Looseness resistance testing mold based on emulsified asphalt cold recycled mixture

Abstract

The utility model discloses an anti-loose test mould based on emulsified asphalt cold-recycled mixture, which comprises a base, a placing mould for placing the emulsified asphalt cold-recycled mixture and an anti-loose test component, the placing mould is arranged in the middle of the upper surface of the base, the anti-loose test component is arranged vertically above the placing mould, and the placing mould is arranged on the upper surface of the base. The anti-loosening testing assembly comprises a compression roller, and the compression roller rotates through a power unit to perform rotary compaction on the surface of the emulsified asphalt cold recycled mixture. The method comprises the following steps: compacting an emulsified asphalt cold-recycled mixture in a placing mold, curing a compression roller, testing the mass of the compression roller to be m1 after curing before abrasion, placing the compression roller on an abrasion instrument, ensuring that the compression roller is centered and well supported, enabling a hose grinding head to be in contact with the surface of the compression roller, abrading the compression roller for 15 minutes, and then immediately weighing m2, therefore, the anti-loosening capability of the emulsified asphalt cold-recycled mixture can be tested, and the device is simple in overall structure and convenient to use.

Description

Technical Field

[0001] The utility model particularly relates to an anti-loosening test mold based on emulsified asphalt cold recycled mixture. Background Art

[0002] Unraveling, a typical form of water damage in asphalt pavements, is a process in which the asphalt film falls off the aggregate surface under the action of water, losing its adhesion. After paving, emulsified cold-recycled asphalt mixtures need to be tested for their anti-unraveling capabilities. Unraveling tests are primarily used to measure the cohesive and adhesive development of emulsified cold-recycled asphalt mixtures, and further to evaluate the mixture's anti-unraveling capabilities and ability to develop early strength. To this end, we propose an anti-unraveling test mold for emulsified cold-recycled asphalt mixtures. Utility Model Content

[0003] The purpose of the utility model is to provide an anti-loosening test mold based on emulsified asphalt cold recycled mixture to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an anti-loosening test mold based on emulsified asphalt cold recycled mixture, comprising a base, a placing mold for placing the emulsified asphalt cold recycled mixture and an anti-loosening test component, the placing mold being centrally arranged on the upper surface of the base, the anti-loosening test component being arranged vertically above the placing mold, the anti-loosening test component comprising a pressure roller, which is rotated by a power unit to rotate and compact the emulsified asphalt cold recycled mixture.

[0005] Preferably, the anti-loosening test assembly further comprises a circular hole provided in the pressure roller, wherein a rotating shaft is inserted into the circular hole.

[0006] Preferably, both ends of the rotating shaft extend to the outside of the pressing roller through circular openings and are connected to two fixing clamping plates.

[0007] Preferably, the two fixing plates are L-shaped, and through holes are provided on the upper surfaces of the fixing plates, and bolts for installing the fixing plates are inserted into the through holes.

[0008] Preferably, the fixing splint is provided with a socket on the side facing the rotating shaft for inserting the rotating shaft.

[0009] Preferably, a shell is provided on the outside of the rotating shaft, the fixing clamps are installed on both sides of the shell, and the power unit includes a rotating rod provided on the upper surface of the shell.

[0010] Preferably, a base is provided on the lower surface of the base, and clamps for fixing the base are provided on both sides of the base.

[0011] The technical effects and advantages of the utility model are as follows: the anti-loosening test mold based on emulsified asphalt cold recycled mixture adopts road milling material, emulsified asphalt, cement and other mixed cold recycled mixtures, and the mixture is placed in the placement mold, the external power supply is started, the rotating rod is driven to rotate, and the rotating rod drives the shell to rotate, so that the pressure roller continuously rotates and rolls on the surface of the emulsified asphalt cold recycled mixture, and the emulsified asphalt cold recycled mixture is compacted in the placement mold, and after compaction, the pressure roller is cured. After curing, the mass of the pressure roller is tested before wear as m1, and the pressure roller is placed on the wear tester to ensure that it is centered and well supported, so that the hose grinding head contacts the surface of the pressure roller, and the pressure roller should be worn for 15 minutes, and then immediately weighed m2, so that the anti-loosening ability of the emulsified asphalt cold recycled mixture can be tested. The overall structure is simple and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic structural diagram of the pressure roller of the present utility model;

[0014] Figure 3 This is a schematic structural diagram of the housing of the present utility model;

[0015] Figure 4 This is an exploded view of the anti-loosening test assembly of the present invention.

[0016] In the figure: 1. Base; 2. Place the mold; 3. Press roller; 4. Round hole; 5. Rotating axis; 6. Fixed splint; 7. Through hole; 8. Socket; 9. Shell; 10. Rotating rod; 11. Base; 12. Clamp. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0018] In order to test the anti-loosening ability of emulsified asphalt cold recycled mixture, refer to Figure 1 、 Figure 2 and Figure 3As shown, it includes a base 1, a placement mold 2 for placing emulsified asphalt cold recycled mixture and an anti-loosening test component. The placement mold 2 is centrally arranged on the upper surface of the base 1, and the anti-loosening test component is arranged vertically above the placement mold 2. The anti-loosening test component includes a pressure roller 3. The pressure roller 3 is rotated by a power unit to rotate and compact the emulsified asphalt cold recycled mixture. The cold recycled mixture is mixed with road milling material, emulsified asphalt, aggregate (if necessary), cement, etc., and the mixture is placed in the placement mold 2. , start the external power supply, drive the rotating rod 10 to rotate, so that the rotating rod 10 drives the shell 9 to rotate, and let the pressure roller 3 continuously rotate and roll on the surface of the emulsified asphalt cold recycled mixture, and compact the emulsified asphalt cold recycled mixture in the placement mold 2. After compaction, the pressure roller 3 is cured. After curing, the mass of the pressure roller 3 is tested before wear, which is m1. The pressure roller 3 is placed on the abrasion tester to ensure that it is centered and well supported, so that the hose grinding head contacts the surface of the pressure roller 3. The pressure roller 3 should be worn for 15 minutes, and then weighed immediately m2.

