CN109060571A - A kind of accelerated loading abrasion test instrument for Pavement Skid Resistance functional layer wear-resisting property - Google Patents
A kind of accelerated loading abrasion test instrument for Pavement Skid Resistance functional layer wear-resisting property Download PDFInfo
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- CN109060571A CN109060571A CN201810619036.6A CN201810619036A CN109060571A CN 109060571 A CN109060571 A CN 109060571A CN 201810619036 A CN201810619036 A CN 201810619036A CN 109060571 A CN109060571 A CN 109060571A
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- 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
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Abstract
The invention belongs to technical field of highway maintenance technology, and in particular to a kind of Pavement Skid Resistance functional layer wear-resisting property accelerated loading abrasion test instrument.Its technical solution includes abrasion wheel mechanism 1, abrasion wheel control mechanism 2, abrasion test specimen 3, test platform 4, driving mechanism 5；Abrasion wheel mechanism 1 is installed on the inside of abrasion wheel control mechanism 2, and abrasion test specimen 3 is fixed on the inside of experiment porch 4, and the driving mechanism 5 is fixed on the bottom centre of test platform 4 by drive shaft 5-4；Abrasion test specimen locating slot 4-1 is offered on test platform 4, the abrasion test specimen 3 is placed in abrasion test specimen locating slot 4-1, and fixes by wearing away test piece fixing device 4-2；The center of abrasion test specimen locating slot 4-1 is overlapped with the center of circle of experiment porch 4, the center of circle of experiment porch 4 and the central coaxial of the wheel shaft 1-3 in abrasion wheel mechanism 1, and can be rotated around its center of circle.The present invention has the advantages that being capable of the simple, fast wear-resisting property for judging Pavement Skid Resistance functional layer.
Description
Technical field
The invention belongs to technical field of highway maintenance technology, and in particular to a kind of Pavement Skid Resistance functional layer wear-resisting property accelerated loading
Abrasion test instrument.
Background technique
The technologies such as traditional road maintenance method, including mist sealing, slurry seal and micro-surface area are mostly used polymeric liquid etc.
The pavement material road pavement collectively constituted of gathering materials with antiskid carries out enveloping treatment of mating formation, and forms a layer thickness in road surface and is less than
The antiskid function layer of 30mm, to restore the antiskid function on road surface, extend the service life on road surface.Road surface overlays antiskid function layer
Processing mode is simple and easy, and save the cost has broad application prospects.
The characteristics of road surfaces antiskid function layer is that pavement thickness is very thin, surface is very coarse.Antiskid function layer is mated formation completion
The wearability on the coefficient of friction for improving road surface and road surface is directly received afterwards longitudinal direction of car load, side-friction effect and
Temperature, sunlight, oxygen, the erosion of the weather conditions such as moisture, protect the integrality on original road surface.In actual use, prevent
The wear-resisting property of sliding functional layer will directly determine its using effect and service life.
Currently, there is no unified standard and detection devices for the domestic performance detection to antiskid function layer." highway engineering drip
Green and Asphalt Mixture Experiment regulation " in JTJ 052-2000, it is resistance to detect that Wet track abrasion test is specified for slurry seal
Performance is ground, with standard bistrique mill 5 minutes, measures the abrasion loss of test specimen.However, the purpose of the test is determining reasonable pitch
Dosage, and evaluated not directed to the service performance of antiskid function layer, result also only plays the design of slurry mixture
Directive function can accurately not reflect a kind of reality in road surface preventive maintenance of the slurry seal as antiskid function layer
Service performance.Wuhan University of Technology deliver about in " research of thin layer epoxy antiskid pavement material accelerating and loading test ", design
A kind of reciprocating road surfaces anti-slip pavement material loosely falls an analog detection method and its test equipment, passes through simulation tire pair
Antiskid function layer longitudinal loading and side-friction measure polish resistant aggregate after rolling repeatedly and fall situation, anti-skidding to judge
The service performance of functional layer.But due to the limitation in design, which can only be tested under low speed and normal load, nothing
Method reaches accelerated loading, quickly judges the purpose of road surfaces anti-slip pavement materials'use performance.Domestic and international existing accelerated loading
Equipment is all large scale equipment, such as the LCPC circuit of Nantes, France is maximum circuit equipment in the world.Circuit in this equipment
Diameter 30m, bypass road diameter 40m are loaded with a four arm loading systems.It is 0~105km/h load for test speed is uniaxial
Two-wheel, load can apply 80~150KN of uniaxial load.This large scale equipment is mainly used for existing by controlling wheel load in a short time
The effect of road surface structare layer determines the controllable response for accelerating accumulative equivalent axles to act on lower road surface and operation situation.Equipment manufacturing cost
Height, use, maintenance are more difficult, the detection to antiskid function layer performance are not particularly suited for, as laboratory quantitative test equipment
Also undesirable.
