On 04/11/14 10:23, stuart noble wrote:

Yes, buy the cement and (fine) gravel separately. I've never used it for
posts, but it was on this group I first saw it mentioned. My guess would
be around 8 gravel: 1 cement by volume. A quick Google suggests just pea
gravel alone could work if rammed down sufficiently. Any farmers out there?

You'll want some sand too.

Something like a 1:3:6 of cement:sharp-sand:shingle
should do it - be fairly weak if it needs to be broken out in future...

That's a C7.5 mix ^