subbase layer

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• 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

• Subbase — In highway engineering, subbase is a layer between subgrade and the base course.In topology, a subbase (or subbasis) for a topological space X with topology T is a subcollection B of T which generates T , in the sense that T is the smallest… …   Wikipedia

• Soil cement — is a construction material , a mix of pulverized natural soil with small amount of portland cement and water, usually processed in a tumble, compacted to high density. Hard, semi rigid durable material is formed by hydration of the cement… …   Wikipedia

• Asphalt concrete — Asphalt concrete. As shown in this cross section, many older roadways are …   Wikipedia

• Crocodile cracking — Crocodile cracking, also called fatigue cracking or alligator cracking, is a common type of distress in asphalt pavement. It is usually studied under the transportation section of civil engineering. Crocodile cracking is characterized by… …   Wikipedia

• Road transport — (British English) or road transportation (American English) is transport on roads of passengers or goods.A hybrid of road transport and ship transport is the historic horse drawn boat.HistoryThe first forms of road transport were horses, oxen or… …   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

• roads and highways — ▪ transportation Introduction       traveled way on which people, animals, or wheeled vehicles move. In modern usage the term road describes a rural, lesser traveled way, while the word street denotes an urban roadway. Highway refers to a major… …   Universalium

• 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

• Falling weight deflectometer — A falling weight deflectometer, FWD, is a testing device used by civil engineers to evaluate the physical properties of pavement. FWD data is primary used to estimate pavement structural capacity for 1) overlay design and 2) to determine if a… …   Wikipedia

• Admiralty Islands campaign — Admiralty Islands Part of World War II, Pacific War …   Wikipedia