Base course

From Biocrawler, the free encyclopedia.

"Base course" refers to the sub-base layer of an asphalt roadway. Generally consisting of larger grade aggregate, spread and compacted to provide a stable base for further layers of aggregates or asphalt pavement.

Aggregate Base is typically composed of crushed rock comprised of material capapble of passing through a 3/4 inch rock screen. The component particles will vary in size from 3/4 inch down to dust. The mateiral can be made of virgin (newly mined) rock or of recycled asphalt and concrete.

Base is used as a base course in roadways, as a base course for cement pads and foundations, and as backfill material for underground pipelines and other underground utilities.

See Also

• Aggregate Base
• Civil Engineering
• Engineering Vehicles
• Mining

Wikipedia (http://en.wikipedia.org/wiki/Main_Page) Base_course (http://en.wikipedia.org/wiki/Base_course) version history (http://en.wikipedia.org/w/index.php?title=Base_course&action=history) GNU Free Documentation Lizenz (http://en.wikipedia.org/wiki/Wikipedia:Text_of_the_GNU_Free_Documentation_License) CC-by-sa (http://creativecommons.org/licenses/by-sa/2.5/)

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