Overview
- Researchers from the University of Granada and University of Bologna cofinanced by China developed a pelletization process that binds shredded cigarette-butt fibers with Fischer–Tropsch wax for asphalt reinforcement.
- LabIC UGR tests demonstrate that asphalt mixtures incorporating up to 40% recycled pellets deliver superior crack resistance and increased ductility compared to conventional mixes.
- During asphalt production, pellet wax melts to release cellulose and PLA fibers that reinforce the matrix, improve binder retention, adjust bitumen viscosity and lower mixing temperatures.
- Preliminary findings show the approach can reduce energy consumption and pollutant emissions while repurposing billions of slow-degrading cigarette filters.
- Following laboratory validation, the team is preparing larger-scale road trials later this year to assess real-world performance and scalability.