What is Full Depth Reclamation?
FDR is an economical, in-place recycling alternative to road reconstruction. It uses a powerful reclaiming machine to turn an old asphalt pavement into a road base by uniformly pulverizing that full thickness of the old pavement and blending it with a portion of underlying material. This process usually adds bituminous emulsion, chemical or mechanical stabilization agents to enhance the strength of the new base that is sealed with an asphalt friction course or a sealing treatment, depending on expected loads. The process allows for correcting drainage and cross slope problems, as well as widening the roadway.
FDR should be considered when a pavement can’t be salvaged with milling, overlaying, or recycling techniques due to severe pavement defects, poor drainage, or an inadequate base.
FDR should not be considered when the existing pavement can be preserved with lesser interventions.
How Does it Work?
Full depth reclamation is a process that offers economic advantages and design alternatives to roadway reconstruction. But how does it work?
The full-depth reclamation process revolves around the ability to pulverize and blend the deteriorated pavement structure to a specified maximum gradation and incorporate that material into the structural design of the restored roadway. Full depth reclamation offers several in-place alternatives to the designer in creating the desired roadway section.
Full Depth Reclamation is the multi-tool of pavement recycling. FDR is used at airports, on the interstate, in the suburbs, county roads, city streets, ports, railyards, and on state highways. FDR is a robust system that can be tailored to your specific application. The process allows for the incorporation of stabilization additives such as: cement, lime, fly ash, LKD, CKD, foamed asphalt, emulsion, BaseONE, calcium chloride, magnesium chloride, add rock, etc. These additives will enhance the structural or flexural characteristics of your FDR layer.
What it Costs
Full depth reclamation generally costs 30-50% less than traditional road reconstruction.