CN110501244B - Asphalt mixture rut test device - Google Patents
Asphalt mixture rut test device Download PDFInfo
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- CN110501244B CN110501244B CN201910803910.6A CN201910803910A CN110501244B CN 110501244 B CN110501244 B CN 110501244B CN 201910803910 A CN201910803910 A CN 201910803910A CN 110501244 B CN110501244 B CN 110501244B
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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
- G01N3/32—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
Abstract
The invention discloses an asphalt mixture rut test device, which comprises: a box body; the supporting platform is arranged in the box body, a fixed shaft is arranged on the supporting platform, a rotating plate is rotatably connected onto the fixed shaft, and the rotating plate comprises a test template, a connecting plate and a transmission plate which are sequentially connected from left to right; the motor is arranged in the box body and is positioned below the transmission plate, and the motor drives the transmission plate to do reciprocating swing; the pressing rod is hinged to one short side wall of the box body, a connecting rod is arranged downwards in the middle of the pressing rod, the tail end of the connecting rod is connected with a grinding wheel, and a balancing weight is arranged at the tail end of the pressing rod so that the grinding wheel abuts against the surface of the asphalt mixture test mold on the test mold plate. The invention can simulate the actual driving condition on the asphalt mixture test mould of the turning or turning road section through the reciprocating swing of the asphalt mixture test mould, and can more accurately provide the rutting test data of the asphalt mixture of the turning or turning road section.
Description
Technical Field
The invention relates to the field of asphalt pavement testing equipment. More specifically, the invention relates to an asphalt mixture rut test device.
Background
With the rapid development of highways in China, the service performance of asphalt pavements is more and more emphasized, the rutting not only reduces the service life of the pavements, but also seriously affects the driving safety, the rutting becomes a main disease of the asphalt pavements, the rutting mainly occurs in the permanent deformation of the asphalt mixture at high temperature, and the rutting test is a simple and easy method for evaluating the high-temperature deformation of the asphalt mixture. However, most of the prior rut test devices are straight reciprocating rut tests, but in some turning or turning road sections, the actual condition of the road surface is often different from that of a straight running road section, which indicates that the actual stress condition of the asphalt mixture paved on the turning or turning road section cannot be accurately reflected by the prior straight reciprocating rut test, so that a rut test device capable of testing the asphalt mixture paved on the turning or turning road section is urgently needed.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
Still another object of the present invention is to provide an asphalt mixture rut test device capable of testing an asphalt mixture laid on a turning or u-turn road section.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided an asphalt mixture rutting test apparatus including:
a box body;
the supporting platform is arranged in the box body and is close to one short side wall of the box body, a fixed shaft is arranged on the supporting platform, a rotating plate is rotatably connected onto the fixed shaft, the rotating plate comprises a test template, a connecting plate and a transmission plate which are sequentially connected from left to right, the test template is square, the connecting plate is rectangular, the transmission plate is in a round-corner rectangular shape, one corner of the test template is connected to one short side end of the connecting plate, one round side of the transmission plate is connected to the other short side end of the connecting plate, a shaft hole matched with the fixed shaft is formed in the connecting plate, the transmission plate is located outside the range of the supporting platform and is close to the other short side wall of the box body, and a long-strip-shaped limiting guide hole is formed in the transmission plate;
the motor is arranged in the box body and is positioned below the transmission plate, a flywheel is coaxially connected to an output shaft of the motor, a moving shaft is arranged on the upper surface of the flywheel close to the edge of the flywheel, and the moving shaft penetrates through the limiting guide hole so that the motor drives the transmission plate to swing in a reciprocating manner;
the pressing rod is positioned above the supporting platform and hinged to one short side wall of the box body, the pressing rod and the rotating plate are positioned in the same straight line, a connecting rod is arranged downwards in the middle of the pressing rod, the tail end of the connecting rod is connected with a grinding wheel, and the tail end of the pressing rod is provided with a balancing weight so that the grinding wheel is pressed on the surface of an asphalt mixture test mold fixed on the test mold plate;
the other three angular points of the bottom surface of the test template are respectively provided with a support column, the lower end of each support column is inwards concave and is embedded with a ball in a rolling manner, and the ball is abutted against the support platform to support the test template to swing back and forth along with the transmission plate.
