larkin
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presentTIONTRANSCRIPT
Presented to: 2012 FAA Airport Pavement Working Group Meeting
By: Al Larkin, Airport Technology, R & D
Date: April 25, 2012
Federal AviationAdministration
NON – DESTRUCTIVE AIRPORT PAVEMENT TESTING
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Non – Destructive Airport Pavement TestingApril 25, 2012
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NDT Presentation Outline
•Airport Pavement Roughness – to be presented by Dr. Hayhoe following NDT
•Nondestructive Airport Pavement Testing Survey Vehicle
•High Tire Pressure Grooving and Trafficking
•Improvements to BAKFAA
•Heavy Weight Deflectometer Roundup Update to Follow this Presentation
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Proposed Use of the FAA NDT Survey Vehicle
● The van is being used as a non-destructive pavement testing platform for airport pavement,
● The van is to be used in part to assess new and existing non-destructive airport pavement testing technology and software,
● The van will also be used to acquire non-destructive airport pavement testing data at international and general aviation airports for use at NAPTF and by NAPTF and contractor personnel.
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Status of the NDT Van
• After final outfitting, the van will have pavement imaging, Ground Penetrating Radar, GPS, and laser profiling capabilities.
• The vehicle was purchased in 2009 and delivered in June 2010.
• The NDT van was delivered in September 2011.
• The vehicle has completed interior modifications locally and imaging equipment has been used to assess CC-6.
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FAA NDT Survey Vehicle
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•Laser Based Pavement Imaging System
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FAA NDT Survey Van
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2D Image from CC-6
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3D Image from CC-6
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2D Image from CC-6 Grooving
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Grooving and Trafficking High Tire Pressure (HTP) Area
• Construct transverse rectangular and trapezoidal grooves in the HTP area.
• Both types of grooves will constructed in heated and unheated sections of the HTP.
• Profile before and after grooving.• Continue to profile at frequent intervals during
trafficking.• Groove deviations will be monitored by Selcom
laser profiles and physical measurement using tape measure and depth gage.
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Grooving and Trafficking High Tire Pressure (HTP) Area
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Grooving and Trafficking High Tire Pressure (HTP) Area
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Station
HEATED 2 HEATED 1 UNHEATED 1
TRANSITION
2 + 97.5 1+ 82.52 + 02.5
HIGH TIRE PRESSURE TESTING AREA
2 + 37.52 + 42.52 + 77.5
UNHEATED 2
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Grooving and Trafficking High Tire Pressure (HTP) Area
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o temperature treefiber optic (1 + 96, 6)(2 + 10, 2.5)
o
Grooved area Grooved areaapprox. 15 rectangular approx. 15 rectangular15 trapezoidal 15 trapezoidal
transition between unheated and heatedProposed grooving areas:
Heated test item sta. 2 + 03 to 2 + 08Unheated test item sta. 1 + 96.5 to 2 + 01.5
proposed grooving areas account for 55" drum with approximately (15) rectangular grooves and (15) trapezoidal
2 + 02.5
CLHEATED 1 UNHEATED 1
PROPOSED AREAS TO BE GROOVED IN HIGH TIRE PRESSURE TESTING AREA
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NAPTF Area for HTP Grooving
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Improvements to BAKFAA
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ITEMS IN IMPROVED BAKFAA ITEMS COMPLETED
Redesign as a .Net Application X
Capability to Process Files in Batch Mode X
Extended List of Supported File Formats X
AASHTO PDDX File Conversion Feature X
Calculation of Joint Transfer Efficiency X
Provided Compatibility of LEAF with FAARFIELD X
Output Results to an Excel File X
Interface Toggle between English and Metric X
Verification of all GUI Features X (ongoing)
Incorporation of Optimization Constraints TBD
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Supported File Types
Equipment Manufacturer Proprietary File Structure Associated file extensions
Dynatest R80 .fwd, .hwd
F20,F25 .fwd, .F20, .F25
FwdWin .fwd, .txt
KUAB KUAB .fwd, .hwd
JILS M3 .fwd, .hwd, .dat
M5 .fwd, .hwd, .dat
Carl Bro CarlBro .txt, .fwd
PaveTest PaveTest .csv
AASHTO PDDX .ddx
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Joint Transfer Efficiency
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•Approaching
•Loaded Deflection at the center of the plate compared with deflection at first sensor behind center (Sensor 3 at Offset=12.00)
•Departing
•Loaded Deflection at the center of the plate compared with deflection at first sensor in front of center (Sensor 1 at Offset=-12)
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Batch Mode Backcalculation
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•Multiple deflection record selection
•Save calculation results as .csv file•Graphical representation of calculated Modulus by selected record index
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F/HWD Round Up
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Contact Information
Al Larkin
Federal Aviation Administration
William J. Hughes Technical Center
National Airport Pavement Test Facility
Phone: (609) 485 – 5552
Email: [email protected]
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