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Free Thinlay Webinar Registration Now Open

Two Decades of Positive Thinlay Performance at the NCAT Pavement Test Track

Speaker: Dr. R. Buzz Powell, P.E., Associate Director & Research Professor, National Center for Asphalt Technology

Date: January 21, 2021 3:00 - 4:00 PM Eastern Time (US and Canada)

Description: The NCAT Pavement Test Track has been used by state DOTs to execute innovative, relevant, and implementable research for over 20 years. Thinlays have played an important part in the Track research program since the 2003 (2nd 3-year) research cycle. The role of thinlays was expanded in 2012 in support of off-Track pavement preservation research. Since that time, thinlays have been placed on the Track, on off-Track southern (low and high traffic) pavement preservation sections, and on northern (low and high traffic) pavement preservation sections in support of the NCAT+MnROAD Pavement Research Partnership. Properly designed and well built thinlays have proven themselves to be both rut and crack resistant, and have provided a riding surface with a safe level of surface friction. The positive history with thinlays at the NCAT Pavement Test Track and within the NCAT+MnROAD Pavement Research Partnership is reviewed in this presentation.


1. Thinlays are more versatile than many people believe
2. Thinlays can be both crack and rut resistant
3. Balanced mix design (BMD) practices can be used to ensure good thinlay performance.

Professional engineers (PEs) who register and attend the entire webinar as an individual will be awarded 1.5 Professional Development Hours (PDHs). APA/NAPA’s webinar program awards PDH credits only to the registered individual, and not to other members of a group that view the webinar together. To be eligible for the credits, individuals must remain signed in for the entire webinar, including for any question and answer session following the presentations.

APA/NAPA will report credits earned to the Registered Continuing Education Program (RCEP). Complaints about registered providers may be sent to RCEP, 1015 15th Street, NW, 8th Floor, Washington, D.C., 20005.