Cold In Place Recycling City of Charlotte September, 2011 Amy E. Schoonover, PE Director of Public...
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Transcript of Cold In Place Recycling City of Charlotte September, 2011 Amy E. Schoonover, PE Director of Public...
Cold In Place Recycling
City of CharlotteSeptember, 2011
Amy E. Schoonover, PE Director of Public Works
Cold In Place Recycling• Tight
budget• Many
streets in need of repair
• Identified major and local streets that were candidates for CIR
Can We Use CIR?
• No utility work needed under the street• Evaluate type of distress that needs to be
addressed• Quality of the material to be recycled• At least 3 inches of asphalt
Background Information Needed
• Details of pavement that was originally constructed
• Thickness of as-built layers• Pavement cores
Construction Sequence
• Remove castings
• Recycle pavement
• Adjust structures
• Place overlay
Charlotte’s Project• 1.2 miles of 3
½-4” CIR (18,000 SY)
• Single train• Engineered
asphalt emulsion
• ¾” ultra-thin overlay
• Mikesell Street• Hall,
Washington, McClure Streets
Mikesell Street• Spartan
Motors main shipping entrance- dead end street
• Public school bus yard
• Schedule coordination to minimize construction impact
Mikesell Street• Last paving
1977• 3” HMA over
aggregate base
• 3” HMA + ½” base reclamation
• CIR = 3.8% engineered emulsion + RAP
• Ultra thin overlay
Mikesell Street
Before During After
Hall-Washington-McClure Streets
• Last paved 1988
• 4-6” HMA
• 4” HMA reclamation
• CIR = 2.8% engineered emulsion + RAP
• Ultra thin overlay
Minimal Disruption
Hall Street Washington St.
Quality Assurance• Material
gradation
• Emulsion addition rates
• Rolling patterns
• Density testing
• Resident/business notification
• City website• Facebook• Press Releases
Community Relations
CIR Advantages
• Environmentally friendly• Shorter construction time• Able to maintain traffic• Cost effective
Emission Comparison
Additional Resources
• Asphalt Recycling and Reclaiming Association (ARRA)
• http://www.pavementpreservation.org/toolbox/links/CR%20Brochure%20FINAL%2008-26-05.pdf
• Federal Highway Administration (FHWA)• www.fhwa.dot.gov/pavement/preservation/ppcl12.cfm
• Transportation Research Board• http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_syn_421.p
df
• Michigan’s Local Technical Assistance Program• http://www.michiganltap.org/bridge/26-1