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Showing 1 to 17 of 17 for “"Airfield pavements"”.
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Optimization of Long Range Major Rehabilitation of Airfield Pavements
The goal of this research has been to develop a methodology for managing pavement networks over prolonged analysis periods. Separate independent methods were devised for project and network level analysis, and the project level procedures were designed to provide inputs into the network level …
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Three-dimensional numerical analysis of reflective cracks in airfield pavements
… as the primary overlying material of concrete pavements during rehabilitation because of its inexpensive nature when compared to most Portland cement concrete (PCC) rehabilitation/reconstruction alternatives. In airfield pavements for example, a common technique is to place a HMA concrete …
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Response and Performance of Contingency Airfield Pavements Containing Stabilized Material Layers
… for the design and evaluation of Contingency Airfield Pavements (CAPs) containing stabilized material layers was validated. CAPs are inexpensive pavements built in peacetime and available immediately after an attack for limited aircraft operations. The mechanistic approach was validated by …
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Development of a Pavement Evaluation Method for Low-Volume Airfield Pavements
… operations to failure on marginal flexible pavements. Alternate Launch and Recovery Surfaces (ALRS) are being constructed for use only when the mission-essential runways are destroyed during an attack. Since ALRS pavements will only be used in contingency situations, an evaluation procedure …
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Application of Fracture Mechanics to Assess Reflective Cracking Potential in Airfield Pavements
… effects and interactions in rehabilitated airfield pavements. When temperature gradients were present in overlay systems, the critical overlay responses were raised dramatically. As the friction coefficients between slabs and CTB increased, the calculated J-value and mode I SIFs were …
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Hyperspectral Remote Sensing for UXO Detection and Damage Assessment on Airfield Pavements
If an airfield being operated by the U.S. Air Force is attacked, the current method for assessing its condition is a slow visual and manual inspection process, exposing personnel to dangerous conditions and delaying repair operations. Developing a fully autonomous remote assessment solution would …
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Influence of tire-pavement thermomechanical interaction on contact stresses and rolling resistance
… of flexible or asphalt-concrete-surfaced pavements is significantly influenced by both loading and environmental conditions. Heavy truck loads govern pavement responses and, thus, the eventual pavement damage. The anticipated increase in freight load and volume along with the prospect of …
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Impact of structure, material properties, temperature curling, and trafficking on load transfer efficiency
… trafficking on load transfer efficiency of rigid airfield pavements. The current FAA mechanistic design procedure for rigid pavements assumes constant stress-based load transfer efficiency (LTE (S)) of 25% at the joints. The design procedure assumes the material properties remain constant …
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Investigation of the performance of flexible pavement systems under moving loads using finite element analyses
… making the current design methods inadequate for airfield pavements. In addition, airport pavements experience significant wander. However, the effect of wander on airport pavement performance has not been evaluated. In previous studies, the stress interactions between each tire of a …
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Development and validation of a stress-based procedure for the design of military flexible pavements
… design procedure for military flexible airfield pavements. This proposed new procedure is based on the U.S. Army Corps of Engineers California Bearing Ratio (CBR) design methodology. The CBR design methodology has its roots on a very simple, but still reasonable theoretical approach, …
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Verification of the dissipated energy based fatigue model using field data
… can be limited to the top layer in perpetual pavements through the use of a very thick surface layer or a binder-rich intermediate layer. To achieve this goal, tensile strains at the bottom of the top hot-mix asphalt (HMA) layer must be limited to below a certain value known as the fatigue …
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Impact of Aggregate Gradation on Airfield (P-401) Asphalt Mixture
… lowest carbon footprint mixtures will safeguard airfield pavements into the future and were goals of this research.This research utilized three material sources, one each from Arizona, Nevada and Washington to develop mix designs using the Baily Method inside the P-401 gradation specification …
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Development of a pavement life cycle assessment tool for airfield rehabilitation strategies
… are developed for highway infrastructure and pavements with a limited number of studies developed for airports and even fewer for the airport pavement infrastructure. A pavement LCA tool called LCA-AIR 1.0 is introduced to fill the necessary gap in quantifying sustainability strategies for …
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Comparison of Marshall Compactor and Superpave Gyratory Compactor for Mix Design and Control of Airport Asphalt Mixtures
… 50 blows or gyrations for asphalt mixtures for airfield pavements serving aircraft of 60,000 pounds or less, and 75 blows or gyrations for mixtures to support aircraft weighing more than 60,000 pounds, respectively. The Marshall hammer compaction was used for many decades prior to the …
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Influence of moving load, structure, temperature gradient, and wheel configuration on load transfer efficiency
… FAARFIELD, for the design of rigid airport pavements. The FAARFIELD (FAA Rigid and Flexible Iterative Elastic Layer Design) procedure is based on layered elastic and three-dimensional finite element-based structural analysis developed to calculate design thicknesses for airfield pavements. …
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A Life Cycle Assessment of Three Department of Defense Airfield Paving Projects
… (LCA) to analyze one concrete and two asphalt airfield paving projects from three military installations, quantifying associated Global Warming Potential (GWP) contributions from materials, transportation, and construction (life cycle stages A1 through A5). LCA results were calculated using the …
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Performance of Silty Sands and their Use in Flexible Airfield Pavement Design
… depending on the fines content. The Cambridge Airfield Pavement Tester (APT) was designed and constructed to measure permanent subgrade deformation resulting from various surface loads. The number of input variables required to design flexible pavements is one of the most frequently stated …