provide a method that can accurately test bituminous pavement interlayer performance according to actual road conditions；The technical solution adopted is that: the following steps are included: obtaining section actual road conditions to be measured, core sample in section to be measured；Intensity shearing inclination is calculated according to road conditions, and inter-layer shearing strength test is carried out to core sample with intensity shearing inclination, obtains inter-layer shearing strength；The test of interlayer shear fatigue life is carried out to core sample according to road conditions computation layer fatigue shearing inclination, and with tired shearing inclination, obtains interlayer shear fatigue life；Comprehensive inter-layer shearing strength, interlayer shear fatigue life, assess interlayer performance.The present invention can accurately test bituminous pavement interlayer performance according to actual road conditions.Device provided by the invention, structure is simple, can adjust the shearing inclination of test, tiltedly can cut test to laboratory core sample and the progress of real road core sample, applied widely.
Description
Technical field
The present invention relates to technical field of road engineering, and in particular to a kind of bituminous pavement interlayer performance test method and dress
It sets.
Background technique
One of an important factor for superiority and inferiority of asphalt pavement structural layer Coating combination is the influence bituminous pavement service life, especially road
Big longitudinal gradient section, minor radius section and the vehicle acceleration and deceleration region on road etc., road surface structare layer can bear bigger horizontal loading.
After load repeat function certain number, easily cause road surface structare layer interlayer fatigue rupture, formed when serious a large amount of track,
It elapses, gather around the diseases such as packet, crack.In the construction technology of bituminous pavement, if interlayer is mishandling, bituminous pavement morning will also result in
Phase disease, serious curtailment bituminous pavement service life.
Domestic and foreign scholars are research bituminous pavement interlayer performance, a large amount of experimental study have been carried out, wherein being made most
It is interlaminar shear strength test and interlayer shear fatigue test, and uses bituminous pavement interlayer shearing strength, shear fatigue service life
Etc. indexs assess interlayer performance.In actual construction, construction technology, construction environment, construction tool, construction personnel it is skilled
The factors such as degree and road years already spent will affect bituminous pavement interlayer performance and interlayer performance caused to decay.Therefore, exist
It is only performance ideally to the test result of molding bituminous pavement interlayer performance in laboratory, can not represents completely
The interlayer performance of actual road conditions.On the other hand, the difference of actual road conditions, bituminous pavement interlayer stress also can be different, example
Such as different category of roads, big longitudinal slope road conditions, heavy traffic heavy duty road conditions, the braking of tunnel entrance accelerate road conditions, minor radius
Sharp turn section road conditions etc..
Currently, domestic and international researcher is to study the test mode of bituminous pavement interlayer shear behavior, it is broadly divided into three classes: straight
It cuts, tiltedly cut and torsion is cut.The mode of staight scissors does not account for the interlocking that interlayer is strengthened perpendicular to the compression of interface layer,
So being only used for " adhesive property " of assessment interlaminar bonding oil, the interlayer being unable to for evaluating bituminous pavement is comprehensive
Energy.The ununified standard of shearing inclination (position of experiment loading force and the angle of interface layer), such as uses 45 °, 27 ° of angle
Oblique scissor test etc.；And shearing inclination be it is fixed, represent when carrying out oblique scissor test, the stress state of interlayer be it is fixed,
A certain road conditions situation can only be embodied.Torsion, which is cut, applies rotational shear by torque force device, destroys maximum shear when occurring and answers
Power is interlayer maximum shear strength；But the instrument also without consider perpendicular to interface layer compression to interlayer performance
Influence, be simply possible to use in the poor bond strength between layers of test performance.Therefore existing bituminous pavement interlayer performance test mode, and
The bituminous pavement interlayer stress state being unable under the various different road conditions of accurate description.Therefore it needs a kind of can more accurately test drip
The method of green road surface interlayer performance.
Summary of the invention
Answering under the various different road conditions of accurate description is unable to for above-mentioned existing bituminous pavement interlayer performance test method
The technical issues of power state, the present invention provides a kind of bituminous pavement interlayer performance test method and devices, can be according to reality
The road conditions on border accurately test bituminous pavement interlayer performance.
