CN110823744A - Loop type small accelerated wear instrument for asphalt pavement and use method thereof - Google Patents
Loop type small accelerated wear instrument for asphalt pavement and use method thereof Download PDFInfo
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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
- G01N3/56—Investigating resistance to wear or abrasion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention relates to an asphalt pavement loop type small accelerated wear instrument and a using method thereof, belonging to the technical field of engineering machinery. Including frame branch, fix bottom plate and the drive arrangement on frame branch, be equipped with the recess on the bottom plate, the test piece can directly be put into in the recess, drive arrangement passes through the chute of frame branch and connects on frame branch, the counter weight rim plate is connected with drive arrangement, experimental wheel locates counter weight rim plate bottom through the axle of different length and constitutes outside experimental wheel and inboard experimental wheel, driving motor and intelligent time control switch electric connection are equipped with the screw rod on the driving motor. The invention has reasonable structure and convenient use, and can better simulate the abrasion condition of the anti-skid structure of the pavement surface when the tire runs on a dry pavement in a single direction under different loading times and loads, thereby obtaining the surface mixture structure type which is more favorable for improving the anti-skid performance of the pavement.
Description
Technical Field
The invention relates to an asphalt pavement loop type small accelerated wear instrument and a using method thereof, belonging to the technical field of engineering machinery.
Background
With the continuous improvement of the quantity of motor vehicles in China, the situation of road traffic driving safety is more severe, although new technologies on related road surfaces are developed gradually, the research work for solving the anti-skid safety performance of the road surfaces has a plurality of defects, the current research on the anti-skid performance of the asphalt road surfaces mostly observes the attenuation condition of the anti-skid value of the asphalt road surfaces by directly analyzing the anti-skid indexes of the anti-skid layers of the asphalt road surfaces or by a back-and-forth rubbing test of a vehicle machine, so that the structural form with better anti-skid performance is selected, but the mode is difficult to simulate the contact and abrasion condition of the wheels on the asphalt road surfaces during the actual driving process, and the attenuation rule of the wheels after different loading times has larger deviation with the actual.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides an asphalt pavement annular type small accelerated wear instrument and a using method thereof.
In order to solve the technical problem, the invention provides an asphalt pavement loop type small accelerated wear instrument which comprises a rack supporting rod 1, a bottom plate 3 and a driving device, wherein the bottom plate 3 is fixed on the rack supporting rod 1, a groove is formed in the bottom plate 3, a test piece 8 is arranged in the groove, and the test piece 8 is an asphalt mixture splicing test piece. The driving device is connected to the rack supporting rod 1 through a chute of the rack supporting rod 1, the counterweight wheel disc 6 is connected with the driving device, and the test wheel is arranged at the bottom of the counterweight wheel disc 6 through shafts with different lengths to form an outer test wheel 2 and an inner test wheel 7; the driving device comprises a motor 5 and a speed reducer 10, the driving motor 5 is electrically connected with an intelligent time control switch 9, an output shaft of the driving motor 5 is connected with the speed reducer, the speed reducer is connected with a counterweight wheel disc 6, and the driving motor 5 is connected with a screw rod 4.
The width of the outer side test wheel 2 and the width of the inner side test wheel 7 are 5cm, the wheel track overlapping part is 5mm during rotation, the abrasion width reaches 9.5cm, and the pendulum type friction meter sliding block (the width is 7.62 cm) can smoothly pass through a wheel track belt.
A use method of an asphalt pavement loop type small accelerated wear instrument comprises the following specific steps:
(1) the working time of the device can be preset according to the type and the performance of the asphalt mixture, a loading cycle can also be set as 2 hours, the abrasion condition of the surface of the test piece is observed after the loading is finished, and then the loading time of the next cycle is determined;
(2) the intelligent time control switch is actuated, the device starts to work, and the rotating speed of the outer side test wheel 2 and the inner side test wheel 7 is set to be 20 r/min;
(3) if the test is performed under the standard load condition (0.7 MPa), the balance weight can be adjusted according to the actual grounding pressure under the outer test wheel 2 and the inner test wheel 7, and the grounding area of the two wheels is converted by adopting the metric paper. As the device adopts the high-density solid rubber wheel, the change of the grounding area of the rubber wheel along with the increase of the load is small through tests, the grounding area is basically maintained between 1120 mm and 1170mm2, the weight of the wheel is about 80kg after the counterweight adjustment, and the grounding pressure of a single wheel is between 0.68MPa and 0.72MPa and is basically consistent with the grounding pressure of a normal vehicle tire on the road surface; if test research under heavy load conditions (usually 0.9MPa and 1.1 MPa) is required, the weights can be respectively adjusted to be about 103kg and 126 kg, and the single-wheel grounding pressure is respectively between 0.88MPa and 0.92MPa and 1.07 MPa and 1.13 MPa;
(4) the method is divided into the following steps according to the condition of the asphalt pavement:
a, when the asphalt pavement is in a wet state, simulating the attenuation law of the anti-skid performance of the asphalt pavement under the condition of heavy rain, selecting three different soaking conditions of soaking 50% MTD, soaking 100% MTD and soaking 100% MTD +3mm for testing, automatically stopping a motor when the specified working time is reached, lifting a driving part through an upper screw, taking out a test piece, and measuring the friction coefficient BPN value after the surface of the test piece is abraded by adopting a pendulum type friction meter;
and b, when the asphalt pavement is in a dry state and the specified working time is reached, automatically stopping the motor, lifting the driving part through the upper screw, taking out the test piece, and measuring the friction coefficient BPN and the construction depth TD of the test piece after the surface of the test piece is worn by using a pendulum type friction meter and a sand paving method respectively.
