January 24-28, 2021
Washington, D.C.
TRB 100th Annual Meeting
1778

Extraction and Characterization of Reclaimed Asphalt Binders Containing Polymers and Additives

Thursday, January 16, 2020, 8:00 AM-12:00 PM, Convention Center 2020
Hassan Tabatabaee, Cargill, Inc.; Raquel Moraes, National Center for Asphalt Technology (NCAT), presiding
Sponsored by Standing Committee on Asphalt Binders (Changed to Standing Committee on Binders for Flexible Pavement, AKM20, on 4/15/2020)

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.

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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