The present invention is achieved through the following technical solutions:
The following steps are included:
Section actual road conditions to be measured, core sample in section to be measured are obtained, the section actual road conditions to be measured include section road to be measured
The coefficient of friction of face and vehicle tyre, vehicle driving acceleration, road longitudinal grade, pavement temperature, design speed per hour, turning radius, vehicle
Driving axis weight, vehicle driving tire pressure；
It is calculated according to the coefficient of friction of the road surface in section to be measured and vehicle tyre, pavement temperature and obtains intensity shearing inclination,
Before carrying out inter-layer shearing strength test, test device, sample bulk temperature are adjusted to section pavement temperature to be measured again with intensity
Shearing inclination tests core sample, obtains shearing strength at intersection shearing stress；
According to the design speed per hour in section to be measured, turning radius, road longitudinal grade, travel acceleration, calculate acquisition fatigue shearing
Angle adjusts test device, sample bulk temperature to section pavement temperature to be measured before carrying out the test of interlayer shear fatigue life
Core sample is tested with tired shearing inclination again, obtains interlayer shear fatigue life；
Comprehensive inter-layer shearing strength, interlayer shear fatigue life data, assess interlayer performance.
The present invention also provides a kind of bituminous pavement interlayer structural behaviour test devices for above-mentioned test method, can root
The shearing inclination of test is adjusted according to oblique shearing shearing inclination needed for test.Biography including pedestal, right above pedestal
Power column is provided with shearing clamp between the pedestal and force-transmitting pole, the shearing clamp is for clamping sample, the shearing clamp
Be divide into upper part and lower part, the shearing clamp top and bottom are arc-shaped, the pedestal upper end be equipped with under shearing clamp
The circular arc notch of adaptation is held, there is the circular arc notch being adapted to shearing clamp upper end in the force-transmitting pole lower end.
Preferably, the pedestal lower part is provided with the rolling member that can be scrolled left and right.
Preferably, the pedestal lower end is equipped with cushion cap, and the rolling member is between pedestal and cushion cap, the cushion cap left end
Equipped with spring, the spring one end is fixed on cushion cap left end, one end is fixed on chassis left side wall.
Preferably, two parts central symmetry above and below the shearing clamp
Compared with prior art, the present invention having the following advantages and benefits:
1, the present invention can carry out interlayer performance test to the sample containing interface layer according to actual road conditions feature.Layer
Between performance test be divided into shear strength test with shear fatigue test.It tests to obtain interface layer by shearing strength at intersection shearing stress
Shear strength；The load cycle-index (fatigue life) of interface layer is obtained by interlayer shear fatigue test.With anti-shearing
Intensity, shear fatigue service life two indices assess the road surface interlayer cementing situation of real road, can accurately more react road
Performance.
2, test device provided by the invention can be adjusted according to the size of shearing inclination, to adapt to different road conditions
The test of bituminous pavement interlayer structural behaviour, can be with blacktop intersexuality ideally molding in test experiments room
Can, structure is simple；Also can drill core core sample to real road carry out interlayer performance test, assess the road in this approach
Practical interlayer performance.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is test method flow diagram of the invention；
Fig. 2 is the section road surface coefficient of friction resistance schematic diagram that the present invention surveys.
Fig. 3 is schematic structural diagram of testing device of the invention；
Fig. 4 tiltedly cuts fixture schematic perspective view for of the invention；
Fig. 5 is test device test device use state diagram of the invention；
Label and corresponding parts title in attached drawing:
1- pedestal, 2- force-transmitting pole, 3- shearing clamp, 4- rolling member, 5- cushion cap, 6- spring.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment
The present embodiment is to rely on to carry out with southeastern coast city heavy-duty traffic asphalt pavement engineering, specific test method step
It is rapid as follows:
Section actual road conditions to be measured are tested, friction coefficient μ, vehicle driving including section road surface to be measured and vehicle tyre add
Fast a1, road longitudinal grade α, pavement temperature T, design speed per hour V, turning radius R, vehicle driving axis weight G, vehicle driving tire pressure P.This reality
Apply the coefficient of friction resistance that column are tested using III type pendulum friction coefficient determinator of BM- under bituminous pavement different temperatures in section to be measured.It is real
It measures and relies on the road surface coefficient of friction resistance in engineering section as shown in Fig. 2, remaining traffic information is as shown in table 1:
Actual road conditions application form
| Design speed per hour V | Knuckle radius R | Road longitudinal grade α | Drive a vehicle tire pressure P | Travel acceleration a1 | Pavement temperature T |
| 80kM/h | 900m | 4°00′15″ | 0.7MPa | 2.1m/s2 | 15℃ |
Table 1
It should be noted that shearing inclination θ is the position and interlayer circle of loading force F when carrying out interlayer performance test
The angle in face；When carrying out interlayer performance test, the position and interface layer of loading force F forms angle, and loading force F is decomposed are as follows:
Perpendicular to interface layer pressure, be parallel to the shearing force of interface layer.In order to make interlayer stress and reality in test
The interlayer stress of road conditions is consistent, then should meet the following conditions:
In formula: the loading force (N) when F-interlayer performance test
S-sample interface layer area (m2)
The angle (° ' ") of θ-loading force F position and interface layer
It can thus be seen that the factor of bituminous pavement is subject under any influence actual road conditions pressure and shearing force all can shadow
Ring the size of angle, θ value.It is specific:
1. the coefficient of friction resistance on road surface and vehicle tyre
When vehicle emergency brake, sliding friction occurs between vehicle tyre and bituminous pavement, road surface is subject to parallel at this time
Shearing force in road surface is force of sliding friction caused by tire road pavement (size is mg μ).Coefficient of friction resistance μ between tire and road surface
The size that will determine force of sliding friction (mg μ), to influence the value of θ.And the size of μ with surface roughness in addition to having outside the Pass also
There is the temperature on road surface related.
