On 16 Mar, 14:45, Owen Duffy wrote:
John Ferrell wrote :

The other choice is to mix it myself.

What is the strength of "mix it yourself" concrete? You might need the five
yards!

Down here, "mix it yourself" costs more than readymix (provided you are
near a readymix plant), and if you "measure" the mix with a shovel, it will
be rated lower in strength. If you mix it in a barrow, even worse.

Owen

And what would it fail by if mix was rated lower in strength,
presumably it would have steel reinforcement? I would have thought the
tower itself would be the weakest link.
Art