Machine to determine the accelerated polishing coefficient (A.P.C.)
Standards EN 1097-8; NLT 174; BS 812:114; NF P18-575; ASTM E303
The wear value of an aggregate provides a measurement of resistance to the wear produced by the tyres of a vehicle in similar conditions to those that occur on a road surface. Vehicle tyres passing over a road surface causes wear to the aggregate, this wear condition is one of the main factors that affect skid strength. The actual relationship between PSV and skid resistance will vary depending on the traffic conditions, the type of surface and other factors. The PSV test is performed in two stages. The accelerated sample polishing test, followed by wear measurement with the friction test.The machine consists of a wheel that turns at 320 rpm. There are 14 sample holders on the perimeter of the wheel. A solid rubber wheel is housed in avertical position on the top part of the wheel, bearing on it with a force of 725 N. Two containers feed the abrasive material and water. The first container holds grain abrasive mixed with water and the second one holds powdered abrasive also mixed with water.
Both spill the material on the place where both wheels meet. The machine is supplied complete with the wheel, a side plate, rubber rings, rubber tyre,transmission belt, abrasive material feeder, grain abrasive, powdered abrasive, tool set, set of 4 sample holder molds and two mold bases.
Tyre speed: 315 to 325 rpm.
Power supply: 220/380 V. 50 Hz.
Dimensions: 1520 x 720 x 740 mm.
Weight: 175 kg.