The National Academies

NCHRP IDEA 20-30/IDEA 246 [Active (IDEA)]

Developing a Method for Selecting Low-Energy Mixing and Compaction Temperatures for Asphalt Mixtures Considering Asphalt Lubrication and Aggregate Characteristics
[ NCHRP 20-30 (NCHRP-IDEA) ]

  Project Data
Funds: $140,000
Staff Responsibility: Patrick Zelinski
Research Agency: The Board of Regents of the University of Wisconsin System
Principal Investigator: Runhua Zhang
Effective Date: 10/1/2023
Completion Date: 3/31/2025
Fiscal Year: 2022

This innovation applies tribological principles to develop a method for determining asphalt mixture mixing and compaction temperatures better than currently used methods. The method is based on asphalt binder lubricating properties and critical aggregate properties and involves developing a new tribological test to measure asphalt lubrication ability in the context of the simulated aggregate properties along with an innovative method to more appropriately determine mixture mixing and compaction temperatures with desired aggregate coating and mixture workability based on advanced statistical analysis methods. The results from this research are expected to significantly lower the asphalt mixture mixing temperature and compaction effort, reducing greenhouse gas emission, and saving energy. The results can also significantly improve the aggregates' packing, mixture density and binder film distribution and therefore, mixture mechanical performance.


Research will begin in October 2023.

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