January 12-16, 2020
Washington, D.C.
Extraction and Characterization of Reclaimed Asphalt Binders Containing Polymers and Additives
Thursday, January 16, 2020, 8:00 AM-12:00 PM, Convention Center
Hassan Tabatabaee, Cargill, Inc.; Raquel Moraes, National Center for Asphalt Technology (NCAT), presiding
Sponsored by Standing Committee on Asphalt Binders
Characterizing binders reclaimed from recycled asphalt
materials (RAM) is complex because of the unknown composition of the original
asphalt, since modifiers (for example, polymers, acids, rubber, or recycling
agents) may be present. It is essential to understand the impact of the
extraction and recovery process on the resulting physical properties of the
reclaimed binder. Variables such as procedure, solvent, time, and temperature
can alter modifier integrity. Chemical and physical interactions in RAM may
influence the reclaimed binder properties. Thus, binder tests may not represent
field performance. The workshop reviews current and in-progress research to help
practitioners test and interpret reclaimed asphalt binder
properties.
Introduction and Motivation for This Workshop: Survey of U.S. State and Canadian Provincial Highway Agencies: Extraction and Recovery Process Variables
Hassan Tabatabaee, Cargill, Inc.; Raquel Moraes, National Center for Asphalt Technology (NCAT)
Effect of Solvents Used in Binder Extraction on Modified Asphalts' Properties
Hussain U. Bahia, University of Wisconsin, Madison
The Effect of Solvent Extraction Recovery on the Physical Properties of Asphalt Binders
R. Michael Anderson, Asphalt Institute
Comparison of Recovered Binder Results from Traditional Extraction Method Versus Automated One
Amir Golalipour, Engineering and Software Consultants, Inc.
Extraction and Characterization of Reclaimed Modified Asphalt Binders: Challenges and Opportunities
Jean-Pascal Planche, Western Research Institute; Michael Elwardany, Western Research Institute; Ryan Boysen, Western Research Institute
ASTM Standardization Process for Auto-Extraction of Neat and Modified Bitumen
Ann Baranov, Infratest USA, Inc