2. travel acceleration
When vehicle accelerate with Reduced Speed Now, travel acceleration a can be generated, the thrust of this acceleration derives from road surface
Stiction between tire.In the case where ignoring car resistance, the size of this stiction is vehicle acceleration and deceleration traveling
Required thrust ma.Acceleration a is bigger, and the stiction between tire and road surface is also bigger, caused by vehicle tyre road pavement
The shearing force for being parallel to road surface is also bigger, to influence the value of θ.
3. road longitudinal grade
When road longitudinal grade is α, vehicle weight can go out be parallel to the component on road surface along longitudinal slope Directional Decomposition, and (size is
Mgsin α), which directly acts on road surface as the shearing force for being parallel to road surface.Longitudinal slope angle [alpha] is bigger, the component of gravity
It is bigger, then caused by be parallel to road surface shearing force it is bigger, to influence the value of θ.This is also that heavy grade road surface is easy to appear
The major reason of interlayer disease.
4. highway layout speed per hour and turning radius
Vehicle when driving, can generate centripetal acceleration V on bend2/ R needs road surface to provide centripetal force to vehicle, in road
In the case of road horizontal slope does not have superelevation, this centripetal force needs are provided by road surface stiction.At this point, vehicle tyre can road pavement
The shearing force for being parallel to road surface is caused, centripetal acceleration is bigger, then shearing force is bigger, to influence the value of θ.
5. vehicle, tire pressure
The vehicle and tire pressure of vehicle directly determine the pressure size perpendicular to road surface, to influence the value of θ, this implementation
Example is by taking heavy-load automobile as an example, that is, has selected worst road conditions.
Then section to be measured is sampled, obtains several test samples；Usually using core drilling machine to the section asphalt road
Face carries out core boring sampling, obtains upper layer and middle surface layer and containing the cylinder core sample including its interface layer.Core sample is cut
Processing is cut, so that interface layer top and the bottom have the asphalt of 20mm~60mm, to guarantee the integrality of interface layer.
For the diameter of cylindrical body, determine that this implementation is classified as according to the diameter that used shearing clamp accommodates core sample cavity
150mm。
Friction coefficient μ, the pavement temperature T on road surface and vehicle tyre then according to the section to be measured of acquisition calculate Strong shear
Angle；The value-based algorithm of intensity shearing inclination θ is as follows:
In formula: the coefficient of friction resistance between 15 DEG C of corresponding road surfaces of μ-temperature and tire.
, it is understood that strength test is for testing the maximum shear stress that interface layer is able to bear.The method is used
The shear action of road pavement interlayer when can assess interface layer bear vehicle emergency brake.When vehicle emergency brake, vehicle
The shear stress that gravity and force of sliding friction comprehensive function road pavement structure sheaf interlayer generate is maximum；And vehicle is having road longitudinal grade
Road surface on when carrying out brake operation, from be parallel to the shearing force on road surface with perpendicular to the pressure on road surface:
In formula: the coefficient of friction resistance of tire and road surface under μ-braking state
α-road longitudinal grade angle (° ' ")
It therefore, can be only according to the coefficient of friction resistance of vehicle tyre and road surface to be measured when carrying out the testing experiment of shear strength
It calculates.
