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

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Presentation transcript:

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? 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 ” HMA over aggregate base 3” HMA + ½” base reclamation CIR = 3.8% engineered emulsion + RAP Ultra thin overlay

Mikesell Street BeforeDuringAfter

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

Minimal Disruption Hall StreetWashington 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) %20FINAL% pdfhttp:// %20FINAL% pdf Federal Highway Administration (FHWA) Transportation Research Board Michigan’s Local Technical Assistance Program