ACPA participated in the spring meeting of the National Concrete Consortium (NC2) last week. As usual, the annual event’s agenda included leading experts from the state transportation agencies and toll authorities, as well as industry professionals. The virtual meeting was held last week.

This year was no exception with Leif Wathne presenting on pavement resilience, which is increasingly gaining attention and interest with state and local agencies are tasked with reacting to flooding and other effects of increased intensity and frequency of storms.

Leif has spoken extensively on the topic of pavement resilience specifically related to inundation. In his NC2 presentation, he noted that stiffer pavements are less vulnerable to moisture related subgrade strength loss and therefore recover faster from an inundation (flooding) event. He also maintains that pavement resilience is fundamentally about good engineering.  As such, he said it’s important to recognize that the service environment of pavements is changing and that pavement structures must be designed to accommodate these changes, that often result in subgrades and subbases losing most of their strength.

He also advocates that agencies prioritize their needs by starting with the most critical pavement assets.

Dr. Mark Snyder, Pavement Engineering and Research Consultants, LLC, and a special consultant to ACPA, presented information on load transfer test results and provided a preview of proposed dowel specification changes.

He provided an overview of the existing AASHTO specs; discussed limitations and challenges to manufacturers and agencies; discussed the need for a revised specification and associated suite of structural and corrosion tests; and spoke about recent activities to revise existing specifications. He then shared results of structural testing of dowel systems.

ACPA plans to publish the information soon. Look for additional details in a future issue of ACPA TODAY.