Paving-Grade Asphalt Binders
Amma Wakefield, MASc, PEng Canadian Regional Engineer Asphalt Institute
Paving-grade asphalt binders are specified based on their properties in an original state following a specification such as the Performance Graded (PG) Asphalt Binder Specification. However, there has always been an interest in determining the properties of asphalt binder of in-place asphalt mixtures for research or forensic investigation purposes. With the increased use of reclaimed asphalt pavement (RAP), many user agencies are also looking for ways to evaluate the properties of the blended asphalt binder (i.e., new binder and old binder from RAP) since this also has an impact on the asphalt pavement performance.
One option is to conduct mixture performance testing. Another option is to conduct solvent extraction recovery testing on the asphalt mixture and determine the physical properties of the recovered asphalt binder.
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NBM&CW October 2022
