JMS_V4_N2_RP4 Siksha Swaroopa Kar Pramod Kumar Jain G. Sekaran Journal on Material Science 2347–615X 4 2 24 29 RTFOT, PAV, FTIR, CSM Bitumen is a visco-elastic material, and primary requirement for flexible pavement construction. Elementally, bitumen is around 95% carbon and hydrogen, containing about 85% of hydrogen and 8% of carbon, and up to 5% sulfur, 1% nitrogen, 1% oxygen and 2000 ppm metals. It is composed mainly of highly condensed polycyclic aromatic hydrocarbons. Fourier Transform Infrared (FTIR) microscope is used for studying the hydrocarbon composition of bitumen. With the addition of different modifiers, the required properties of bitumen for road construction is improved. In this study, waste generated from leather industry is converted into non hazardous form which is used as a modifier to the bitumen. FTIR measurements were conducted for obtaining the microstructure distribution of neat and modified bitumen. Meanwhile, the short-term and long-term aging processes of bitumens are simulated by Rolling Thin Film Oven (RTFO) and Pressure Aging Vessel (PAV) tests. Sulfoxide and carbonyl index were calculated for the aged and neat binders and it has been observed that, the rate of oxidation is faster in neat bitumen compared to modified binder. July – September 2016 Copyright © 2016 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=8127