Evaluation of an asphalt overlay for rubblized and cracked/seated Portland cement concrete.

摘要

Many Portland Cement Concrete (PCC) pavements in the United States are reaching the end of their design life. The Nevada Department of Transportation (NDOT) used the crack and seat and rubblization techniques with a hot mixed asphalt (HMA) overlay to rehabilitate these pavements. This project is located on I-80 in Nevada near Elko, Nevada, and was constructed in 1994.; This report defines the asphalt binder and mixture properties of the HMA overlay placed over the cracked and seated and rubblized PCC pavement. Properties determined were stability and resistance to moisture, permanent deformation, and low temperature cracking. A variety of aging techniques were used to condition the HMA to simulate the construction and environmental effects on the mixture. This initial research will be used to evaluate the long-term performance and cost effectiveness of a flexible overlay over cracked and seated and rubblized rigid pavements within Nevada.