Under existing technology and appointed condition, there is no dedicated surface anti-skidding functional layers of satisfying the need to carry out accelerated loading abrasion
Experimental rig simulate the influence of tire road pavement antiskid function layer, and then quickly judge the wear-resisting of Pavement Skid Resistance functional layer
Performance.
Summary of the invention
The purpose of the present invention is for solve the prior art under the conditions of can not quickly judge the wear-resisting of Pavement Skid Resistance functional layer
The problem of performance, and a kind of accelerated loading abrasion test instrument for Pavement Skid Resistance functional layer wear-resisting property is provided.
To achieve the above object, the technical scheme adopted by the invention is that, one kind being used for Pavement Skid Resistance functional layer wearability
The accelerated loading abrasion test instrument of energy, characterized in that including abrasion wheel mechanism 1, abrasion wheel control mechanism 2, wear away test specimen 3, examination
Test platform 4, driving mechanism 5；Described abrasion wheel mechanism 1 is installed on the inside of abrasion wheel control mechanism 2, and with abrasion test specimen
3 tested face contact；The abrasion test specimen 3 is fixed on the inside of experiment porch 4, and wears away the tested of test specimen 3 and face upward, institute
The driving mechanism 5 stated is fixed on the bottom centre of test platform 4 by drive shaft 5-4；It is offered on the test platform 4
Test specimen locating slot 4-1 is worn away, the abrasion test specimen 3 is placed in abrasion test specimen locating slot 4-1, and passes through the fixed dress of abrasion test specimen
4-2 is set to fix；The center of the abrasion test specimen locating slot 4-1 is overlapped with the center of circle of experiment porch 4, can place 4 abrasion
Test specimen 3；The center of circle of experiment porch 4 and the central coaxial of the wheel shaft 1-3 in abrasion wheel mechanism 1, and can be rotated around its center of circle.
Abrasion wheel mechanism 1 is made of tire 1-1, brake apparatus 1-2, wheel shaft 1-3 and fixing bolt 1-4；Described
Brake apparatus 1-2 is located at the inside of tire 1-1, can control the speed of tire 1-1；Fixing bolt 1-4 is installed on wheel shaft
The both ends of 1-3；Tire 1-1 can pass through fixing bolt 1-4 dismounting and change.
The abrasion wheel control mechanism 2 is by control mechanism bracket 2-1, control mechanism crossbeam 2-2, bracket fixing support 2-
3 and pressure loading device 2-4 composition: the control mechanism bracket 2-1 is located at the upper surface of bracket fixing support 2-3, described
Bracket fixing support 2-3 is fixed by bolts in ground；The control mechanism crossbeam 2-2 is set up in control mechanism bracket 2-1
Upper end；The lower central of control mechanism crossbeam 2-2, the pressure are fixed in the upper surface of the pressure loading device 2-4
The center of telescopic rod and the wheel shaft 1-3 in abrasion wheel mechanism 1 in force loading device 2-4 is fixed.
The driving mechanism 5 is by driving mechanism cabinet 5-1, adjustable speed driving motor 5-2, speed reducer 5-3, drive shaft 5-
4, cabinet fixing support 5-5 is formed；The adjustable speed driving motor 5-2, speed reducer 5-3, drive shaft 5-4 are respectively positioned on driving machine
The inside of structure cabinet 5-1, the upper end of the drive shaft 5-4 pass through the bottom that driving mechanism cabinet 5-1 is fixed on test sample platform 4
The input terminal at center, speed reducer 5-3 is connect with the output end of adjustable speed driving motor 5-2, and adjustable speed driving motor 5-2 is fixed on
The bottom of driving mechanism cabinet 5-1, driving mechanism cabinet 5-1 are fixed on ground by cabinet fixing support 5-5.