In the step (3), the tire grounding pressure (0.7 MPa, 0.9MPa, 1.1MPa and the like can be selected) is selected according to different research purposes, and the balance weight is adjusted correspondingly.
The invention has reasonable structure and convenient use, and can better simulate the abrasion condition of the anti-skid structure of the pavement surface when the vehicle runs in one way under different loading times and loading conditions, thereby preferably selecting the surface layer mixture structure type which is more favorable for improving the anti-skid performance of the pavement.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1-rack support rod, 2-outer side test wheel, 3-bottom plate, 4-screw, 5-driving device, 6-counterweight wheel disc, 7-inner side test wheel, 8-test piece, 9-intelligent time control switch and 10-speed reducer.
Detailed Description
The following detailed description of the embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein the technology and products not shown in the embodiments are all conventional products available in the art or commercially.
Example 1: as shown in figure 1, the bituminous pavement loop type small-sized accelerating abrasion tester comprises a rack supporting rod 1, a bottom plate 3 and a driving device, wherein the bottom plate 3 and the driving device are fixed on the rack supporting rod 1, a groove is formed in the bottom plate 3, a test piece 8 is arranged in the groove, and the test piece 8 is a bituminous mixture splicing test piece. The driving device is connected to the rack supporting rod 1 through the chute of the rack supporting rod 1, the counterweight wheel disc 6 is connected with the driving device, and the test wheel is arranged at the bottom of the counterweight wheel disc 6 through shafts with different lengths to form an outer test wheel 2 and an inner test wheel 7. The driving device comprises a motor 5 and a speed reducer 10, the driving motor 5 is electrically connected with an intelligent time control switch 9, an output shaft of the driving motor 5 is connected with the speed reducer, the speed reducer is connected with a counterweight wheel disc 6, and the driving motor 5 is connected with a screw rod 4. The width of the outer side test wheel 2 and the width of the inner side test wheel 7 are 5cm, the wheel track overlapping part is 5mm during rotation, the abrasion width reaches 9.5cm, and the pendulum type friction meter sliding block (the width is 7.62 cm) can smoothly pass through a wheel track belt.
A use method of an asphalt pavement loop type small accelerated wear instrument comprises the following specific steps:
(1) the working time of the device can be preset according to the type and the performance of the asphalt mixture, a loading cycle can also be set as 2 hours, the abrasion condition of the surface of the test piece is observed after the loading is finished, and then the loading time of the next cycle is determined;
(2) the intelligent time control switch is actuated, the device starts to work, and the rotating speed of the outer side test wheel 2 and the inner side test wheel 7 is set to be 20 r/min;
(3) if the test is carried out under the standard load condition of 0.7MPa, the balance weight can be firstly adjusted according to the actual grounding pressure under the outer test wheel 2 and the inner test wheel 7, and the grounding area of the two wheels is converted by adopting the metric paper. As the device adopts the high-density solid rubber wheel, the change of the grounding area of the rubber wheel along with the increase of the load is small through tests, the grounding area is basically maintained between 1120 mm and 1170mm2, the weight of the wheel is about 80kg after the counterweight adjustment, and the grounding pressure of a single wheel is between 0.68MPa and 0.72MPa and is basically consistent with the grounding pressure of a normal vehicle tire on the road surface; if the test research under the heavy load condition of 0.9MPa or 1.1MPa needs to be carried out, the counterweight can be respectively adjusted to be about 103kg or 26 kg, and the single-wheel grounding pressure is respectively between 0.88MPa and 0.92MPa and 1.07 MPa and 1.13 MPa;
(4) when the asphalt pavement is in a wet state, simulating the attenuation law of the anti-skid performance of the asphalt pavement under the rainy condition, selecting three different soaking conditions of 50% MTD, 100% MTD and 100% MTD +3mm for testing, automatically stopping a motor when the specified working time is reached, lifting a driving part through an upper screw, taking out a test piece, and measuring the BPN value of the friction coefficient after the surface of the test piece is abraded by adopting a pendulum type friction meter;
according to different research purposes, the tire grounding pressure can be selected to be 0.7MPa or 0.9MPa or 1.1MPa, and the balance weight adjustment is carried out correspondingly.
