ABSTRACT
ABSTRACT: This paper presents the details of a study conducted to evaluate rutting and cracking potential of mixes consisting of Reclaimed Asphalt Pavements (RAP). Texas (Type B) and Indian (DBM-2) mix specifications were reviewed and a mix design that meets both specifications was selected for evaluation purpose. Hot mix asphalt specimens consisting of 0%, 15%, 25% and 35% RAP were prepared in the laboratory using PG64-22 asphalt as a virgin binder. Design binder content of mix was estimated by conducting Superpave volumetric mix design. Performance of mixes was evaluated using dynamic modulus test, Hamburg wheel tracking device, and Texas overlay test. In addition, binder tests such as multiple stress creep recovery, linear amplitude sweep test and Complex modulus were performed on virgin as well as reclaimed binders to identify the influence of virgin and reclaimed binders on mix performance. Laboratory test results suggest that addition of RAP enhances rutting resistance in comparison to conventional mixtures, while cracking/fatigue resistance deteriorated. The results indicated that fatigue/cracking potential should be the governing factor in the selection of optimal percentage of RAP.