Preferably, the case lid of box is the right angle folded plate, and cover in the top surface of box with a long limit lateral wall of box, the case lid is in the top surface of box with the long limit of box is articulated, so that the case lid is gull-wing formula and opens.
Preferably, each edge of examination template all is provided with a bounding wall, wherein trilateral bounding wall with examination template fixed connection, at the opening end that trilateral bounding wall formed, the terminal surface of both sides bounding wall all is provided with the screw hole, the face of last one side bounding wall be close to both ends department respectively be equipped with the through-hole that the screw hole is relative, be provided with the bolt in the through-hole to can dismantle the rigid coupling at the opening end that trilateral bounding wall formed with last one side bounding wall, last one side bounding wall is provided with the hard rubber pad towards the face of the opening end that trilateral bounding wall formed, in order to support the tight placement pitch mixture examination mould on the examination template.
Preferably, the height of the coaming is higher than the top surface of the asphalt mixture test mould, and a water injection pipe is further arranged in the box body so as to inject water into a frame groove formed by the four coamings.
Preferably, the box cover is provided with a laser range finder at the position opposite to the lowest point of the grinding wheel so as to measure the distance between a probe of the laser range finder and the position of the connecting rod arranged on the pressure rod, and the laser range finder is in communication connection with a display so as to reflect the numerical value of the distance in real time through a curve.
Preferably, the motor is a variable frequency motor.
The invention at least comprises the following beneficial effects: can simulate the actual driving situation on turn or the turn round highway section bituminous mixture examination mould through the reciprocal swing of bituminous mixture examination mould, can be more accurate provide turn or turn round highway section bituminous mixture's rut test data, simultaneously because the recess that produces makes the depression bar slightly flagging among the rut test process, lead to the connecting rod not perpendicular with bituminous mixture examination mould, but slightly to the direction slope of keeping away from the bend centre of a circle, the pressure that the connecting rod transmits for the grinding wheel is more close the condition of reality driving in-process (there is the centrifugal transverse shear force of horizontal direction in addition to the pressure of vertical direction promptly), the data that obtain accord with actual conditions more.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic top view of one embodiment of the present invention;
FIG. 2 is a schematic top view of the working state of the embodiment of the present invention;
FIG. 3 is a schematic side view of an embodiment of the present invention;
FIG. 4 is an enlarged schematic view of a first embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a case cover according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a shroud according to an embodiment of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 6, the present invention provides an asphalt mixture rutting test apparatus, including:
the temperature control box comprises a box body 1, wherein the box body 1 can be a temperature control box, the temperature in the box body 1 can be set to a certain value and can be kept, and the temperature in an asphalt and asphalt mixture rutting test is generally required to be 60 +/-1 ℃ in the test specification (JTJ052-2000) T0719 of asphalt and asphalt mixtures, so the temperature value in the temperature control box can be set to be 60 ℃, and a box cover 18 of the box body 1 can be arranged on the top surface or the side wall of a long edge on the front surface;
a supporting platform 2 which is arranged in the box body 1 and is close to one short side wall of the box body 1, a fixed shaft 3 is arranged on the supporting platform 2, a rotating plate is connected on the fixed shaft 3 in a rotating way, the rotating plate comprises a test template 4, a connecting plate 5 and a transmission plate 6 which are connected in sequence from left to right, the test template 4 is square, the connecting plate 5 is rectangular, the transmission plate 6 is round-corner rectangular, one corner point of the test template 4 is connected with one short edge end of the connecting plate 5, one round edge of the transmission plate 6 is connected with the other short edge end of the connecting plate 5, the connecting plate 5 is provided with a shaft hole matched with the fixed shaft 3, the transmission plate 6 is positioned outside the range of the supporting platform 2 and close to the other short side wall of the box body 1, and the transmission plate 6 is provided with a long-strip-shaped limiting guide hole 7. Since the standard asphalt mixture test model size is 300 × 300 × 50mm, the size of the test model 4 is at least not smaller than the standard asphalt mixture test model size;
