A test device for evaluating asphalt dosage in asphalt mixture

Abstract

The present invention discloses a test device for evaluating the asphalt dosage of asphalt mixture, comprising a drying box, a rotating device is provided on one side of the drying box, a rotating rod is connected to the rotating device, one end of the rotating rod penetrates the side wall of the drying box and extends into the drying box, and one end of the rotating rod is detachably connected to a roller. Through the test device, during the rotation process, the excess asphalt binder, fine aggregate, mastic, etc. in the asphalt mixture sample can be fully contacted with the inner wall of the mixing barrel through continuous rotation, reducing the influence of factors of artificial sample loading, making the asphalt leakage test result more accurate, so that the asphalt dosage of the asphalt mixture can be more accurately and quantitatively evaluated, avoiding the impact of too small asphalt mixture dosage on the durability of the road surface, and avoiding leakage and oil overflow caused by too large asphalt dosage. Compared with traditional asphalt leakage test equipment, the test result is more accurate and the effect is more obvious.

Description

Technical Field

[0001] The invention relates to the technical field of asphalt mixture, and in particular to a test device for evaluating asphalt dosage of asphalt mixture. Background Art

[0002] Asphalt mixture is a composite material, mainly composed of asphalt, coarse aggregate, fine aggregate, mineral powder, and sometimes polymers and wood cellulose. These materials of different qualities and quantities are mixed to form different structures and have different mechanical properties.

[0003] At present, when preparing asphalt mixture according to needs, it is necessary to test the amount of asphalt. However, the threshold of asphalt dosage calculated by the thickness of asphalt oil film has limitations due to the different aggregate density and water absorption rate. The oil film thickness itself is also an empirical value. The threshold of asphalt dosage is determined by using multiple variables and fuzzy values. It is also unscientific to use "powder-rubber ratio" as one of the basis for judgment. The range of powder-rubber ratio is too wide, and the oil consumption of asphalt mixture is closely related to the physical properties and grading combination of the aggregate itself. The powder-rubber ratio cannot reflect these properties and has limitations. In addition, when using the Schellenberg asphalt leakage test of asphalt mixture, the instruments and equipment used in the test procedure center are mainly beakers and ovens. Due to the problem of static standing and manual loading of samples, the accuracy of the test is greatly affected by human factors, which will lead to errors in the test. For this reason, we propose a test device for evaluating the asphalt dosage of asphalt mixture to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a test device for evaluating the asphalt dosage of asphalt mixture.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A test device for evaluating the asphalt usage of asphalt mixture, comprising a drying box, a rotating device is provided on one side of the drying box, a rotating rod is connected to the rotating device, one end of the rotating rod penetrates the side wall of the drying box and extends into the drying box, one end of the rotating rod is detachably connected to a roller, a supporting device is provided at the bottom of the drying box, the lower end of the roller abuts against the upper end of the supporting device, three mixing barrels are provided in the drum, six spring blocks are fixed at equal intervals on a peripheral side wall of the drum, two adjacent spring blocks form a group, one ends of two spring blocks in the same group both abut against the side wall of a mixing barrel, a fixing ring is fixed on a peripheral side wall of the mixing barrel, six mixing plates are fixed at equal intervals on a peripheral side wall of the fixing ring, connecting frames are fixed at the four corners of the lower end of the drying box, and a bearing device is provided on the connecting frame.

[0007] Preferably, the rotating device includes a mounting frame fixed to one side of the drying box, a speed changing mechanism is fixed to one side of the mounting frame, a driving motor is fixed to the upper end of the speed changing mechanism, the output shaft of the driving motor is connected to the speed changing mechanism, and the other end of the rotating rod is connected to the speed changing mechanism.

[0008] Preferably, the supporting device includes four mounting plates fixed to the bottom of the drying box by eight first screws, two supporting frames are fixed to the upper ends of the mounting plates, and supporting wheels are installed on the supporting frames, and the upper ends of the two supporting wheels are both in contact with the lower end of the drum.

[0009] Preferably, the supporting device includes a screw rod penetrating the connecting frame, the lower end of the connecting frame is provided with a threaded through hole, the upper end of the screw rod passes through the threaded through hole, the lower end of the screw rod is rotatably connected to a support seat, and the upper end of the screw rod is threadedly sleeved with a nut.

[0010] Preferably, an external thread is provided on a side wall of the mixing barrel, a sealing cover is provided on one side of the mixing barrel, a groove is provided on one side of the sealing cover, one end of the mixing barrel extends into the groove, an internal thread corresponding to the external thread is provided on the side wall of the groove, the external thread and the internal thread are screwed together, and a handle is fixed to the other end of the sealing cover.

[0011] Preferably, a connecting plate is fixed to one end of the rotating rod, and four through holes are provided on the connecting plate. Four threaded blind holes corresponding to the through holes are provided on one side of the drum. A second screw passes through the through hole, and one end of the second screw extends into the threaded blind hole.

