Methods for sampling and testing aggregates: method 16: angularity number
This Standard sets out the method of the determination of 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 percent 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 sets 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.
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- The Standard was approved on 7 November 1994. It is superseded by AS 1141.16:2007.
- Publication Date: 1995-2
- Pagination: 4p
- Issue Number: AS 1141.16-1995
- TRT Terms: Aggregates; Compaction; Measuring instruments; Porosity; Standards; Statistical sampling; Test procedures
- ATRI Terms: Aggregate; Australian standard; Compaction; Measuring equipment; Porosity; Sampling; Test method
- Subject Areas: Data and Information Technology; Geotechnology;
- Accession Number: 01435591
- Record Type: Publication
- Source Agency: ARRB
- ISBN: 072629506X
- Files: ATRI
- Created Date: Aug 24 2012 7:06PM