Methods for sampling and testing aggregates: method 16; angularity number

This Standard sets out the method for determining the angularity number of an aggregate. The angularity number is a measure of relative angularity based on the percentage voids in an aggregate after compaction in the prescribed manner. The least angular (most rounded) aggregates have about 33 per cent voids. The angularity number is defined as the amount by which the percentage of voids exceeds 33. The angularity number ranges from 0 to about 12. Since considerably more compactive effort is used in the angularity test than in the determination of unit mass (see AS 1141.4), the results of the two tests are different. Also, weaker aggregates may be crushed during compaction, and the angularity number test does not apply to any aggregate that breaks down under test. (a) The standard was approved on behalf of the Council of Standards Australia on 30 June 2007 and supersedes AS 1141.16:1995

  • Availability:
  • Corporate Authors:


  • Publication Date: 2007-9-12


  • English

Media Info

  • Pagination: 8P
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01094940
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 0733783848
  • Files: ITRD, ATRI
  • Created Date: Apr 25 2008 8:15AM