BITUMINOUS MIX DENSITY BY COATED SPECIMEN

CORE WEIGHT COMBINED WITH THE SATURATED WEIGHT IN WATER RESULTS IN A VALUE APPROACHING TRUE SOLID DENSITY. CORE WEIGHT, SATURATED SURFACE DRY WEIGHT AND SATURATED WEIGHT IN WATER ARE USED TO DETERMINE APPARENT SPECIFIC GRAVITY. CORE WEIGHT AND SATURATED WEIGHT IN WATER CAN BE ADEQUATELY DETERMINED IN THE LABORATORY. THE SATURATED SURFACE DRY WEIGHT HAS A DEGREE OF VARIABILITY INHERENT TO THE MEASUREMENT. SAMPLES WITH LARGE VOIDS SATURATE EASILY BUT ALSO DRAIN QUICKLY PRIOR TO WEIGHING THUS GIVING HIGH DENSITIES. THOSE WITH SMALL VOIDS SATURATE SLOWLY BUT RETAIN WATER WELL AND MAY INDICATE A LOW DENSITY. A NEW METHOD OF TEST HAS BEEN DEVISED AS AN IMPROVEMENT ON THE OLD TEST METHOD USING A PARAFFIN SEAL ON THE CORES. MODERN BLISTER PACKAGING METHODS, WHICH ARE DESCRIBED AND ILLUSTRATED, ARE USED TO FIT A PLASTIC JACKET TO EACH CORE AND PREVENT WATER PENETRATION DURING WEIGHT IN WATER DETERMINATION. THE PLASTIC COATED PROCEDURE RESULTS IN THE MOST PREDICTABLE DENSITY. THE TIME REQUIRED IS NOT SIGNIFICANTLY GREATER THAN THE SATURATED METHOD AND THE COST OF PROCESSING IS NOMINAL. /FHWA/

  • Record URL:
  • Supplemental Notes:
    • REPORT NO: JHR 73-59
  • Corporate Authors:

    University of Connecticut, Storrs

    Department of Civil and Environmental Engineering, 261 Glenbrook Road
    Storrs, CT  United States  06269-2037
  • Authors:
    • Stephens, J E
  • Publication Date: 1973-1

Media Info

  • Pagination: 17 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00210486
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: Final Rept
  • Files: TRIS, USDOT
  • Created Date: Sep 17 1973 12:00AM