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The criticality of sieve size in asphaltic concrete mixes as measured by volumetric properties and stabilities.

File Language:
English


Details

  • Creators:
    Aderhold, J. Wayne
  • Corporate Creators:
    Virginia Highway Research Council
  • Subject/TRT Terms:
  • Publication/ Report Number:
    VHRC 70-R30
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Virginia
  • Edition:
    Final report.
  • Corporate Publisher:
    Virginia Transportation Research Council (VTRC)
  • Abstract:
    The purpose of this study was to investigate the effects of deviations from the specified aggregate gradation on the stability and volumetric properties of the S-5 mix. The project involved two phases of experimental work. The first phase consisted of designing a control mix to be used as a standard for comparison with the experimental mixes. The median S-5 specifications were used and an optimum asphalt content of 5.6% was determined through the Marshall design procedure. The second phase involved the molding and testing of specimens using aggregate gradations that varied systematically from the median S-5 gradation but had the same asphalt content as the control mix (5.6%). The results showed that the six sieve sizes in the S-5 gradation could be classified into three groups according to their effects on the stability and volumetric properties of the mix. The coarse sieves (3/8",#4 and #8) displayed similar curves, the #30 appeared to be a transition size, and the fine sieves (#50 and #200) showed characteristics which were generally opposite those of the coarse sieves. The #30 sieve was the most critical size with regard to stability. Another finding was that although the S-5 specifications do not place direct bounds on the volumetric properties of a mix, the gradation requirements seemed to provide fairly consistent control of them.
  • Format:
    PDF
  • Collection(s):
  • Main Document Checksum:
    urn:sha256:c48371854741632cca67da94a093a5118d67d4b99b4eab7ae437d6cf730a7ad9
  • Download URL:
  • File Type:
    Filetype[PDF - 1.42 MB ]
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