Webinar: Natural Pozzolans in the Pacific Northwest and their Beneficial Uses

Webinar 2020 - May 19 Matthew Sleep.png
Tuesday, May 19, 2020, 10:00am to 11:00am PDT
Matthew Sleep, Oregon Institute of Technology
PDH: 1 | AICP: 1



The eruption of Mt. Mazama approximately 7,700 years ago created what is now known as Crater Lake. This eruption blanketed the Pacific Northwest with volcanic ash. This volcanic ash has been collected from several locations in Southern Oregon near the Oregon Institute of Technology campus. This volcanic ash has been tested and shown to have properties beneficial of a natural pozzolan. This seminar will present the results of a significant laboratory program to determine the natural pozzolanic capabilities of Mt. Mazama volcanic ash. In addition, information will be presented on a field application using the material to create ADA accessible trail surfaces.


  • Attendees will learn the location and natural pozzolanic properties of Mt. Mazama volcanic ash.
  • Attendees will learn trail surface requirements for ADA accessibility.
  • Attendees will be given information on how to use Mt. Mazama volcanic ash for trail stabilization.


This webinar is based on a study funded by the National Institute for Transportation and Communities (NITC) and conducted at the University of Utah. Read more about the NITC research: ADA Accessible Trail Improvement with Naturally Occurring, Sustainable Materials.


Matthew Sleep, Oregon Institute of Technology

Matthew Sleep is an Associate Professor of Civil Engineering at Oregon Institute of Technology. Dr. Sleep teaches courses in civil engineering materials, geotechnical engineering, and geology. Dr. Sleep's research includes the use of natural pozzolans, risk and reliability, and engineering education.


This 60-minute webinar is eligible for 1 hour of professional development credit for AICP (see our provider summary). We provide an electronic attendance certificate for other types of certification maintenance.


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This webinar is hosted by the Transportation Research and Education Center (TREC) at Portland State University. The research was funded by the National Institute for Transportation and Communities (NITC), a program of TREC and one of five U.S. Department of Transportation national university transportation centers. The NITC program is a Portland State-led partnership with the University of Oregon, Oregon Institute of Technology, University of Utah and new partners University of Arizona and University of Texas at Arlington. We pursue our theme — improving mobility of people and goods to build strong communities — through research, education and technology transfer.