The National Asphalt Pavement Association (NAPA) released "Thinlays For Pavement Preservation," which discusses the use of a suite of thin asphalt pavement mixtures designed for successful pavement preservation. Thinlays correct minor distresses that improve the performance and life of a road.

The download (PDF) is $25 for non-members and free to NAPA members as well as approved non-profit associations, government agencies, and some educational institutions.

The guide is written by Michael A. Heitzman, Ph.D., PE and E. Ray Brown, Ph.D., PE from the National Center for Asphalt Technology at Auburn University and John Hickey, PE, Esq. at the Asphalt Pavement Association of Oregon. It covers:

  • How overlays fit within pavement management systems;
  • When and how overlays should be used based on existing pavement condition;
  • How Thinlay mixes should be developed and specified;
  • Best practices for Thinlay construction;
  • Cost and performance comparison of common pavement preservation techniques;
  • Case studies highlighting the successful use of Thinlays under a variety of conditions.

“Pavement managers are looking to get the best possible value and performance for their roadway network within their budgets,” says NAPA Vice President for Engineering, Research, and Technology Audrey Copeland, Ph.D., PE. “When used appropriately, Thinlays meet those needs with lower life-cycle costs by improving ride quality and armoring the pavement surface against damage from loading and the elements.”

Download the publication here.

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