Full depth reclamation, or full depth recycling (FDR), is a process that rebuilds worn out asphalt pavements by recycling the existing material.
Old asphalt and base materials are pulverized using a specialized machine called a reclaimer. On top of the pulverized material, water is added to reach the optimal moisture content for compaction and then a variety of materials, such as dry cement, lime, and fly ash are incorporated for stabilization. A reclaimer is used again to mix all the materials. After shaping and grading, the new base is compacted to produce a strong, durable base for the asphalt.
Since this method recycles the materials in place, there is no need to haul in aggregate or haul out old material for disposal.
Full depth reclamation with cement saves money while preserving natural resources by using existing materials and conserving virgin aggregates. The pavement performance is improved through better stabilization, building a stronger, low-maintenance pavement that will last for many years.
With proper engineering and testing protocols the FDR process provides a design life-cycle of 30-years. It is important to note that full depth reclamation is a manufacturing process and not an installation. Other pavement materials, such as concrete, asphalt, or aggregate base go through a rigorous quality control program that meets a qualified standard prior to site delivery and contractor installation. The full depth reclamation process requires the same level of understanding and product controls during lab testing and field verification to meet long-term performance goals.
ASI is the only asphalt paving contractor in Michigan that performs this work.
Our 8-Step FDR Process:
- Pre-engineer existing site for material spec and drainage
- Remove or pulverize existing asphalt
- Rough grade and balance site for new drainage pattern and for deep strength asphalt around all catch basins and adjoining areas
- Install edge drain as designed
- Apply stabilizing material
- Pulverize stabilizing material with existing material and water 12.0" deep (FDR)
- Fine grade
- Pave 3.5" to 5.0" thick, high-grade asphalt in 2 lifts