[0019] In order to improve the stability of the overall device during the test process, refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the anti-loosening test assembly also includes a circular hole 4 defined within the pressure roller 3. A rotating shaft 5 is inserted into the circular hole 4. Both ends of the rotating shaft 5 extend through the openings of the circular hole 4 to the outside of the pressure roller 3 and are connected to two fixed clamps 6. When the pressure roller 3 contacts the surface of the emulsified cold recycled asphalt mixture, the circular hole 4 allows the pressure roller 3 to roll over the surface of the emulsified cold recycled asphalt mixture, thereby completing the compaction of the emulsified cold recycled asphalt mixture. The two fixed clamps 6 are L-shaped and have through-holes 7 defined on their upper surfaces. Bolts for mounting the fixed clamps 6 are inserted into these through-holes 7. These bolts allow the fixed clamps 6 to be mounted to the outside of the housing 9, improving the stability of the pressure roller 3 and allowing it to withstand more pressure during compaction. The bolts also facilitate the mounting of the fixed clamps 6 to the outside of the housing 9. Each of the fixed clamps 6, facing the rotating shaft 5, has a socket 8 for the rotating shaft 5, which facilitates the installation of the rotating shaft 5 within the pressure roller 3. A housing 9 is provided on the outside of the rotating shaft 5, and the fixed clamps 6 are installed on both sides of the housing 9. The power unit includes a rotating rod 10 provided on the upper surface of the housing 9. The end of the rotating rod 10 away from the housing 9 is connected to a power source. The power source drives the rotating rod 10 to rotate, allowing the housing 9 to drive the pressure roller 3 to rotate and compact the emulsified asphalt cold recycled mixture. A stepper motor can be used as the power source. A base 11 is provided on the lower surface of the base 1. Clamps 12 for fixing the base 1 are provided on both sides of the base 11. The base 1 is fixed by the clamps 12, which improve the stability of the entire device when the pressure roller 3 rotates and compacts.

[0020] The test steps are as follows:

[0021] (1) Use road milling material, emulsified asphalt, aggregate (if necessary), cement and other materials to mix cold recycled mixture, reduce it to about 2700g per portion, and form 3 rollers with a height of 70±5mm and a diameter of 150mm. Each group has 3 rollers;

[0022] (2) Place the sample in a 150mm rotary compaction mold and rotate and compact it 30 times. If the height of the roller 3 does not meet the requirement of 70+5mm, the quality of the recycled mixture needs to be readjusted;

[0023] (3) After compaction, the roller 3 is placed at 25 degrees Celsius for curing for 4 hours + 5 minutes;

[0024] (4) After curing, the mass of the pressure roller 3 is tested before wear and is m1;

[0025] (5) Place the roller 3 on the abrasion tester, ensuring that it is centered and well supported so that the hose abrasive head contacts the surface of the test piece. Allow the abrasive head (with the hose) to move freely vertically by 5 mm;

[0026] (6) The roller 3 should be worn for 15 minutes and then weighed immediately m2; if the roller 3 is worn for less than 15 minutes and decomposes too much, the test process is terminated;

[0027] (7) The percentage of loose mass loss should be calculated according to the following formula.

[0028]

[0029] Preliminary test results show that when the total mass loss of the sample is less than 5%, the mass loss of the sample repeatability test is within 0.5%.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention.

Claims

1. An anti-loosening test mold based on emulsified asphalt cold recycled mixture, characterized in that: The invention comprises a base (1), a placement mold (2) for placing an emulsified asphalt cold recycled mixture, and an anti-loosening test component, wherein the placement mold (2) is centrally arranged on the upper surface of the base (1), the anti-loosening test component is arranged vertically above the placement mold (2), and the anti-loosening test component comprises a pressure roller (3), and the pressure roller (3) is rotated by a power unit to rotate and compact the emulsified asphalt cold recycled mixture.

2. The anti-loosening test mold based on emulsified asphalt cold recycled mixture according to claim 1, characterized in that: The anti-loosening test assembly further comprises a circular hole (4) provided in the pressure roller (3), and a rotating shaft (5) is inserted into the circular hole (4).

3. The anti-loosening test mold based on emulsified asphalt cold recycled mixture according to claim 2, characterized in that: Both ends of the rotating shaft (5) extend to the outside of the pressing roller (3) through the circular hole (4) openings, and are connected to two fixed clamping plates (6).

4. The anti-loosening test mold based on emulsified asphalt cold recycled mixture according to claim 3, characterized in that: The two fixing clamps (6) are L-shaped, and a through hole (7) is provided on the upper surface of the fixing clamp (6), and a bolt for installing the fixing clamp (6) is inserted into the through hole (7).

5. The anti-loosening test mold based on emulsified asphalt cold recycled mixture according to claim 4, characterized in that: The fixed splint (6) is provided with a socket (8) on the side facing the rotating shaft (5) for inserting the rotating shaft (5).

6. The anti-loosening test mold based on emulsified asphalt cold recycled mixture according to claim 5, characterized in that: A housing (9) is provided outside the rotating shaft (5), the fixed clamping plates (6) are mounted on both sides of the housing (9), and the power unit includes a rotating rod (10) provided on the upper surface of the housing (9).

7. The anti-loosening test mold based on emulsified asphalt cold recycled mixture according to claim 1, characterized in that: A base (11) is provided on the lower surface of the base (1), and clamps (12) for fixing the base (1) are provided on both sides of the base (11).

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