Modification of dynamic modulus predictive models for asphalt mixtures containing recycled asphalt shingles

ecycled asphalt shingles (RAS) have been used in road pavement construction for a number of years primarily on low volume roads. The use of RAS represents economic and environmental opportunities as it provides as good or better performance when processed and proportioned appropriately than commonly used asphalt mixtures. The primary components of RAS are asphalt, mineral filler, mineral granules, and felt. The effect of RAS fibers on an asphalt mixture's dynamic modulus, which is a key input in the Mechanistic-Empirical Pavement Design Guide (MEPDG) and one of the critical properties of asphalt mixtures affecting flexible pavement responses that are related to its performance, are still uncertain.;The National Pooled Fund Study...