"Dave Liquorice" wrote:

On Mon, 10 Nov 2008 17:04:23 +0000, David Hansen wrote:

3. How do I work out how much concrete to mix? considering that bags of
cement and ballast are sold by weight and holes in the ground are
measured by volume?

Close enough is 1 cubic metre = 1 tonne.


Don't be ridiculous.

A cubic metre of well compacted concrete weighs 2.4 tonnes. With poor
compaction such as you get when pouring concrete into a hole, you
should still expect to get around 2.0 tonnes to the cubic metre.

Also, take more care with your attribution, because the words you
quoted were not Mr Hansen's. So stand by for some of the usual mock
outrage from Mr. H. ;-)