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Posted: Fri May 19, 2017 10:00 am
by Hairs
Brets/Hansons have been and tipped the first layer of my sub-base 4/20 aggregate. It didn't seem to be mixed at all small stones on top and bigger stones underneath, Vice-versa when up ended. I did my best to mix the stones together with a spade and wheel barrow :p 
My question would be what weight compacting equipment should I be using to compact one 150mm layer and 100mm lay of crushed 4/20 limestone..?
Posted: Fri May 19, 2017 7:18 pm
by seanandruby
Posted: Fri May 19, 2017 7:30 pm
by Hairs
Ok so I need a roller about 1.5 tons and about 16 times around :O bloody hell that will be some roller ffs
Posted: Fri May 19, 2017 9:03 pm
by seanandruby
Do it in 75ml layers with a heavy duty plate compactor. Is your sub soil good?
Posted: Sat May 20, 2017 6:52 am
by Hairs
seanandruby wrote:Do it in 75ml layers with a heavy duty plate compactor. Is your sub soil good?
The first layer is down already which is approximately 150mm. The sub soil is clay, you ask if that's good, probably not the best.
The only basis I have to go on is next door slapped a 100m thick concrete strip in there front garden and parked a car on it for years. It has cracked but no sinking.
Hairs
Posted: Sat May 20, 2017 7:16 am
by seanandruby
It pays to ask advice before you start.
Roller it is then ???
Posted: Sat May 20, 2017 2:49 pm
by Tony McC
That Type 3 aggregate (4/20) does not compact anywhere near as much as you might expect. The lack of fines means it isn't "fluffed up" like a Type 1 or Type 2 aggregate, so needs less in the way of compaction.
Although you could use a roller, if you can get a 75kg+ plate compactor, and whack it in layers of 100mm at a time, that will do the job just as well as a half-tonne roller.
Posted: Tue May 23, 2017 7:39 pm
by Thefox
if you could be bothered you could remove half or two 3rds and place on a tarp, i would prefer to compact 50mm at a time which a good sized plate would be fine. i also like to dampen not soak the material first first.
Posted: Wed May 24, 2017 4:56 am
by Dave_L
Bomag 18/45 plate or similar will be just fine, 85kg in weight.
Posted: Fri May 26, 2017 4:58 pm
by Hairs
Thefox wrote:if you could be bothered you could remove half or two 3rds and place on a tarp, i would prefer to compact 50mm at a time which a good sized plate would be fine. i also like to dampen not soak the material first first.
Whacker plate coming Tuesday so will post some pictures of some whacking then.
Does wetting the aggregate help.? I have the first layer covered over to protect from debris, I was just going to wack over that.
Posted: Fri May 26, 2017 6:27 pm
by digerjones
Yes damping it definitely helps. This weather you need plenty
Posted: Fri May 26, 2017 8:36 pm
by Hairs
digerjones wrote:Yes damping it definitely helps. This weather you need plenty
Ok Cool, Thanks for the advise, I give it a good watering with a watercan before I start the wacking 