For Pavement Condition
C
D
F
(PCI of 70 or less)
A cost-effective, long-lasting, greener alternative to conventional maintenance and rehabilitation techniques. Cold In-place recycling (CIR) is a process that cold mills and recycles the top 2-5 inches of asphalt using a continuous train operation. Through the complete reuse of existing material, CIR greatly reduces trucking, time and natural resources to significantly lower project costs. Generally, any road that is a candidate for mill & fill is a candidate for CIR.
- 20%–50% less expensive than conventional maintenance and reconstruction methods
- Reduces greenhouse emissions by up to 90%
- Reuses 100% of existing materials
- 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)
Issues Addressed
- Frequent, severe, non-load distresses in top lift of hot mix
- All distresses within the recycling depth (2-5 inches)
- Reflective cracking from below CIR layer
Attributes
- Eliminates defects within the recycling depth
- Blocks or slows reflective cracking
- Reuses existing material in place
- Replaces 1 or 2 lifts of hot mix
- Allows for road widening where desired
Common Combinations
- CIR + hot mix overlay (most common)
- CIR + Single or Double Chip Seal for low volume roads
- CIR + Micro or Slurry Surfacing for low volume roads
- CIR + CCPR to increase treatment depth
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