The construction of a new pavement or overlay of an existing pavement requires huge amount of good quality aggregates and binder resulting high cost of construction. Whereas large quantity of reclaimed asphalt pavement materials (RAPM) are collected and stockpiled during the highway maintenance and milling process. In the same direction research is also going in order to re-utilize this waste materials and recycle it to use them in highway constructions. For a developing country like India, Reclaimed asphalt pavement materials (RAPM) can be beneficial as the increasing cost of bitumen and scarcity of quality aggregates is also an issue for new pavement construction, so recycling of existing flexible pavement results in considerable savings of material, money and energy. By cold milling of the existing flexible pavement, one can retain the final levels of an existing pavement thus saving cost of replacement of kerbs, drains, crash barriers in highways.

The present study is focused on review of the effect of partial and full replacement of RAP in comparison to virgin mixes in flexible pavement and also cold in-situ recycling using 100% RAP with foamed bitumen technology. Using RAP, improved ITS, TSR, Mr, results have shown that by increasing the percentage of RAP, stiffness of the asphalt matrix can be improved by showing improved rutting resistance at high temperature. The review of results on various literature by using the reclaimed asphalt pavement (RAP) in flexible pavement are very encouraging and is required to be used for it’s technical, economic and environmental

reasons.