ncat/mn road - 2015 preservation group experiment
TRANSCRIPT
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NCAT Test Track ConstructionCCPR & CIR, US280 MP 132 Location
September 2015
Updated: 22.09.15Mike Marshall
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Pre-mill US280, Wirtgen W200i Milling Machine
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Pre mill depth 5 ins, to accommodate 4 ins of Recycling RAP (including fluff) with provision for 1ins HMA overlay
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Screened ¾ ins RAP at NCAT Yard
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KMA220 Cold Mix Plant Production, Foam RAP Mix
Foam CCPR
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30 t Bitumen tanker
5000 gal Water tanker20 t
Cement silo
Cold mixing plant KMA 200
350 kW Payloader
20 t tip trucks
Typical KMA220 CCPR Site Set Up
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KMA220 Cold Mix Plant Control Panel
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Foamed Asphalt Mix Design Inputs1.5% Cement, @.0% Compaction Water, 2.5% Foamed Asphalt
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Foamed Asphalt Test Nozzle KMA220 Plant Mix
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As the cement requirement was low, cement loaded into feed hopper manually
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KMA220 discharge conveyor, 100% Recycled RAP directly to truck
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Foam RAP Mix delivered to Roadtec Paver, fitted with Carlson Screed
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Foamed Asphalt RAP at Paver Screed
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Paving Foamed Asphalt RAP, Compacted to 4ins depth
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Foamed Asphalt RAP Compaction
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Completed Foam CCPR section prior to tack coat
application.
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Emulsion Tanker & Cement Feed Connection Positions
Emulsion CCPR
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Emulsion Mix Test, determine optimum moisture %age addition
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Paving Emulsion RAP after compaction 4ins depth Mix design, 3.0% Emulsion, 1.5% cement & 3.0% Compaction water
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Emulsion RAP Compaction
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Completed Emulsion CCPR section prior to tack coat application
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Tackcoat application to both Foam & Emulsion CCPR sections following compaction
Application Rate 0.050 gal/sqyd
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Both CCPR Sections, Foam & Emulsion opened to full traffic after tackcoat application
Sections were trafficked 4 hours after placing recycled RAP
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Foam RAP CCPR Section Emulsion CCPR SectionView both sections after overnight unrestricted speed high truck traffic
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Emulsion CIR
CIR Section Pre-milled to depth of 1.4ins, 1.5% cement pre-spread on milled pavement
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Wirtgen 3800CR, recycling depth, 4ins, emulsion binder, rear load directly to paver
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Emulsion recycled material loaded directly into following Roadtec paver hopper
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Paving Emulsion CIR Material
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3800CR Control panelEmulsion mix design, 3.3% emulsion, 3.3% added compaction water
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Emulsion CIR Compaction
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Completed Emulsion CIR Section
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Foam CIR
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