Experimental Study on Aging of Different Grades of Bitumen for Bituminous Mixes Concrete

India consists of a vast network of highways and roads, and the whole span of those roads is more than 3.31 million kilometers. About 98% of the roads in India are flexible, so bitumen, used as a binder, is a key part of how well bituminous mixes work. The asphalt pavements are breaking down not only because of more traffic but also because of the extreme weather in the country. One of the primary causes of asphalt pavement damage is bitumen aging. The RTFOT rotates the bitumen thinner film, while the modified TFOT checks it for microfilm thickness. This research examines the usage of VG30, PMB40, CRMB55, and aggregate in the production of a bituminous concrete layer. The physical parameters of regular and aged bitumen were evaluated in the proposed research. After evaluating the quality, it was discovered that the aged bitumen outperformed the standard bitumen. This study evaluated the Marshall characteristics of various grades of conventional bitumen and RTFOT-modified bitumen. According to the study, all of the raw materials’ physical parameters are in accordance with the MoRTH (Specifications for road and bridge works. Indian Road Congress New Delhi, India, 2013 [1]) criteria. We constructed the natural BC mix in the proposed research by employing aggregate and different grades of bitumen and performing Marshall testing. Again, the entire procedure was carried out with the old bitumen. Following laboratory experiments on various grades of bitumen and aged bitumen, it has been discovered that aged bitumen has greater strength than regular bitumen and has a lower Marshall flow value.