SPECIFIC GRAVITY OF AGGREGATES IN ASPHALTIC PAVING MIXTURES

WEIGHT-VOLUME RELATIONS ARE WIDELY USED AS CRITERIA FOR THE DESIGN OF BITUMINOUS PAVING MIXTURES. THE DETERMINATION OF SPECIFIC GRAVITY OF THE VARIOUS CONSTITUENTS OF THE PAVING MIXTURE IS THEREFORE A NECESSARY PART OF THE DESIGN PROCEDURE. HOWEVER, A UNIFORM PROCEDURE FOR DETERMINING SPECIFIC GRAVITY OF AGGREGATES FOR USE IN THE DESIGN OF BITUMINOUS PAVING MIXTURES HAS NOT BEEN ADOPTED. THIS REPORT COMPARES VALUES OF SPECIFIC GRAVITY OBTAINED BY SEVERAL PROCEDURES. THREE PROCEDURES WERE STUDIED WHICH YIELD THE SPECIFIC GRAVITY OF THE AGGREGATE DIRECTLY: BULK SPECIFIC GRAVITY, APPARENT SPECIFIC GRAVITY AND BULK IMPREGNATED SPECIFIC GRAVITY. TWO OTHER PROCEDURES WERE STUDIED WHICH MEASURE THE SPECIFIC GRAVITY OF THE BITUMINOUS MIXTURE DIRECTLY: AEROSOL AND VACUUM PROCEDURE AND AEROSOL AND PYCNOMETER PROCEDURE. THE BULK-IMPREGNATED SPECIFIC GRAVITY PROCEDURE AND THE AEROSOL AND VACUUM PROCEDURE WERE BOTH FOUND TO YIELD VALUES OF SPECIFIC GRAVITY CONSIDERED TO CLOSELY REPRESENT THE PROBABLE WEIGHT-VOLUME RELATIONSHIPS IN BITUMINOUS MIXTURES. THE AEROSOL AND VACUUM PROCEDURE REQUIRED LESS TIME THAN THE BULK, APPARENT, AND BULK- IMPREGNATED PROCEDURES.

• Record URL:
  https://onlinepubs.trb.org/Onlinepubs/hrbproceedings/34/34-024.pdf
• Supplemental Notes:
  • Vol 34, pp 320-328. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Benson, J F
  • Subbaraju, B
• Publication Date: 1955

Media Info

• Media Type: Digital/other
• Monograph Title: Proceedings of the Thirty-Fourth Annual Meeting of the Highway Research Board, Washington, D.C., January 11-14, 1955
• Serial:
  • Highway Research Board Proceedings
  • Volume: 34
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Aerosols; Aggregates; Bituminous mixtures; Design; Impregnation (Engineering); Present value; Specific gravity; Vacuum
• Uncontrolled Terms: Design criteria; Value
• Old TRIS Terms: Apparent specific gravity; Weight volume relationships
• Subject Areas: Design; Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00210984
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Apr 21 1994 12:00AM