Rock
Hardness
The Total Hardness test was developed to make reliable predictions of TBM performance. The Total Hardness is a composite index incorporating both a measure of rock hardness and rock abrasivity. Total Hardness is calculated from the results of a Schmidt Hammer Hardness and a Modified Taber Abrasion Hardness.
1
A minimum of 6 in of core,; 8 in of core preferred
total, hardness
Atlanta
770.645.6575
Boston
978.635.0424
Chicago
224.676.1371
New York
212.566.6630
info@geotesting.com