In article , "Lobster"
says...
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?!

You definitely need to compact it, and jumping on it will get you
nowhere fast. If you're fit you could try using a hand tamper
http://www.brandontoolhire.co.uk/Dir...?idproduct=254
but one of these would make it a quick and easy job
http://www.brandontoolhire.co.uk/Dir...?idproduct=253