Post on 06-Oct-2020
2017
AIRPORT PAVEMENT MANAGEMENT
Pavement Management
Tom Freeman
Program Manager, Pavement ManagementTexas A&M Transportation Institute
Phone: 979-317-2320
E-Mail T-Freeman@TAMU.EDU
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Pavement Management
PMS Concepts
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Pavement Management
Based on finding a cost-effective treatment,
At a given time,
To give the desired level of service.
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PMS Concepts
Pay me NOW!
or
Pay me LATER!
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PMS Concepts
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PMS Concepts
Good Pavement Costs LessThan Bad Pavement
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PMS Concepts
Good Pavement Costs LessThan Bad Pavement
Over the long-term
If and reasonable level of service is provided
If the pavement will respond to preventive maintenance
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Airport Pavement Inspection
Old Method was Based on LOI Currently on Inspection Schedule
Approximately 90/Yr
3 Year Cycle
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Airport Pavement Inspection
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Airport Pavement Inspection
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Airport Pavement Inspection
TEXT
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Airport Pavement Inspection
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Airport Pavement Inspection
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Airport Pavement Inspection
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Airport Pavement Inspection
Inspect Aircraft Pavements FAA Condition Survey (150/5320-17A)20% Inspection Rate
– 2 Runways (Usually)– Taxiways– Aprons
Overall and Close-up Pictures of– RW Center, Edge, Close-up, and RW Extended– Each Section– Office, Fuel Area
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Airport Pavement Inspection
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Airport Pavement Inspection
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Airport Pavement Inspection
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Airport Pavement Inspection
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Airport Pavement Inspection
Inspect Aircraft Pavements Videos
– 360o at Runway Ends and Center-ish– Pavement Condition Discussion– High-speed (60mph) – Tour of TWs and Aprons– Entrance Road
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Airport Pavement Inspection
TEXT
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Airport Pavement Inspection
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Airport Pavement Inspection
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Airport Pavement Inspection
Inspect Aircraft Pavements Other Testing
– Deflection
– Profile
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Airport Pavement Inspection
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Airport Pavement Inspection
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Airport Pavement Inspection
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Airport Pavement Inspection
Summarize Quantities
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Airport Pavement Inspection
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Airport Pavement Inspection
Write Final Report
– Send to Aviation
– Sent to Airport Manager
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Lessons Learned
Three Major Distresses
–Edge Cracking and Encroachment
–Block Cracking
–Weathering and Raveling
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Edge Cracking and Encroachment
Probably LowSeverity
Lessons Learned
Not Low Severity!
Lessons Learned
Lessons Learned
Edge Happens !!– Moisture Changes Along Edge of Pavement
• Less Water Under Pavement
• More Water Along Edge
– Soil Shrinks and Swells
– Differential Temperature
– Fix By Crack Sealing (Kill Weeds)
– May Be Able To Address In Design - Wider Bases
Encroachment
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Lessons Learned
Encroachment–Weeds and Grasses Along Edge of Pavement
–Causes Cracking Along Edge, FOD, Weathering of Pavement
–Reduces Width of Pavement
–Fix With Mowing, Herbicide, Grading, Millings, Wider Bases
Block Cracking - Low SeverityLessons Learned
Medium Block Cracking, Medium Weathering
Lessons Learned
Lessons Learned
What Causes This?–Sun/Ultraviolet and Oxygen Remove Volatiles
(Maltenes)
–Pavement Gets Brittle
–Daily and Annual Temperature Cycling
–Lack of Traffic
–Asphalt Wears Away, Aggregate Gets Loose
–Hello FOD, Goodbye Paint
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Lessons Learned
For Airports, Block Cracking is Death.
–No Inexpensive Treatments to Fix
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Lessons Learned
What Fixes This–Fix By Mill and Overlay, Cape Seal, or Reconstruct
• Expensive
• Deteriorates Slowly, So We Can Wait. Fog to Reduce Rate
• Best to PREVENT
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Lessons Learned
Weathering and Ravelling– Weather is Loss of Fine Aggregate
– Ravelling is Loss of Coarse Aggregate
– Most Common Distress
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Lessons Learned
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Lessons Learned
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Lessons Learned
What Fixes This• Fix Weathering and Raveling by Fog, Coal Tar, Rejuvenator,
Slurry, Overlay, Reconstruct
– Best to PREVENT
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Lessons Learned
Plan of Attack– Seal Cracks (Every Two Years@ $0.10/Ft)
– Blade Edges and Kill Weeds (Annual)
– Fog Seal (Every 2-4 Years @ $0.10 - $0.20/SY)
– Rejuvenator (See Manufacturer)
– Slurry Seal (5-7 Years @ $1/SY)
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Lessons Learned
Why Preventive Maintenance?
Why Not Just Let it Rot?
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Lessons Learned
Advantages of a Preventive Maintenance Strategy
• Lower Overall Cost
• Better Overall Condition
• Fewer Complaints
• Less Down Time
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0 10 20 30 40 50Age
PC
IPreventiveMaintenance
$1.50/SY $1.20/SY $1.50/SY
Total = $4.20
Runway Closed 1 - 3 Days Each Time
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0 10 20 30 40 50Age
PCI
Overlay
$6/SY $6/SY $6/SY
Total = $18
Runway Closed 4 - 10 Days Each Time
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0 10 20 30 40 50Age
PC
IReconstruct
$12/SY $12/SY
Total = $24
Runway Closed 4- 6 Months Each Time
Where Do You Turn For Assistance TxDOT
– Division of Aviation
• 1-800-68-Pilot
Department of Transportation
• RAMP Coordinators
Consultants
Me - Tom Freeman 979-317-2320T-Freeman@TAMU.EDU
Finale
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Questions?