Lobster wrote:
I'm about to start laying a new small section of solid floor (approx 1m
x 1.7m) - first time I've ever done this. Think I've extracted from the
uk.d-i-y archives all I need to know, but could someone explain about
requirement for compacting hardcore prior to laying the concrete? I
have excavated about to about 15" below the final surface (it's earth
now), and was going to chuck in 6" hardcore now. Am I supposed to sort
of jump up and down on the hardcore a bit before I blind it with sand?!


Ideally you need a wacker to compact it. They are quite good fun to use.
Having said that, this is a very small section of floor, and I suspect a
good bit of jumping up and down might be enough.

The reason for doing this is that if you don't compact it sufficiently,
there's a chance of future settlement, which could cause your 1x1.7m
slab to move relative to its surroundings.


--
Grunff