Civil Engineering Dictionary Terms : O

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Sr.TermDefinition
1OffsetA horizontal distance measured at right angles to a survey line to locate a point off an edge line.
2Optimum Moisture ContentThat moisture content of a soil at which a precise amount of compaction produces the highest dry density. It is particularly important to achieve this in soil stabilization before the road is completed. It is the percentage of moisture at which the greatest density of a particular soil can be obtained through compaction by a specified method.
3OverburdenMaterial of inferior quality which overlies material of desired quality and which must be removed to obtain the desired material quality.
4OverlayOne or more courses of asphaltic concrete layers placed over existing worn or cracked pavement.

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