the motor 8 is arranged in the box body 1 and is positioned below the transmission plate 6, an output shaft of the motor 8 is coaxially connected with a flywheel 9, a movable shaft 10 is arranged on the upper surface of the flywheel 9 close to the edge, the movable shaft 10 penetrates through the limiting guide hole 7, so that the motor 8 drives the transmission plate 6 to swing in a reciprocating manner, the motor 8 can be a variable frequency motor to conveniently control the swing speed of the transmission plate 6, and the swing speed is also regulated to be 42 times/minute (once in a reciprocating manner) in the asphalt and asphalt mixture test procedure, so that the motor 8 can also use a common motor 8, the common motor 8 is certainly connected with a speed reducer for use, but in order to test higher or lower swing speed, the scheme of adopting the variable frequency motor is better;
the pressing rod 11 is positioned above the supporting platform 2 and hinged to one short side wall of the box body 1, the pressing rod 11 and the rotating plate are positioned in the same straight line, the middle of the pressing rod 11 is downwards provided with a connecting rod 12, the tail end of the connecting rod 12 is connected with a grinding wheel 13, the tail end of the pressing rod 11 is provided with a balancing weight 14, so that the grinding wheel 13 is pressed against the surface of an asphalt mixture test mold fixed on the test template 4, the specification of the grinding wheel 13 is also a standard part defined in an asphalt and asphalt mixture test procedure, and therefore the description is omitted, the pressure applied to the surface of the asphalt mixture test mold by the grinding wheel 13 is defined to be 0.7 +/-0.05 MPa in the asphalt and asphalt mixture test procedure, and the weight of the balancing weight 14 can be calculated according to the lever principle, the position of the connecting rod 12 on the pressing rod 11 and the length of the pressing rod 11;
the other three angular points of the bottom surface of the test template 4 are respectively provided with a support column 15, the lower end of each support column 15 is inwards recessed and rolled to be embedded with a ball 16, the ball 16 is abutted against the support platform 2 to support the test template 4 to swing back and forth along with the transmission plate 6, the lower end of each support column 15 is provided with a hemispherical ball 16 groove, the ball 16 is firstly placed into the ball 16 groove, the lower end of each support column 15 is coaxially and fixedly connected with a cylindrical limiting block 17, a cambered funnel-shaped through hole 21 is formed in each limiting block 17 to just abut against the ball 16, and only the lower part of the ball 16 is exposed out of the spherical crown part for walking.
In the use process of the embodiment, the pressure rod 11 is firstly lifted upwards, the prepared asphalt mixture test mold is fixed on the test mold plate 4, and then the grinding wheel 13 on the pressure rod 11 is placed on the surface of the asphalt mixture test mold. The enclosing plate 19 as described in the following embodiments may be provided on the test template 4 to fix the asphalt mixture test mold, or the asphalt mixture test mold may be fixed directly by gluing. And then the box cover 18 is closed, after the temperature in the box body 1 reaches the set 60 ℃, the motor 8 is started to lead the transmission plate 6 to swing, and further the test template 4 is driven to do arc-shaped reciprocating swing, and the dynamic stability of the asphalt mixture test template can be calculated by respectively measuring the track depth once in 45 minutes and 60 minutes. The test track depth can here be measured manually by hand, but the box 1 needs to be opened, which causes a variation in the temperature of the test interruption, which in turn leads to a deviation in the test results, and is therefore preferably measured using electronic equipment in the manner described in the following examples.
Because the actual driving condition on the bituminous mixture test mould of the turning or turning road section can be simulated through the reciprocating swing of the bituminous mixture test mould, the rut test data of the bituminous mixture of the turning or turning road section can be more accurately provided, meanwhile, the pressure rod 11 slightly droops due to the groove generated in the rut test process, so that the connecting rod 12 is not perpendicular to the surface of the bituminous mixture test mould, but slightly inclines towards the direction far away from the circle center of the curve, the pressure transmitted to the grinding wheel 13 by the connecting rod 12 is closer to the condition in the actual driving process (namely, the centrifugal transverse shearing force in the horizontal direction exists besides the pressure in the vertical direction), and the obtained data more accord with the actual condition.
