CN111579400A - Asphalt pavement reflection crack propagation simulation test device with middle layer - Google Patents
Asphalt pavement reflection crack propagation simulation test device with middle layer Download PDFInfo
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- CN111579400A CN111579400A CN202010565094.2A CN202010565094A CN111579400A CN 111579400 A CN111579400 A CN 111579400A CN 202010565094 A CN202010565094 A CN 202010565094A CN 111579400 A CN111579400 A CN 111579400A
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- 238000012360 testing method Methods 0.000 title claims abstract description 133
- 239000010426 asphalt Substances 0.000 title claims abstract description 49
- 238000004088 simulation Methods 0.000 title claims abstract description 30
- 239000011384 asphalt concrete Substances 0.000 claims description 11
- 230000001276 controlling effect Effects 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000004062 sedimentation Methods 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 11
- 238000005336 cracking Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 9
- 239000010410 layer Substances 0.000 description 38
- 239000010419 fine particle Substances 0.000 description 5
- 238000011160 research Methods 0.000 description 4
- 239000002344 surface layer Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/34—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by mechanical means, e.g. hammer blows
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0037—Generation of the force using mechanical means involving a rotating movement, e.g. gearing, cam, eccentric, or centrifuge effects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0062—Crack or flaws
- G01N2203/0066—Propagation of crack
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0688—Time or frequency
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- Life Sciences & Earth Sciences (AREA)
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- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses an asphalt pavement reflection crack propagation simulation test device with an intermediate layer. The asphalt pavement simulation platform comprises a base, wherein a movable plate and a settlement plate are arranged on the base, and a horizontal power device is arranged on the movable plate. The wheel-mounted device comprises a test wheel, a sliding device, a sliding rod, a connecting platform, a test wheel telescopic device, a loading test block and the like, and is connected with a wheel-mounted power device. The method simulates temperature type (open type) reflection cracks from the horizontal direction and load type (shear type) reflection cracks from the vertical direction, truly and closely simulates the generation and the expansion of actual reflection cracks of the semi-rigid base asphalt pavement, analyzes and compares the anti-cracking effects of different asphalt pavement intermediate layer materials, reasonably selects the types of the intermediate layer materials, and has important significance for delaying the asphalt pavement reflection cracks and prolonging the service life of the pavement.
Description
Technical Field
The invention relates to the field of research on reflection cracks of a semi-rigid base asphalt pavement in road engineering, in particular to an asphalt pavement reflection crack propagation simulation test device with an intermediate layer.
Background
The development and construction of road traffic infrastructure is an important foundation for the development of national economy and society, and in recent years, the road traffic industry of China is rapidly developed. Statistically, more than 90% of the already-built highways use asphalt pavement, and among these asphalt pavements, the semi-rigid base course is the main structural form. However, since the semi-rigid material has the characteristics of dry shrinkage and temperature shrinkage, shrinkage cracking is easily caused under the action of ambient temperature and humidity, and meanwhile, under repeated rolling of vehicle load, stress at the top end of the crack is concentrated, the crack of the semi-rigid base layer gradually expands from bottom to top, so that the bottom of the asphalt surface layer cracks, and the crack further expands upwards until the crack of the asphalt surface layer is communicated, so that a reflection crack is formed. Reflective cracks have been investigated as a major defect of this structure.
For reflection cracking, it is now generally recognized by the road academy that under reciprocating vehicle loads and temperature stresses, or both, it is believed that the cracks or joints tend to develop shear or tensile stress concentrations at the asphalt layer base that, when these shear or tensile stresses exceed the asphalt layer shear or tensile strength, cause the asphalt layer base to crack and gradually extend throughout the asphalt pavement.
Road scholars and scientific research institutions at home and abroad also develop a plurality of semi-rigid base asphalt pavement reflection crack test devices and methods. The method mainly comprises the steps of simulating tensile, bending and shearing fatigue cracking of a structural layer, analyzing the fatigue cracking process of the structural layer, researching the fracture characteristic of the structural layer and evaluating the anti-cracking effect of the structural layer, but at present, no unified fatigue simulation test method exists, test methods adopted by various countries are different, and corresponding simulation test methods adopted by different structural types are different. Some domestic scholars or scientific research institutions adopt large-scale full-scale fatigue tests to simulate the crack generation process, but the test consumes more materials, has long test period and unstable test data. Therefore, in order to deeply research the performance of the asphalt mixture for inhibiting the reflection cracks, the development of the indoor simulation test device for the reflection cracks of the asphalt pavement, which can truly reflect the formation and the expansion processes of the reflection cracks of the structural layer material and is simple, feasible and convenient to operate, has very important significance.
