Resilience of Flexible Pavements Following Flooding and Freeze-Thaw Events (2020-2021)

Resilience of Flexible Pavements
Following Flooding and Freeze-Thaw
Events (2020-2021)

The Client:
National Asphalt Pavement Association (NAPA)

Our Work:

Pavement performance can be greatly impacted by saturation of surface and foundation layers. Several field assessment studies have shown that the pavement structural capacity can be significantly reduced following flooding events (such as those caused by extreme storm surges) and freeze-thaw cycles. To assist the asphalt industry in providing (moisture) resilient pavement solutions, TEST conducted the following tasks:

  • Summarized different methods used by states and local transportation agencies on designing flexible pavements on subgrades that could become weak or compromised due to saturation from flooding, high ground water tables or freeze-thaw events.
  • Provided an overview of the mechanisms by which moisture affects flexible pavement performance and a summary of commonly adopted solutions used to minimize the risk of moisture damage to asphalt pavements.
  • Compiled five case studies where flexible pavements demonstrated resilience after flooding and/or freeze/thaw events.

The Outcome:
A technical report and brief summarizing the study tasks and a webinar presenting the findings of the study with emphasis on the case studies.