Aggregate accelerated polishing test device

Abstract

The utility model discloses an aggregate accelerated polishing test device which comprises a frame with a top opening, a test mold groove fixed on an inner bottom plate of the frame, a test mold arranged in the test mold groove, and a frame top plate, a round hole arranged on the frame top plate, a motor penetrating through the round hole, a fixed plate on the motor supported on the frame top plate and fixedly connected with the frame top plate, the output end of the motor is connected with a transmission rod, the bottom end of the transmission rod is fixedly connected with a grinding wheel, and the frame top plate can be fixed to the top of the frame. The device is only composed of the frame, the test mold groove, the motor, the transmission rod, the grinding wheel, the test mold and the frame top plate, more aggregate can be contained in the test mold, the test can be carried out according to the designed aggregate grading, the device is reasonable in design, simple in structure and easy to operate, and the accelerated polishing test of the aggregate is more convenient to implement by utilizing the device.

Description

Technical Field

[0001] This utility model relates to a test device, and more particularly to a test device for accelerated polishing of aggregates. Background Technology

[0002] Aggregates are granular materials used in building materials such as concrete, asphalt mixtures, and mortar, typically composed of natural or artificial stones, sand, gravel, slag, etc. When aggregates are used in road surfaces, their abrasion resistance is a key factor affecting the road's skid resistance. Therefore, the abrasion resistance of aggregates is an important basis for aggregate selection in road material design.

[0003] Currently, the accelerated polishing test (APPT) of aggregates is mainly used to test their abrasion resistance, which requires an APT machine. However, existing APT machines for aggregates have complex structures and small specimen sizes, making it inconvenient to measure parameters such as the coefficient of friction after accelerated polishing. Furthermore, existing APT machines can only accommodate aggregates of 9.5mm–13.2mm or 4.75mm–9.5mm in diameter per specimen, failing to reflect the impact of the design gradation on the abrasion resistance and anti-slip properties of the aggregates before and after polishing. Summary of the Invention

[0004] The purpose of this invention is to provide an accelerated grinding test device for aggregates. This device facilitates accelerated grinding tests on aggregates, allows the test mold to hold more aggregates, and enables testing according to the designed aggregate gradation.

[0005] The technical solution of this utility model is as follows: an accelerated grinding test device for aggregates includes a frame with a top opening, a mold slot fixed in the inner bottom plate of the frame, a mold being installed in the mold slot, a frame top plate with a circular hole in the frame top plate, a motor passing through the circular hole, a fixing plate on the motor supporting the frame top plate and fixedly connected thereto, a transmission rod connected to the output end of the motor, a grinding wheel fixedly connected to the bottom end of the transmission rod, and the frame top plate being fixed to the top of the frame.

[0006] In the aforementioned aggregate accelerated polishing test device, the frame is made of metal, and the test mold slot is welded to the bottom plate inside the frame.

[0007] In the aforementioned aggregate accelerated polishing test device, both the test mold groove and the test mold are disc-shaped, and the outer diameter of the test mold is consistent with the inner diameter of the test mold groove.

[0008] In the aforementioned aggregate accelerated polishing test device, the fixing plate is supported on the top plate of the frame and fixedly connected to it by bolts.

[0009] In the aforementioned aggregate accelerated polishing test device, the top of the frame is provided with a flange plate that extends horizontally outward, and the top plate of the frame and the flange plate are fixedly connected by screws.

[0010] In the aforementioned aggregate accelerated polishing test device, the diameter of the grinding wheel and the test mold is 10cm to 20cm.

[0011] In the aforementioned aggregate accelerated polishing test device, a handle is provided at the tail end of the motor.

[0012] In the aforementioned aggregate accelerated grinding test device, a polygonal countersunk hole is provided at the center of the surface of the grinding wheel, and a countersunk hole is provided at the center of its bottom surface. The countersunk hole and the polygonal countersunk hole are connected by a through hole. A polygonal connector is provided at the head end of the transmission rod. The polygonal connector extends into the polygonal countersunk hole. A locking screw extends from the countersunk hole through the through hole into the threaded hole inside the polygonal connector, thereby fixing the grinding wheel and the transmission rod together.