In another embodiment, the cover 18 of the box 1 is a right-angle folded plate and covers the top surface of the box 1 and a long side wall of the box 1, and the cover 18 is hinged to the long side of the box 1 on the top surface of the box 1, so that the cover 18 is gull-wing opened. The case cover 18 arranged on the front surface of the case body 1 can cause the lifting height of the pressure lever 11 to be lower, so that another worker always needs to help lift the pressure lever 11 to lay the asphalt mixture test mold on the test mold plate 4, and the case cover 18 arranged on the top surface of the case body 1 needs to bend over to stretch into the case body 1 to lay the asphalt mixture test mold, which are both inconvenient. The box cover 18 of the embodiment does not affect the lifting of the pressure lever 11, and is convenient for workers to lay the asphalt mixture for testing the mold.
In another embodiment, each edge of the test template 4 is provided with a surrounding plate 19, wherein three surrounding plates 19 are fixedly connected with the test template 4, an open end formed by the three surrounding plates 19 is provided with a threaded hole 20 on the end surface of each surrounding plate 19, a through hole 21 opposite to the threaded hole 20 is respectively arranged at the position, close to two ends, of the surface of the last surrounding plate 19, a bolt is arranged in the through hole 21 so as to detachably and fixedly connect the last surrounding plate 19 to the open end formed by the three surrounding plates 19, and a hard rubber pad is arranged on the surface of the last surrounding plate 19, facing the open end formed by the three surrounding plates 19, so as to tightly support the asphalt mixture test template placed on the test template 4. Here, the size of the test template 4 is slightly larger than the size of a standard asphalt mixture test template, so that the enclosing plate 19 can be arranged at the edge of the test template 4, and the size in the enclosing plate 19 just meets the size requirement of the standard asphalt mixture test template. And if the coaming 19 of all rigid couplings in four sides is adopted, then inconvenient staff puts into the coaming 19 with the bituminous mixture examination mould or takes out from in the coaming 19, so set up a detachable coaming 19.
In another embodiment, the height of the enclosing plate 19 is higher than the top surface of the asphalt mixture test mold, and a water injection pipe 22 is further arranged in the box body 1 to inject water into a frame groove enclosed by the four enclosing plates 19. Therefore, the running condition of the asphalt mixture test mold under the flowing water scouring state can be simulated, and richer experimental data can be obtained. Since the reciprocating swing of the test template 4 will agitate the water waves in the enclosure 19, the height of the enclosure 19 can be increased to avoid a large amount of water droplets splashing out of the enclosure 19.
In another embodiment, a laser distance meter 23 is arranged on the box cover 18 at the lowest point opposite to the grinding wheel 13 to measure the distance between a probe of the laser distance meter 23 and the position of the connecting rod 12 arranged on the pressure rod 11, and the laser distance meter 23 is in communication connection with a display to reflect the distance value in real time through a curve. Here, by calculating the initial distance and the real-time distance, the difference between the two is the rutting depth, and obtaining the rutting depth through the laser range finder 23, the defect of manual measurement can be avoided, and meanwhile, the measurement result is more accurate.
In another embodiment, the motor 8 is a variable frequency motor, so that the swing speed of the test template 4 can be adjusted to test the driving condition of the asphalt mixture test template under more extreme conditions, and experimental data are enriched.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (3)
1. The utility model provides an asphalt mixture rut test device which characterized in that includes:
a box body;
the supporting platform is arranged in the box body and is close to one short side wall of the box body, a fixed shaft is arranged on the supporting platform, a rotating plate is rotatably connected onto the fixed shaft, the rotating plate comprises a test template, a connecting plate and a transmission plate which are sequentially connected from left to right, the test template is square, the connecting plate is rectangular, the transmission plate is in a round-corner rectangular shape, one corner of the test template is connected to one short side end of the connecting plate, one round side of the transmission plate is connected to the other short side end of the connecting plate, a shaft hole matched with the fixed shaft is formed in the connecting plate, the transmission plate is located outside the range of the supporting platform and is close to the other short side wall of the box body, and a long-strip-shaped limiting guide hole is formed in the transmission plate;
the motor is arranged in the box body and is positioned below the transmission plate, a flywheel is coaxially connected to an output shaft of the motor, a moving shaft is arranged on the upper surface of the flywheel close to the edge of the flywheel, and the moving shaft penetrates through the limiting guide hole so that the motor drives the transmission plate to swing in a reciprocating manner;
the pressing rod is positioned above the supporting platform and hinged to one short side wall of the box body, the pressing rod and the rotating plate are positioned in the same straight line, a connecting rod is arranged downwards in the middle of the pressing rod, the tail end of the connecting rod is connected with a grinding wheel, and the tail end of the pressing rod is provided with a balancing weight so that the grinding wheel is pressed on the surface of an asphalt mixture test mold fixed on the test mold plate;
the other three angular points of the bottom surface of the test template are respectively provided with a supporting column, the lower end of each supporting column is inwards concave and embedded with a ball in a rolling manner, and the ball is abutted against the supporting platform so as to support the test template to swing back and forth along with the transmission plate;
the box cover of the box body is a right-angle folded plate and covers the top surface of the box body and one long-side wall of the box body, and the box cover is hinged with the long side of the box body on the top surface of the box body so as to open the box cover in a gull-wing manner;
a laser range finder is arranged at the lowest point of the box cover, which is opposite to the grinding wheel, so as to measure the distance between a probe of the laser range finder and a connecting rod arranged on the pressure rod, and the laser range finder is in communication connection with a display so as to reflect the numerical value of the distance in real time through a curve;
the motor is a variable frequency motor.
