Recycled Asphalt Shingles (RAS)
![This is a trommel, a rotating cylinder with small openings, that is sorting the properly sized recycled asphalt shingles onto a conveyor which is making a small stockpile. The oversized recycled asphalt shingles are diverted back to the crusher.](images/ras.jpg)
- Tech Brief: Practices and Lessons Learned When Using Reclaimed Asphalt Shingles in Asphalt Mixtures, FHWA-HIF-22-001, 2021
- Field Review: Successful Practices and Lessons Learned When Using Reclaimed Asphalt Shingles in Asphalt Mixtures, Cooperative Agreement Materials
- FHWA Division Office Survey on State Highway Agency Usage of Reclaimed Asphalt Shingles: Quantities, Trends, Requirements, and Direction - Results from May 2017, FHWA-HIF-18-009, 2018