The Town of Christiansburg began work in April 2019 on the reconstruction of John Lemley Lane and Howery Street. This project utilized Full Depth Reclamation, which is a rehabilitation method that involves recycling the existing asphalt pavement and its underlying layers into a new base layer. This technique greatly minimized the construction time and inconvenience for the neighborhood. Work was completed in Summer 2019.
When is Full Depth Reclamation used?
Full depth reclamation has been recommended for pavements with deep rutting, load-associated cracks, thermal cracks, and pavements with maintenance patches such as spray, skin, pothole, and deep hot mix. It is particularly recommended for pavements having a base or subgrade problem.
Why is Full Depth Reclamation used?
- Cost-effective
- Increases structural capacity
- Increases durability (compared to granular base materials)
- Shortens construction schedule and improves staging
- Provides an early opening to traffic
- Reduces impacts on the community during construction
- Reduces carbon footprint
How is FDR performed?
- A reclaiming machine is used to pulverize the existing asphalt pavement and base material.
- The asphalt is mixed with cement, water and other additives, resulting in a stronger road base.
- The new base is shaped and compacted to the surface.
- Once the base is completed, new layers of asphalt concrete are applied to complete the road.
The following video from Slurry Pavers, Inc. provides an overview of the process: