Home / Environment / Tyre Chips Pave Roads, Solve Waste Woes
Tyre Chips Pave Roads, Solve Waste Woes
3 Sep
Summary
- Tyre chips insulate roads against frost and thaw.
- 20,000 tyres were buried in a Maine road trial.
- Waste tyres offer eco-friendly, cost-saving infrastructure.
In a 1995 engineering project, 20,000 discarded tyres were repurposed as Tyre-Derived Aggregate (TDA) to insulate roads in Maine, USA. This initiative aimed to solve persistent problems caused by deep winter frost penetration and spring thaws that destabilized gravel roads. The TDA, consisting of large tyre chips, creates a lightweight, permeable layer that significantly reduces frost damage and improves drainage.
This method addresses Maine's environmental challenge of managing over a million scrap tyres annually, many from illegal stockpiles. By transforming waste into valuable infrastructure material, engineers provide a second life for tyres, mitigating landfill burdens and pollution risks. Federal highway guidance now recognizes TDA's benefits for weak soils and cold climates.
Environmental studies confirm that TDA, when used appropriately above the water table, has a negligible impact on water quality. This reuse strategy not only offers a sustainable outlet for scrap tyres but also proved cost-effective, as demonstrated in a later EPA report showing $8.7 million in savings for a bridge rehabilitation project.
