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Airport Pavement Design

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Pavement Composition

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Comprises layers of materials with varying strengths - asphalt or concrete surfaces, base, subbase, and subgrade. It's crucial for withstanding loads from aircraft and weather conditions.

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PCN (Pavement Classification Number)

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A standardized number to categorize the strength and load carrying capacity of an airport pavement. Crucial for aircraft operators to determine if a pavement can handle their aircraft.

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Joint Design for Concrete Pavements

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Design of joints in concrete pavements to control cracking and facilitate expansion/contraction. It influences the performance and durability of rigid pavements.

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Overlay Design

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Designing additional pavement layers over existing ones, usually to strengthen the structure or improve operational characteristics. Must be properly bonded to the existing pavement for effectiveness.

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Asphalt Mixture Design for Pavements

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The composition and performance grading of asphalt tailored to withstand specific airport conditions, traffic, and environmental factors to ensure durability.

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Flexible Pavement

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Pavement structure that can bend under loads without cracking; uses bituminous materials and a mix of aggregates. It distributes loads over a wide area of the subgrade.

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Pavement Marking and Signing

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Includes painted lines, symbols and signs that provide visual guidance to pilots. It's essential for efficient, safe navigation and operation within the airport.

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Drainage Design

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A system ensuring water is effectively removed from pavement surfaces and structure. Prevents standing water and water damage, which affects safety and longevity.

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Stress Absorbing Membrane Interlayer (SAMI)

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A layer used in pavement resurfacing to reduce reflective cracking by absorbing stresses. It extends the life of overlays on pavements.

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Ground Service Equipment (GSE) Considerations

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Design considerations for the pavement to handle the weight and movement patterns of GSE, supporting airport logistics without causing pavement damage.

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Surface Texture

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The micro and macro texture of pavement influences friction and drainage. Important for preventing skidding and ensuring aircraft safety during landing and takeoff.

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Taxiway Pavement Design

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Designed for aircraft movement between runway and apron or terminal. Must endure repetitive loads and have surface characteristics suitable for low-speed aircraft movement.

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Apron Pavement Design

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Concerns the area where aircraft park, load/unload, refuel. It must support heavy loads and fuel spillage with material choices and thicknesses suited for static and dynamic loads.

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Emergency Pavement Repairs

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Rapid repair methods for unexpected damages to preserve operational continuity and ensure safety. Techniques include rapid set concrete and high early strength asphalt.

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Pavement Life Cycle Cost Analysis

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An economic analysis to evaluate the total cost of pavement over its expected life. Factors include initial cost, maintenance, and salvage value.

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Pavement Grooving

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Adding grooves to the pavement surface for improved water drainage and reduced hydroplaning risk, enhancing aircraft braking capability in wet conditions.

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Pavement Thickness Design

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Determined based on aircraft load, repetition, subgrade strength and environmental factors to prevent premature failure. Employs the Westergaard's and layered elastic theories.

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Rigid Pavement

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Composed of slabs of portland cement concrete that distributes the load over a larger area of the subgrade. It has longer life and lower maintenance but higher initial costs.

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Load Transfer Devices

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Used in concrete pavements to transfer load across joints or cracks, maintaining smoothness and reducing stress. Dowel bars are a common device used.

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Airport Pavement Maintenance

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Regular inspections and repairs that ensure the longevity and safety of the airport pavement. Includes crack sealing, resurfacing, and reconstruction efforts.

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Subgrade Evaluation

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The process of assessing the load-bearing capacity and stability of the soil beneath pavement, which affects the overall design and lifespan of the airport pavement.

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Frost Protection

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Designing pavement to prevent frost heave and degradation due to freezing and thawing cycles. Often includes insulating materials or a non-frost susceptible base layer.

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Runway Safety Area (RSA) Pavement

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The surface surrounding the runway prepared for reducing the risk of damage in case an aircraft overruns or veers off the runway. Must have suitable strength and grading.

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Rubber Removal

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The process of removing rubber deposits from aircraft tires on the runway, essential for maintaining friction characteristics of the pavement surface.

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Non-Destructive Testing (NDT) for Pavements

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Testing methods that assess pavement condition without causing damage, such as Ground Penetrating Radar (GPR) or Falling Weight Deflectometer (FWD). Enables maintenance planning without interrupting airport operations.

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