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

File Language:
English


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  • Creators:
  • Corporate Creators:
    Louisiana Transportation Research Center
  • Subject/TRT Terms:
  • Publication/ Report Number:
  • 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.

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    PDF
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  • Main Document Checksum:
    urn:sha256:a924efc7ad32a113f16dbfa4ee60228815583ccdf59368e378737390aef7e06f
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    Filetype[PDF - 157.08 KB ]
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