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BEST PRACTICES for ASPHALT PAVING FIELD OPERATIONS

BEST PRACTICES for ASPHALT PAVING FIELD OPERATIONS

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BEST PRACTICES for ASPHALT PAVING FIELD OPERATIONS

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  1. BEST PRACTICES for ASPHALT PAVING FIELD OPERATIONS

  2. BEST PRACTICES for ASPHALT PAVING FIELD OPERATIONS “Quality Means doing it right when no one is looking.” – Henry Ford

  3. PRE-PAVE PLANNING (Project Engineer / Paving Foreman) • Check for availability of plant and material • Specialized equipment needs: road widener, road grader, walk behind rollers, automatics, mobile reference, etc… • Have plan if inclement weather might be encountered • What is the Specified Tack Material • Will a Necept certified technician be on site? • Is a density gauge required? • Have a plan for constructing & compacting the longitudinal joint?

  4. MOBILIZATION (Foreman / Equipment Manager) • Equipment delivery • Proper equipment • Clean and serviced • Designated delivery area

  5. PRE-PAVING DAILY (Project Engineer / Paving Foreman) • Daily Scheduling of Materials and Personnel • Check existing conditions again of area to be paved that day • Are we within surface & air temp requirements? • Is surface preparation or cleaning necessary? • Tack certification/rate/temp/break • Verify application rate

  6. TACK APPLICATION (Driver / Paving Foreman) • Have a properly calibrated distributer with a copy of certificate inside truck • Adjust bars and nozzles to achieve proper width and rate • Do not tack a larger area than can be protected • Make sure tack is cured before paving over

  7. TACK APPLICATION (Driver / Paving Foreman) • Do not tack a larger area than can be protected or paved over in the event of breakdown or inclement weather

  8. PAVER SETUP (Paving Foreman/Mechanic-Equipment Dept.) • Lead crown • Auger height/head of material control • Feed speed • Paving speed to match production • Pre strike • Angle of attack

  9. Paver Speed Head of Material Angle of Attack Paver Setup: Factors Effecting the Screed’s Performance Depth Crank Tow Point Pivot Point • Angle of Attack Paving Speed Head of Material Material Workability

  10. PAVER SETUP (Paving Foreman/Mechanic-Equipment Dept.) • Lead crown • Auger height/head of material control • Feed speed • Paving speed to match production • Pre strike • Angle of attack • Automatic/manual-depth & slope control • Use of mobile reference/joint matcher, etc.. • Use of auger extensions • Establish a guide line for paver to follow

  11. PAVER SETUP

  12. 80-85% Gmm PAVER SETUP SCREED WITHOUT VIBRATION 75 - 80% Gmm SCREED WITH VIBRATION

  13. Never allow material lower than the flow gates Control the Head of material ± 1” @ ½ auger No Wings Cycling if Hopper near Empty Prevent accumulation of material in the corners. 4 steps Dumping Procedure No Spillage. FIELD OPERATIONS Segregation: Paver Operation 4 Screed hot spots Courtesy Caterpillar

  14. 3 1 2 4 FIELD OPERATIONS 4 Potential Areas of Segregation: Center drive Quarter point End Conveyors Tunnel – Edger plates Courtesy Ingersoll-Rand

  15. SEGREGATION CONTROL Possible Areas of Segregation: Elevator Hot Bins Silos Loading Pug Mill Dryer Stockpiles Cold feeds

  16. RELEASE AND FIRST LOAD (Paving Foreman) • Check first ticket for proper information • Job Mix Formula (JMF) • Tonnage • Date • Temperatures • Mix Design • Asphalt Affidavit

  17. MIX DESIGN

  18. TRUCKS (Paving Foreman / Dump Foreman) • Are they arriving on time and properly tarped? • Have a Dump man or other designated ticket exchange person. • Insure smooth pickup by paver/MTV • Take initial and intermittent temperature checks in the field • Have a designated clean out area

  19. GOOD

  20. NOT ACCEPTABLE

  21. FIELD QC on PAVING DAY (Field Technician, Paving Foreman, Operators) • Review the placement mix design • Review the sampling plan if there are cores/boxes to be taken • If a density gauge is required, has it been standardized? • Understand depth and width requirements and monitor during placement • Who will straightedge any transverse joints?

  22. FIELD QC on PAVING DAY (cont) (Paving Foreman Field Technician / Operator) • Rolling Train • Check water systems on rollers • Set roller amplitude and frequency for given placement • Special requirements/techniques if rubber tire is in use • Set up initial rolling pattern with operators and monitor • Monitor density and temperature of mat • Monitor density and appearance of joints • Check appearance of mat finished product • Adjust rolling pattern as needed

  23. Proper Spacing Too Far Apart OPERATIONS: ROLLERS • Vibration • Amplitude • Frequency • Impact per Foot • Travel Speed IPF = 12 @ 2400 VPM - Travel Speed = VPM/IPF = 200 FPM @ 3600 VPM - Travel Speed = VPM/IPF = 300 FPM

  24. OPERATIONS: ROLLERS • Kneading STATIC COMPACTION • Static Loading Pounds per Linear-Inch • Roller Weight • Drum width • Drum diameter • Roller Weight • Tire Profile • Tire Pressure

  25. ROLLING TECHNIQUES (Field Tech / Paving Foreman / Operator) • How to stop at end of pass

  26. ROLLING TECHNIQUES (Field Tech / Paving Foreman / Operator) • How to deal with stoppages

  27. MATERIAL SAMPLING -LOOSE BOXES (Field Technician)

  28. MATERIAL SAMPLING -LOOSE BOXES (Field Technician)

  29. MATERIAL SAMPLING -LOOSE BOXES (Field Technician)

  30. MATERIAL SAMPLING -LOOSE BOXES (Field Technician)

  31. MATERIAL SAMPLING - CORES

  32. COMMUNICATIONS (All Responsible Parties) • Paving Crew / Plant • Within crew • Everyone has a responsibility and everyone needs to know what that is! • Foreman, Technicians, Mechanic, Operators

  33. RECORDKEEPING (All) • Required paperwork for agency/owner • In House Paperwork: • Density readings • Ambient and surface temps • Material temps • roller settings and # of passes, • troubleshooting, etc… (Build a solid database of information – know what works for any given situation)

  34. ROLLING PATTERN FORM

  35. SAFETY EDGE Courtesy of PennDOT LTAP

  36. SAFETY EDGE Courtesy of PennDOT LTAP

  37. SAFETY EDGE Courtesy of PennDOT LTAP

  38. SAFETY EDGE Courtesy of PennDOT LTAP

  39. Thank You! Greg Tomon Quality Control Field Manager Lindy Paving gtomon@lindypaving.com Courtesy ODOT