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Evaluation of Plus Grades of Performance Grade (PC) Asphalt Binder

Started: January, 2014 Ended: June, 2014 Project ID #4W4804 Status: Completed


The objective of this project is to evaluate best practices for the use of Plus Grades of Performance Graded (PG) Asphalt Binders and the effect of these binders on long-term performance.


WTI researched information and guidance for a comprehensive report to summarize the current knowledge and best practices to determine correlations between Performance Grade Plus asphalt binders and the long-term performance of pavement properties, such as creep compliance, ductility, and viscoelastic properties.  The study evaluated modified binders to determine if there is any benefit to requiring their use in HMA/WMA mixes and to develop a specification draft for their use.  The approach consisted of 1) a literature review to study and identify state Departments of Transportation that have been active in developing specifications for using modified asphalt binders, and 2) an in-depth investigation to correlate lab tests and properties with long-term performance of polymer modified binders.


Sponsors & Partners

  • New Mexico Department of Transportation (NMDOT) Sponsor

Part of: Infrastructure Maintenance and Materials

Project Tagged In: Asphalt, cement binders

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