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The National Academies

NCHRP 20-07/Task 412 [Active]

Adjustments to the Superpave Volumetric Mixture Design Procedure for Selecting Optimum Asphalt Content
[ NCHRP 20-07 (Research for AASHTO Standing Committee on Highways) ]

  Project Data
Funds: $100,000
Staff Responsibility: Edward Harrigan
Research Agency: National Center for Asphalt Technology
Principal Investigator: Nam Tran
Effective Date: 2/1/2018
Completion Date: 5/31/2019

OBJECTIVES
 
The objectives of this research are to (1) summarize and evaluate successful approaches currently being used by SHAs to adjust the Superpave volumetric mixture design to obtain higher asphalt binder contents; (2) verify the increase in optimum asphalt content through a limited laboratory experiment that compares successful approaches with the current AASHTO standards; and (3) document these results as proposed appendixes or amendments to AASHTO R 35, AASHTO M 323, or both.

STATUS


Research is in progress.

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