[0013] The beneficial effects of this utility model are as follows: Compared with the prior art, the device of this utility model consists only of components such as a frame, a mold slot, a motor, a transmission rod, a grinding wheel, a mold, and a frame top plate. The mold can hold more aggregate and can be tested according to the designed aggregate gradation. The device is reasonably designed, simple in structure, and easy to operate. It is more convenient to carry out accelerated polishing tests on aggregate using this device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of this utility model after the aggregate is placed;

[0016] Figure 3 for Figure 1 A top-view structural diagram;

[0017] Figure 4 This is a drawing of the prototype mold.

[0018] Figure 5 This is a schematic diagram of the connection structure between the transmission rod and the grinding wheel.

[0019] Reference numerals: 1. Frame, 2. Test mold slot, 3. Motor, 4. Handle, 5. Fixing plate, 6. Transmission rod, 7. Grinding wheel, 8. Test mold, 9. Aggregate, 10. Epoxy resin mortar, 11. Frame top plate, 12. Flange plate, 13-Polygonal countersunk hole, 14-Countersunk hole, 15-Polygonal connector, 16-Locking screw. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0021] An embodiment of this utility model: A material accelerated polishing test device includes a frame 1 with a top opening, a test mold groove 2 fixed at the center of the inner bottom plate of the frame 1, a test mold 8 inserted into the test mold groove 2, and a frame top plate 11. A circular hole is opened at the center of the frame top plate 11, through which a motor 3 is inserted. Multiple fixing plates 5 on the outer wall of the motor 3 are supported on the frame top plate 11 and fixedly connected to the frame top plate 11. A transmission rod 6 is connected to the output end of the motor 3, and a grinding wheel 7 is fixedly connected to the bottom end of the transmission rod 6. The frame top plate 11 can be fixed to the top of the frame 1.

[0022] During use, first, aggregate 9 is placed in mold 8. After aggregate 9 has cured, mold 8 is installed in mold slot 2. Then, the frame top plate 11, which is equipped with motor 3, transmission rod 6, and grinding wheel 7, is placed on top of frame 1 and fixed to frame 1. Motor 3 is started, and the output shaft of motor 3 drives transmission rod 6 to rotate, which in turn drives grinding wheel 7 to rotate, thereby achieving grinding of aggregate 9.

[0023] The frame 1 is made of metal to improve the structural strength of the main body of the device, and the test mold groove 2 is welded to the inner bottom plate of the frame 1.

[0024] Both the test mold slot 2 and the test mold 8 are disc-shaped. The outer diameter of the test mold 8 is the same as the inner diameter of the test mold slot 2, ensuring that the test mold 8 will not wobble after being installed in the test mold slot 2.

[0025] The fixing plate 5 is supported on the top plate 11 of the frame and is fixed to it by bolts, which makes disassembly relatively convenient.

[0026] The top of the frame 1 is provided with a flange plate 12 that extends horizontally outward. The top plate 11 of the frame and the flange plate 12 are fixedly connected by screws, thereby effectively fixing the top plate 11 of the frame and the frame 1 together.

[0027] The diameters of the grinding wheel 7 and the test mold 8 are 10cm to 20cm.

[0028] The motor 3 is equipped with a handle 4 at its tail end for easy handling.

[0029] The grinding wheel 7 has a polygonal countersunk hole 13 at the center of its surface and a countersunk hole 14 at the center of its bottom surface. The countersunk hole 14 and the polygonal countersunk hole 13 are connected by a through hole. The head end of the transmission rod 6 is provided with a polygonal connector 15, which extends into the polygonal countersunk hole 13. The locking screw 16 extends from the countersunk hole 14 through the through hole into the threaded hole inside the polygonal connector 15, thus fixing the grinding wheel 7 and the transmission rod 6 together. This structure can achieve a fixed connection between the grinding wheel 7 and the transmission rod 6, and it is also convenient to replace the grinding wheel when the grinding wheel 7 is severely worn.

[0030] The specific test method and steps for conducting accelerated polishing tests on aggregates using the device of this invention are as follows:

[0031] The first step is to place the dried and clean single-size coarse aggregate or designed gradation aggregate 9 into the mold 8 and vibrate the mold 8 to make the aggregate 9 more compact.

