Evaluating Unbonded Concrete Overlay for Usage on Ontario Residential Streets

Abstract

Composite pavements have become increasingly common in North America, these pavements usually result from the rehabilitation of Portland cement concrete (PCC) pavements. When a PCC pavement reaches close to the end of its service life, a layer of Hot-Mix Asphalt (HMA) is placed to increase service life. However, with time, increasing traffic loads and other environmental factors, the composite pavements are experiencing heavy distresses. This research focused on developing a solution that would allow long-term pavement performance; concrete overlays have been deemed successful in many parts of North America, mainly on highways. This study looks at the design, construction, testing and monitoring of a concrete overlay on a residential road, the first of its kind in Ontario, Canada.