2024 new standard aggregate accelerated polishing machine

Introduction

2024 new standard aggregate accelerated polishing machineIt is manufactured in accordance with the latest national industry standard JTG 3432-2024 "Test Code for Aggregates in Highway Engineering" T0321-2024 technical standard, and draws on the advantages of similar foreign models. The whole machine has a compact structure, uniform and accurate sand and water sliding, and is suitable for simulating the polishing effect of car tires on road surfaces indoors. By accelerating the polishing of the bone materials used in the road surface, the anti polishing performance of the aggregates can be measured,

structure

1. Transmission mechanism: including motor, pulley, rubber wheel assembly, etc., used to transmit power and change speed ratio.

2. Road wheel device: used for installing 14 test specimens.

3. Sand sliding device: composed of a sand storage hopper and a bracket, used for storing abrasives and controlling sand flow.

4. Water supply system: including water storage brackets, water supply vessels, flow meters, and water pipes, used to control water volume.

5. Load adjustment mechanism: including handwheel and cam, used to support the counterweight and adjust the pressure between the rubber wheel and the road.

6. Weighting device: including lever, counterweight, and sheath, used to ensure the specified pressure on the road wheel.

7. Trial mold, trial mold cover: used for making polished stone specimens.

8. Electrical control device: used to control the required number of rotations and working time of road wheels.

Installation and testing

2024 new standard aggregate accelerated polishing machineIt should be installed on a solid and stable cement concrete foundation and fixed with foot bolts. After installation, the horizontal position should be calibrated with a regular level first, and then the nut should be tightened.

After installation, install the test piece on the road wheel, connect the 380V power supply, turn on the power switch on the controller panel, and then press the start button. Rotate the load adjustment handwheel to slowly press the rubber wheel towards the road wheel, and check whether the road wheel is running normally. Adjust the gate of coarse and fine sand, check whether the feeding and loading rotate smoothly, and whether there is any abnormal noise. Then, the coarse and fine sand are separately loaded into the hopper, and the slip amount of the coarse and fine sand is determined by the gate. After adjustment, the position can be determined, and there is no need to adjust it again for the next test.

Install test piece

Using 12 pre molded specimens (2 specimens of 6 different types of stone), conduct two rounds of testing. Assign adjacent numbers to one type of aggregate, with standard specimens numbered 13 and 14. In each round, two specimens of the same type of stone are grouped into six groups in the order of 1-12. After arranging the other two standard specimens and the two specimens of the six groups of stones in the order of 1-14, install them on the road wheel at the positions specified in the table below.

Attention: Install standard specimens at positions 1 and 8 for each round.

During installation, a piece of asbestos gasket with a thickness of 1mm should be added between every two test pieces to simulate the cross-section of the test piece mold, but slightly lower than the height of the test piece by 1-2mm. Depending on the specific situation, this gasket can also be omitted or added excessively. Then tighten the outer end plate screws. Use a wooden mallet to strike the end plate while tightening all screws to prevent the specimen from breaking or loosening during the polishing process.