Home / Science / Florida Tests Ash Roads: Groundwater Safe After Decade
Florida Tests Ash Roads: Groundwater Safe After Decade
5 Oct
Summary
- Florida researchers tested ash from waste burning beneath a working road.
- Groundwater was monitored for ten years, showing no adverse effects.
- Ash can be safely used in road construction when sealed within structures.
In Florida, a decade-long pilot project from 2014 to 2024 examined the safety of using municipal solid waste incinerator bottom ash in road construction. Researchers built a full-scale test roadway incorporating the ash into the base layer, asphalt, and concrete. Groundwater was continuously monitored from wells.
The study found no evidence that the ash negatively affected the groundwater during the ten-year period. This suggests that when ash is properly sealed within the road structure, it can be a viable construction material.
Earlier laboratory tests had identified potential leaching of aluminum, molybdenum, and antimony. However, computer modeling and the real-world field data from this project indicated that groundwater remained below regulatory thresholds.
This case study provides valuable real-world data, bridging the gap between laboratory predictions and actual road performance. It offers crucial insights for future projects considering the reuse of incinerator ash in infrastructure development.
