Balanced Mix Design (BMD) helps ensure adequate rutting and cracking performance of asphalt mixtures, but as recycled asphalt material (RAM) contents increase, durability beyond cracking becomes increasingly important. TRB will host a webinar on Monday, November 24, 2025 from 12:00 PM to 1:30 PM Eastern that will help engineers unlock significant economic benefits by designing balanced, durable asphalt mixtures with high recycled material content. Presenters will showcase findings from NCHRP Report 1130: Capturing the Durability of High Recycled Binder Ratio Asphalt Mixtures, which revisits the forthcoming AASHTO PP 127 standard practice and expands its scope to include durability factors such as aging, moisture susceptibility, and raveling.
This webinar is sponsored by TRB’s National Cooperative Highway Research Program.
The registration fee is $100. Purchase a webinar package for discounted pricing. Complimentary registration is available for employees of TRB sponsors, standing technical committee chairs, involved CRP panel members, media, congressional staff, and TRB or National Academies staff. Visit MyTRB.org for details.
A recording will be sent to all registrants after the webinar.
 
Webinar agenda and presenters

• Results and AASHTO standard practice – Amy Epps Martin, Texas A&M University
• Motivation and experiment design – Nam Tran, National Center for Asphalt Technology at Auburn University
• Agency Perspective on AASHTO PP 127 – Stacey Diefenderfer, Virginia Department of Transportation
• Question and answer session moderated by Edith Arambula-Mercado, Texas A&M Transportation Institute

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:

• Understand the framework and approach outlined in forthcoming AASHTO PP 127 for designing and evaluating balanced and durable asphalt mixtures with high recycled binder ratios (RBR)
• Utilize the evaluation tools and thresholds in forthcoming AASHTO PP 127 to assess mitigation strategies and ensure balanced performance in high RBR asphalt mixtures

 
Professional Development Hours
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.
This webinar will be delivered as a scheduled – e-learning live event and is categorized within RCEP as Technical, Health and Safety.
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.
 
Pre-registration is required. Once the webinar starts, you will be unable to register. Individuals that are registered for a webinar but do not receive their confirmation emails due to their organization’s internal firewalls should contact TRB Helpdesk for assistance in signing in.
View our FAQ page for more information.
Registration questions? Contact TRB webinar program.