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Effects of temperature segregation on the volumetric and mechanistic properties of asphalt mixtures : research project capsule.

File Language:
English


Details

  • Creators:
    Mohammad, Louay
  • Corporate Creators:
    Louisiana Transportation Research Center
  • Subject/TRT Terms:
  • Publication/ Report Number:
    14-1B
  • Resource Type:
    Brief
  • Geographical Coverage:
    Louisiana
  • Corporate Publisher:
    Louisiana Transportation Research Center
  • Abstract:
    Material segregation in asphalt mixtures is a non-uniform distribution of coarse ; and fine aggregates through its masses, i.e., concentration of coarse materials ; in some area and fine materials in others. During construction, the coarse and ; fine asphalt mixtures may cool at different rates, at different locations, causing ; temperature segregation (or temperature differentials). Excessive temperature ; differentials within a mat of uncompacted asphalt mixtures can cause variations ; in the density levels of the finished pavements due to the inconsistent ; compaction at different temperatures. A lack of density in the cooler areas of the ; pavement can cause premature deterioration of those pavement areas such as ; moisture damage, fatigue, cracking, rutting, raveling, pothole, etc. Therefore, it ; is essential to ascertain the effects of temperature segregation on the quality of ; asphalt mixtures as measured by their densification and mechanical properties ; of asphalt mixtures in Louisiana in order to improve the initial quality and the ; long term performance of its asphalt pavements. The pavement surface thermal ; profile during construction will be measured using a paver-mounted infrared (IR) ; bar known as PAVE-IR system commercially available from MOBA Corporation. ; This profile will be used to ascertain the effect of temperature segregation on ; the quality of asphalt mixtures as defined by measurements of density and ; mechanistic properties.
  • Format:
    PDF
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/28630/dot_28630_DS1.pdf
  • File Type:
    Filetype[PDF - 269.61 KB]
  • Collection(s):
    US Transportation Collection
  • Main Document Checksum:
    urn:sha256:d2a0f9d11e9ea6bf63fae52873cac4d57ebc7e244fa8c11cdaa9f5bf94919c2a
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