CN111381015A - A test device for evaluating asphalt content of asphalt mixture - Google Patents

Abstract

The invention discloses a test device for evaluating asphalt consumption of an asphalt mixture, which comprises a drying box, wherein a rotating device is arranged on one side of the drying box, a rotating rod is connected to the rotating device, one end of the rotating rod penetrates through the side wall of the drying box and extends into the drying box, and a roller is detachably connected to one end of the rotating rod. According to the test device, in the rotating process, redundant asphalt binder, fine aggregate, mastic and the like in the asphalt mixture sample can be in full contact with the inner wall of the stirring barrel through continuous rotation, so that the influence of factors of manually loading the sample is reduced, and the asphalt leakage test result is more accurate, so that the asphalt consumption of the asphalt mixture can be accurately and quantitatively evaluated, the phenomenon that the durability of a pavement is influenced due to the fact that the asphalt consumption is too small is avoided, leakage and oil bleeding caused by the fact that the asphalt consumption is too large is also avoided, compared with the traditional asphalt leakage test device, the test result is more prepared, and the effect is more obvious.

Description

A test device for evaluating asphalt content of asphalt mixture

technical field

The invention relates to the technical field of asphalt mixtures, in particular to a test device for evaluating the asphalt consumption of asphalt mixtures.

Background technique

Asphalt mixture is a kind of composite material, which is mainly composed of asphalt, coarse aggregate, fine aggregate, mineral powder, and some polymers and wood cellulose are added; these materials of different quality and quantity are mixed to form different structures, and have different mechanical properties.

At present, when preparing asphalt mixtures according to needs, it is necessary to test the amount of asphalt. However, the threshold value of asphalt amount calculated by using the asphalt oil film thickness, due to the different aggregate densities and different water absorption rates, the oil film thickness itself is also an empirical value. Various variables and fuzzy numerical values determine the threshold of asphalt dosage, which has its own limitations, and it is unscientific to use the "powder-to-binder ratio" as one of the basis for judgment. The use of oil has a lot to do with the physical properties and gradation combination of the aggregate itself. The powder-to-binder ratio cannot reflect these properties, so there are limitations. In addition, when using the Schellenberg asphalt leakage test for asphalt mixtures, the center of this test procedure uses The main equipment is beakers and ovens. The accuracy of the test is greatly affected by human factors due to the problem of standing still and the manual loading of the asphalt mixture, which will lead to errors in the test. Therefore, we propose an evaluation method for asphalt mixture. A test device for the amount of asphalt in the mixture is used to solve the above problems.

SUMMARY OF THE INVENTION

The purpose of the present invention is to propose a test device for evaluating the asphalt consumption of asphalt mixtures in order to solve the shortcomings existing in the prior art.

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

A test device for evaluating the asphalt consumption of an asphalt mixture, comprising a drying box, one side of the drying box is provided with a rotating device, the rotating device is connected with a rotating rod, and one end of the rotating rod penetrates the drying box The side wall of the drying box extends into the drying box. One end of the rotating rod is detachably connected to a drum. The bottom of the drying box is provided with a supporting device. The lower end of the drum is in contact with the upper end of the supporting device. There are three mixing buckets in the drum, six spring clips are fixed at equal intervals on the circumferential side wall of the drum, two adjacent spring clips are a group, and one end of the two spring clips in the same group is It is in contact with the side wall of a stirring bucket, a fixing ring is fixed on the surrounding side wall in the mixing bucket, and six stirring plates are fixed at equal intervals on the surrounding side wall in the fixing ring. The four corners of the lower end are all fixed with connecting frames, and the connecting frames are provided with bearing devices.

Preferably, the rotating device includes a mounting frame fixed on one side of the drying box, a speed change mechanism is fixed on one side of the mounting frame, a drive motor is fixed on the upper end of the speed change mechanism, and the output shaft of the drive motor is connected to On the shifting mechanism, the other end of the rotating rod is connected to the shifting mechanism.

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 on the upper ends of the mounting plates, and supporting wheels are installed on the supporting frames, The upper ends of the two support wheels are in contact with the lower end of the drum.

Preferably, the bearing device includes a screw rod disposed through the connecting frame, the lower end of the connecting frame is provided with a threaded through hole, the upper end of the screw rod penetrates the threaded through hole, and the lower end of the screw rod is rotatably connected with a support seat, The upper end of the screw rod is threadedly sleeved with a nut.

Preferably, an outer thread is provided on a peripheral 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, and one end of the mixing barrel extends to the concave In the groove, an inner thread corresponding to the outer thread is arranged on a peripheral side wall in the groove, the outer thread and the inner thread are screwed with each other, and a handle is fixed at the other end of the sealing cover.