Preferably, the abrasion test specimen 3 is long 300mm × square cement plate of wide 300mm × thickness 7mm or pitch coagulation
Native plate, a side surface are coated with the antiskid function layer of 1~2mm.
Preferably, the test platform 4 is horizontally disposed round steel platform；The abrasion test specimen locating slot 4- opened up
1 is long 600mm × wide 600mm × depth 8mm square indentations.
Preferably, the tire 1-1 is the natural rubber tire of diameter 200mm, and the distance between two tires are
424mm。
Preferably, the brake apparatus 1-2 is disc brake.
The present invention, which takes turns abrasion by hydraulic or mechanical device, applies longitudinal pressure, and then acts on abrasion surface of test piece
Antiskid function layer, simulating vehicle load influence the longitudinal pressure of antiskid function layer；Driving mechanism drives test platform rotation, with
Brake apparatus cooperation makes abrasion wheel form relative motion with abrasion surface of test piece, and tire is to anti-skidding in simulating vehicle driving process
The lateral of functional layer influences.By the influence in accelerated loading abrasion test condition Imitating tire road pavement antiskid function layer,
Quickly judge the wear-resisting property of Pavement Skid Resistance functional layer.Compared to traditional abrasion test instrument, present invention existence conditions indoors
Under, maximum simulated roadway actual conditions, to the shadow of the wear-resisting property of antiskid function layer in big load, high speed traveling
Sound makes quick and objective judge.Therefore, compared with prior art, the present invention have can simple, fast judges road surface prevent
The advantages of wear-resisting property of sliding functional layer.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is abrasion wheel control mechanism structure side position schematic diagram of the invention；
Fig. 3 is the structural schematic diagram of abrasion wheel mechanism of the invention；
Fig. 4 is the structural schematic diagram of test platform of the invention.
Specific embodiment
Below with reference to the drawings and specific embodiments, the present invention is described in further detail:
As shown in Figure 1, a kind of accelerated loading abrasion for Pavement Skid Resistance functional layer wear-resisting property described in the present embodiment
Tester, wherein including abrasion wheel mechanism 1, abrasion wheel control mechanism 2, abrasion test specimen 3, test platform 4, driving mechanism 5；Institute
The abrasion wheel mechanism 1 stated is installed on the inside of abrasion wheel control mechanism 2, and the tested face contact with abrasion test specimen 3；Described
Abrasion test specimen 3 is fixed on the inside of experiment porch 4, and wears away the tested of test specimen 3 and face upward, and the driving mechanism 5 passes through drive
Moving axis 5-4 is fixed on the bottom centre of test platform 4；Abrasion test specimen locating slot 4-1 is offered on the test platform 4,
The abrasion test specimen 3 is placed in abrasion test specimen locating slot 4-1, and is fixed by wearing away test piece fixing device 4-2；Such as Fig. 4 institute
Show, the center of the abrasion test specimen locating slot 4-1 is overlapped with the center of circle of experiment porch 4, can place 4 abrasion test specimens 3；It is real
The center of circle of platform 4 and the central coaxial of the wheel shaft 1-3 in abrasion wheel mechanism 1 are tested, and can be rotated around its center of circle.The test is flat
Platform 4 is horizontally disposed round steel platform；Abrasion test specimen locating slot 4-1 is long 600mm × wide 600mm × depth 8mm pros
Connected in star.
As shown in figure 3, abrasion wheel mechanism 1 is by tire 1-1, brake apparatus 1-2, wheel shaft 1-3 and fixing bolt 1-4 group
At；Tire 1-1 is the natural rubber tire of diameter 200mm, and the brake apparatus 1-2 is disc brake, is located at tire 1-1's
Inside can control the speed of tire 1-1；Fixing bolt 1-4 is installed on the both ends of wheel shaft 1-3；Between two tires away from
Fixing bolt 1-4 dismounting and change can be passed through from for 424mm, tire 1-1.It is acted on abrasion test specimen 3 by tire 1-11, simulation
Car load generates longitudinal influence to antiskid function layer.Brake apparatus 1-2 is that abrasion wheel 1 provides brake force, when this brake force
When equal to 0, the side-friction of the driven wheel of simulated automotive to antiskid function layer；When 0 < brake force < maximum braking force is (maximum
Tire will be by locking under brake force) when, to the side-friction of antiskid function layer under the driving wheel acceleration mode of simulated automotive；When
When brake force is equal to maximum braking force, side-friction of the wheel to antiskid function layer under emergency braking condition is simulated in tire locking
Power.
