Cement-stabilized RAP mixture base asphalt pavement reflection crack test device

Abstract

The utility model belongs to the technical field of asphalt testing equipment, and particularly relates to a cement-stabilized RAP mixture base asphalt pavement reflection crack testing device which comprises a testing device body, two electric telescopic rods are arranged in the testing device body, a water inlet pipe for adding water into a water tank is connected to the testing device body, and a water outlet pipe for adding water into the water tank is connected to the testing device body. The telescopic ends of the two electric telescopic rods are jointly provided with a lifting plate, a water tank is arranged on the lifting plate, an analysis assembly for detecting asphalt reflection cracks is arranged at the bottom of the water tank, and an experiment assembly is arranged below the analysis assembly; through the cooperation of the adjusting device, the transmission mechanism and other structures, the stirring blades move up and down while rotating, the heating efficiency of water in the water tank is improved, and the test of the influence of the temperature of rainwater on an asphalt experiment body during rainfall in different regions is met by controlling the temperature of the water in the water tank; therefore, errors of experimental results can be reduced, and the accuracy of the experimental results is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of asphalt testing equipment, and in particular relates to a reflective crack testing device for asphalt pavement with a cement-stabilized RAP mixture base. Background Art

[0002] When reinforcing old concrete pavement, a layer of asphalt overlay is often added on the original pavement. When the tensile stress generated by the concrete displacement exceeds the tensile strength of the asphalt overlay, the overlay will crack. This type of crack is called reflective crack. At present, the blending ratio of factory-mixed hot recycled asphalt mixture RAP at home and abroad is mostly below 25%, and the application technology is relatively mature. However, due to the influence of different factors such as the source of RAP material, service life, recycling process, and pavement structure layer, it is necessary to use a cement-stabilized RAP mixture base asphalt pavement reflective crack test device to test the asphalt.

[0003] In a Chinese patent with authorization announcement number CN213148553U, a base asphalt pavement reflective crack expansion simulation device is disclosed, including a simulation box, which is mainly composed of a box body, a box cover and a base, and the box cover and the base are respectively arranged on the top and bottom of the box body, and can respectively carry out different influences on the test body under different pressure, temperature and humidity environments, thereby effectively ensuring the accuracy of the experimental data and making it more convenient to improve the construction of the base asphalt pavement; although the above-mentioned base asphalt pavement reflective crack expansion simulation device simulates the humidity of the asphalt pavement during rain by spraying the water inside the water tank onto the asphalt test body through a serpentine tube, the temperature of rainwater during rainfall in different regions is different, and the above-mentioned simulation device cannot control the temperature of the water sprayed from the serpentine tube, so that there are errors in the experimental results, affecting the detection results.

[0004] In order to solve the above problems, the present application proposes a reflective crack test device for asphalt pavement with cement-stabilized RAP mixture base. Utility Model Content

[0005] To solve the problems raised in the above background technology, the utility model provides a reflective crack test device for asphalt pavement with cement stabilized RAP mixture base, which can meet the test of the influence of rain temperature on asphalt test body during rainfall in different regions, reduce the error of test results, and increase the accuracy of test results.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] Cement stabilized RAP mixture base asphalt pavement reflective crack test device, including:

[0008] The test device body is provided with two electric telescopic rods inside the test device body, and a water inlet pipe for adding water into the water tank is connected to the test device body, and a lifting plate is provided at the telescopic ends of the two electric telescopic rods, and a water tank is provided on the lifting plate, and an analysis component for detecting asphalt reflective cracks is provided at the bottom of the water tank, and an experimental component is provided below the analysis component, and a serpentine pipe is provided at the bottom of the water tank;

[0009] An adjusting device is arranged inside the water tank, and the adjusting device includes a motor fixed on the water tank and an electric heating wire arranged inside the water tank. A main gear is fixed to the bottom of the motor, a sub-gear meshing with the main gear is arranged on one side of the main gear, a stirring blade for stirring water is arranged below the sub-gear, and a transmission mechanism is arranged between the sub-gear and the water tank.

