Description
In this study, a laboratory experimental program was conducted to obtain material properties and performance characteristics for a “Reference Gap” and “Asphalt Rubber (AR) Gap” graded mixtures that were used on the Swedish Malmo E-06 Highway. The advanced material characterization tests included: Dynamic (Complex) Modulus for stiffness evaluation, repeated load for permanent deformation characterization, beam fatigue for crack evaluation, and C* Integral test to evaluate crack propagation. The data was used to compare the performance of the AR Gap Graded mixture to the Reference Gap. The results showed that the AR gap graded mix would provide better resistance to low temperature cracking and permanent deformation. The expected fatigue life for the AR gap graded mixture was higher than the reference mix for the existing highway conditions. Furthermore, the crack propagation tests showed that the AR gap graded mixture has higher resistance to crack propagation.
