Performance of Interlocking Concrete Pavements in North America

Interlocking concrete pavements are increasingly being used in North America for roadway and urban infrastructure applications. However, limited information has been available regarding their long-term performance under North American traffic and environmental conditions. This study evaluates the performance of interlocking concrete pavements at three sites located in North Bay and Timmins, Ontario, Canada, and Fayetteville, North Carolina, USA. The investigation included field evaluations such as nondestructive deflection testing, visual distress surveys, and transverse profile measurements for rut depth analysis. Results indicated that interlocking concrete pavements exhibit structural behavior similar to flexible pavements and provide excellent long-term performance with minimal distress and low rut depths after 6–8 years of service. The study also confirmed that traffic loading significantly influences the stiffness of the paver-sand composite layer due to progressive interlocking action.