1.1 This test method covers the determination of the time of setting of shotcrete, either in place or in shot panels, by means of penetration resistance measurements.

1.2 The values stated in inch-pound units are to be regarded as the standard.

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