As shown in Fig. 2, the abrasion wheel control mechanism 2 is by control mechanism bracket 2-1, control mechanism crossbeam 2-2, bracket
Fixing support 2-3 and pressure loading device 2-4 composition: the control mechanism bracket 2-1 is located at the upper of bracket fixing support 2-3
Face, the bracket fixing support 2-3 are fixed by bolts in ground；The control mechanism crossbeam 2-2 is set up in control machine
The upper end of structure bracket 2-1；The lower central of control mechanism crossbeam 2-2 is fixed in the upper surface of the pressure loading device 2-4,
The center of telescopic rod and the wheel shaft 1-3 in abrasion wheel mechanism 1 in the pressure loading device 2-4 is fixed, and can be taken turns to abrasion
The wheel shaft 1-3 of mechanism 1 applies a pressure vertically downward, and the wheel load for making tire 1-1 be applied to abrasion 3 surface of test specimen reaches 0
~2MPa, by pressure sensor to the pressure measurement exported.
The driving mechanism 5 is by driving mechanism cabinet 5-1, adjustable speed driving motor 5-2, speed reducer 5-3, drive shaft 5-
4, cabinet fixing support 5-5 is formed；The adjustable speed driving motor 5-2, speed reducer 5-3, drive shaft 5-4 are respectively positioned on driving machine
The inside of structure cabinet 5-1, the upper end of the drive shaft 5-4 pass through the bottom that driving mechanism cabinet 5-1 is fixed on test sample platform 4
The input terminal at center, speed reducer 5-3 is connect with the output end of adjustable speed driving motor 5-2, and adjustable speed driving motor 5-2 is fixed on
The bottom of driving mechanism cabinet 5-1, driving mechanism cabinet 5-1 are fixed on ground by cabinet fixing support 5-5.For abrasion examination
It tests instrument and power output is provided, speed reducer 5-3 is driven by internal adjustable speed driving motor 5-2, pass through drive shaft 5-4 band dynamic test
Platform 4 is rotated around center, and then makes tire 1-1 and abrasion test specimen 3 that relative motion occur, and cooperates brake apparatus 1-2 simulating vehicle
Traveling on the way influences the transverse direction of antiskid function layer.The abrasion test specimen 3 is long 300mm × wide 300mm × thickness 7mm pros
Shape cement plate or bituminous concrete plate, a side surface are coated with the antiskid function layer of 1~2mm.
It enumerates using the setting of experimental condition of accelerated loading abrasion test instrument of the present invention, the operating of instrument and experiment knot
The test method of the judge of fruit is as follows:
Test method 1
Abrasion test specimen is long 300mm × square cement plate of wide 300mm × thickness 7mm, is uniformly paved one layer on its surface
The antiskid function layer of 1mm thickness.It is flat that four pieces of abrasion test specimens can all be fixed on experiment by abrasion test piece fixing device after placing
On platform.
Pressure loading device in abrasion wheel control mechanism selects hydraulic device, passes through the biography of the tire of abrasion wheel mechanism
It leads, the pressure acted on abrasion test specimen is 0.5MPa.
By the drive of driving mechanism, test platform will be rotated around the center of circle, and then make tire and the abrasion of abrasion wheel mechanism
Relative motion occurs for test specimen, and wearing away the relative velocity between test specimen and tire is 10km/h.
Abrasion test specimen is set as 5 minutes, i.e., the abrasion situation of the antiskid function layer of observation in every 5 minutes records in time.Directly
There is situations such as cracking, show-through to abrasion to antiskid function layer.
Test method 2
Abrasion test specimen is long 300mm × square cement plate of wide 300mm × thickness 7mm, is uniformly paved one layer on its surface
The antiskid function layer of 2mm thickness.It is flat that four pieces of abrasion test specimens can all be fixed on experiment by abrasion test piece fixing device after placing
On platform.
Pressure loading device in abrasion wheel control mechanism selects hydraulic device, is conducted by the tire of abrasion wheel mechanism,
The pressure acted on abrasion test specimen is 0.5MPa.
