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Cold In Place Recycling

Cold In Place Recycling. City of Charlotte September, 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?.

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Cold In Place Recycling

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  1. Cold In Place Recycling City of Charlotte September, 2011 Amy E. Schoonover, PE Director of Public Works

  2. Cold In Place Recycling • Tight budget • Many streets in need of repair • Identified major and local streets that were candidates for CIR

  3. 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

  4. Background Information Needed • Details of pavement that was originally constructed • Thickness of as-built layers • Pavement cores

  5. Construction Sequence Remove castings Recycle pavement Adjust structures Place overlay

  6. 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

  7. Mikesell Street • Spartan Motors main shipping entrance- dead end street • Public school bus yard • Schedule coordination to minimize construction impact

  8. Mikesell Street • Last paving 1977 • 3” HMA over aggregate base • 3” HMA + ½” base reclamation • CIR = 3.8% engineered emulsion + RAP • Ultra thin overlay

  9. Mikesell Street Before During After

  10. Hall-Washington-McClure Streets • Last paved 1988 • 4-6” HMA • 4” HMA reclamation • CIR = 2.8% engineered emulsion + RAP • Ultra thin overlay

  11. Minimal Disruption Hall Street Washington St.

  12. Quality Assurance • Material gradation • Emulsion addition rates • Rolling patterns • Density testing

  13. Community Relations • Resident/business notification • City website • Facebook • Press Releases

  14. CIR Advantages • Environmentally friendly • Shorter construction time • Able to maintain traffic • Cost effective

  15. Emission Comparison

  16. 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.pdf • Michigan’s Local Technical Assistance Program • http://www.michiganltap.org/bridge/26-1

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