ABSTRACT
In 2003, the first trial of Cold In-Place Recycled Expanded Asphalt Mix (CIREAM) was constructed adjacent to a Cold In-Place Recycling (CIR) mix on Highway 7, east of Perth, Ontario. The major difference between the two processes is that CIR uses emulsion and CIREAM uses foamed asphalt as binding agent. From this successful trial, CIR and CIREAM have become established cold recycling pavement treatments used by Ministry of Transportation Ontario (MTO).
After 20 years in service, this section of highway has reached its end of lifecycle. Continuous performance monitoring of these two sections have been performed over the years. Laboratory testing was carried out to determine the resilient modulus and indirect tensile strength (ITS) of the mixes. Falling Weight Deflectometer (FWD) testing was carried out to monitor the performance, and Ultrasonic Pulse Velocity (UPV) testing was completed to assess the overall quality of the mixes. In addition, typical pavement condition performance monitoring was done using the Ministry’s Automated Road Analyzer (ARAN).
This paper summarizes the pavement performance conditions and the results over the years and provides documentation of the end of lifecycle of the two sections. The results confirmed both CIR and CIREAM are performing similarly after 20 years of service.
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