Study on Bitumen Modified with Crumb Rubber

The primary objective of this research is to develop a cost-effective and storage-stable crumb rubber modified bitumen (CRMB) using waste-derived materials, thereby offering an environmentally sustainable alternative for rubber waste disposal. The study focuses on improving the compatibility, dispersion, and long-term stability of crumb rubber within bitumen through novel chemical additives. Long-chain amine compounds were explored to enhance storage stability, while the synergistic interaction between polyamines and fatty acids was examined for improved modification efficiency. Additionally, a synthesized PET-based waste derivative combined with a bifunctional anchoring compound was investigated to promote chemical bonding within the CRMB matrix. The developed formulations aim to reduce phase separation, enhance performance characteristics, and provide a practical, eco-friendly solution for the bitumen industry. Overall, this work contributes to sustainable pavement technologies while minimizing the environmental impact of waste rubber and plastic materials.