EXPERIMENTAL INVESTIGATIONS ON THE PERFORMANCE OF BITUMINOUS MIXES WITH RECLAIMED ASPHALT PAVEMENT (RAP) MATERIALS (CASE STUDY TUMKUR TO CHITRADURGA-NH4)

Abstract

Recycling asphalt means adding the reclaimed asphalt to new asphalt mixes, with the aggregates and the old bitumen performing the same function as in their original application. Re-use asphalt means the utilization of reclaimed asphalt as foundation, fill or base course material, with the recovered aggregate and bitumen performing a lesser function than in the original application. Recycling of hot mix asphalt (HMA) material results in a reusable mixture of aggregate and asphalt binder known as Reclaimed Asphalt Pavement (RAP). Recycling of asphalt pavements is a valuable approach for technical, economical, and environmental reasons. Using RAP has been favored over virgin materials in the light of the increasing cost of asphalt, the scarcity of quality aggregates, and the pressuring need to preserve the environment. The present laboratory investigation carried out on Bituminous Concrete (BC) mixes prepared with 10 %, 20 %, 30 % and 40 % RAP material obtained by scarifying existing distressed asphalt pavement, Surface new aggregate and bitumen such as VG-30 without using any rejuvenator. In this investigation RAP to new aggregate ratio has been adopted as 10:90, 20:80, 30:70and 40:60.Various laboratory tests such as Marshall mix design, static indirect tensile test, repeated load indirect tensile fatigue tests were carried out on RAP mix and the results were found. From the laboratory results it is observed that RAP mixes shows good Marshall Stability, Indirect tensile strength, and fatigue life similar to conventional asphalt mix.