TRB Webinar: Practices for Stabilized and Recycled Base and Subgrade Materials

Road construction professionals were invited to a TRB webinar on Monday, October 7, 2019, from 2:00 PM to 4:00 PM ET. The webinar provided an overview of practices used to achieve high quality subgrade and base material when using lower quality or recycled materials. Professionals used laboratory and field data to predict field performance of high-quality bases and subgrades. These same processes are used now to evaluate how low-quality and recycled materials can create high-quality bases and subgrades. The webinar addressed construction efficiency gains for existing lane reconstruction using FDR and CCPR, NDT testing and lab design, relating lab data to field data, and utilizing the PM device to compact and test a range of materials. Presenters also discussed financial savings and improved performance through reclamation technologies. 

This webinar was organized by the TRB Standing Committees on Stabilization of Geomaterials and Recycled Materials and Geotechnical Instrumentation and Modeling.  

The slides are available. Contact TRB webinar for a copy of the recorded webinar.

Webinar Presenters

• Brian Diefenderfer, Virginia Department of Transportation
  
• Tom Scullion, Texas A&M Transportation Institute 
  
• Soheil Nazarian, University of Texas at El Paso
  
• Isaac Howard, Mississippi State University

Moderated by: Robert Parsons, University of Kansas

Professional Development Hour Information

A certificate for 2 Professional Development Hours (PDHs) will be provided to Professional Engineers (PEs) who register and attend the webinar as an individual. For approved webinars, TRB’s webinar program awards Registered Continuing Education Provider (RCEP) Professional Development Hour (PDH) credits associated with participation only to the registered individual and not to other members of a group that view the webinar together. To receive PDH credits, please register as an individual and sign into the webinar from your personal computer. After doing this, you may join your group in a meeting room.  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.

Individuals registered as Florida PEs are no longer required to email TRB with your license number to report your attendance. Instead, please use your certificate that TRB provides through RCEP.net as verification of your attendance to the Florida Board of Professional Engineers.

Please check with your licensing board to ensure that TRB webinar PDHs are approved by your board.

This webinar was developed in March 2019. TRB has met the standards and requirements of the Registered Continuing Education Program (RCEP). Credit earned on completion of this program will be reported to RCEP by TRB. Complaints about registered providers may be sent to RCEP, 1015 15th Street, NW, 8th Floor, Washington, DC 20005. Website: www.RCEP.net.