scope:

The purpose of this standard is to identify the presence of harmful clays of the smectite group (poor minus 75-μm material) and to provide an indication of the surface activity of the aggregate.

This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety concerns associated with its use. It is the responsibility of the user of this procedure to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.