Les exposés écrits du congrès ont été publiés dans la langue dans laquelle ils ont été soumis à l’ATC.
The consequences of climate change have begun to manifest globally, with noticeable impacts in Canada. An increase in frequency and severity of extreme weather events, such as floods, wildfires, and heat waves, has been prominent in the recent Canadian landscape. Canadian infrastructure may be compromised under these extreme weather events, if not properly designed and constructed. Flexible pavements may be particularly sensitive to extreme heat waves due to the viscoelastic properties of the asphalt binder. Previous work has examined the impact of heat waves on pavements in Southern and Southeastern Ontario to identify the critical conditions predicted to cause the greatest increase in rutting. Pavement performance under various heat wave scenarios has been predicted using Pavement Mechanistic Empirical Design (PMED) software for a typical Ontario highway cross-section. This study seeks to expand on the previous work by also considering Northern Ontario conditions, thus better representing all of Ontario’s binder grade zones. Furthermore, the analysis has been repeated with an increased asphalt binder grade to assess the potential for better rutting resilience. The study identified that heat wave return-period was of greater risk to pavement performance than heat wave intensity. Furthermore, it was identified that increasing the asphalt binder grade and increasing the asphalt binder lift thickness were potential methods for increasing rutting resiliency.