In flexible pavements, fresh bitumen works as a binder. It is inefficient and has several drawbacks when used on the road. As a result, modifiers are employed to improve the qualities of asphalt. Thermoplastic elastomers and plastomers are two of the most often utilized bitumen modifiers nowadays. These modifiers are not widely accessible and are rather expensive. As a result, waste items are now favoured for bitumen modification. Tetra Pak was utilized in this study to improve the qualities of bitumen, which is a waste material that includes 5% aluminium, 25% LDPE (low-density polyethylene) and 75% paper and is used globally for packaging of liquid food like fruit juices and milk. Tetra Pak is a paper-plastic-based material. In this study, varying percentages (0.5%, 0.8%, 1.0% and 1.5%) of Tetra Pak were blended with bitumen. Following that, the physical characteristics of neat and modified bitumen, as well as mixtures made with this bitumen, were assessed and compared. When Tetra Pak modified bitumen was compared to neat bitumen, it was discovered that bitumen containing Tetra Pak produces considerable changes in physical properties. It was discovered that mixes containing 1% Tetra Pak results in higher Marshall stability values and lower optimum binder content and thus produce superior outcomes compared to other mixtures.