Civil Engineering Dictionary Terms : D

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Sr.TermDefinition
1DadoConcrete barrier on the sides of bridge approach slab; the part of pedestal between cap and base.
2DatumAny elevation taken as a reference point for leveling.
3Deck(1) A flat roof, a quay, jetty or bridge floor, generally a floor form with no roof over upon which concrete for a slab is placed. (2) Formwork for a level surfaces.
4Deformed BarA reinforcing bar with ridges to increase bonding between the reinforcing bar and concrete.
5Density Index (Relative Density):is a measure of the tendency or ability to compact soil during loading. The density index is equal to 1 for a very dense soil; it is equal to 0 for a very loose soil.
6DetourA temporary route for traffic around a closed portion of a road.
7DeviationDifference between the value and the average of a set.
8Diaphragm(1) A stiffening plate in a bridge between the main girders in a bridge or a stiffening web across a hollow building block. (2) Legamentous wall separating two cavities.
9DilutionReducing a concentration of soluble material by adding pure water.
10DistillationSalt removal process from brackish or sea water by boiling and condensation.
11DitchLong narrow excavation for drainage, irrigation or burying underground pipelines.
12Divided HighwayA highway with separated traveled ways for traffic, generally in opposite directions.
13DredgeTo dig or excavate under water.
14DuctA protective tube or a brick or concrete trench or corridor along which pipes or cables pass through the ground.
15DuctilityThe ability of a metal to undergo cold plastic deformation without breaking, particularly by pulling in cold drawing.
16DurabiltyThe ability of materials to resist weathering action, chemical attack, abrasion or other conditions of service.
17Dyke(1) A mound of earth along a river or channel bank to retain floodwater. (2) large ditch. (3) A tabular-shaped igneous intrusion.

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