Aggregate base is typically composed of crushed rock capable of passing through a 3⁄4 in (19.05 mm) rock screen. The component particles will vary in size from 3/4 inch down to dust. The material 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.
"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 course is often referred to as ABC.
Famous quotes containing the words aggregate and/or base:
“a fortress against ideas and against the
Shuddering insidious shock of the theory-vendors
The little sardine men crammed in a monster toy
Who tilt their aggregate beast against our crumbling Troy.”
—Louis MacNeice (1907–1963)
“Thou treacherous, base deserter of my flame,
False to my passion, fatal to my fame,
Through what mistaken magic dost thou prove
So true to lewdness, so untrue to love?”
—John Wilmot, Earl Of Rochester (1647–1680)