Estimation of Low Temperature Properties of RAP Binder Without Extraction

In recent years, the use of reclaimed asphalt pavement (RAP) as a component of asphalt mixtures has become a common practice. For many years, researchers and Department of Transportation (DOT) officials have questioned the adverse effects, if any, of using solvents to extract and recover the binder. Therefore, researchers have been investigating new methods, without extraction techniques, of estimating the RAP binder properties, especially with respect to the low-temperature characteristics of binders and the mixtures. The major goal of this research project was to determine if the low-temperature properties of the aged asphalt binder in RAP could be obtained by using the fines (-#50 to +#100) generated from sieved RAP materials rather than from the binder extracted from the RAP. In addition, the low-temperature characteristics of several mixtures containing RAP were studied and evaluated for any correlation with the binder properties. Several samples were made with different RAP sources, different percentages of RAP content, various low temperatures (i.e., 0, -6, -12, and -18 °C), and at many states (i.e., virgin, Rolling Thin Film Oven (RTFO), and Pressure Aging Vessel (PAV)). In addition, some of the RAP sources were obtained after one year and bending beam rheometer (BBR) testing was conducted. Other testing procedures and specifications such as indirect tensile strength and semicircle bending (SCB) were used and evaluated.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 411p

Subject/Index Terms

Filing Info

  • Accession Number: 01610858
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-SC-16-01, TCTC 16-01
  • Contract Numbers: SPR 709
  • Files: TRIS, ATRI, USDOT, STATEDOT
  • Created Date: Aug 26 2016 10:00AM