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Airport Pavement Design
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Pavement Composition
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.
PCN (Pavement Classification Number)
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.
Joint Design for Concrete Pavements
Design of joints in concrete pavements to control cracking and facilitate expansion/contraction. It influences the performance and durability of rigid pavements.
Overlay Design
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.
Asphalt Mixture Design for Pavements
The composition and performance grading of asphalt tailored to withstand specific airport conditions, traffic, and environmental factors to ensure durability.
Flexible Pavement
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.
Pavement Marking and Signing
Includes painted lines, symbols and signs that provide visual guidance to pilots. It's essential for efficient, safe navigation and operation within the airport.
Drainage Design
A system ensuring water is effectively removed from pavement surfaces and structure. Prevents standing water and water damage, which affects safety and longevity.
Stress Absorbing Membrane Interlayer (SAMI)
A layer used in pavement resurfacing to reduce reflective cracking by absorbing stresses. It extends the life of overlays on pavements.
Ground Service Equipment (GSE) Considerations
Design considerations for the pavement to handle the weight and movement patterns of GSE, supporting airport logistics without causing pavement damage.
Surface Texture
The micro and macro texture of pavement influences friction and drainage. Important for preventing skidding and ensuring aircraft safety during landing and takeoff.
Taxiway Pavement Design
Designed for aircraft movement between runway and apron or terminal. Must endure repetitive loads and have surface characteristics suitable for low-speed aircraft movement.
Apron Pavement Design
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.
Emergency Pavement Repairs
Rapid repair methods for unexpected damages to preserve operational continuity and ensure safety. Techniques include rapid set concrete and high early strength asphalt.
Pavement Life Cycle Cost Analysis
An economic analysis to evaluate the total cost of pavement over its expected life. Factors include initial cost, maintenance, and salvage value.
Pavement Grooving
Adding grooves to the pavement surface for improved water drainage and reduced hydroplaning risk, enhancing aircraft braking capability in wet conditions.
Pavement Thickness Design
Determined based on aircraft load, repetition, subgrade strength and environmental factors to prevent premature failure. Employs the Westergaard's and layered elastic theories.
Rigid Pavement
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.
Load Transfer Devices
Used in concrete pavements to transfer load across joints or cracks, maintaining smoothness and reducing stress. Dowel bars are a common device used.
Airport Pavement Maintenance
Regular inspections and repairs that ensure the longevity and safety of the airport pavement. Includes crack sealing, resurfacing, and reconstruction efforts.
Subgrade Evaluation
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.
Frost Protection
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.
Runway Safety Area (RSA) Pavement
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.
Rubber Removal
The process of removing rubber deposits from aircraft tires on the runway, essential for maintaining friction characteristics of the pavement surface.
Non-Destructive Testing (NDT) for Pavements
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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