Presentation on theme: "PERMANENT DEFORMATION BEHAVIOR OF THE GRANULAR LAYERS TESTED AT THE FAA’s NATIONAL AIRPORT PAVEMENT TEST FACILITY NAVNEET GARG, Ph.D. Senior Research Engineer,"— Presentation transcript:
PERMANENT DEFORMATION BEHAVIOR OF THE GRANULAR LAYERS TESTED AT THE FAA’s NATIONAL AIRPORT PAVEMENT TEST FACILITY NAVNEET GARG, Ph.D. Senior Research Engineer, Galaxy Scientific Corp., EHT, NJ 82 nd Annual Meeting of the Transportation Research Board Modeling of Granular Bases for Flexible Pavements Session-556 January 14, 2003, Washington DC
SUMMARY Of the 6 flexible pavement sections tested- LFS & LFC –Rutting/shoving in P-401 layer, rutting in P-209 & P-154 layer. rutting in P-209 & P-154 layer. MFS & MFC –Rutting in subgrade, P-209 & P-154 layer. HFS & HFC – No signs of failure, traffic tests suspended.
SUMMARY The total accumulated permanent deformation in the pavement structure over a complete wander pattern (66 passes) is a small fraction of the total range of the unrecovered deformation occurring during the wander cycle. Recovered and unrecovered displacements due to traffic loading increased significantly as the pavement was trafficked to failure.