There is a need for realistic specifications for clay and gravel road surfacing on low-volume roads. TRB will host a webinar on Wednesday, December 9, 2020 from 2:00-3:30 PM Eastern that will identify specifications for clay content of gravel roads. The presenters will describe a mix design and test method for determining optimal amounts. They will also provide examples of ways low-volume road agencies have obtained better performing gravel roads.

This webinar was organized by the TRB Standing Committee on Low Volume Roads. You will be awarded a credit toward a free TRB webinar of your choosing when you sign up for this webinar.

Some registrants will need to pay $95 to attend this webinar. Sign into MyTRB.org to view registration information.

Webinar agenda and presenters

1. Requirements of testing: Steve Monlux, LVR Consultants, Inc.
   1. Quantity and quality assurance clauses
   2. Options for reducing crushing costs
   3. Typical mix design curves
2. Results from fifteen years of clay content optimization testing: Oscar Mena, United States Department of Agriculture
3. Question and answer session: Moderated by Brian Moore, Iowa County Engineers Association Service Bureau

The first 60 minutes of the webinar will be for presentations and the final 30 minutes will be reserved for audience questions.

Learning Objectives

At the end of this webinar, participants will be able to:

1. Identify rationales for selecting optimum clay content
2. Describe reasoning behind specification clauses
3. Discuss successful quality and quantity assurance methods

Professional Development Hour Information

Professional engineers (PEs) who register and attend the entire webinar as an individual will be awarded 1.5 Professional Development Hours (PDHs). TRB’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.

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

TRB 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.

Registration questions? Contact Reggie Gillum.