[0032] The second step is to use a small putty knife to fill the mixed epoxy resin mortar 10 into the test mold 8, and fill it as densely as possible, but without touching the aggregate 9. Then, use a hot putty knife to scrape off the excess epoxy resin mortar 10 on the test mold 8, and repeatedly smooth the surface so that the filled epoxy resin mortar 10 is flush with the top of the test mold 8.

[0033] The third step is to place the mold 8 containing aggregate 9 and epoxy resin mortar 10 for curing for 3 hours, and then remove it and let it cool naturally for 9 hours.

[0034] The fourth step is to place the mold 8 containing aggregate 9 and epoxy resin mortar 10 into the mold trough 2.

[0035] Fifth step, lift the motor 3 with handle 4 so that the motor 3 passes through the round hole on the top plate 11 of the frame. Multiple fixing plates 5 on the outer wall of the motor 3 are supported on the top plate 11 of the frame. The fixing plates 5 and the top plate 11 of the frame are fixed together with bolts. The output shaft of the motor 3 is connected to the transmission rod 6, and the grinding wheel 7 is fixedly connected to the transmission rod 6. Then lower the top plate 11 of the frame so that the grinding wheel 7 is close to and aligned with the test mold 8. At the same time, the top plate 11 of the frame is just supported on the top of the frame 1. The top plate 11 of the frame and the frame 1 are fixed together with screws.

[0036] Step 6: Turn on the power to motor 3, so that motor 3 drives transmission rod 6 and grinding wheel 7 to rotate, so that grinding wheel 7 grinds the aggregate 9 in test mold 8.

[0037] Step 7: After the motor 3 has rotated to the designed time or number of revolutions, turn off the power to the motor 3, remove the top plate 11 of the frame, lift the motor 3 through the handle 4, take out the test mold 8, and then conduct other subsequent tests such as the anti-slip coefficient measurement.

Claims

1. An accelerated grinding test device for aggregates, characterized in that: The frame (1) includes a frame with a top opening. A test mold slot (2) is fixed to the inner bottom plate of the frame (1). A test mold (8) is installed in the test mold slot (2). The frame also includes a frame top plate (11). A round hole is opened on the frame top plate (11). A motor (3) is inserted through the round hole. A fixing plate (5) on the motor (3) is supported on the frame top plate (11) and fixedly connected to it. A transmission rod (6) is connected to the output end of the motor (3). A grinding wheel (7) is fixedly connected to the bottom end of the transmission rod (6). The frame top plate (11) can be fixed on the top of the frame (1).

2. The aggregate accelerated polishing test device according to claim 1, characterized in that: The frame (1) is made of metal, and the trial mold groove (2) is welded to the inner bottom plate of the frame (1).

3. The aggregate accelerated polishing test device according to claim 1, characterized in that: Both the test mold groove (2) and the test mold (8) are disc-shaped, and the outer diameter of the test mold (8) is the same as the inner diameter of the test mold groove (2).

4. The aggregate accelerated polishing test device according to claim 1, characterized in that: The fixing plate (5) is supported on the top plate (11) of the frame and is fixedly connected to it by bolts.

5. The aggregate accelerated polishing test device according to claim 1, characterized in that: The frame (1) has a flange plate (12) extending horizontally outward at the top, and the top plate (11) of the frame and the flange plate (12) are fixedly connected by screws.

6. The aggregate accelerated polishing test device according to claim 1, characterized in that: The diameter of the grinding wheel (7) and the test mold (8) is 10cm to 20cm.

7. The aggregate accelerated polishing test device according to claim 1, characterized in that: The motor (3) is equipped with a handle (4) at its tail end.

8. The aggregate accelerated polishing test device according to claim 1, characterized in that: The grinding wheel (7) has a polygonal countersunk hole (13) at the center of its surface and a countersunk hole (14) at the center of its bottom surface. The countersunk hole (14) and the polygonal countersunk hole (13) are connected by a through hole. The head end of the transmission rod (6) is provided with a polygonal connector (15). The polygonal connector (15) extends into the polygonal countersunk hole (13). The locking screw (16) extends from the countersunk hole (14) through the through hole into the threaded hole inside the polygonal connector (15) to fix the grinding wheel (7) and the transmission rod (6) together.

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