When carrying out the test of shearing strength at intersection shearing stress, after the sample of acquisition is put into test device, by test device, sample temperature
It adjusts to section pavement temperature to be measured and carries out inter-layer shearing strength test.This implementation column is hydraulic more using UTM-100 dynamic servo
Functional material pilot system provides equipment as loading force；1h opens UTM-100 power supply and insulating box in advance before experiment, by constant temperature
Box temperature degree is adjusted to 15 DEG C (actual temperature in section to be measured) completions and is preheated；By core sample to be measured and tiltedly cuts fixture and be put into insulating box
At least 1h is preheated, guarantees that the temperature of sample and device all reaches 15 DEG C of preset temperature.
The angle, θ that fixture is tiltedly cut in adjustment keeps it identical as intensity shearing inclination size, and installation displacement sensor (is mounted on core
On the outside of sample interface layer), device is integrally put into insulating box after completing installation, maintains 30min to guarantee in device and sample
Outer temperature all reaches 15 DEG C of preset temperature.Then UTM-100 equipment force application rod is adjusted, so that force application rod and device loading position are light
Light contact.Starting press machine is further applied load, until stopping press machine after sample interlayer generates obvious destruction, records maximum load
Pressure FmaxFor 33.443kN.In entire loading procedure, maintain to remain unchanged for 15 DEG C of temperature in insulating box.It is calculated after the completion of load
Interface layer shear strength τmax, calculation formula are as follows:
In formula: Fmax- maximum load pressure (N)
S-sample interface layer area (m2)
The angle (° ' ") of θ-load line of force and interface layer
D-sample interface layer diameter (m)
F at this timemax、τmaxRespectively road surface interface layer of the road under actual road conditions can under 15 DEG C of environment of temperature
The maximum shear stress of receiving and the shear strength of the interface layer, i.e. acquisition shearing strength at intersection shearing stress.
It is tired according to design speed per hour, turning radius, road longitudinal grade, the travel acceleration computation layer in the section to be measured of acquisition simultaneously
Labor shearing inclination；Wherein the value of tired shearing inclination θ is as follows:
In formula: the comprehensive acceleration (m/s of a-driving2)
α-road longitudinal grade (° ' ")
The value for wherein integrating acceleration a needs to consider travel acceleration a1With the centripetal acceleration of Ackermann steer angle, value
Solution mode such as following formula:
In formula: a1- travel acceleration (m/s2)
R-knuckle radius (m)
V-design speed per hour (m/s).
It should be understood that shear fatigue test is used to test the fatigue life of interlaminar bonding.Vehicle in the process of moving,
It is one accelerate, slow down, at the uniform velocity in the process constantly converted, the power of vehicle acceleration and deceleration is really the friction by tire and road surface
Power is provided.The effect of moving in circles of the interaction variation and not coaxial loaded vehicle of acceleration in vehicle travel process, makes road surface
Interface layer is in fatigue loading state, and shear fatigue is easily caused to destroy.Vehicle carries out acceleration or deceleration on having longitudinal slope road
When operation, the component for needing to overcome gravity along longitudinal slope, from being parallel to the shearing force on road surface and perpendicular to the pressure on road surface:
In formula: α-road longitudinal grade angle (° ' ")
G-acceleration of gravity (m/s2)
A-travel acceleration (m/s2)
When carrying out the test of interlayer shear fatigue life, after the sample of acquisition is put into test device, by test device, sample temperature
Degree adjusts to section pavement temperature to be measured and carries out the test of interlayer shear fatigue life.This implementation column uses UTM-100 dynamic servo
Multifunctional hydraulic material test system provides equipment as loading force；1h opens UTM-100 power supply and insulating box in advance before experiment,
Calorstat temperature is adjusted to 15 DEG C (actual temperature in section to be measured) completions and is preheated；By core sample to be measured and tiltedly cuts fixture and be put into perseverance
At least 1h is preheated in incubator, guarantees that the temperature of sample and device all reaches 15 DEG C of preset temperature.
