SEMI-CRUSHED RIVER GRAVEL AS A BASECOURSE AGGREGATE. NEW ZEALAND ROADING SYMPOSIUM 1987. VOLUME 1

The performance of coarsely graded, semicrushed river gravel (crusher run river gravel) is investigated when used as basecourse aggregate and compacted according to NRB B/2 pavement construction specification. It is compared with the performance of more finely graded derivatives prepared by adding fixed percentages of fine pumice sand to the original aggregate. Primary compaction is shown to leave this type of aggregate in an unstable state. During the trafficking period, stability was observed to develop faster in finer graded aggregates. Taking surface roughness into consideration as well, the optimum grading for this material is concluded to contain between 4% and 6% of fines smaller than 75 microns. Consideration is also given to specification and production changes which are likely to be required if such aggregate is to be crushed from alluvial straighthaul. For the covering abstract of the symposium see IRRD 810782. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0477071562
• Corporate Authors:

  National Roads Board, New Zealand

  P.O. Box 12-041
  Wellington,   New Zealand 
• Authors:
  • Monk, R B
• Publication Date: 1987

Media Info

• Features: References;
• Pagination: p. 181-193
• Serial:
  • Publication of: UNITED NATIONS
  • Publisher: United Nations
  • ISSN: 0252-4392

Subject/Index Terms

• TRT Terms: Alluvium; Base course (Pavements); Coarse aggregates; Compaction; Conferences; Fines (Materials); Gravel; Performance; Rivers
• Uncontrolled Terms: Crushed gravel
• Geographic Terms: New Zealand
• ITRD Terms: 4577: Aggregate; 2990: Basecourse; 4559: Coarse aggregate; 3686: Compaction; 8525: Conference; 4565: Crusher run aggregate; 9023: Fine (mater); 4575: Gravel; 1088: Inland waterway; 8079: New Zealand; 6200: Particle size distribution; 5930: Stability; 755: Traffic
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00476381
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 0-477-07156-2
• Files: ITRD, TRIS
• Created Date: Sep 30 1988 12:00AM