EVALUATION OF NEW TEST PROCEDURES FOR DETERMINING BULK SPECIFIC GRAVITY OF FINE AGGREGATE BY AUTOMATED METHODS

Two automated methods were evaluated for determining the dry bulk specific gravity (Gsb) of fine aggregates: Thermolyne SSDetect and InstroTek CoreLok. Each proposed method was evaluated against the standard method described in AASHTO T-84. The evaluation was based on a round-robin study with 12 laboratories and six materials, four crushed fine and two uncrushed (natural) fine aggregate sources. The CoreLok and SSDetect methods of determining fine aggregate specific gravity offer significant timesavings over AASHTO T-84. Both the CoreLok and SSDetect methods generally produce Gsb results similar to AASHTO T-84. It is believed that AASHTO T-84 may not produce accurate results for angular materials with high dust contents. More frequent statistical differences exist between the CoreLok and SSDetect apparent specific gravity (Gsa) and water absorption results than those produced by AASHTO T-84. However, Gsa and water absorption are not used in volumetric calculations for hot-mix asphalt. SSDetect offers improved precision over AASHTO T-84. The precision of the CoreLok method is slightly worse than that of AASHTO T-84, but it is expected to improve as technicians become more familiar with the procedure.

• Record URL:
  https://doi.org/10.3141/1874-02
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=EVALUATION+OF+NEW+TEST+PROCEDURES+FOR+DETERMINING+BULK+SPECIFIC+GRAVITY+OF+FINE+AGGREGATE+BY+AUTOMATED+METHODS&author=B.+Prowell&author=N.+Baker&publication_year=2004
• Availability:
  • Find a library where document is available. Order URL: http://www.trb.org/Main/Public/Blurbs/155397.aspx
• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1874, Geology and Properties of Earth Materials 2004.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Prowell, B D
  • Baker, N V
• Publication Date: 2004

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 11-18
• Monograph Title: GEOLOGY AND PROPERTIES OF EARTH MATERIALS 2004
• Serial:
  • Transportation Research Record
  • Issue Number: 1874
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Automation; Crushed aggregates; Fine aggregates; Natural aggregates; Precision; Specific gravity; Test procedures
• Uncontrolled Terms: Time savings; Water absorption
• Subject Areas: Geotechnology; Highways; I36: Aggregates;

Filing Info

• Accession Number: 00983218
• Record Type: Publication
• ISBN: 0309094690
• Files: TRIS, TRB, ATRI
• Created Date: Dec 6 2004 12:00AM