The abrasive nature of rock is an important factor when designing appropria tetesting machinery. The impact on tool wear much depends on the machinery used for excavation. This includes all devices and tools that come into contact with the material being excavated. The technical way to determine rock abrasivity is to use an index laboratory test as well as LCPC.

The LCPC abrasivity testing device is based on the French standard P18-579and has been developed by the “Laboratoire Central des Ponts et Chausées”(LCPC).

The main principle behind the wear resistance coefficient of the German Wille rock grinder LCPC is to measure the weight loss of the steel plate rotating at 4500rpm for 5 minutes in 500gr rock. Previously, the rock was crushed into fragments with a diameter between 4 and 6.3mm. The Rockwell hardness of this steel (metal) plate is 60-75HRB. The ratio of weight loss of the board to the mass of the test material is defined as the wear resistance coefficient (ABR), in grams per ton.