2. The bituminous mixture rut testing device according to claim 1, wherein each edge of the test template is provided with a surrounding plate, wherein three surrounding plates are fixedly connected with the test template, the open ends formed by the three surrounding plates are provided with threaded holes on the end surfaces of the two surrounding plates, through holes opposite to the threaded holes are respectively formed on the plate surface of the last surrounding plate close to the two ends, bolts are arranged in the through holes to detachably and fixedly connect the last surrounding plate to the open ends formed by the three surrounding plates, and hard rubber pads are arranged on the plate surface of the last surrounding plate facing the open ends formed by the three surrounding plates to tightly support the bituminous mixture test template placed on the test template.
3. The asphalt mixture rut test device according to claim 2, wherein the height of the enclosing plate is higher than the top surface of the asphalt mixture test mold, and a water injection pipe is further arranged in the box body to inject water into a frame groove enclosed by the four enclosing plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910803910.6A CN110501244B (en) | 2019-08-28 | 2019-08-28 | Asphalt mixture rut test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910803910.6A CN110501244B (en) | 2019-08-28 | 2019-08-28 | Asphalt mixture rut test device |
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| Publication Number | Publication Date |
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| CN110501244A CN110501244A (en) | 2019-11-26 |
| CN110501244B true CN110501244B (en) | 2022-03-15 |
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| CN201910803910.6A Active CN110501244B (en) | 2019-08-28 | 2019-08-28 | Asphalt mixture rut test device |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954113A (en) * | 2016-04-26 | 2016-09-21 | 长安大学 | Bituminous mixture circuit wheel tracking test device and test method |
| CN107063902A (en) * | 2017-04-08 | 2017-08-18 | 温州信达交通工程试验检测有限公司 | A kind of wheel tracking test device and the wheel tracking test method based on the experimental rig |
| CN207623163U (en) * | 2017-12-25 | 2018-07-17 | 台州市交通工程试验检测中心股份有限公司 | Automatic vehicle tracking test instrument |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2004751C2 (en) * | 2010-05-20 | 2011-11-22 | Ooms Nederland Holding B V | TEST DEVICE. |
| US9964471B2 (en) * | 2014-04-14 | 2018-05-08 | Instrotek, Inc. | Wheel-tracking devices and related systems and methods |
| CN105445180A (en) * | 2015-12-17 | 2016-03-30 | 甘肃昌恒公路养护技术有限责任公司 | Pavement antiskid performance testing device and testing method thereof |
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2019
- 2019-08-28 CN CN201910803910.6A patent/CN110501244B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954113A (en) * | 2016-04-26 | 2016-09-21 | 长安大学 | Bituminous mixture circuit wheel tracking test device and test method |
| CN107063902A (en) * | 2017-04-08 | 2017-08-18 | 温州信达交通工程试验检测有限公司 | A kind of wheel tracking test device and the wheel tracking test method based on the experimental rig |
| CN207623163U (en) * | 2017-12-25 | 2018-07-17 | 台州市交通工程试验检测中心股份有限公司 | Automatic vehicle tracking test instrument |
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