In many locations, stockpiles of high quality RAP are available and Cold Central Plant Recycling (CCPR) can produce a high quality economical paving material preventing a valuable resource from being landfilled. CCPR is the process in which the asphalt recycling takes place at a central location using a stationary cold mix plant and an existing stockpile of RAP. The stationary plant could be a specifically designed plant or a CIR train minus the cold planing machine set up in a stationary configuration. CCPR methods are also appropriate when an existing pavement cannot be in-place recycled due to logistical reasons or must be removed to allow treatment of underlying materials. CCPR mixtures can be designed for immediate use as a recycled pavement or designed for stockpiling and later use.
20-50% less expensive than conventional maintenance, reconstruction and new construction methods
Reduces greenhouse emissions by up to 50%
Resues 100% of existing materials
Same day return to traffic, 20-40% faster construction times
adds 15-20 years (combined with appropriate wearing course)
Most agencies use Structural Layer (a) Coefficients between 0.30 - 0.38 (Recent research indicates values from 0.36-0.44 may be more appropriate)
When used in place of an asphalt overlay, CCPR addresses the same distresses as the overlay
When used in conjunction with CIR, CCPR treats the same distresses to a deeper depth in the pavement structure
When used on a road that cannot be in-place recycled, CCPR treats the same distresses as CIR
CCPR can be used in new construction as a base or binder mix.
CCPR can be used to widen or pave shoulders
CCPR uses existing stockpiles of RAP
CCPR can be used when it is not possible to CIR a road