RMI DOT Presentation

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RMI DOT Presentation

  1. 1. PAVEMENT REHABILITATION RESONANT RUBBLIZING
  2. 2. What is Rubblizing? The Process of Fracturing Pavement of Portland Cement Concrete into Angular Pieces for Direct Overlay
  3. 4. Application of Recycling the Concrete Pavement (Rubblizing) Environmentally Friendly Construction
  4. 5. PSI Number of Years Reflection: Evolution of the Deterioration Quality of the Road 5 1 4 3 2
  5. 6. PSI Number of Years Quality of the Road Rehabilition of Concrete Pavement 5 1 4 3 2
  6. 7. Rubblizing Rehabilition of Concrete Pavement
  7. 8. Rubblizing Rehabilition of Concrete Pavement
  8. 9. Rubblizing Rehabilition of Concrete Pavement
  9. 10. Structural Design: Correlations 1 to 8”
  10. 11. DESCRIPTION OF TECHNICAL RUBBLIZING
  11. 12. Description of Rubblizing Equipment Pedestal / Shoe Resonant Beam Weight Flotation Tires Motor Computer Controls
  12. 13. Description of Resonant Beam Frequency 44 Hz Amplitude 3/4” Vibration Technology Weight
  13. 14. Vibration Technology Weight Frequency 44 Hz Amplitude 3/4” Description of Resonant Beam
  14. 15. Frequency 44 Hz Amplitude 3/4” Vibration Technology Weight Description of Resonant Beam
  15. 16. Operational Data of Equipment <ul><li>Strikes PCC 44 Times per Second </li></ul><ul><li>2,000 lbs. of Pressure Per Strike </li></ul><ul><li>Beam Weighs 4080 kg. </li></ul><ul><li>Raises 3/4” Per Strike </li></ul><ul><li>Machine Speed at Approx. 4-5 mph </li></ul><ul><li>Breaking Area is 10” Wide </li></ul><ul><li>Average Rubblized Per Day: 7,000 sq. yd </li></ul>
  16. 17. STRUCTURAL DESIGN
  17. 18. Structural Design: Methods <ul><li>AASHTO – Procedure Design (SN) </li></ul><ul><li>Asphalt Institute – Series Manuals (MS) -17 </li></ul><ul><li>NAPA – Series Information (IS) –117 </li></ul><ul><li>Airfield Asphalt Pavement Technology Program - AAPTP </li></ul>
  18. 19. Structural Design: State Studies <ul><li>Over 20 Studies from Multiple States support that rubblizing provides: </li></ul><ul><ul><li>Long life for surfaces – 22+ years </li></ul></ul><ul><ul><li>Smooth driving conditions </li></ul></ul><ul><ul><li>Rubblization eliminates reflective cracking and dramatically reduces surface defects </li></ul></ul>Alabama Michigan
  19. 20. Structural Design: Evaluation <ul><li>Pavement after years of use and deterioration. </li></ul><ul><li>Expert analysis is required to insure that the cause of the failure of the pavement. </li></ul><ul><li>If the Damage does Not arise the Subgrade or Sub-Base Problems, Pavement is a Candidate for Rubblization. </li></ul><ul><li>If the Subgrade has Problems, Rubblization will Not Eliminate the Issue. </li></ul>
  20. 21. Structural Design: Drainage <ul><li>Proper Drainage System should be Installed or Repaired Prior to Rubblizing the Pavement. </li></ul><ul><li>Varying Methods of Drainage can be Used Depending on the Site. </li></ul>
  21. 22. Structural Design: Drainage 10 cm open-graded 5 cm dense-graded # 57 Stone 3 % Slope Outlet Filter Fabric Shoulder Area Rubblized PCC Base Course Subgrade Permeable Zone Relief Cut @ 9-12 m.
  22. 23. The Modulus of the Rubblized Concrete depends on the Thickness, Subbase and Subgrade. Typically Rubblized Concrete is 2.5 Times Stronger than any Granular Material. Structural Design: Scope E 1 E 3 > E 2 E 4 > E 3 Where E 3 = f (E 2 ) Where E 2 = f (E 1 ) E 2 > E 1 Subbase Sub grade
  23. 24. Coefficient Structure (a i ) vs. Modulus (M r ) AASHTO Structural Design: Coorelations
  24. 25. CONSTRUCTION PROCESS
  25. 26. Rubblizing Process <ul><li>Three Stages of Construction: </li></ul><ul><li>Rubblizing </li></ul><ul><li>Rolling </li></ul><ul><li>Asphalt Overlay </li></ul>
  26. 27. Prior to Rubblizing Process <ul><li>Repair or Replace Drainage System </li></ul><ul><li>Remove any Asphalt Overlay Currently in Place </li></ul>
  27. 28. Resonant Rubblizing <ul><li>Capable of Rubblizaing up to 26 inches </li></ul><ul><li>Ideal Distance Per Run - One Mile / One Lane Wide </li></ul><ul><li>Speed of Resonant Machine 4 to 5 mph </li></ul>
  28. 29. Test Pit Confirm Specification and Debonding
  29. 30. Wright Patterson
  30. 31. <ul><li>10 Ton High Frequency, Low Amplitude Steel Drum Roller (3 Passes) </li></ul><ul><li>Only Equipment Necessary After Rubblization </li></ul><ul><li>Not Recommended to Drive on Prior to Asphalt Overlay </li></ul>Rolling
  31. 32. Asphalt Layer <ul><li>Leveling Course on First Lift with Ability to Open Traffic </li></ul><ul><li>No Primer Required on Rubblized Layer </li></ul><ul><li>Minimum of 5 inches of Asphalt Overlay </li></ul>
  32. 33. Next Day - Open Traffic
  33. 34. Recommended State Specification <ul><li>High Frequency Low Amplitude Resonant Breaker </li></ul><ul><li>Resonant Breaker shall apply 2,000 lbs of pressure per strike at 44 hertz </li></ul><ul><li>Removal of any Existing Asphalt Overlay </li></ul><ul><li>Majority of Particle Size of Less than 6 Inches </li></ul><ul><li>Maximum Particle Size of 8 Inches </li></ul><ul><li>10 Ton High Frequency - Low Amplitude Vibratory Roller </li></ul><ul><ul><li>3 Passes with Maximum Speed of 6 Feet per Second </li></ul></ul><ul><li>Minimum of 80% Debonding of Existing Steel Reinforcing </li></ul><ul><li>No Traffic on Rubblized Slab Until First Lift is Placed </li></ul><ul><li>Minimum of 5 inches of Hot Mix Asphalt Overlay </li></ul>
  34. 35. Results – 22 Year Road

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