Tuesday, November 20, 2007
Hardcore
Rubble rather than movies.
We visited the local quarry at Corseul today to order the hardcore (herrison) to replace the spoil dug out last week. My original plan was to use large gravel then a layer of sand on top to protect the waterproof membrane. The guy at the quarry suggested for under a dalle beton, concrete floor, using something called 0/30 primaire. 
I've seen it used under roads and it's a grey stone of various sizes with sand mixed in. Once a vibrating plate machine is run over it to compact everything down there is no need for the sand layer. The good news is that it is fairly inexpensive at about 8 euros per tonne (plus delivery!).
Calculating it out meant I needed 12 cubic meters, approx 18 tonnes, (quarry man said multiply by 1.5), BUT, a lorry load is only 15 tonnes ! So, just the one lorry, and maybe I'll chuck back in some of the rubble ripped out, or more concrete. My head hurts.
| 8:05:10 PM
Hardcore
