AASHTO - American Association of State Highway and Transportation Officials
Scope
This test method covers the determination of bulk density (??unit weight??) of aggregate in a compacted or loose condition@ and calculated voids between particles in fine@ coarse@ or mixed aggregates based on the same determination. This test method is applicable to aggregates not exceeding 125 mm (5 in.) in nominal maximum size.Note 1??Unit weight is the traditional terminology used to describe the property determined by this test method@ which is weight per unit volume (more correctly@ mass per unit volume or density).The values stated in either inch?Cpound units or acceptable metric units are to be regarded separately as standard@ as appropriate for a specification with which this test method is used. An exception is with regard to sieve sizes and nominal size of aggregate@ in which the metric values are the standard as stated in M 92. Within the text@ inch?Cpound units are shown in brackets. The values stated in each system may not be exact equivalents; therefore@ each system must be used independently of the other@ without combining values in any way.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.