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Implementation of GPC characterization of asphalt binders at Louisiana materials laboratory : tech summary.

File Language:
English


Details

  • Creators:
    Daly, William H. ; Negulescu, Ioan
  • Corporate Creators:
    Louisiana Transportation Research Center
  • Subject/TRT Terms:
  • Publication/ Report Number:
    SIO No. 30000142 ; LTRC Project No. 10-6B
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Louisiana
  • Corporate Publisher:
    Louisiana Transportation Research Center
  • Abstract:
    Asphalt is a mixture of a wide variety of chemical compounds that include aliphatic hydrocarbons and highly fused ; aromatic ring systems. They are classifi ed as asphaltenes (medium molecular weight) and maltenes (low molecular ; weight). To improve the fi nal properties of an asphalt binder, a high molecular weight polymer is added. In the case of ; SBS (polystyrene-b-polybutadiene-b-polystyrene, a block copolymer) and SBR (polystyrene-polybutadiene rubber) ; polymer-modifi ed asphalt cements (PMACs), the polymer-modifi ed asphalt binder can be regarded as a true solution ; in which the polymer is homogeneously blended with the components of the base asphalt cement. Because there is a ; large diff erence between the molecular mass of polymer molecules and the mass of asphalt components (~ two orders of ; magnitude), the polymer can be easily visualized using a size exclusion analysis, such as gel permeation chromatography ; (GPC). As shown previously, the polymer and asphalt components of polymer-modifi ed asphalt cements can be ; separated completely using gel permeation chromatography. It is of interest to apply GPC methodology to routine ; characterization of asphalt binders and to employ the technique in forensic analysis of paving problems.
  • Format:
    PDF
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/26823/dot_26823_DS1.pdf
  • File Type:
    Filetype[PDF - 157.08 KB]
  • Collection(s):
    US Transportation Collection
  • Main Document Checksum:
    urn:sha256:a924efc7ad32a113f16dbfa4ee60228815583ccdf59368e378737390aef7e06f
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