Chemical changes due to oxidative aging were evaluated for eight unmodified asphalt binder materials from the Federal Highway Administration (FHWA) Turner-Fairbank Research Center.  A reference binder material, a rolling thin film oxidation (RTFO) reference material, and RTFO / pressure aging vessel (RTFO PAV) material properties were compared with binder extracts from slices taken from representative 6-inch core samples from the FHWA Accelerated Load Facility (ALF) site.  The analytical methods utilized include Fourier transform infrared (FTIR) spectroscopy, differential scanning calorimetry (DSC), the WRI Asphaltene Determinator separation, and elemental analysis. In addition, select materials were analyzed by ultrahigh resolution electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI FT-ICR MS) at the National High Magnetic Field Laboratory (NHMFL) at Florida State University.

Oxidative aging and chemical changes in an asphalt binder

244th National Meeting (2012)

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