[0012] Preferably, a first opening is provided on one side of the drying box, a cover is hinged on one side of the first opening, and a handle is installed on one side of the cover.

[0013] Preferably, heaters are fixed on opposite side walls in the drying box.

[0014] Preferably, two support members are fixed on both sides of the lower end of the drying box, and one side of the four support members is fixed on one side of the four connecting frames respectively.

[0015] In the present invention, when in use, the drying box is first placed in a suitable position through the support seat. When the height needs to be adjusted, the screw is rotated, and the rotation of the screw drives the support seat to move, thereby adjusting the height, and then the position of the drying box is fixed by the support member, and the cover is opened by the handle, and then the sealing cover is unscrewed from the mixing barrel, and the asphalt mixture is poured into the three mixing barrels, and then the sealing cover is screwed on, and the cover is closed, and the transfer speed of the driving motor and the specified number of transfers are set by the control box on one side of the drying box, and the asphalt in the mixing barrel is heated and kept warm by the heater, and the rotation of the output shaft of the driving motor drives the rotation of the rotating rod, and the rotation of the rotating rod drives the rotation of the drum, and the spring block in the drum clamps the mixing barrel, and the mixing barrel is driven to rotate when the drum rotates, and the asphalt mixture is driven to rotate when the mixing barrel rotates, and the mixing barrel is driven to rotate when the mixing barrel rotates. The mixing plate mixes the asphalt mixture. After the mixing and heat preservation is completed, the cover and the sealing cover are opened to pour out the asphalt mixture in the mixing barrel, and then the mass and percentage of asphalt leakage in the drum are measured to detect the amount of excess free asphalt precipitated from the asphalt binder under high temperature. The present invention uses the test device. During the rotation process, the excess asphalt binder, fine aggregate, mastic, etc. in the asphalt mixture sample can be fully in contact with the inner wall of the mixing barrel through continuous rotation, reducing the influence of factors caused by manual loading of samples, making the asphalt leakage test result more accurate, so as to more accurately and quantitatively evaluate the amount of asphalt used in the asphalt mixture, avoid the durability of the road surface affected by too small an amount of asphalt mixture, and avoid leakage and oil overflow caused by too large an amount of asphalt. Compared with traditional asphalt leakage test equipment, the test result is more accurate and the effect is more obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the external structure of a test device for evaluating the amount of asphalt in asphalt mixture proposed by the present invention;

[0017] Figure 2 A schematic diagram of the internal structure of a test device for evaluating asphalt dosage of asphalt mixture proposed by the present invention;

[0018] Figure 3 A schematic diagram of the internal structure of a drum of a test device for evaluating asphalt usage in asphalt mixture proposed by the present invention;

[0019] Figure 4 This is a schematic diagram of the internal structure of a mixing barrel of a test device for evaluating asphalt usage in asphalt mixtures proposed by the present invention;

[0020] Figure 5 This is an enlarged view of point A of a test device for evaluating asphalt dosage of asphalt mixture proposed by the present invention;

[0021] Figure 6This is an enlarged view of point B of a test device for evaluating the asphalt dosage of asphalt mixture proposed by the present invention.

[0022] In the figure: 1 spring block, 2 mixing barrel, 3 rotating rod, 4 supporting wheel, 5 supporting frame, 6 roller, 7 heater, 8 mounting plate, 9 first screw, 10 drying box, 11 opening, 12 sealing cover, 13 handle, 14 handle, 15 sealing cover, 16 external thread, 17 driving motor, 18 speed change mechanism, 19 mounting frame, 20 screw, 21 supporting member, 22 supporting seat, 23 connecting frame, 24 mixing plate, 25 connecting plate, 26 fixing ring. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] Reference Figure 1-6 A test device for evaluating the asphalt usage of asphalt mixture includes a drying box 10, which is convenient for heating and heat preservation of asphalt. A rotating device is provided on one side of the drying box 10, and a rotating rod 3 is connected to the rotating device. One end of the rotating rod 3 passes through the side wall of the drying box 10 and extends into the drying box 10. One end of the rotating rod 3 is detachably connected to a roller 6. When the rotating rod 3 rotates, the roller 6 is driven to rotate. A supporting device is provided at the bottom of the drying box 10. The lower end of the roller 6 abuts against the upper end of the supporting device, which is convenient for supporting the roller 6. Under the action of the rotating device, it is convenient to provide power for the rotation of the roller 6.