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

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.

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

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

In the present invention, when using, first place the drying box in a suitable position through the support seat, and when the height needs to be adjusted, the screw is rotated, and the rotation of the screw drives the support seat to move, so as to adjust the height, and then use the support to adjust the height. Fix the position of the drying box, use the handle to open the cover, then unscrew the sealing cover from the mixing drum, pour the asphalt mixture into the three mixing drums, screw the sealing cover on, close the cover, and pass the The control box on the side of the drying box sets the transfer speed of the driving motor and the specified number of transfers, and the asphalt in the mixing drum is heated and kept warm by the heater. When the output shaft of the driving motor rotates, the rotating rod rotates. When the rotating rod rotates Drive the drum to rotate, because the spring block in the drum clamps the mixing drum, when the drum rotates, it drives the mixing drum to rotate, and when the mixing drum rotates, it drives the asphalt mixture to rotate, and the asphalt mixture is mixed by the mixing plate in the mixing drum. After mixing and heat preservation, open the cover and seal cover, pour out the asphalt mixture in the mixing drum, and then measure the mass and percentage of asphalt leakage in the drum to detect the asphalt binder from the asphalt binder at high temperature. The amount of excess free asphalt is precipitated. Through the test device in the present invention, during the rotation process, the excess asphalt binder, fine aggregate, mastic, etc. in the asphalt mixture sample can be continuously rotated to fully interact with the inner wall of the mixing tank. Contact, reduce the influence of factors that manually load the sample, and make the results of the asphalt leakage test more accurate, so that the amount of asphalt in the asphalt mixture can be more accurately and quantitatively evaluated, so as to avoid too small amount of asphalt mixture to affect the durability of the pavement, and also Compared with the traditional asphalt leakage test equipment, the test results are more prepared and the effect is more obvious to avoid leakage and oil flooding caused by the excessive amount of asphalt.

Description of drawings

1 is a schematic diagram of the external structure of a test device for evaluating the asphalt consumption of an asphalt mixture proposed by the present invention;

Figure 2 is a schematic diagram of the internal structure of a test device for evaluating the asphalt consumption of an asphalt mixture proposed by the present invention;

3 is a schematic diagram of the internal structure of a drum of a test device for evaluating the asphalt consumption of asphalt mixture proposed by the present invention;

4 is a schematic diagram of the internal structure of a mixing drum of a test device for evaluating the asphalt consumption of asphalt mixture proposed by the present invention;

Fig. 5 is an enlarged view of place A of a test device for evaluating the asphalt consumption of asphalt mixture proposed by the present invention;

FIG. 6 is an enlarged view of B of a test device for evaluating the asphalt content of an asphalt mixture proposed by the present invention.

In the picture: 1 spring block, 2 mixing bucket, 3 rotating rod, 4 supporting wheel, 5 supporting frame, 6 drum, 7 heater, 8 mounting plate, 9 first screw, 10 drying box, 11 opening, 12 sealing Cover, 13 handle, 14 handle, 15 seal cover, 16 external thread, 17 drive motor, 18 speed change mechanism, 19 mounting bracket, 20 screw, 21 support, 22 support seat, 23 connection frame, 24 stirring plate, 25 connection plate, 26 fixing rings.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments.

Referring to Figures 1-6, a test device for evaluating the amount of asphalt in asphalt mixtures includes a drying box 10, which is convenient for heating and insulating the asphalt. One side of the drying box 10 is provided with a rotating device, and a rotating rod is connected to the rotating device. 3. One end of the rotating rod 3 penetrates 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 with the drum 6. When the rotating rod 3 rotates, it drives the drum 6 to rotate, and the drying box 10 The inner bottom is provided with a support device, and the lower end of the drum 6 is in contact with the upper end of the support device, which is convenient for supporting the drum 6, and under the action of the rotating device, it is convenient to provide power for the rotation of the drum 6.

In the present invention, three mixing buckets 2 are arranged in the drum 6, which is convenient for holding the asphalt mixture. Six spring blocks 1 are fixed at equal intervals on the circumferential side wall of the drum 6, and two adjacent spring blocks 1 are fixed. As a group, one end of the two spring blocks 1 in the same group is in contact with the side wall of a mixing barrel 2, and the position of the mixing barrel 2 is conveniently limited by the spring blocks 1. The surrounding side wall in the mixing barrel 2 A fixing ring 26 is fixed thereon, and six stirring plates 24 are fixed at equal intervals on the circumferential side wall of the fixing ring 26, which is convenient for stirring the asphalt mixture in the mixing drum 2. When the drum 6 rotates, the mixing drum 2 is driven to rotate, thereby It is convenient to speed up the mixing speed of asphalt mixture.

