A NEW GRAPHICAL CHART FOR EVALUATING AGGREGATE GRADATION

LABORATORY TESTS WERE CONDUCTED TO TEST THE U.S. BUREAU OF PUBLIC ROADS AGGREGATE GRADATION CHART. THE GRADATION CHART WAS FOUND TO BE MORE CONVENIENT THAN THE LOGARITHMIC CHART BECAUSE MAXIMUM DENSITY GRADATIONS ARE REPRESENTED BY A STRAIGHT LINE FROM A THEORETICAL 0 PERCENT PASSING 0 SIEVE SIZE TO 100 PERCENT PASSING THE EFFECTIVE MAXIMUM SIZE. THE MAXIMUM DENSITY LINE ACTS AS A DESIGN TOOL TO COMPARE OTHER GRADATIONS OR TO ADJUST GRADATIONS TO PROVIDE DESIRED VOIDS AND STABILITY CHARACTERISTICS. FOR GRADATIONS OF THE SAME TYPE OF AGGREGATE WHICH PLOT SMOOTH CURVES ENTIRELY ABOVE OR BELOW THE MAXIMUM DENSITY LINE, THOSE CLOSEST TO THE LINE YIELD THE LOWEST VOIDS IN THE COMPACTED MIXTURE. THE DETRIMENTAL EFFECT OF GRADATION HUMPS TO THE MIX IS DETERMINED AND SKIP GRADATIONS ARE INVESTIGATED.

  • Supplemental Notes:
    • pp 13-26, 14 FIG, 4 TAB
  • Corporate Authors:

    Bureau of Public Roads /US

    Physical Research Division
    ,   USA 
  • Authors:
    • Goode, J F
    • Lufsey, L A
  • Publication Date: 1962-1

Subject/Index Terms

Filing Info

  • Accession Number: 00217546
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 5 1994 12:00AM