pavement subgrade

The upper part of the soil, natural or constructed, that supports the load transmitted by the runway pavement structure. See pavement structure.

Aviation dictionary. 2014.

Look at other dictionaries:

  • pavement classification number — A number expressing the bearing strength of a pavement for unrestricted operation (ICAO). PCNs are calculated in terms of a standard single wheel load. The values of PCNs for runways and other operating areas are published in relevant aerodrome… …   Aviation dictionary

  • Pavement Classification Number — The Pavement Classification Number (PCN) is an International Civil Aviation Organization standard used in combination with the Aircraft Classification Number (ACN) to indicate the strength of a runway, taxiway or airport ramp (or apron). This… …   Wikipedia

  • Subgrade — In highway engineering, subgrade is the native material underneath a constructed pavement. It is also called formation level. Explanation Subgrades are commonly compacted before the construction of a pavement, and are sometimes stabilized by the… …   Wikipedia

  • subgrade — ˈsəb+ˌ noun Etymology: sub + grade 1. : a subordinate level in a scale (as of rank or quality) subgrade is used in some classifications at a supraphylar level 2. : a layer (as a stratum or surface) immediately beneath some principal layer;… …   Useful english dictionary

  • pavement structure — The combination of sub base, base course, and surface course placed on a subgrade to support the traffic load and distribute it to the sub grade (ICAO). Also called pavement …   Aviation dictionary

  • subgrade — /sub grayd /, Civ. Engin., Building Trades. n. 1. the prepared earth surface on which a pavement or the ballast of a railroad track is placed or upon which the foundation of a structure is built. adj. 2. beneath the finished ground level of a… …   Universalium

  • Subbase (pavement) — In highway engineering, subbase is the layer of aggregate material laid on the subgrade, on which the base course layer is located. It may be omitted when there will be only foot traffic on the pavement, but it is necessary for surfaces used by… …   Wikipedia

  • flexible pavement — A pavement structure that maintains intimate contact with and distributes loads to the subgrade and depends on aggregate interlock, particle friction, and cohesion for stability (ICAO). The term pavement refers to operating surfaces, such as… …   Aviation dictionary

  • Cold Regions Research and Engineering Laboratory — Established 1 February 1961 (1 February 1961) Research Type …   Wikipedia

  • Road surface — A road in the process of being resurfaced Road surface (British English) or pavement (American English) is the durable surface material laid down on an area intended to sustain vehicular or foot traffic, such as a road or walkway. In the past… …   Wikipedia

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