By the drive of driving mechanism, test platform will be rotated around the center of circle, and then make tire and the abrasion of abrasion wheel mechanism
Relative motion occurs for test specimen, and wearing away the relative velocity between test specimen and tire is 60km/h.
Abrasion test specimen is set as 2 minutes, i.e., the abrasion situation of the antiskid function layer of observation in every 2 minutes records in time.Directly
There is situations such as cracking, show-through to abrasion to antiskid function layer.
Test method 3
Abrasion test specimen is long 300mm × square cement plate of wide 300mm × thickness 7mm, is uniformly paved one layer on its surface
The antiskid function layer of 2mm thickness.It is flat that four pieces of abrasion test specimens can all be fixed on experiment by abrasion test piece fixing device after placing
On platform.
Pressure loading device in abrasion wheel control mechanism selects hydraulic device, is conducted by the tire of abrasion wheel mechanism,
The pressure acted on abrasion test specimen is 1.0MPa.
By the drive of driving mechanism, test platform will be rotated around the center of circle, and then make tire and the abrasion of abrasion wheel mechanism
Relative motion occurs for test specimen, and wearing away the relative velocity between test specimen and tire is 10km/h.
Abrasion test specimen is set as 2 minutes, i.e., the abrasion situation of the antiskid function layer of observation in every 2 minutes records in time.Directly
There is situations such as cracking, show-through to abrasion to antiskid function layer.
Claims (8)
1. a kind of accelerated loading abrasion test instrument for Pavement Skid Resistance functional layer wear-resisting property, characterized in that taken turns including abrasion
Mechanism (1), abrasion wheel control mechanism (2), abrasion test specimen (3), test platform (4), driving mechanism (5)；The abrasion turbine
Structure (1) is installed on the inside of abrasion wheel control mechanism (2), and the tested face contact with abrasion test specimen (3)；The abrasion examination
Part (3) is fixed on the inside of experiment porch (4), and wears away the tested of test specimen (3) and face upward, and the driving mechanism (5) passes through
Drive shaft (5-4) is fixed on the bottom centre of test platform (4)；It is fixed that abrasion test specimen is offered on the test platform (4)
Position slot (4-1), the abrasion test specimen (3) are placed in abrasion test specimen locating slot (4-1), and pass through abrasion test piece fixing device
(4-2) is fixed；The center of the abrasion test specimen locating slot (4-1) is overlapped with the center of circle of experiment porch (4), can place (4)
A abrasion test specimen (3)；The central coaxial in the center of circle of experiment porch (4) and the wheel shaft (1-3) in abrasion wheel mechanism (1), and can be around
The rotation of its center of circle.
2. a kind of accelerated loading abrasion test instrument for Pavement Skid Resistance functional layer wear-resisting property according to claim 1,
It is characterized in that abrasion wheel mechanism (1) is by tire (1-1), brake apparatus (1-2), wheel shaft (1-3) and fixing bolt (1-4)
Composition；The brake apparatus (1-2) is located at the inside of tire (1-1), can control the speed of tire (1-1)；It is fixed
Bolt (1-4) is installed on the both ends of wheel shaft (1-3)；Tire (1-1) can pass through fixing bolt (1-4) dismounting and change.
3. a kind of accelerated loading abrasion test instrument for Pavement Skid Resistance functional layer wear-resisting property according to claim 1,
It is characterized in that the abrasion wheel control mechanism (2) is solid by control mechanism bracket (2-1), control mechanism crossbeam (2-2), bracket
Determine pedestal (2-3) and pressure loading device (2-4) composition: the control mechanism bracket (2-1) is located at bracket fixing support (2-
The upper surface of 3), the bracket fixing support (2-3) is fixed by bolts in ground；Described control mechanism crossbeam (2-2) frame
Set on the upper end of control mechanism bracket (2-1)；Control mechanism crossbeam is fixed in the upper surface of the pressure loading device (2-4)
The lower central of (2-2), the wheel shaft (1-3) in telescopic rod and abrasion wheel mechanism (1) in the pressure loading device (2-4)
Center fix.
