Los Angeles Abrasion Tester Steel Balls Abrasive Charges Test Machine

Common abrasion tests for aggregates used in road construction are the Los Angeles abrasion test,Deval abrasion test and the Dorry's abrasion test, but our company recommends the Los Angeles Abrasion Test because of the good correlation between the results and the pavement performance.
The machine is mainly composed of cylinder, sealing cover, bracket, mandrel, gearbox, motor, counter and other components.
Electrical controlling system has the functions of starting, inching controlling, stopping and timing.

Procedure for Los Angeles abrasion test:
1. before the test drive must check whether the line is intact, press the start button, drum rotation is normal (according to the direction of the arrow on the cylinder, if the direction of rotation is reversed, the input of 380V in the two fire switch that is changed) at the same time will be zero LED display, and then set the pre-set toggle switch to the number of times that the test, press the start button to start work. If there are special circumstances, please press the "pause" key, the machine stops working, to be troubleshooting and then press the "pause" key again, the machine resumes work.
2. will test the gravel material and steel ball into the cylinder, sealing cover, tighten the screws, start the instrument rotates 500 revolutions after the automatic stop. At this time, the discharge port in the upper position, easy to open the sealing cover, open the cover, press the key, so that the discharge port to the bottom, release the key to stop the test cylinder, take out the test piece.
3. Use 2mm diameter round hole sieve or side length 1.7mm square hole sieve, sieve away the stone chips in the specimen, use water to rinse the debris left on the sieve, drying, constant weight, accurate weighing.
Precautions for Los Angeles abrasion test:
1. The equipment should not be operated and used in magnetic or electric fields, and shielding measures must be taken to prevent damage to the instrument or reduce the measurement accuracy.
2. Before use, it must be run without load to ensure that it can be loaded for use. Lubricate before use, wipe clean after use.
3. not allowed to arbitrarily disassemble or disassemble the use of the need to develop new features or renovation and renewal, according to the hierarchy of management authority, to fulfil the approval procedures before implementation.
4. often for the maintenance and maintenance of equipment, and stored in a dry and ventilated place, to be used for a long time instrumentation, should be regularly powered on to prevent moisture and mould damage to the instrument and its components

The test sample should consist of clean aggregates which has been dried in an oven at 105 to 110ºC to a substantially constant weight and should conform to one of the gradings shown in the table below: 

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