DIYbanter - View Single Post - how to make sure that driveway does not crack

George E. Cawthon

pe wrote:
On Sun, 7 Jan 2007 13:10:56 -0600, "Steve Barker"
wrote:

Rebar, lots and lots of rebar. And concrete 6" thick. Did i mention rebar?

Except lots of rebar can also mean lots of spalling. Rust requires more room than
steel and can explode the concrete.

I think you are joking. If not, the rebar should
be in the lower third of layer. How do you
explain the lack of spalling on exposed concrete
pillars, e.g., bridge supports, basement supports,
etc. since they have lots of rebar.