[0025] In the present invention, three mixing barrels 2 are provided in the drum 6 for containing asphalt mixture. Six spring blocks 1 are fixed at equal intervals on a side wall of the drum 6. Two adjacent spring blocks 1 form a group. One ends of two spring blocks 1 in the same group are both in contact with the side wall of a mixing barrel 2. The spring blocks 1 are used to conveniently limit the position of the mixing barrel 2. A fixing ring 26 is fixed on a side wall of the mixing barrel 2. Six stirring plates 24 are fixed at equal intervals on a side wall of the fixing ring 26. It is convenient to stir the asphalt mixture in the mixing barrel 2. When the drum 6 rotates, the mixing barrel 2 is driven to rotate, thereby conveniently accelerating the stirring speed of the asphalt mixture.

[0026] In the present invention, connecting frames 23 are fixed to the four corners of the lower end of the drying box 10, and a bearing device is provided on the connecting frame 23 to facilitate supporting the drying box 10. A first opening is provided on one side of the drying box 10, and a cover 12 is hinged on one side of the first opening. A handle 13 is installed on one side of the cover 12, and the cover 12 is convenient to open using the handle 13. Heaters 7 are fixed on the opposite side walls of the drying box 10 to facilitate heating of the asphalt. Two support members 21 are fixed on both sides of the lower end of the drying box 10, and one side of the four support members 21 is respectively fixed to one side of the four connecting frames 23. Under the action of the bearing device, the drying box 10 is convenient to stably support.

[0027] In the present invention, the rotating device includes a mounting frame 19 fixed to one side of the drying box 10, a speed changing mechanism 18 is fixed to one side of the mounting frame 19, a driving motor 17 is fixed to the upper end of the speed changing mechanism 18, the output shaft of the driving motor 17 is connected to the speed changing mechanism 18, the other end of the rotating rod 3 is connected to the speed changing mechanism 18, the driving motor 17 is connected to the external component, the output shaft of the driving motor 17 rotates to drive the speed changing mechanism 18 to rotate, the speed changing mechanism 18 rotates to drive the rotating rod 3 to rotate, thereby providing power for the rotation of the drum 6.

[0028] In the present invention, the supporting device includes four mounting plates 8 fixed to the bottom of the drying box 10 by eight first screws 9, two supporting frames 5 are fixed to the upper ends of the mounting plates 8, and supporting wheels 4 are installed on the supporting frames 5. The upper ends of the two supporting wheels 4 are both in contact with the lower end of the drum 6. The supporting wheels 4 are used to facilitate the support of the drum 6 to prevent the drum 6 from shaking when rotating.

[0029] In the present invention, the supporting device includes a screw rod 20 that is penetrated and arranged on a connecting frame 23, a threaded through hole is provided at the lower end of the connecting frame 23, the upper end of the screw rod 20 passes through the threaded through hole, the lower end of the screw rod 20 is rotatably connected to a support seat 22, and a nut is threadedly sleeved on the upper end of the screw rod 20. When the screw rod 20 rotates, it drives the support seat 22 to move, thereby adjusting the height of the drying box 10 as needed.

[0030] In the present invention, an external thread 16 is provided on a peripheral side wall of the mixing barrel 2, a sealing cover 15 is provided on one side of the mixing barrel 2, a groove is provided on one side of the sealing cover 15, one end of the mixing barrel 2 extends into the groove, an internal thread corresponding to the external thread 16 is provided on a peripheral side wall in the groove, the external thread 16 and the internal thread are screwed together, and a handle 14 is fixed to the other end of the sealing cover 15, and the sealing cover 15 is conveniently opened and tightened by the handle 14.

[0031] In the present invention, a connecting plate 25 is fixed to one end of the rotating rod 3, and four through holes are provided on the connecting plate 25. Four threaded blind holes corresponding to the through holes are provided on one side of the drum 6. A second screw is passed through the through hole, and one end of the second screw extends into the threaded blind hole, which facilitates installation and disassembly, improves the efficiency of installation and disassembly, and saves time.

[0032] In the present invention, when conducting the test, the drying box 10 is started, and the rotation rate is 30r / min, and the rotation speed is uniformly rotated to 1000r and then the mixing barrel 2 is taken out. Without any impact or vibration, the mixture is turned down on the glass plate, and the mixture is placed on the balance using a hand shovel, cotton yarn, etc. The total mass m2 of the mixing barrel 2 and the asphalt binder, fine aggregate, mastic, etc. adhered to the mixing barrel 2 is weighed, accurate to 0.01g, m0 is the mass of the leakage test cylinder (g), m1 is the total mass of the leakage test cylinder and the sample (g), m2 is the total mass of the leakage test cylinder and the asphalt binder, fine aggregate, mastic, etc. on the leakage test cylinder (g), ∆m is the asphalt leakage loss (%), and then use To calculate the asphalt leakage loss, the test should be carried out at least 3 times in parallel and the average value should be taken as the test result.

