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Recycling and Reclamation of Airfield Pavements

Recycling and Reclamation of Airfield Pavements. 35 th Airports Conference FAA Eastern Region, Hershey, PA April 4, 2012. Campbell & Paris Engineers, 35 th Airports Conference. Items for Discussion. Brief Introduction (Mark McGuire, P.E. C&PE)

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Recycling and Reclamation of Airfield Pavements

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  1. Recycling and Reclamation of Airfield Pavements 35th Airports Conference FAA Eastern Region, Hershey, PA April 4, 2012 Campbell & Paris Engineers, 35th Airports Conference

  2. Items for Discussion • Brief Introduction (Mark McGuire, P.E. C&PE) • Potential Applications / Recent Project Examples • Construction Specifications / FAA MOS process • Mix Designs / Construction Schedules • Equipment / Advancements / Videos - References • Economic Impacts / Environmental Benefits / ACRP 42 • Questions Campbell & Paris Engineers, 35th Airports Conference

  3. Brief Introduction Campbell & Paris Engineers, 35th Airports Conference

  4. Brief Introduction • Recycling existing Bituminous Concrete, Portland Cement Concrete, and Crushed Aggregate Materials • Mobile Jaw Crushers / Mobile Impact Crushers • Mobile Screens / In-Place Recyclers / Mobile Secondary Crushers Campbell & Paris Engineers, 35th Airports Conference

  5. Potential Applications / Recent Project Examples • Re-Use of Materials on Site • RAP – as a base course / aggregate substitute (D-754 ditches) • RAP material condition assessment (binder) – may be more valuable at mixing plant ($10 per ton) Campbell & Paris Engineers, 35th Airports Conference

  6. Potential Applications / Recent Project Examples • Re-Use of Materials on Site • RAP – as a base course / aggregate substitute (P-610 ditches) • RAP material condition assessment (binder) – may be more valuable at mixing plant ($10 per ton) Campbell & Paris Engineers, 35th Airports Conference

  7. Potential Applications / Recent Project Examples • Re-Use of Materials on Site (RAP Stockpile) • RAP – stock pile location • Calculating waste – depends who you ask! Campbell & Paris Engineers, 35th Airports Conference

  8. Potential Applications / Recent Project Examples • Re-Use of Materials on Site – Mix In Place Operations • Cement Treated Aggregate / Base Course (Manassas Regional Airport) Campbell & Paris Engineers, 35th Airports Conference

  9. Potential Applications / Recent Project Examples • Re-Use of Materials on Site – Mix In Place Operations • Cement Treated Aggregate / Base Course • Cement Added • Mix In Place Campbell & Paris Engineers, 35th Airports Conference

  10. Potential Applications / Recent Project Examples • Re-Use of Materials on Site – Mix In Place Operations • Cement Treated Aggregate / Base Course (Burlington Int. Airport) Campbell & Paris Engineers, 35th Airports Conference

  11. Potential Applications / Recent Project Examples • Re-Use of Materials on Site – Mix In Place Operations • Cement Treated Aggregate / Base Course (Burlington Int. Airport) Campbell & Paris Engineers, 35th Airports Conference

  12. Potential Applications / Recent Project Examples • Re-Use of Materials on Site – Mix In Place Operations • Cement Treated Aggregate / Base Course (Burlington Int. Airport) Campbell & Paris Engineers, 35th Airports Conference

  13. Project Specifications / FAA MOS Process • RAP Specification • FDR Specification • DOT/FAA Order 5300.1F • Eastern Region 5300 Form Campbell & Paris Engineers, 35th Airports Conference

  14. Mix Designs / Construction Schedules • Access to Site to Obtain Material • Specification requirements for mix designs: open to interpretation or strict requirements? • Does the schedule account for the laboratory time to process the mix designs? • Initial paperwork Milestone: QC Plan, Construction Schedule, Submittals, & Mix Designs Campbell & Paris Engineers, 35th Airports Conference

  15. Equipment / Advancements / Videos (source: Wirtgen America) Campbell & Paris Engineers, 35th Airports Conference

  16. Equipment / Advancements / Videos (source: Wirtgen America) Campbell & Paris Engineers, 35th Airports Conference

  17. Equipment / Advancements / Videos (source: Wirtgen America) • Ripped Asphalt • Large slab feed. Often contaminated with dirt. • Milled Asphalt • When stockpiled it often clumps together. Campbell & Paris Engineers, 35th Airports Conference

  18. Equipment / Advancements / Videos (source: Wirtgen America) Flaky aggregates Elongated aggregates Cubical aggregates Benefits of shape Road aggregate • Better compaction • Improved mechanical properties • Better layer’s stability • Better wear resistance Concrete aggregate • Better flow ability • Better compaction • Better quality • Less cement and water Campbell & Paris Engineers, 35th Airports Conference

  19. Equipment / Advancements / Videos (source: Wirtgen America) Jaw Crusher 7:1 reduction ratio = 25” feed reduced to 3.5” final product size Horizontal Shaft Impact Crusher 15:1 reduction ratio = 25” feed reduced to 1 ½” final product size Vertical Shaft Impact Crusher 4:1 reduction ratio = 3” feed reduced to ¾” final product size Cone Crusher 5:1 reduction ratio = 4” feed reduced to 13/16” final product size Campbell & Paris Engineers, 35th Airports Conference

  20. Equipment / Advancements / Videos (source: Wirtgen America) Horizontal shaftimpactcrusher Primary, Secondary and Tertiary crushing. • crushing ratio max. 15:1 advantages disadvantages • high wear costs • high content of fines • high production • cubicalshaped end product • large crushingratio • flexabile Campbell & Paris Engineers, 35th Airports Conference

  21. Economic Impacts / Environmental Benefits • SOCIAL, ECONOMIC, AND SUSTAINABLE DESIGN CONSIDERATIONS • Typical Recycling or Mix in Place operations have the following benefits: • Eliminate operations associated with full depth demolition and removal of pavement section • Eliminate off-site hauling operations • Reduce risk and potential delay associated with subgrade exposure • Alleviate construction efforts required for achieving compaction of problematic subgrade • Eliminate necessity for quarry to produce virgin aggregate material • Eliminate batch plant operations for new material (if applicable) • Eliminate hauling operations associated with importing new material • Simplified construction methods requiring less equipment and man-power to complete construction Campbell & Paris Engineers, 35th Airports Conference

  22. Economic Impacts / Environmental Benefits Campbell & Paris Engineers, 35th Airports Conference

  23. Economic Impacts / Environmental Benefits Campbell & Paris Engineers, 35th Airports Conference

  24. Economic Impacts / Environmental Benefits Campbell & Paris Engineers, 35th Airports Conference

  25. Economic Impacts / Environmental Benefits Campbell & Paris Engineers, 35th Airports Conference

  26. Questions? Campbell & Paris Engineers, 35th Airports Conference

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