[0010] As a preferred embodiment of the reflective crack testing device for asphalt pavement with cement-stabilized RAP mixture base of the utility model, the transmission mechanism includes a lifting rod inserted on a water tank, a rotatable transmission block is provided at the bottom of the lifting rod, a connecting rod is fixed to the bottom of the transmission block, a sub-gear is fixed to the outside of the connecting rod, the bottom of the lifting rod passes through the water tank and is fixed to the top of the transmission block, and the height of the main gear is greater than the height of the sub-gear.

[0011] As a preferred embodiment of the reflective crack testing device for asphalt pavement with cement-stabilized RAP mixture base of the utility model, an extension rod is fixed to the bottom of the sub-gear, and an end of the extension rod away from the sub-gear is fixed to the stirring blade.

[0012] As a preferred embodiment of the reflective crack testing device for asphalt pavement with cement-stabilized RAP mixture base of the utility model, a limit rod is fixed on the inner wall of the water tank, a lifting groove is provided on the outer wall of the transmission block, the end of the limit rod away from the water tank is inserted into the lifting groove, and the lifting groove is composed of half-circle thread grooves symmetrical at both ends connected end to end.

[0013] As a preferred embodiment of the reflective crack testing device for asphalt pavement with cement-stabilized RAP mixture base of the utility model, a baffle is fixed to the top of the lifting rod, a spring is arranged between the baffle and the water tank, the spring is sleeved on the outside of the lifting rod, and the free end of the spring is fixed to the top of the water tank.

[0014] As a preferred embodiment of the reflective crack testing device for asphalt pavement with cement-stabilized RAP mixture base of the utility model, a connecting pipe is provided at one end of the water tank, a detachable filter plate is provided inside the connecting pipe, the bottom end of the water inlet pipe can be inserted into the connecting pipe, and the water entering the water tank can be filtered through the filter plate.

[0015] As a preferred embodiment of the reflective crack testing device for asphalt pavement with cement-stabilized RAP mixture base of the utility model, sliders are provided at both ends of the filter plate, a slide groove matched with the slider is provided on the inner wall of the connecting pipe, and an annular groove matched with the slider is provided at the bottom of the slide groove.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. Through the coordination of the adjustment device and the transmission mechanism, the stirring blades rotate and move up and down at the same time, which improves the efficiency of water heating inside the water tank. By controlling the temperature of the water inside the water tank, the test of the influence of the temperature of rainwater on the asphalt test body during rainfall in different regions can be met, thereby greatly reducing the error of the experimental results and increasing the accuracy of the experimental results;

[0018] 2. By rotating the filter plate, the filter plate drives the slider to move, and the slider moves along the annular groove. After the filter plate moves to the bottom of the slide groove, pull the filter plate upward to move the filter plate to the outside of the connecting pipe, which is convenient and quick to replace and clean the filter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 For this utility model Figure 1 A schematic diagram of the cross-sectional structure of;

[0022] Figure 3 For this utility model Figure 2 The structural diagram of the middle regulating device;

[0023] Figure 4 For this utility model Figure 3 The structural diagram of the middle gear;

[0024] Figure 5 For this utility model Figure 3 Schematic diagram of the structure of the connecting pipe.

[0025] In the figure: 1. Test device body; 2. Water tank; 3. Analysis component; 4. Experimental component; 5. Electric telescopic rod; 6. Adjustment device; 601. Motor; 602. Main gear; 603. Lifting rod; 604. Baffle; 605. Transmission block; 606. Connecting rod; 607. Sub-gear; 608. Extension rod; 609. Stirring blade; 610. Heating wire; 611. Limit rod; 612. Spring; 7. Connecting pipe; 8. Filter plate; 9. Water inlet pipe. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] The utility model provides Figure 1 The reflective crack test device for asphalt pavement with cement stabilized RAP mixture base shown in the figure includes:

[0028] A test device body 1, wherein two electric telescopic rods 5 are arranged inside the test device body 1, and a water inlet pipe 9 for adding water to the water tank 2 is connected to the test device body 1, and a lifting plate is arranged at the telescopic ends of the two electric telescopic rods 5, and a water tank 2 is arranged on the lifting plate, and an analysis component 3 for detecting asphalt reflective cracks is arranged at the bottom of the water tank 2, and an experimental component 4 is arranged below the analysis component 3, and a serpentine tube is arranged at the bottom of the water tank 2, and the serpentine tube can spray water in the water tank onto the asphalt test body, and a cover plate is arranged on the top of the test device body 1, and the water inlet pipe 9 is installed on the cover plate; wherein, the specific structure and working principle of the analysis component 3 and the experimental component 4 are both prior arts, and specific reference is made to the comparative document (authorization announcement number is CN213148553U, and the name is a base asphalt pavement reflective crack expansion simulation device).