Example 2: as shown in figure 1, the bituminous pavement loop type small-sized accelerating abrasion tester comprises a rack supporting rod 1, a bottom plate 3 and a driving device, wherein the bottom plate 3 and the driving device are fixed on the rack supporting rod 1, a groove is formed in the bottom plate 3, a test piece 8 is arranged in the groove, and the test piece 8 is a bituminous mixture splicing test piece. The driving device is connected to the rack supporting rod 1 through a chute of the rack supporting rod 1, the counterweight wheel disc 6 is connected with the driving device, and the test wheel is arranged at the bottom of the counterweight wheel disc 6 through shafts with different lengths to form an outer test wheel 2 and an inner test wheel 7; the driving device comprises a motor 5 and a speed reducer 10, the driving motor 5 is electrically connected with an intelligent time control switch 9, an output shaft of the driving motor 5 is connected with the speed reducer, the speed reducer is connected with a counterweight wheel disc 6, and the driving motor 5 is connected with a screw rod 4. The width of the outer side test wheel 2 and the width of the inner side test wheel 7 are 5cm, the wheel track overlapping part is 5mm during rotation, the abrasion width reaches 9.5cm, and the pendulum type friction meter sliding block (the width is 7.62 cm) can smoothly pass through a wheel track belt.
A use method of an asphalt pavement loop type small accelerated wear instrument comprises the following specific steps:
(1) the working time of the device can be preset according to the type and the performance of the asphalt mixture, a loading cycle can also be set as 2 hours, the abrasion condition of the surface of the test piece is observed after the loading is finished, and then the loading time of the next cycle is determined;
(2) the intelligent time control switch is actuated, the device starts to work, and the rotating speed of the outer side test wheel 2 and the inner side test wheel 7 is set to be 20 r/min;
(3) if the test is carried out under the standard load condition of 0.7MPa, the balance weight can be firstly adjusted according to the actual grounding pressure under the outer test wheel 2 and the inner test wheel 7, and the grounding area of the two wheels is converted by adopting the metric paper. As the device adopts the high-density solid rubber wheel, the change of the grounding area of the rubber wheel along with the increase of the load is small through tests, the grounding area is basically maintained between 1120 mm and 1170mm2, the weight of the wheel is about 80kg after the counterweight adjustment, and the grounding pressure of a single wheel is between 0.68MPa and 0.72MPa and is basically consistent with the grounding pressure of a normal vehicle tire on the road surface; if test research under the heavy load condition of 0.9MPa or 1.1MPa needs to be carried out, the counter weight can be respectively adjusted to be about 103kg and 126 kg, and the single-wheel grounding pressure is respectively between 0.88MPa and 0.92MPa and 1.07 MPa and 1.13 MPa;
(4) and b, when the asphalt pavement is in a dry state and the specified working time is reached, automatically stopping the motor, lifting the driving part through the upper screw, taking out the test piece, and measuring the friction coefficient BPN and the construction depth TD of the test piece after the surface of the test piece is worn by using a pendulum type friction meter and a sand paving method respectively.
According to different research purposes, the tire grounding pressure can be selected to be 0.7MPa or 0.9MPa or 1.1MPa, and the balance weight adjustment is carried out correspondingly.
While the present invention has been described with reference to the accompanying drawings, it is to be understood that the invention is not limited thereto, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. The utility model provides a small-size acceleration wearing and tearing appearance of bituminous paving ring way formula, includes frame branch (1), fixes bottom plate (3) and drive arrangement on frame branch (1), its characterized in that: the test wheel is characterized in that a groove is formed in the bottom plate (3), the test piece (8) is arranged in the groove, the driving device is connected to the rack supporting rod (1) through a chute of the rack supporting rod (1), the counterweight wheel disc (6) is connected with the driving device, and the test wheel is arranged at the bottom of the counterweight wheel disc (6) through shafts with different lengths to form an outer side test wheel (2) and an inner side test wheel (7); the driving device comprises a motor (5) and a speed reducer (10), the driving motor (5) is electrically connected with the intelligent time control switch (9), an output shaft of the driving motor (5) is connected with the speed reducer, the speed reducer is connected with the counterweight wheel disc (6), and the driving motor (5) is connected with the screw rod (4).
