In 2001, the Ministry of Transportation Ontario (MTO) constructed its first full depth reclamation with expanded asphalt stabilization project on the Trans Canada Highway, between Sault Sainte Marie and Wawa, in Northern Ontario. The project incorporated three different expanded asphalt mix designs and a control section of full depth reclamation with hot mix overlay. The project has been monitored annually over the past 10 years using the Ministry’s Automated Road Analyser (ARAN), which measures International Roughness Index (IRI) and rutting. Roughness data indicates a significant difference between the expanded asphalt stabilized base test sections and the control section. The expanded asphalt stabilization has delivered superior performance over the conventional full depth reclamation with hot mix overlay. Performance curves for the different treatments are compared to the ministry’s average performance curve for full depth reclamation projects, and to the performance of treatments on adjacent projects. This project demonstrates the exceptional performance of the expanded asphalt mixes, with 10 years of proven superior pavement condition and ride.
