Pulverization and Mechanical FDR
Bituminous Stabilized FDR
Chemical Stabilized FDR
Pulverizing fluffs up the reclaimed material and this must be accounted for when checking treatment depths. A tolerance of 1/2 inch is usually allowed.
To prevent the risk of a thin layer of pulverized but untreated stabilized material the final mixing pass is made deeper than the previous passes.
Monitor speed of reclaimer and door openings of cutting chamber to ensure proper blending and gradation.
Application of Granular Materials and Dry Stabilizing Agents
Application of Stabilizing Agents Applied as Slurry
Restrict overall time from initial blending of chemical stabilizers through final rolling to no more than 2 hours.
Application of Bituminous Stabilizing Agents
Check depth of mixing by removing the pulverized material on each side of the reclaimer and checking the depth. Pulverizing fluffs up the material and should be accounted for when determining treatment depths. A tolerance of ± 1/2 inch (12.5 mm) is usually allowed.
Overlap longitudinal joints a minimum of 6 inches and transverse joints a minimum of 2 feet
If the FDR surface must be opened to high traffic counts a curing membrane and blotter sand is recommended to protect the surface. Remove the blotter sand before appling a surface course.