Asphalt rubber asphalts concrete friction course overlay as a pavement preservation strategy

The use of Asphalt Rubber (AR) pavements in the USA has been successful by several States. AR binder used in the hot mix asphalt is a mixture of 80 percent hot asphalt and 20 percent ground waste tire crumb rubber. Typically, AR-Asphalt Concrete Friction Course (AR-ACFC) mixes contain 9 to 10 percent asphalt rubber binder and their use has been primarily focused on reducing thermal and reflective cracking, and highway noise. This paper discusses the AR-ACFC benefits as a pavement preservation strategy. It highlights some results of the laboratory material characterization tests, and presents several field performance evaluation outcomes including: highway noise reduction, mitigation of daily thermal variances in Portland Cement Concrete pavements, improved skid resistance, reduced roughness, and reduction of emission rates of tire wear per kilometer driven