Traffic growth in developing nations like India reduces flexible pavement service life. Due to their structural capabilities, various modified binders garnered attention in recent years. Modified binders emit more hazardous gases and need higher manufacturing temperatures. Researchers developed many additives to lessen modified bitumen's issues and keep flexible pavements from deteriorating. This paper critically reviews geopolymers and crumb rubber (CR) modified binders and their use in pavement. Thus, CR binders with and without geopolymers must be understood structurally and physically. The article analyses how geopolymers affect CR bitumen's conventional characteristics. In this study, the physical behaviour of the Crumb Rubber Modified Binder (CRMB–55) and crumb rubber with Geopolymers (at 6, 8, and 10%) is investigated through a series of experiments conducted on both unaged and aged binders. Experiments such as softening point, penetration test, and elastic recovery were carried out in order to determine the binders’ respective physical attributes. The results of the tests demonstrated that there had been an influence on the physical properties of CRMB due to an increase in the geopolymer content. The penetration value was observed to decrease until 8% modification indicating a stiffening of the binder and an increase in penetration value was observed at 10% implying the softening of the binder. These results corroborated with the softening point values as 8% showed the highest softening point when compared to the other binders. Furthermore, the elastic recovery test conducted at 15 ℃ on the samples concluded that 8% modification has better recovery property than the other binders displaying an elastic recovery value of 78%.