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Conference on Stone-Matrix Asphalt



Thank you to everyone who attended and participated in the conference. Some 250 people from 20 countries and 32 U.S. states came to Atlanta to share experiences with and learn more about the performance, economic, and sustainability benefits of SMA, as well as to hear about research pushing the material in new and innovative directions. TRB is expected to release an e-circular of conference papers and presentations. As these become available, we will post them to the NAPA website.


Click here to download the conference wrap-up report.


On November 5–7, 2018, the National Asphalt Pavement Association, the Asphalt Institute, and the Transportation Research Board of the National Academies with support from the Federal Highway Administration hosted the 1st International Conference on Stone Matrix Asphalt (SMA) in Atlanta, Georgia. SMA, also called stone mastic asphalt, was developed in Germany in the 1960s to provide heavily trafficked roads with a durable, rut-resistant wearing course using a gap-graded aggregate structure and a modified asphalt binder at elevated asphalt contents. SMA has been used worldwide for almost 50 years, and it has been used in the United States for the past 25 years, but only a handful of states have implemented it widely. Since its introduction to the U.S., SMA technology has evolved which may make it beneficial in broader applications. This conference will capture advancements made in SMA mixtures and pavements over the past 25 years.


Conference Dates: Nov. 5–7, 2018

Conference Location: Westin Peachtree Plaza Hotel, Atlanta, Georgia


Conference Co-Sponsors:

SMA-NAPA-Logo Gradient   SMA-TRBlogo   SMA-aapt-logo123   SMA-RPA logo V0   SMA-USTMA   logoAsphaltInstitute horizontal