In the present invention, the four corners of the lower end of the drying box 10 are fixed with a connecting frame 23, the connecting frame 23 is provided with a bearing device, which is convenient to support the drying box 10, and one side of the drying box 10 is provided with a first opening, a first opening. A cover 12 is hinged on one side of the opening, a handle 13 is installed on one side of the cover 12, and the cover 12 is easily opened by using the handle 13. A heater 7 is fixed on the opposite side walls of the drying box 10, which is convenient for the asphalt. For heating, two supporting members 21 are fixed on both sides of the lower end of the drying box 10, and one side of the four supporting members 21 is respectively fixed on one side of the four connecting frames 23. The dry box 10 is stably supported.

In the present invention, the rotating device includes an installation frame 19 fixed on one side of the drying box 10 , a speed change mechanism 18 is fixed on one side of the installation frame 19 , a drive motor 17 is fixed on the upper end of the speed change mechanism 18 , and the output shaft of the drive motor 17 Connected to the speed change mechanism 18, the other end of the rotating rod 3 is connected to the speed change mechanism 18, the drive motor 17 is connected to the external component, the output shaft of the drive motor 17 rotates to drive the speed change mechanism 18 to rotate, and the rotation of the speed change mechanism 18 drives the rotating rod 3 to rotate , so as to provide power for the rotation of the drum 6 .

In the present invention, the supporting device includes four mounting plates 8 fixed on the inner bottom of the drying box 10 through eight first screws 9, two supporting frames 5 are fixed on the upper ends of the mounting plates 8, and the supporting frames 5 are mounted with supporting Wheel 4, the upper ends of the two support wheels 4 are in contact with the lower end of the drum 6, the drum 6 is easily supported by the support wheels 4, and the drum 6 is prevented from shaking during rotation.

In the present invention, the bearing device includes a screw rod 20 disposed through the connecting frame 23, the lower end of the connecting frame 23 is provided with a threaded through hole, the upper end of the screw rod 20 penetrates the threaded through hole, and the lower end of the screw rod 20 is rotatably connected with a support seat 22, The upper end of the screw 20 is threadedly sleeved with a nut. When the screw 20 rotates, it drives the support base 22 to move, so as to adjust the height of the drying box 10 as required.

In the present invention, an external thread 16 is provided on the 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, and one end of the mixing barrel 2 extends to the concave In the groove, an inner thread corresponding to the outer thread 16 is provided on the circumferential side wall of the groove, the outer thread 16 and the inner thread are screwed with each other, and the other end of the sealing cover 15 is fixed with a handle 14, which is convenient to open by using the handle 14 and tighten the sealing cap 15.

In the present invention, one end of the rotating rod 3 is fixed with a connecting plate 25, the connecting plate 25 is provided with four through holes, one side of the drum 6 is provided with four threaded blind holes corresponding to the through holes, and the through holes penetrate There is a second screw, and one end of the second screw extends into the threaded blind hole, which is convenient for installation and removal, improves the efficiency of installation and removal, and saves time.

进行沥青析漏损失计算，试验至少进行平行试验3次，然后取平均值作为试验结果。In the present invention, during the test, start the drying box 10, rotate at a constant speed of 30 r/min to 1000 r to stop, then take out the mixing barrel 2, without any impact or vibration, the mixture is buckled down on the On the glass plate, use hand shovel cotton yarn, etc. to place the mixture on the balance, and weigh the total mass m2 of the mixing bucket 2 and the asphalt binder, fine aggregate, mastic, etc. adhered to the mixing bucket 2, accurate to 0.01 g, m0 is the mass of the leakage test tube (g), m1 is the total mass of the leakage test tube and the sample (g), m2 is the asphalt binder, fine aggregate, horseshoe on the leakage test tube and the leakage test tube Total mass such as grease (g), Δm is the loss of asphalt leakage (%), and then use

To calculate the leakage loss of asphalt, conduct at least three parallel tests, and then take the average value as the test result.

