dfkrug
Super Member
- Joined
- Feb 3, 2004
- Messages
- 7,619
- Location
- Santa Cruz Mtns, CA
- Tractor
- 05 Kioti CK30HST w/ Prairie Dog backhoe, XN08 mini-X
In CA, civil engineers and the county or city will specify so-called
Class 2 base rock, which is a mixture of gravel (3/4 minus, I believe),
sand, and a small amount of clay binder. It then has to be compacted,
usually to 95%, and then tested. Quarries and engineers usually
just call this stuff "base rock", and it is used under asphalt (A.C.) or
oil-and-screen pavements, or to embed culverts. It is not intended
as the wear surface. The cheapest pavement here is oil-and-screen,
which can work quite well on a good base with good drainage. This is
the kind of pavement they laid in Cool Hand Luke, if you saw that movie.
BTW, my road I paved with asphalt when it was $50/ton. It is about
$350/ton now, making Portland-based concrete less expensive for
materials now.
Class 2 base rock, which is a mixture of gravel (3/4 minus, I believe),
sand, and a small amount of clay binder. It then has to be compacted,
usually to 95%, and then tested. Quarries and engineers usually
just call this stuff "base rock", and it is used under asphalt (A.C.) or
oil-and-screen pavements, or to embed culverts. It is not intended
as the wear surface. The cheapest pavement here is oil-and-screen,
which can work quite well on a good base with good drainage. This is
the kind of pavement they laid in Cool Hand Luke, if you saw that movie.
BTW, my road I paved with asphalt when it was $50/ton. It is about
$350/ton now, making Portland-based concrete less expensive for
materials now.