[0029] As can be seen from the above, when in use, water is first added to the water tank 2 through the water inlet pipe 9, and then the water inside the water tank 2 is sprayed onto the asphalt test body on the experimental component 4 through the serpentine tube to simulate rainfall, and then the asphalt test body is tested through the analysis component 3, thereby completing the test of the asphalt test body.

[0030] refer to Figure 1-Figure 5As shown, the inside of the water tank 2 is provided with a regulating device 6, which includes a motor 601 fixed on the water tank 2 and an electric heating wire 610 arranged inside the water tank 2, a main gear 602 is fixed to the bottom of the motor 601, a sub-gear 607 meshing with the main gear 602 is arranged on one side, a stirring blade 609 for stirring water is arranged below the sub-gear 607, and a transmission mechanism is arranged between the sub-gear 607 and the water tank 2;

[0031] The transmission mechanism includes a lifting rod 603 inserted on the water tank 2, a rotatable transmission block 605 is arranged at the bottom of the lifting rod 603, a connecting rod 606 is fixed at the bottom of the transmission block 605, and a sub-gear 607 is fixed to the outside of the connecting rod 606. The bottom of the lifting rod 603 passes through the water tank 2 and is fixed to the top of the transmission block 605. The height of the main gear 602 is greater than the height of the sub-gear 607; an extension rod 608 is fixed at the bottom of the sub-gear 607. 8 The end away from the sub-gear 607 is fixed to the stirring blade 609; a limit rod 611 is fixed to the inner wall of the water tank 2, and a lifting groove is provided on the outer wall of the transmission block 605. The end of the limit rod 611 away from the water tank 2 is inserted into the lifting groove, and the lifting groove is composed of half-circle thread grooves symmetrical at both ends connected end to end; a baffle 604 is fixed to the top of the lifting rod 603, and a spring 612 is provided between the baffle 604 and the water tank 2, and the free end of the spring 612 is fixed to the top of the water tank 2.

[0032] By adopting the above technical solution:

[0033] When in use, the water inside the water tank 2 is heated by the electric heating wire 610, and then the main gear 602 is driven to rotate by the motor 601, and the main gear 602 drives the sub-gear 607 meshing with it to rotate, and the sub-gear 607 drives the connecting rod 606 to rotate, and the connecting rod 606 drives the stirring blade 609 to rotate through the extension rod 608, so that the stirring blade 609 stirs the water inside the water tank 2, thereby increasing the heating efficiency of the water inside the water tank 2;

[0034] At the same time, the transmission block 605 is driven to rotate through the connecting rod 606, so that the limit rod 611 moves along the lifting groove of the transmission block 605, and the limit rod 611 limits the transmission block 605, so that the transmission block 605 moves back and forth up and down, and the transmission block 605 drives the connecting rod 606 to move back and forth up and down. The connecting rod 606 drives the stirring blade 609 to move back and forth up and down through the extension rod 608, so that the stirring blade 609 rotates and moves up and down, thereby further improving the efficiency of heating the water inside the water tank 2. By controlling the temperature of the water body inside the water tank 2, the influence of the temperature of rainwater on the asphalt test body during rainfall in different regions can be met, so as to improve the test effect on the asphalt test body.

[0035] In addition, refer to Figure 1-Figure 5As shown, a connecting pipe 7 is provided at one end of the water tank 2, and a detachable filter plate 8 is provided inside the connecting pipe 7. The bottom end of the water inlet pipe 9 can be inserted into the connecting pipe 7, and the water entering the water tank 2 can be filtered through the filter plate 8; sliders are provided at both ends of the filter plate 8, and a slide groove matched with the slider is provided on the inner wall of the connecting pipe 7, and an annular groove matched with the slider is provided at the bottom of the slide groove.

