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FAA Pavement RD Program Update

January 21, 2007. Acknowledgments. Staff @ NAPTFSatish AgrawalGordon HayhoeRobert Murphy" FlynnAlbert LarkinNavneet GargDavid BrillDon Barbagallo. ConsultantsRoy McQueenDick Ahlvin. Support Contractor SRAChuck TeubertEdward GuoMay DongIzydor KawaLia RicaldeInjun SongQuing WangQ

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FAA Pavement RD Program Update

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    1. FAA Pavement R&D Program Update

    2. January 21, 2007 Acknowledgments Staff @ NAPTF Satish Agrawal Gordon Hayhoe Robert “Murphy” Flynn Albert Larkin Navneet Garg David Brill Don Barbagallo Consultants Roy McQueen Dick Ahlvin Support Contractor – SRA Chuck Teubert Edward Guo May Dong Izydor Kawa Lia Ricalde Injun Song Quing Wang Qingge Jia

    3. January 21, 2007 Outline Introduction FAARFIELD 1.3 – Pavement Design ProFAA- Roughness Software FEAFAA – Finite Element Analysis PAVEAIR – New Web-Based Airport PMS Flexible Pavement Full-Scale Tests (CC5) Airfield Superpave Specifications ASR Full Scale Testing Plan Airport Technology Transfer Conference 2010

    4. January 21, 2007 Federal Aviation Administration Airport Technology R&D Program Research conducted at the FAA William J. Hughes Technical Center, Atlantic City, NJ, USA. Sponsor: FAA Office of Airport Safety and Standards (AAS100), Washington, DC. Provide support for development of FAA pavement standards (Advisory Circulars). http://www.airporttech.tc.faa.gov/

    5. January 21, 2007 Location of FAA Technical Center

    6. January 21, 2007 National Airport Pavement Test Facility (NAPTF) Fully enclosed facility for accelerated traffic testing of airport pavements. Full-scale pavement structures and landing gear loads with programmed wander. Opened in 1999. Total construction contract was $21M. $14M from FAA $7M from Boeing Co. under FAA/Boeing CRDA.

    7. January 21, 2007 NAPTF Construction Cycle (CC)

    8. January 21, 2007 FAARFIELD – What is it Federal Aviation Administration Rigid and Flexible Iterative Elastic Layered Design Computer program for desktop PCs. Program preserves the “look and feel” of LEDFAA 1.3. Major changes are internal. Incorporates advanced structural models: 3-D finite element analysis for rigid pavements and overlays. NIKE3D (3D finite element analysis) INGRID (3D mesh generation) Layered elastic analysis (LEAF) for flexible pavements and overlays.

    9. January 21, 2007 FAARFIELD 1.3 Computer program for desktop PCs. Program preserves the “look and feel” of LEDFAA 1.3. Major changes are internal. Main program drives three subprograms: LEAF (layered elastic analysis) NIKE3D (3D finite element analysis) INGRID (3D mesh generation)

    10. January 21, 2007 FAARFIELD 1.3 Key Differences from LEDFAA 1.3 Rigid Pavements/Overlays Slab edge stresses are now computed directly using 3D-FEM. Completely revised rigid pavement failure model. Rewrote and improved rigid overlay design procedures. Flexible Pavements/Overlays Automatic base thickness design. Supports HMA overlay design on rubblized PCC base. General Upgrade to MS Visual Basic.NET programming environment. Aircraft library updated. Improved runtime guidance based on AC 150/5320-6E. New function allows user to export design data to XML. Improved formatting for Notes. All user options collected on one “Options” screen. Improved Pass-to-Coverage ratio computation routine.

    11. January 21, 2007 FAARFIELD 1.3 Additional Changes in Version 1.3 Pavement thickness is now computed for constant tire contact area. Changing the airplane gross weight causes the tire pressure to be adjusted to maintain the contact area. External aircraft library in XML format. Displays CDF values graphically. Enhanced Airplane Data window now displays gear coordinates. Support for PCC over rubblized base.

    12. January 21, 2007 FAARFIELD Workshops FY08 Workshops: London, UK (Nov. 1, 2007) Allen, TX (Nov. 16, 2007) Lima, Peru (Nov. 13, 2007) Phoenix, AZ (TSW, April 21, 2008) FY09 Workshops: Singapore (Oct. 10, 2008) Bellevue, WA (ASCE/ T&DI Pavement Conf. Oct 14, 2008) Mexico City, Mexico (Oct. 30, 2008) Amsterdam, Netherlands (CROW, May 12, 2009) Champaign, IL (BCR2A, June 29, 2009) Additional workshops to be announced.

