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September/October 2010

Rock Abrasiveness

The abrasiveness of rock plays a crucial role in the performance of any mechanical excavation machines because overall costs are affected by the rate of cutting tool replacement and/or repair and machine downtime. The need for a standard that assists the civil and mining industries in quantifying rock abrasiveness properly and uniformly has been answered by a new ASTM International standard.

D7625, Test Method for Laboratory Determination of Abrasiveness of Rock Using the CERCHAR Method, was developed by Subcommittee D18.12 on Rock Mechanics, part of ASTM International Committee D18 on Soil and Rock.

“Most mechanical excavation machines are capital-intensive and site-specific, especially regarding rock abrasiveness,” says Hamid Nazeri, rock mechanics division manager, Advanced Terra Testing Inc., and a D18 member. “Because of this, a good estimation of application conditions plays an important role in maximizing a machine’s performance and excavation speed, which minimizes the cost of the project.”


Technical Information: Hamid Nazeri, Advanced Terra Testing Inc., Lakewood, Colo.

Phone: 303-232-8308

ASTM Staff: Robert Morgan

Phone: 610-832-9732