[0036] By adopting the above technical solution:

[0037] When in use, the water tank 2 is driven up by the electric telescopic rod 5 and the lifting plate, so that the bottom end of the water inlet pipe 9 is inserted into the connecting pipe 7, and then water is added to the water tank 2 through the water inlet pipe 9. At this time, the filter plate 8 in the water inlet pipe 7 filters the water to remove impurities mixed in the water. After the water is added, the water tank 2 can be driven down by the electric telescopic rod 5 and the lifting plate to adjust the height of the water tank 2.

[0038] When the filter plate 8 needs to be cleaned, first open the cover on the top of the test device body 1, then rotate the filter plate 8, so that the filter plate 8 drives the slider to move, and the slider moves along the annular groove. After the filter plate 8 moves to the bottom of the slide groove, pull the filter plate 8 upward to move the filter plate 8 to the outside of the connecting pipe 7, so that people can replace and clean the filter plate 8 conveniently and quickly.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. Cement stabilized RAP mixture base asphalt pavement reflective crack test device, characterized in that: include: A test device body (1), wherein two electric telescopic rods (5) are arranged inside the test device body (1), and a water inlet pipe (9) for adding water to a water tank (2) is connected to the test device body (1), and a lifting plate is arranged at the telescopic ends of the two electric telescopic rods (5), and the lifting plate is arranged on the water tank (2), and an analysis component (3) for detecting asphalt reflective cracks is arranged at the bottom of the water tank (2), and an experimental component (4) is arranged below the analysis component (3); The water tank (2) is provided with an adjusting device (6) inside. The adjusting device (6) comprises a motor (601) fixed on the water tank (2) and an electric heating wire (610) arranged inside the water tank (2). A main gear (602) is fixed to the bottom of the motor (601). A secondary gear (607) meshing with the main gear (602) is provided on one side of the main gear (602). A stirring blade (609) for stirring water is provided below the secondary gear (607). A transmission mechanism is provided between the secondary gear (607) and the water tank (2).

2. The reflective crack test device for asphalt pavement with cement-stabilized RAP mixture base according to claim 1 is characterized by: The transmission mechanism comprises a lifting rod (603) inserted on the water tank (2), a rotatable transmission block (605) is arranged at the bottom of the lifting rod (603), a connecting rod (606) is fixed at the bottom of the transmission block (605), and a sub-gear (607) is fixed on the outside of the connecting rod (606).

3. The reflective crack test device for asphalt pavement with cement-stabilized RAP mixture base according to claim 1 is characterized by: An extension rod (608) is fixed to the bottom of the secondary gear (607), and one end of the extension rod (608) away from the secondary gear (607) is fixed to the stirring blade (609).

4. The reflective crack test device for asphalt pavement with cement-stabilized RAP mixture base according to claim 2, characterized in that: A limiting rod (611) is fixed on the inner wall of the water tank (2), and a lifting groove is provided on the outer wall of the transmission block (605), and one end of the limiting rod (611) away from the water tank (2) is inserted into the lifting groove.

5. The reflective crack test device for asphalt pavement with cement-stabilized RAP mixture base according to claim 2, characterized in that: A baffle (604) is fixed to the top of the lifting rod (603), and a spring (612) is provided between the baffle (604) and the water tank (2).

6. The reflective crack test device for asphalt pavement with cement-stabilized RAP mixture base according to claim 1, characterized in that: A connecting pipe (7) is provided at one end of the water tank (2), a detachable filter plate (8) is provided inside the connecting pipe (7), and the bottom end of the water inlet pipe (9) can be inserted into the connecting pipe (7).

7. The reflective crack test device for asphalt pavement with cement-stabilized RAP mixture base according to claim 6 is characterized by: Both ends of the filter plate (8) are provided with sliding blocks, the inner wall of the connecting pipe (7) is provided with a sliding groove matched with the sliding block, and the bottom of the sliding groove is provided with an annular groove matched with the sliding block.

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