Disclosure of Invention
The invention aims to solve the technical problems that in the prior art, the semi-rigid base asphalt pavement reflection crack test has more test consumables, long test period and unstable test data, and aims to provide an asphalt pavement reflection crack propagation simulation test device with an intermediate layer, which solves the problems of simple and convenient operation and reliable data of the semi-rigid base asphalt pavement reflection crack test.
The invention is realized by the following technical scheme:
a bituminous pavement reflection crack propagation simulation test device with an intermediate layer comprises a case, a bituminous pavement simulation platform, a wheel load device and a temperature regulating device, wherein the bituminous pavement simulation platform, the wheel load device and the temperature regulating device are sequentially arranged in the case from bottom to top; the wheel-load device comprises a loading test block, a test wheel expansion device, a connecting platform, a sliding device and a test wheel which are sequentially connected from top to bottom, wherein a sliding rod is arranged on the sliding device, the connecting platform is connected with a wheel-load power device, the wheel-load power device is used for controlling the wheel-load device to move left and right, adjusting the moving rate of the wheel-load device and recording the wheel-load rolling times, the test wheel telescopic device is driven to enable the test wheel to be in contact with or far away from the first test piece, and the temperature adjusting device comprises a heating device and a temperature sensor.
The test apparatus of the present invention can simulate not only a temperature type (open type) reflection crack from the horizontal direction but also a load type (shear type) reflection crack from the vertical direction. Firstly, an intermediate layer test specimen (a first specimen) and a fine grain type asphalt concrete specimen (a second specimen) which are stacked together are adopted, the specimens are fixed on a movable plate and a settlement plate through specimen clamps, a reserved seam is reserved between the movable plate and the settlement plate, a loading test block is arranged, a test wheel expansion device is adjusted, a test wheel is in contact with the test specimen, the moving speed of a wheel-loaded power device and a horizontal power device is set, the wheel-loaded power device and the movable plate power device are started, and a test is started. The fine-grain asphalt concrete test piece (the second test piece) is used for simulating an asphalt concrete pavement surface layer, and the middle layer test piece (the first test piece) is used for simulating a middle layer arranged between the asphalt concrete pavement surface layer and a base layer (a movable plate and a settlement plate). The method is characterized in that the frequency of wheel load and the action of the movable plate when the middle layer test specimen cracks and cracks penetrate for the first time is recorded, the number and the extension direction of the cracks are observed, the method is used for evaluating the anti-reflection crack performance of the middle layer test specimen, analyzing and comparing the anti-cracking effects of different asphalt pavement middle layer materials, reasonably selecting the type of the middle layer material, and has important significance for delaying the asphalt pavement reflection cracks and prolonging the service life of the pavement.
The sliding device is connected and arranged on the sliding rod, and when the wheel-mounted power device is started, the whole vertical wheel-mounted device moves left and right on the sliding rod, so that the rolling effect of wheels on the road surface is simulated.
The test wheel telescopic device is used for controlling the test wheel to stretch up and down, when a test is started, the test wheel telescopic device is contracted downwards, the test wheel is contacted with a test piece, the test is started, when the test is finished, the test wheel telescopic device is extended upwards, and the test wheel is lifted from the surface of the test piece.
The reserved seam is arranged between the moving plate and the settling plate and is used for simulating a seam generated by the semi-rigid base layer; the sliding wheels arranged at the lower part of the moving plate can slide left and right on the base platform relative to the settling plate and are used for simulating the stretching effect of the temperature change on the cracked semi-rigid base layer; and the spring is arranged at the lower part of the settlement plate and is used for simulating the uneven settlement of the roadbed.
The heating device is used for heating the case to meet the requirements of different environmental temperatures, and the temperature sensor is used for sensing the temperature in the case.
Furthermore, the contact surfaces among the middle layer test specimen, the fine particle type asphalt concrete specimen, the moving plate and the settling plate are coated with adhesives.
