A comparative analysis of modified binders : original asphalts and materials extracted from existing pavements.

PDFTech ReportLTRC Report 462State Project No. 736-99-1498LTRC Project No. 04-3BBindersGel permeation chromatographyPolymersPolymer asphaltAsphalt cementAsphalt pavementsCrumb rubberLouisianaLouisiana Transportation Research CenterDaly, WilliamLouisiana Transportation Research CenterUS Transportation CollectionThe initial objective of this research was to develop procedures and standards for applying GPC as an analytical tool to define the percentage amounts of polymer modifiers in polymer modified asphalt cements soluble in eluting GPC solvents. Quantification of GPC solvent insoluble CRM present in binders by a repeated solvent/non-solvent precipitation procedure was developed. The second objective was the assessment of the extent of field aging of modified asphalt binders by using both GPC and rheological analyses