4. a kind of accelerated loading abrasion test instrument for Pavement Skid Resistance functional layer wear-resisting property according to claim 1,
It is characterized in that the driving mechanism (5) is by driving mechanism cabinet (5-1), adjustable speed driving motor (5-2), speed reducer (5-
3), drive shaft (5-4), cabinet fixing support (5-5) composition；The adjustable speed driving motor (5-2), drives speed reducer (5-3)
Moving axis (5-4) is respectively positioned on the inside of driving mechanism cabinet (5-1), and the upper end of the drive shaft (5-4) passes through driving mechanism case
Body (5-1) is fixed on the bottom centre of test sample platform (4), input terminal and adjustable speed driving motor (5-2) of speed reducer (5-3)
Output end connection, adjustable speed driving motor (5-2) are fixed on the bottom of driving mechanism cabinet (5-1), driving mechanism cabinet (5-1)
Ground is fixed on by cabinet fixing support (5-5).
5. a kind of accelerated loading abrasion test instrument for Pavement Skid Resistance functional layer wear-resisting property according to claim 1,
Abrasion test specimen (3) are long 300mm × square cement plate of wide 300mm × thickness 7mm or bituminous concrete plate, a side surface
It is coated with the antiskid function layer of 1~2mm.
6. a kind of accelerated loading abrasion test instrument for Pavement Skid Resistance functional layer wear-resisting property according to claim 1,
It is characterized in that the test platform (4) is horizontally disposed round steel platform；The abrasion test specimen locating slot 4-1 opened up is
Long 600mm × wide 600mm × depth 8mm square indentations.
7. a kind of accelerated loading abrasion test instrument for Pavement Skid Resistance functional layer wear-resisting property according to claim 2,
It is characterized in that the tire (1-1) is the natural rubber tire of diameter 200mm, and the distance between two tires are 424mm.
8. a kind of accelerated loading abrasion test instrument for Pavement Skid Resistance functional layer wear-resisting property according to claim 1,
It is characterized in that the brake apparatus (1-2) is disc brake.
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| CN201810619036.6A CN109060571A (en) | 2018-06-08 | 2018-06-08 | A kind of accelerated loading abrasion test instrument for Pavement Skid Resistance functional layer wear-resisting property |
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|---|---|---|---|
| CN201810619036.6A CN109060571A (en) | 2018-06-08 | 2018-06-08 | A kind of accelerated loading abrasion test instrument for Pavement Skid Resistance functional layer wear-resisting property |
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| CN109632550A (en) * | 2018-12-24 | 2019-04-16 | 长安大学 | A kind of wear hardness comparative test device and test method |
| CN109724893A (en) * | 2019-03-18 | 2019-05-07 | 广东华路交通科技有限公司 | The test device and method of ultra-thin wearing layer endurance quality in a kind of testing tunnel |
| CN111948080A (en) * | 2020-08-25 | 2020-11-17 | 中国市政工程西北设计研究院有限公司 | Device and method for measuring anti-wear performance of aggregate |
| CN112129929A (en) * | 2020-09-30 | 2020-12-25 | 重庆百信实业有限公司 | Method for detecting comprehensive performance of track coating |
| CN113567288A (en) * | 2021-08-18 | 2021-10-29 | 浙江兄弟路标涂料有限公司 | Center distance adjustable abrasion instrument rotating frame assembly |
| CN114047054A (en) * | 2021-11-15 | 2022-02-15 | 中国第一汽车股份有限公司 | Rolling testing device and testing method thereof |
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| CN112129929A (en) * | 2020-09-30 | 2020-12-25 | 重庆百信实业有限公司 | Method for detecting comprehensive performance of track coating |
| CN112129929B (en) * | 2020-09-30 | 2022-11-15 | 重庆百信实业有限公司 | Method for detecting comprehensive performance of track coating |
| CN113567288A (en) * | 2021-08-18 | 2021-10-29 | 浙江兄弟路标涂料有限公司 | Center distance adjustable abrasion instrument rotating frame assembly |
| CN113567288B (en) * | 2021-08-18 | 2024-04-02 | 浙江兄弟路标涂料有限公司 | Center distance adjustable abrasion instrument rotating rack assembly |
| CN114047054A (en) * | 2021-11-15 | 2022-02-15 | 中国第一汽车股份有限公司 | Rolling testing device and testing method thereof |
| CN114047054B (en) * | 2021-11-15 | 2024-03-26 | 中国第一汽车股份有限公司 | Rolling test device and test method thereof |
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