    13. January 21, 2007 ProFAA – What Is It? Profile Federal Aviation Administration ProFAA is the FAA’s computer program for computing pavement elevation profile roughness indexes. Straight Edge Boeing Bump International Roughness Index (IRI) California Profilograph (PI) RMS Bandpass Aircraft Simulation

    14. January 21, 2007 ProFAA - Pavement Roughness Develop & Establish Standards for Measuring and Reporting Pavement Roughness Determine Ride Quality within Cockpit and Cabin PROFAA Workshops 1st one - Phoenix, AZ (TSW, April 21, 2008) Additional workshops to be announced Assist in the Development of New Advisory Circular Draft AC 150-5380-9 “Guidelines and Procedures for Measuring Airfield Pavement Roughness” Issued July 28, 2008

    15. January 21, 2007 FEAFAA 1.1 Upgrades Non-uniform mesh replaced by a uniform 3D mesh for PCC slabs. This recognizes the need to obtain accurate responses at distances from the wheels, and allows moving wheel loads to be modeled more easily. The uniform mesh size can be varied by the user within an appropriate range. Gear can now be positioned arbitrarily with respect to the slab edges. Slab self-weight is now included by default. The maximum number of equilibrium iterations permitted before the stiffness matrix is reformed was increased. The subroutine for setting penalty scale factors for sliding surfaces was changed. Maintains correct contact surface shape (“gap”). Improves the model accuracy in cases where slab/base separation occurs. Airplane library was updated to agree with COMFAA & FAARFIELD. New utility (NIKEPlot) allows interface with commercial post processing software (e.g. TecPlot).

    16. January 21, 2007 FEAFAA 1.10 Screen Shots

    17. January 21, 2007 FEAFAA 1.10 Plots

    18. January 21, 2007 PAVEAIR-Web-Based Airport PMS Background A joint initiative between the FAA and the National Association of State Aviation Officials (NASAO) to develop a system for sharing information to optimize the expenditure of funds. An Internet (Web) based system was deemed to be the best option considering the mature status of web-based applications. The FAA also has a need for system-wide dissemination and analysis of the performance of FAA sponsored pavement projects. A collection of airport pavement design and evaluation computer programs has also been developed and a dedicated PMS software application would tie these programs together.

    19. January 21, 2007 PAVEAIR Program Requirements Web-based application that provides a system for easy dissemination of information for airport pavement construction, maintenance, and management. Data for multiple airports available on a single server connected to the web Suitable for installation and use on: Single PC Private network Intranet or Internet. The FAA to host a server installed at the WJHTC to be a repository for civil airport projects funded under the Airport Improvement Program (AIP). Make the complete application available for free download: As a set of installation files. Full source code. Documentation for installation and operation.

    20. January 21, 2007 PAVEAIR

    21. January 21, 2007 PAVEAIR

    22. January 21, 2007 PAVEAIR Current Status– Subject to Testing and Reviews Prototype User Interface and master page template completed. Database structure defined and implemented. Micro PAVER import completed. Logon and profile modules completed. Inventory and Work modules completed. Now working on the PCI module. Tentative first deployment – January, 2010.

    23. January 21, 2007 PAVEAIR

    24. January 21, 2007 PAVEAIR Possible Implementations By the FAA for AIP projects. By FAA regions for small airports. By state DOT’s for GA airports (NASAO interest). By consulting and engineering services companies for private or customer only access. Will continue support and development after initial deployment; for example include functions to comply with existing FAA GIS Standards.

    25. January 21, 2007 Integration of FAA Software

    26. January 21, 2007 Flexible Pavement Full-Scale Tests Construction Cycle 5 Purpose Multiple-gear interaction on low-strength subgrade. Performance of different quality subbase materials. History Construction Completed: July 14, 2008 Started Loading: August 14, 2008 Increased wheel load from 50k to 58k: October 7, 2008 Cold Weather Shut Down: November 12, 2008 Passes to Date: 12,276

    27. January 21, 2007 CC5 Full-Scale Test Plan & Profile

    28. January 21, 2007 Construction Cycle 5

    29. January 21, 2007 Airfield Superpave Specifications Purpose Establish Ndesign for P- 401, Plant Mix Bituminous Pavement. Revise P-401 Specifications using the Superpave Gyratory Compactor. Run verification testing on a variety of well performing HMA mixes. In parallel with and complimentary to an FAA sponsored study being performed by ERDC at WES.

    30. January 21, 2007 Airfield Superpave Specifications Testing Plan Phase 1 Testing “Well Performing Mixes” 8 “well performing mixes” were identified Keeping same air voids as Marshal JMF Phase 2 (Future Tests) Evaluate effects of variations in binder content on mix performance Rut resistance Fatigue resistance Other performance related properties SRA International, Inc. Subcontractors Advanced Asphalt Technology Soiltek Roy D. McQueen & Associates

    31. January 21, 2007 Airfield Superpave Specifications Well performing Mixes

    32. January 21, 2007 Airfield Superpave Specifications

    33. January 21, 2007 Airfield Superpave Specifications

    34. January 21, 2007 ASR Full Scale Testing

    35. January 21, 2007 ASR Full Scale Testing Monitoring Plan Physical Expansion Dynamic Modulus of Elasticity (DME) Petrographic Examination every 6 months Sulfate Concentrations Mortar Bar Tests Visual Inspection

    36. January 21, 2007 Airport Technology Transfer Conference 2010

    37. January 21, 2007

    38. January 21, 2007

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