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Showing 1 to 10 of 10 for “"NAPTF"”.
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Subgrade Soil Evaluation for the Design of Airport Flexible Pavements
… the National Airport Pavement Test Facilities (NAPTF) cohesive subgrade soils. NAPTF full-scale pavement data will be used to validate the concepts and procedures.
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Permanent Deformation Behavior of Airport Flexible Pavement Base and Subbase Courses
… (FAA's) National Airport Pavement Test Facility (NAPTF) was completed, significant rutting was found to take place in the flexible pavement test sections in the granular base and subbase layers, designated as NAPTF P209/P154 base and subbase according to FAA's construction specifications. To …
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Performance Analysis of Airport Flexible Pavements Subjected to New Generation Aircraft
… to characterize the structural degradation of NAPTF test sections. The ILLI-PAVE structural model was validated for NAPTF by comparing measured (dynamic sensors and HWD) and computed pavement structural responses. The damage potential for B777 trafficking and B747 trafficking do not differ …
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Impact of structure, material properties, temperature curling, and trafficking on load transfer efficiency
… the National Airport Pavement Test Facility (NAPTF) operated by the Federal Aviation Administration (FAA). LTE (S) is determined through strain measurements from gages embedded near pavement joints throughout trafficking of both Construction Cycle 2 and 6 (CC2 and CC6) at the NAPTF. Heavy …
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Verification of the dissipated energy based fatigue model using field data
… FAA's National Airport Pavement Test Facility (NAPTF) were analyzed to determine the loading pass for each section that the HMA layer modulus was reduced by 50%. NAPTF tensile strain data was then used to determine the strain at the critical pass for each pavement section by averaging the two or …
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Investigation of compaction characteristics of subbase material using the superpave gyratory compactor
… at the National Airport Pavement Test Facility (NAPTF). During the past construction cycles at the NAPTF, it has been found that the flexible pavements failed due to excessive compaction of the subbase material. To better study this phenomena in the laboratory, SGC tests were done at various …
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Study of load transfer efficiency of airfield rigid pavement joints based on stresses and deflections
… at National Airport Pavement Test Facility (NAPTF) was used in this study. Available strain gage records obtained during the slow rolling tests were analyzed to obtain LTE (S) under moving aircraft gear loading. Deflection data from FWD was analyzed to obtain LTE (6) of the test item joints. …
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New Field Testing Procedure For Measuring Residual Stress in Plain Concrete Pavements and Structures
… (FAA’s) National Airport Pavement Test Facility (NAPTF) investigated the strain relaxation of cantilevered concrete beams when a blind-depth hole using core drilling is made in the vicinity of an affixed strain gage. Initial findings indicated that the testing procedure partially quantified the …
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Influence of moving load, structure, temperature gradient, and wheel configuration on load transfer efficiency
… (FAA) National Airport Pavement Test Facility (NAPTF) is modeled using 3D finite element software, ABAQUS. The model is calibrated by determining pavement damping parameters and joint stiffness values using heavy weight deflectometer (HWD) data and the strain profiles captured from the dynamic …
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Analyses and prediction of granular layer rutting trends in airport pavements due to heavy aircraft wheel loading and wander patterns
… air traffic using the MDD data from the NAPTF CC5 test sections. Using the multi-depth deflectometer (MDD) database, a method of using only two critical wander locations was developed to establish a transverse profile for each pass and then calculate the transverse profile created by …