The angle, θ that fixture is tiltedly cut in adjustment keeps it identical as tired shearing inclination size, and installation displacement sensor (is mounted on core
On the outside of sample interface layer), device is integrally put into insulating box after completing installation, maintains 30min to guarantee in device and sample
Outer temperature all reaches 15 DEG C of preset temperature.It sets UTM-100 equipment and loads force parameter.This implementation column uses control stress method, tired
Fatigue load in labor test requires the periodic function changed over time for power, passes through testing machine set-up of control system fatigue load
The waveform of periodic function is versed sine wave, frequency 10Hz, amplitude F are 14.18kN.Wherein amplitude F is determined by driving tire pressure P, meter
Calculate formula are as follows:
It can thus be concluded that
In formula: S1- sample interface layer area (m2)
P-driving tire pressure (Pa)
F-fatigue load amplitude (N)
After the completion of fatigue load parameter setting, UTM-100 force application rod is adjusted, so that force application rod and device loading position are gently
Contact.Start testing machine and carry out fatigue load test, stiffness modulus when using load ringing 50 times is as initial stiffness mould
Amount, stiffness modulus decline 50% are considered as fatigue rupture, stop test, record fatigue after the thorough fatigue rupture of sample interface layer
When destruction, fatigue load CYCLIC LOADING times N is 13416 times (i.e. acquisition interlayer shear fatigue life).During entire test
15 DEG C of temperature in holding insulating box are constant.
Comprehensive interlayer shear strength test and interlayer shear fatigue life test data obtained, i.e., comprehensive interlayer is anti-
Shear strength τmaxFatigue life N is cut with shearing strength at intersection to assess the performance of road.τmaxIt is worth bigger, road under the actual road conditions
The shear behavior of face interface layer is better, and the performance for bearing the operation of vehicle emergency brake is better.The reflection of fatigue life N is the reality
The load ringing number that bituminous pavement upper and lower level interface layer is able to bear under the road conditions of border.Fatigue life, N was bigger, interlayer circle
The number of loading that face is able to bear is more, and the anti-shearing fatigue behaviour of interface layer is better.This will actually obtain data go out
Has the report of bituminous pavement interlayer performance.
In addition, this method is also applied for the sample coupon of laboratory preparation, data branch is provided for the detail design in practical section
S2 step need to only be replaced with making in laboratory core sample by support, when operation.
For the installation for meeting different shearing inclination θ, this example additionally provides a kind of for the test of bituminous pavement interlayer performance
Device, including pedestal 1, the force-transmitting pole 2 right above pedestal 1, it is to be understood that in use, pedestal is mounted on press machine
Workbench on, 2 upper end of force-transmitting pole is fixedly connected with the pressure output end of press machine, and face pedestal 1.The pedestal 1 and biography
Shearing clamp 3 is provided between power column 2, the shearing clamp 3 is divide into upper part and lower part for clamping sample, top and bottom are equal
For arc-shaped, 1 upper end of pedestal is equipped with the circular arc notch being adapted to 3 lower end of shearing clamp, and 2 lower end of force-transmitting pole has and cuts
The circular arc notch of 3 upper end of fixture adaptation is cut, the loading force that press machine is exported passes to shearing clamp 3.It should be noted that
The side of shearing clamp 3 is with circular arc camber, according to the range of the size of practical core sample and adjustment angle, by circular arc camber
Radius of curvature is set as 120mm.The loading force of press machine can uniformly be passed to shearing clamp 3 by circular arc camber, and
It can prevent shearing clamp 3 from rotating in stress.Therefore about 3 two parts of shearing clamp can be assembled into outer dia
The circle of 240mm, so that shearing clamp 3 is can be placed at after being installed on pedestal 1, and (small with different angles
In 90 °) it is placed on pedestal 1, with angle-adjustable, meet the oblique shearing test of different shearing inclinations.Shearing clamp 3 simultaneously
Inside has cylindrical headroom for storing, and the cavity diameter for the present embodiment cylinder isA height of 120mm；If
When testing, corresponding cushion block then is arranged in its end less than 120mm in core sample height, is cut with ensuring that interlayer section is located at
It cuts in the two-part intermediate gaps of about 3 fixture.
Further, 1 lower part of pedestal is provided with the rolling member 4 that can be scrolled left and right.To guarantee that pedestal 1 horizontal can move
It is dynamic, it avoids applying superfluous constraint to shearing clamp, influences test result.Rolling member 4 can be idler wheel, roller, solid cylinder
Deng, to ensure to provide in test enough support forces without being damaged, preferably roller, and be arranged at intervals with multiple.