Furthermore, an isolation net is arranged between the temperature adjusting device and the wheel-mounted device. The isolation net is used for isolating the heating device to prevent the tester from touching the heating device and being scalded.
Furthermore, the reserved seam is 5-10 mm.
Further, the test wheel is a rubber test wheel. For simulating a rolled tire.
Further, the horizontal power device is used for controlling the moving plate to move left and right, adjusting the moving speed and recording the moving times; the wheel-load power device is used for controlling the left and right movement of the wheel-load device, adjusting the movement rate and recording the wheel-load rolling times.
Furthermore, the bottom of the case is provided with universal wheels. The movement of the whole testing device is convenient.
Furthermore, the case is made of aluminum alloy materials.
Furthermore, the base, the moving plate and the settling plate are all made of stainless steel materials. The stainless steel base provides a stable test platform for simulation test. Stainless steel moving and settling plates were used to simulate the semi-rigid base course of asphalt pavement.
Further, the loading test blocks are composed of test blocks with different weights. The loading test block can be added with test blocks with different weights according to the needs so as to meet the needs of different load sizes.
Further, the first test piece and the second test piece are both made of an asphalt mixture wheel mill.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the testing device can simulate temperature type (open type) reflection cracks from the horizontal direction and load type (shear type) reflection cracks from the vertical direction, can simulate the actual generation and expansion of semi-rigid base asphalt pavement to be truly close, analyzes and compares the anti-cracking effects of different asphalt pavement intermediate layer materials, reasonably selects the type of the intermediate layer materials, and has important significance for delaying the asphalt pavement reflection cracks and prolonging the service life of the pavement.
The method is simple and convenient to operate, can simulate the real asphalt pavement reflection crack propagation condition, and has real and reliable test data.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic plan view of the present invention;
FIG. 2 is a schematic view of a wheel-mounted structure;
fig. 3 is a side view of the wheel-mounted structure.
Reference numbers and corresponding part names in the drawings:
the method comprises the following steps of 1-a case, 2-a base, 3-a settling plate, 4-a test piece card, 5-a middle layer test piece, 6-a fine particle type asphalt concrete test piece, 7-a reserved seam, 8-a binder, 9-a moving plate, 10-a horizontal power device, 11-a wheel-mounted power device, 12-a loading test block, 13-a test wheel expansion device, 14-a connecting platform, 15-a sliding rod, 16-a sliding device, 17-a test wheel, 18-a temperature sensor, 19-an isolation net, 20-a heating device and 21-a universal wheel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
The present embodiment 1 is an intermediate-layer-provided bituminous pavement reflection crack propagation simulation test apparatus, as shown in fig. 1, fig. 2, and fig. 3, and specifically includes an external chassis 1, a bituminous pavement simulation platform, a wheel load device, and a temperature adjustment device. The asphalt pavement simulation platform comprises a base 2 connected with the bottom of a case, a movable plate 9 and a settlement plate 3 are mounted on the base, and a horizontal power device 10 is mounted on the movable plate. The wheel-mounted device comprises a rubber test wheel 17, a sliding device 16, a sliding rod 15, a connecting platform 14, a test wheel telescopic device 13, a loading test block 12 and the like, and a wheel-mounted power device 11 is connected to the wheel-mounted device. The device can simulate temperature type open type reflection cracks in the horizontal direction and load type shear type reflection cracks in the vertical direction, and can simulate real approaching to actual reflection cracks of semi-rigid base asphalt pavement.
The case 1 is made of aluminum alloy materials, and universal wheels 21 are arranged at the bottom of the case, so that the whole device can move conveniently.
The base 2 is made of stainless steel materials, and a stable test platform is provided for a simulation test.
The moving plate 9 and the settling plate 3 are used for simulating a semi-rigid base layer of the asphalt pavement and are made of stainless steel materials. A reserved seam 7 with the thickness of 5-10 mm is arranged between the moving plate 9 and the settling plate 3 and is used for simulating a seam generated by a semi-rigid base layer; the lower part of the moving plate 9 is provided with a sliding wheel which can slide left and right on the platform of the base 2 relative to the sedimentation plate 3 and is used for simulating the stretching effect of the temperature change on the cracked semi-rigid base layer; the lower part of the settlement plate 3 is provided with a spring which is used for simulating the uneven settlement of the roadbed.
