AIRPORT PAVEMENT MANAGEMENT€¦ · Pavement Management. Tom Freeman. Program Manager, Pavement Management. Texas A&M Transportation Institute. Phone: 979-317-2320. E-Mail [email protected]

2017

AIRPORT PAVEMENT MANAGEMENT

Pavement Management

Tom Freeman

Program Manager, Pavement ManagementTexas A&M Transportation Institute

Phone: 979-317-2320

E-Mail [email protected]

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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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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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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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Inspect Aircraft Pavements Other Testing

– Deflection

– Profile

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Summarize Quantities

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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 [email protected]

Finale

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Questions?

Documents

AIRPORT PAVEMENT MANAGEMENT€¦ · Pavement Management. Tom Freeman. Program Manager, Pavement Management. Texas A&M Transportation Institute. Phone: 979-317-2320. E-Mail [email protected]