1.1 This test method covers the particle size and mass analysis of natural and man-made riprap and related materials, including filter stone or coarse bedding materials.

1.2 This test method is applicable for graded riprap stone, both naturally occurring and quarried. It is applicable for sizes 3 in. (75 mm) and above, with the upper size limited only by equipment available for handling and weighing of the individual particles. This test method is also applicable for evaluation, sizing, and mass determinations of man-made riprap materials, such as recycled broken concrete.

1.3 Three alternate procedures are provided. The procedure used shall be as indicated in the specification for the material being tested. If no procedure is specified, the choice should be selected and confirmed by the testing agency. The procedures and referenced sections are:

1.3.1 Test Method A: Size-Mass Grading—Grading of the material based on both the size and mass. See 9.2.

1.3.2 Test Method B: Size-Range Grading—Determination of the grading of the material based on the sizes of the individual particles. See 9.3.

1.3.3 Test Method C: Mass-Range Grading—Determination of the grading of the material based on the mass of the individual particles. See 9.4.

1.4 During the measurements using the methods in accordance with 1.3.1, 1.3.2, or 1.3.3, other attributes, such as the amount of slab pieces, can be determined during testing.

1.5 The values stated in inch-pound units are to be regarded as the standard. The metric equivalents of inch-pound units given in parentheses may be approximate.

1.6 This standard does not purport to address all of the safety concerns, if any, 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. Specific precautionary statements are given in Section 7.