The moving plate power device 10 is used for controlling the left and right movement of the moving plate 9, and can adjust the size of the moving speed and record the moving times.
The middle layer test specimen 5 and the fine particle type asphalt concrete specimen 6 are both made of an asphalt mixture wheel mill, and the middle layer specimen, the two steel plate moving plates and the settlement plate, and the middle layer specimen and the fine particle type asphalt concrete specimen are bonded by a binder 8.
The test piece card 4 is used for fixing a test piece.
The sliding device 16 is connected to the sliding rod 15, and when the wheel-mounted power device is started, the whole vertical wheel-mounted device moves left and right on the sliding rod, so that the rolling effect of wheels on the road surface is simulated.
The test wheel telescoping device 13 is used for controlling the up-and-down telescoping of the test wheel 17, when the test is started, the test wheel telescoping device 13 extends downwards, the test wheel 17 is in contact with the test piece 5, the test is started, when the test is finished, the test wheel telescoping device 13 is retracted upwards, and the test wheel 17 is lifted from the surface of the test piece 5.
The loading test block 12 can be added with test blocks with different weights as required to meet the requirements of different load sizes.
The wheel-load power device 11 is used for controlling the left and right movement of the whole wheel-load device, and can adjust the movement rate and record the wheel-load rolling times according to the requirements.
The heating device 20 is used to heat the cabinet to meet the requirements of different ambient temperatures.
The temperature sensor 18 is used for sensing the temperature in the cabinet.
The isolation net 19 is used for isolating the heating device 20 to prevent the tester from touching the heating device and being scalded.
The specific use method of the embodiment is as follows: firstly, an asphalt mixture wheel mill instrument is adopted to form a middle layer test specimen 5 and a fine particle type asphalt concrete specimen 6, the two specimens are bonded together by using a bonding agent 8, then the bonded two specimens are bonded on a movable plate 9 and a settlement plate 3, a reserved seam 7 with the thickness of 5-10 mm is reserved between the movable plate 9 and the settlement plate 3, the whole specimen is fixed by using a specimen card 4, the size of a loading specimen 12 is set, a test wheel expansion device 13 is adjusted, a test wheel 17 is contacted with the test specimen 5, the moving speed of a wheel-mounted power device and a movable plate power device is set, the wheel-mounted power device and the movable plate power device are started, and the test is started. And recording the first occurrence of cracks and the frequency of the action of the wheel load and the moving plate when the cracks penetrate through the middle layer test specimen 5, observing the number and the extension direction of the cracks, evaluating the anti-reflection crack performance of the middle layer test specimen, analyzing and comparing the anti-cracking effect of the middle layer materials of different asphalt pavements, and reasonably selecting the types of the middle layer materials.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The asphalt pavement reflection crack propagation simulation test device provided with the middle layer is characterized by comprising a case (1), an asphalt pavement simulation platform, a wheel load device and a temperature regulating device, wherein the asphalt pavement simulation platform, the wheel load device and the temperature regulating device are sequentially arranged in the case (1) from bottom to top;
the bituminous pavement simulation platform comprises a base (2), a movable plate (9), a settlement plate (3), a horizontal power device (10) connected with the movable plate (9) and a test piece card (4) used for fixing a test piece, wherein the movable plate (9) and the settlement plate (3) are positioned on the same plane and are both arranged on the top surface of the base (2), a sliding wheel is arranged between the movable plate (9) and the base (2), and the horizontal power device (10) is used for controlling the movable plate (9) to move left and right, adjusting the moving rate of the movable plate (9) and recording the moving times of the movable plate (9);
a spring is arranged between the sedimentation plate (9) and the base (2), a reserved seam (7) is arranged between the movable plate (9) and the sedimentation plate (3), one part of the test piece card (4) is arranged at the top of the movable plate (9), the other part of the test piece card (4) is arranged at the top of the sedimentation plate (3), a test piece fixed in the middle of the test piece card (4) comprises a first test piece (5) and a second test piece (6) which are sequentially arranged from bottom to top, the first test piece is a middle layer test piece, and the second test piece is a fine grain type asphalt concrete test piece;
the wheel-mounted device comprises a loading test block (12), a test wheel telescopic device (13), a connecting platform (14), a sliding device (16) and a test wheel (17) which are sequentially connected from top to bottom, wherein a sliding rod (15) is arranged on the sliding device (16), the connecting platform (14) is connected with a wheel-mounted power device (11), the test wheel telescopic device (13) is used for controlling the test wheel (17) to contact with or be far away from the first test piece (6), and the wheel-mounted power device (11) is used for controlling the wheel-mounted device to move left and right, adjusting the moving rate of the wheel-mounted device and recording the wheel-mounted rolling times;
the temperature regulating device comprises a heating device (20) and a temperature sensor (18).
