Science Fair Project Encyclopedia
Base course
"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
10-26-2009 08:16:03
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details