More optimizedly, 1 lower end of pedestal is equipped with cushion cap 5, and the rolling member 4 is described between pedestal 1 and cushion cap 5
5 left end of cushion cap is equipped with spring 6, and described 6 one end of spring is fixed on 5 left end of cushion cap, one end is fixed on 1 left side wall of pedestal.It can prevent
The only inertia sliding of pedestal 1, it is ensured that stablizing for test carries out.The right end in cushion cap 5, corresponding spring 6 also can be set in spring 6
The other end be then fixed on the right end of pedestal 1.The end of cushion cap 5 can be set protrusion for fixed spring 6 and stop pedestal 1,
Also baffle can be set, the present embodiment is preferably baffle.About 3 two parts central symmetry of shearing clamp, on the one hand can
Facilitate the Fast Installation of shearing clamp 3, core sample, on the other hand can also guarantee that the center of core sample is located at the position of loading force
On.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of bituminous pavement interlayer performance test method, which comprises the following steps:
Obtain section actual road conditions to be measured, core sample in section to be measured；
Intensity shearing inclination is calculated according to road conditions, and inter-layer shearing strength test is carried out to core sample with intensity shearing inclination, is obtained
Inter-layer shearing strength；
Tired shearing inclination is calculated according to road conditions, and the test of interlayer shear fatigue life is carried out to core sample with tired shearing inclination,
Obtain interlayer shear fatigue life；
Comprehensive inter-layer shearing strength, interlayer shear fatigue life, assess interlayer performance.
2. bituminous pavement interlayer performance test method according to claim 1, it is characterised in that: the section to be measured is practical
Road conditions include the coefficient of friction on section road surface to be measured and vehicle tyre, vehicle driving acceleration, road longitudinal grade, pavement temperature, set
Timing speed, turning radius, vehicle driving axis weight, vehicle driving tire pressure.
3. bituminous pavement interlayer performance test method according to claim 2, it is characterised in that: the intensity shearing inclination
It is calculated and is obtained according to the coefficient of friction of the road surface in section to be measured and vehicle tyre, pavement temperature.
4. bituminous pavement interlayer performance test method according to claim 3, it is characterised in that: carry out inter-layer shearing strength
Before test, test device, sample bulk temperature are adjusted to section pavement temperature to be measured and tested again.
5. bituminous pavement interlayer performance test method according to claim 2, it is characterised in that: the fatigue shearing inclination
According to the design speed per hour in section to be measured, turning radius, road longitudinal grade, travel acceleration, calculate acquisition.
6. the bituminous pavement interlayer performance test method according to claim 5, it is characterised in that: carry out interlayer and cut
Before cutting fatigue life test, test device, sample bulk temperature are adjusted to section pavement temperature to be measured and tested again.
7. a kind of bituminous pavement interlayer performance test device, it is characterised in that: the test device is for realizing any of the above one
Test method described in claim, including pedestal (1), the force-transmitting pole (2) being located at right above pedestal (1), the force-transmitting pole (2) is used
In being connect with press machine output end to transmit loading force, shearing clamp (3) are provided between the pedestal (1) and force-transmitting pole (2),
The shearing clamp (3) is for clamping sample, and the shearing clamp (3) is divide into upper part and lower part, shearing clamp (3) upper end
It is arc-shaped with lower end, pedestal (1) upper end is equipped with the circular arc notch being adapted to shearing clamp (3) lower end, the power transmission
There is the circular arc notch being adapted to shearing clamp (3) upper end in column (2) lower end.
8. bituminous pavement interlayer performance test device according to claim 7, it is characterised in that: pedestal (1) lower part
It is provided with the rolling member (4) that can be scrolled left and right.
9. bituminous pavement interlayer performance test device according to claim 8, it is characterised in that: pedestal (1) lower end
Equipped with cushion cap (5), the rolling member (4) is located between pedestal (1) and cushion cap (5), and cushion cap (5) left end is equipped with spring (6),
Described spring (6) one end is fixed on cushion cap (5) left end, one end is fixed on pedestal (1) left side wall.
10. bituminous pavement interlayer performance test device according to claim 7, it is characterised in that: the shearing clamp (3)
Upper and lower two parts central symmetry.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113970494A (en) * | 2021-10-25 | 2022-01-25 | 北京建筑大学 | Test piece of asphalt pavement interlayer material in local release state and shear strength evaluation method |
| CN114235542A (en) * | 2021-12-24 | 2022-03-25 | 扬州大学 | Tensile and shear test method for fiber-reinforced asphalt mortar porous plate strip |
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