In the present invention, when using, the drying box 10 is first placed in a suitable position through the support base 22, and when the height needs to be adjusted, the screw 20 is rotated, and the rotation of the screw 20 drives the support base 22 to move, so as to adjust the height, and then Then use the support 21 to fix the position of the drying box 10, use the handle 13 to open the cover 12, then unscrew the sealing cover 15 from the mixing barrel 2, pour the asphalt mixture into the three mixing barrels 2, and then Screw on the sealing cover 15, close the cover 12, set the transfer speed of the driving motor 17 and the specified number of transfers through the control box on the side of the drying box 10, and heat the asphalt in the mixing drum 2 by the heater 7 In order to keep warm, when the output shaft of the driving motor 17 rotates, it drives the rotating rod 3 to rotate, and when the rotating rod 3 rotates, it drives the drum 6 to rotate. Since the spring block 1 in the drum 6 clamps the mixing bucket 2, the drum 6 drives the mixing bucket when it rotates. 2 rotates, when the mixing drum 2 rotates, the asphalt mixture is driven to rotate, and the asphalt mixture is mixed by the stirring plate 24 in the mixing drum 2. The asphalt mixture is poured out, and then the mass and percentage of asphalt leakage in the drum 6 are measured to detect the amount of excess free asphalt that is precipitated from the asphalt binder under high temperature conditions.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.

Claims (9)

1. The utility model provides a test device of evaluation bituminous mixture pitch quantity, includes stoving case (10), its characterized in that: one side of the drying box (10) is provided with a rotating device, the rotating device is connected with a rotating rod (3), one end of the rotating rod (3) penetrates 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 with a roller (6), the bottom in the drying box (10) is provided with a supporting device, the lower end of the roller (6) is abutted against the upper end of the supporting device, three stirring barrels (2) are arranged in the roller (6), six spring clamping blocks (1) are fixed on the side wall of one circle in the roller (6) at equal intervals, two adjacent spring clamping blocks (1) are in one group, one end of each spring clamping block (1) in the same group is abutted against the side wall of one stirring barrel (2), a fixing ring (26) is fixed on the side wall of one circle in the stirring barrel (2), six stirring plates (24) are fixed on the side wall of one circle in the fixing ring (26) at equal intervals, the lower end four corners of the drying box (10) are all fixed with connecting frames (23), and the connecting frames (23) are provided with bearing devices.

2. The test device for evaluating the asphalt dosage of the asphalt mixture according to claim 1, characterized in that: rotating device is including fixing mounting bracket (19) in stoving case (10) one side, one side of mounting bracket (19) is fixed with speed change mechanism (18), the upper end of speed change mechanism (18) is fixed with driving motor (17), the output shaft of driving motor (17) is connected on speed change mechanism (18), and the other end of dwang (3) is connected on speed change mechanism (18).

3. The test device for evaluating the asphalt dosage of the asphalt mixture according to claim 1, characterized in that: the supporting device comprises four mounting plates (8) fixed at the bottom in the drying box (10) through eight first screws (9), two supporting frames (5) are fixed at the upper ends of the mounting plates (8), supporting wheels (4) are mounted on the supporting frames (5), and the upper ends of the two supporting wheels (4) are abutted to the lower ends of the rollers (6).

4. The test device for evaluating the asphalt dosage of the asphalt mixture according to claim 1, characterized in that: the bearing device comprises a screw rod (20) penetrating through the connecting frame (23), a thread through hole is formed in the lower end of the connecting frame (23), the thread through hole penetrates through the upper end of the screw rod (20), the lower end of the screw rod (20) is rotatably connected with a supporting seat (22), and a nut is sleeved on the upper end thread of the screw rod (20).

5. The test device for evaluating the asphalt dosage of the asphalt mixture according to claim 1, characterized in that: be equipped with external screw thread (16) on the a week lateral wall of agitator (2), one side of agitator (2) is equipped with sealed lid (15), one side of sealed lid (15) is equipped with the recess, the one end of agitator (2) extends to in the recess, be equipped with the internal thread that corresponds with external screw thread (16) on the a week lateral wall in the recess, external screw thread (16) and internal thread are mutually screwed, the other end of sealed lid (15) is fixed with handle (14).

6. The test device for evaluating the asphalt dosage of the asphalt mixture according to claim 1, characterized in that: the one end of dwang (3) is fixed with connecting plate (25), be equipped with four through-holes on connecting plate (25), one side of cylinder (6) is equipped with four screw thread blind holes that correspond with the through-hole, it is equipped with the second screw to run through in the through-hole, the one end of second screw extends to in the screw thread blind hole.

7. The test device for evaluating the asphalt dosage of the asphalt mixture according to claim 1, characterized in that: one side of the drying box (10) is provided with a first opening, one side of the first opening is hinged with a sealing cover (12), and one side of the sealing cover (12) is provided with a handle (13).

8. The test device for evaluating the asphalt dosage of the asphalt mixture according to claim 1, characterized in that: heaters (7) are fixed on the opposite side walls in the drying box (10).

9. The test device for evaluating the asphalt dosage of the asphalt mixture according to claim 1, characterized in that: two supporting pieces (21) are fixed on two sides of the lower end of the drying box (10), and one sides of the four supporting pieces (21) are fixed on one sides of the four connecting frames (23) respectively.

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