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Showing 1 to 20 of 56 for “"Airfield"”.
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Airfield pavement maintenance.
Massachusetts Institute of Technology, Dept. of Civil Engineering. Thesis. 1971. M.S.
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Electro-optical sensor evaluation of airfield pavement
… (MD5) Electro-Optical Sensor Evaluation of Airfield Pavement by Stephanie Graves.docx: 54846006 bytes, checksum: 2444dd5964ace5f378ff780026a0ed96 (MD5) license.txt: 4066 bytes, checksum: 2dbaa1257d9f9f1432f0431612f88c77 (MD5)
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Integrated simulation and optimization in airfield networks
… to predict landing aircraft operations in airfield networks considering gate location and taxiway network information. By using the integrated simulation results, an improved dynamic programming model is established to solve the runway exit location problem. The simulation model uses …
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Automated Method for Airfield Pavement Condition Index Determination
… of inspection, current practices for assessing airfield pavement serviceability remain predominately manual. Though roadway inspection has benefited from automation with the introduction of various types of sensor arrays attached to automobiles, the characteristics of airfields and their …
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Mechanistic Analysis of in-Service Airfield Concrete Pavement Responses
The effect of temperature curling on pavement responses was analyzed. A theoretical analysis of the effect of pavement temperature distribution on total and load-induced responses is presented and complemented with Analysis of Variance (ANOVA). The analysis of in-situ interface condition was based …
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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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A knowledge base for rehabilitation of airfield concrete pavements
Airfield pavement knowledge captured in this research showed that knowledge-based techniques can be used to quickly select and design rehabilitation alternatives for a runway, taxiway or an apron. The AIRfield PAvement Consultant System (AIRPACS) uses the knowledge of planners, constructors, …
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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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Three-dimensional numerical analysis of reflective cracks in airfield pavements
… rehabilitation/reconstruction alternatives. In airfield pavements for example, a common technique is to place a HMA concrete overlay on top of an existing deteriorated PCC, since the initial cost is low and the placement process is fast. This restores smoothness, structure and water-proofing …
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A Constructivist Grounded Theory Study of Airfield Lighting Maintenance Management Strategy
… are rare for highly specialized assets like airfield lighting systems and often gain most of their experience working at one airport.</p> <p>This research investigated the maintenance strategies most often used for airfield lighting, examined which criteria affected strategy choices, and …
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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
The U.S. Air Force has a need to predict the number of aircraft 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 …
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Evaluation of Precast Portland Cement Concrete Panels for Airfield Pavement Repairs
… limited information regarding performance of airfield applications is available. Following a review of the available technologies, an existing panel prototype was redesigned to allow for both single- and multiple-panel repairs. A series of various sized repairs were conducted in a full-scale …
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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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Development of mid-infrared light emitting diodes to replace incandescent airfield lighting
This work studied the replacement of incandescent airfield lighting systems withlight emitting diodes. The focus was on the replacement of the infrared component of the incandescent spectra. A series of LEDs with a variety of nanostructures in different material systems were produced and tested to …
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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 …
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Development of a pavement life cycle assessment tool for airfield rehabilitation strategies
… gap in quantifying sustainability strategies for airfield pavements. LCA-AIR incorporates the material production, construction/maintenance and rehabilitation, and use phases in the analysis. Standard indicators from TRACI are used to quantify these impacts based on two functional units (square …
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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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Epoxy-Based, Rapid Setting Polymer Concretes for use in Military Airfield Repairs
When damaged, military airfields must be repaired quickly so that flying operations can resume. Due to their rapid-setting and high-strength properties, epoxy-based polymer concretes (PC) may provide a good alternative to the portland cement concrete (PCC) rapid repair mixes currently used by the …
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