Here’s how it works:
- FDR allows equipment to drive across a stretch of roadway and pulverize the existing asphalt and some of the gravel base material
- Cement is then sprayed on to the road. A stabilizing machine called a Reclaimer is driven along the road and mixes foamed asphalt, the sprayed cement as well as the pulverised asphalt and gravel road base together.
- The roadway is then shaped, graded and compacted to create a new strong, durable roadway base.
- Finally, the road is paved using asphalt, as seen in the opening photo.
Although FDR isn’t suited to all road rehabilitation projects, it is a program we’re hoping to integrate into more of our future construction work. Roads is always looking for new and innovative ways to reduce our environmental, fiscal and social impact in all of the work that we do. Find out more about the materials and research the Roads Construction group is working with on Calgary.ca.