2. The asphalt pavement reflection crack propagation simulation test device provided with the middle layer as claimed in claim 1, wherein the contact surfaces between the middle layer test specimen (5), the fine grain asphalt concrete specimen (6), the moving plate (9) and the settlement plate (3) are coated with an adhesive (8).
3. The asphalt pavement reflection crack propagation simulation test device provided with the intermediate layer as claimed in claim 1, wherein an isolation net (19) is arranged between the temperature regulation device and the wheel-mounted device.
4. The asphalt pavement reflection crack propagation simulation test device provided with the middle layer as claimed in claim 1, wherein the reserved crack (7) is 5-10 mm.
5. The asphalt pavement reflection crack propagation simulation test device provided with the intermediate layer as claimed in claim 1, wherein the test wheel (17) is a rubber test wheel.
6. The asphalt pavement reflection crack propagation simulation test device provided with the middle layer as claimed in claim 1, wherein the bottom of the case (1) is provided with universal wheels (21).
7. The asphalt pavement reflection crack propagation simulation test device provided with the middle layer as claimed in claim 1, wherein the case (1) is made of an aluminum alloy material.
8. The asphalt pavement reflection crack propagation simulation test device provided with the middle layer as claimed in claim 1, wherein the base (2), the moving plate (9) and the settlement plate (3) are made of stainless steel.
9. The asphalt pavement reflection crack propagation simulation test device provided with the intermediate layer as claimed in claim 1, wherein the loading test block (12) is composed of test blocks of different weights.
10. The bituminous pavement reflection crack propagation simulation test device provided with the intermediate layer according to claim 1, wherein the first test piece (5) and the second test piece (6) are both made of an asphalt mixture wheel mill.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010565094.2A CN111579400A (en) | 2020-06-19 | 2020-06-19 | Asphalt pavement reflection crack propagation simulation test device with middle layer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010565094.2A CN111579400A (en) | 2020-06-19 | 2020-06-19 | Asphalt pavement reflection crack propagation simulation test device with middle layer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112684157A (en) * | 2020-11-30 | 2021-04-20 | 重庆大学 | Asphalt pavement adhesive layer performance testing device |
| CN112881217A (en) * | 2021-01-19 | 2021-06-01 | 东南大学 | Improved asphalt mixture rutting experimental device and experimental method |
| CN113376037A (en) * | 2021-06-08 | 2021-09-10 | 宜昌砼富公路养护有限公司 | Test method and test device for simulating pavement reflection cracks |
| CN113567072A (en) * | 2021-04-30 | 2021-10-29 | 东南大学 | Simulation experiment device and method for bridge expansion joint crack propagation |
| CN113588931A (en) * | 2021-08-03 | 2021-11-02 | 山东高速股份有限公司 | Top-down type pavement crack model based on indoor test and evaluation method thereof |
| CN116929878A (en) * | 2023-07-21 | 2023-10-24 | 燕山大学 | Multi-working-condition-simulating asphalt pavement coupling damage device |
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| CN112684157A (en) * | 2020-11-30 | 2021-04-20 | 重庆大学 | Asphalt pavement adhesive layer performance testing device |
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| CN113588931B (en) * | 2021-08-03 | 2022-06-07 | 山东高速股份有限公司 | Top-down type pavement crack model based on indoor test and evaluation method thereof |
| CN116929878A (en) * | 2023-07-21 | 2023-10-24 | 燕山大学 | Multi-working-condition-simulating asphalt pavement coupling damage device |
| CN116929878B (en) * | 2023-07-21 | 2024-04-02 | 燕山大学 | Multi-working-condition-simulating asphalt pavement coupling damage device |
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