[0033] In the present invention, when in use, the drying box 10 is first placed in a suitable position through the support seat 22. When the height needs to be adjusted, the screw rod 20 is rotated, and the rotation of the screw rod 20 drives the support seat 22 to move, so as to adjust the height, and then the position of the drying box 10 is fixed by the support member 21, and the cover 12 is opened by the handle 13, and then the sealing cover 15 is screwed off from the mixing barrel 2, and the asphalt mixture is poured into the three mixing barrels 2, and then the sealing cover 15 is screwed on, and the cover 12 is closed, and the transport speed and the specified number of transports of the driving motor 17 are set through the control box on one side of the drying box 10, and the asphalt in the mixing barrel 2 is heated by the heater 7. When the mixing drum 2 is rotated, the mixing drum 2 is driven to rotate, and the asphalt mixture is driven to rotate. The asphalt mixture is mixed by the stirring plate 24 in the mixing drum 2. After the mixing and heat preservation is completed, the sealing cover 12 and the sealing cover 15 are opened, and the asphalt mixture in the mixing drum 2 is poured out. Then, the mass and percentage of asphalt leakage in the drum 6 are measured to detect the amount of excess free asphalt precipitated from the asphalt binder under high temperature.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A test device for evaluating the amount of asphalt in an asphalt mixture, comprising a drying box (10), characterized in that: A rotating device is provided on one side of the drying box (10), and a rotating rod (3) is connected to the rotating device. One end of the rotating rod (3) passes through the side wall of the drying box (10) and extends into the drying box (10). One end of the rotating rod (3) is detachably connected to a roller (6). A supporting device is provided at the bottom of the drying box (10), and the lower end of the roller (6) abuts against the upper end of the supporting device. Three stirring barrels (2) are provided in the roller (6), and six springs (2) are fixed at equal intervals on a circumference of the side wall of the roller (6). A spring clamp (1), two adjacent spring clamps (1) form a group, one end of the two spring clamps (1) in the same group abuts against the side wall of a mixing barrel (2), a fixing ring (26) is fixed on a circle of the side wall inside the mixing barrel (2), six stirring plates (24) are fixed on a circle of the side wall inside the fixing ring (26) at equal intervals, a connecting frame (23) is fixed at the four corners of the lower end of the drying box (10), and a bearing device is provided on the connecting frame (23); the supporting device includes a first screw (9) fixed to the first side wall of the mixing barrel (2) and a second screw (9) fixed to the first side wall of the mixing barrel (2). Four mounting plates (8) are provided at the bottom of the drying box (10), two support frames (5) are fixed at the upper ends of the mounting plates (8), support wheels (4) are installed on the support frames (5), and the upper ends of the two support wheels (4) are both in contact with the lower ends of the rollers (6); an external thread (16) is provided on a peripheral side wall of the mixing barrel (2), a sealing cover (15) is provided on one side of the mixing barrel (2), a groove is provided on one side of the sealing cover (15), one end of the mixing barrel (2) extends into the groove, and a peripheral side wall in the groove is provided An internal thread corresponding to the external thread (16), the external thread (16) and the internal thread being screwed together, a handle (14) being fixed to the other end of the sealing cover (15); a connecting plate (25) being fixed to one end of the rotating rod (3), the connecting plate (25) being provided with four through holes, one side of the drum (6) being provided with four threaded blind holes corresponding to the through holes, a second screw being passed through the through hole, one end of the second screw extending into the threaded blind hole; heaters (7) are fixed to opposite side walls in the drying box (10).

2. A test device for evaluating asphalt dosage of asphalt mixture according to claim 1, characterized in that: The rotating device comprises a mounting frame (19) fixed to one side of the drying box (10); a speed change mechanism (18) is fixed to one side of the mounting frame (19); a driving motor (17) is fixed to the upper end of the speed change mechanism (18); an output shaft of the driving motor (17) is connected to the speed change mechanism (18); and the other end of the rotating rod (3) is connected to the speed change mechanism (18).

3. A test device for evaluating asphalt dosage of asphalt mixture according to claim 1, characterized in that: The bearing device comprises a screw rod (20) penetrating a connection frame (23); a threaded through hole is provided at the lower end of the connection frame (23); the upper end of the screw rod (20) penetrates the threaded through hole; the lower end of the screw rod (20) is rotatably connected to a support seat (22); and the upper end of the screw rod (20) is threadedly sleeved with a nut.

4. A test device for evaluating asphalt dosage of asphalt mixture according to claim 1, characterized in that: A first opening is provided on one side of the drying box (10), a cover (12) is hingedly connected to one side of the first opening, and a handle (13) is installed on one side of the cover (12).

5. A test device for evaluating asphalt dosage of asphalt mixture according to claim 1, characterized in that: Two support members (21) are fixed to both sides of the lower end of the drying box (10), and one side of the four support members (21) is fixed to one side of four connection frames (23) respectively.

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