Transcription of AASHTO Method for Flexible Pavement Design
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AASHTO Method for Flexible Pavement Design
GRID-DE-6 1999 TENAX Corporation4800 East Monument StreetBaltimore, Maryland 21205tel: (410) 522 - 7000fax: (410) 522 - 7015 TENAXT echnical Reference GRID-DE-6 GEOGRID REINFORCEMENT OF Flexible PAVEMENTS:A PRACTICAL PERSPECTIVEGRID-DE-6 Geogrid Reinforcement of Flexible Pavements: A Practical PerspectiveBy Aigen Zhao and Paul T. FoxworthyRecent efforts by the AASHTO Subcommittee on Materials, Technical Section 4E, to develop ageogrid/geotextile specification for Pavement reinforcement have initiated very positivediscussions. The Geosynthetic Materials Association has participated in the discussion and maderecommendations to AASHTO with the presentation of a draft White Paper addressinginstallation survivability and specifications. The overwhelming comments back from thereviewers of the White Paper clearly show the need to 1) demonstrate the performance andcost benefits of geogrid reinforcement, and 2) develop a Design procedure incorporating geogridwith value-added benefits, in addition to the installation survivability aspects already reinforcement has been used in the Design and construction of pavements for over adecade, yet there exists no Design Method incorporating geogrid mechanical properties as directdesign parameters.
identified for nondestructive testing. Ground penetrating radar (GPR) and falling weight deflectometer (FWD) tests were conducted on these existing geogrid reinforced paved roads. The FWD load plate used for this project was 285 mm in diameter, and two tests targeted to produce
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