2. The asphalt pavement endless track type small accelerated wear instrument according to claim 1, characterized in that: the width of the outer side test wheel (2) and the width of the inner side test wheel (7) are both 5cm, the wheel track superposition part is 5mm during rotation, the abrasion width reaches 9.5cm, and the pendulum type friction instrument sliding block can smoothly pass through a wheel track belt.
3. A method of using the asphalt pavement endless track type small accelerated wear instrument of any one of claims 1 to 2, comprising the steps of:
(1) the working time of the device can be preset according to the type and the performance of the asphalt mixture, a loading cycle can also be set as 2 hours, the abrasion condition of the surface of the test piece is observed after the loading is finished, and then the loading time of the next cycle is determined;
(2) an intelligent time control switch is operated, the device starts to work, and the rotating speed of the outer side test wheel (2) and the inner side test wheel (7) is set to be 20 r/min;
(3) if the test is carried out under the standard load condition, the balance weight can be adjusted according to the actual grounding pressure under the outer side test wheel (2) and the inner side test wheel (7), and the grounding area of the two wheels is converted by adopting the metric paper; as the device adopts the high-density solid rubber wheel, the change of the grounding area of the rubber wheel along with the increase of the load is small through tests, the grounding area is basically maintained between 1120 mm and 1170mm2, the weight of the wheel is about 80kg after the counterweight adjustment, and the grounding pressure of a single wheel is between 0.68MPa and 0.72MPa and is basically consistent with the grounding pressure of a normal vehicle tire on the road surface; if the test research under the heavy-load condition needs to be carried out, the counterweight can be respectively adjusted to be about 103kg or 126 kg, and the single-wheel grounding pressure is respectively 0.88MPa to 0.92MPa and 1.07 MPa to 1.13 MPa;
(4) the method is divided into the following steps according to the condition of the asphalt pavement:
a, when the asphalt pavement is in a wet state, selecting three different soaking conditions of 50% of soaked MTD, 100% of soaked MTD and 100% of soaked MTD +3mm for testing, automatically stopping a motor when specified working time is reached, lifting a driving part through an upper screw, taking out a test piece, and measuring the BPN value of the friction coefficient after the surface of the test piece is abraded by using a pendulum-type friction instrument;
and b, when the asphalt pavement is in a dry state and the specified working time is reached, automatically stopping the motor, lifting the driving part through the upper screw, taking out the test piece, and measuring the friction coefficient BPN and the construction depth TD of the test piece after the surface of the test piece is worn by using a pendulum type friction meter and a sand paving method respectively.
4. Use according to claim 3, characterized in that: and (3) selecting the tire grounding pressure according to different research purposes, and correspondingly adjusting the balance weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911150920.0A CN110823744A (en) | 2019-11-21 | 2019-11-21 | Loop type small accelerated wear instrument for asphalt pavement and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911150920.0A CN110823744A (en) | 2019-11-21 | 2019-11-21 | Loop type small accelerated wear instrument for asphalt pavement and use method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111929186A (en) * | 2020-08-06 | 2020-11-13 | 重庆广播电视大学重庆工商职业学院 | Tire wear performance testing system |
| 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 |
| CN113466073A (en) * | 2021-06-30 | 2021-10-01 | 长安大学 | Conical abrasion instrument and abrasion method |
| CN113607444A (en) * | 2021-07-26 | 2021-11-05 | 燕山大学 | High-speed heavy-duty train wheel rail profile friction wear and rolling contact fatigue test device |
-
2019
- 2019-11-21 CN CN201911150920.0A patent/CN110823744A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111929186A (en) * | 2020-08-06 | 2020-11-13 | 重庆广播电视大学重庆工商职业学院 | Tire wear performance testing system |
| 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 |
| CN113466073A (en) * | 2021-06-30 | 2021-10-01 | 长安大学 | Conical abrasion instrument and abrasion method |
| CN113466073B (en) * | 2021-06-30 | 2023-06-23 | 长安大学 | Conical abrasion instrument and abrasion method |
| CN113607444A (en) * | 2021-07-26 | 2021-11-05 | 燕山大学 | High-speed heavy-duty train wheel rail profile friction wear and rolling contact fatigue test device |
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