OFR 98-331 Estimating Los Angeles Degradation Value Using The Schmidt Rebound Hammer Along the Front Range, Colorado

A research study was conducted to determine if there are any relationships between field tests of rocks using a Schmidt Rebound Hammer and laboratory tests of rocks using the Los Angeles Degradation test. Results show limestone and andesite have an inverse relationship between the rebound number and the corresponding Los Angeles degradation value. The rebound number does not correlate well with granite, gneiss, quartzite, and sandstone. The Schmidt rebound hammer might be used in tests for crushed-stone mining operations, however, its effectiveness as a predictive tool must be assessed prior to operational use.

For more information, contact:
Bill Langer
blanger@usgs.gov
(303) 236-1249

U.S. Department of the Interior, U.S. Geological Survey
URL:http://rockyweb.cr.usgs.gov/frontrange/hammer/hammer.htm
Contact: Dan Knepper mailto:dknepper@usgs.gov
Updated: 07/26/200