Calling all groundworks

[wee_gus]

Evening all,

need some help with new workshop.
I want to concrete the outside of the workshop so it’s tidier.
It’s 16mtr length x 11mtr width.

at the moment water runs down towards the workshop doors and the runs to the left where you can see another unit.

what’s the best plans for this?
I was going to dig down 200mm
Remove all slop, 50mm hardcore and ramp down, aqua drain running full length of workshop with a fall going to the left as per existing drain. Then 4 bays of concrete

 

[doobin]

More hardcore, thicker concrete and some reinforcement.
If you don’t own the yard it’s a hell of an investment, I’d look at planings and drainage.

 

[Giles]

You want at least 150mm of good compacted mot/crusher run. 50mm Sand And 1200 visqueen then 200mm slab c35 with a layer of a393 50mm from the bottom in an ideal world

if reality if the ground is hard packed 50/150 meshed concrete will work until 32 tons find the weak spot etc, if you dowel between bays and lay some proper concrete should be fine.

6 inch slab we laid recently on 100mm mot on bed rock, ran the 40 ton voli on it 2 days later to pour the next phase

 

[Left hooker]

Aqua drain do you mean aco or concrete half channel ?

 

[DaveDCB]

i ran a length of half concrete channels in my yard straight into a huge catch pit, ideal as they don’t clog up like a Aco does. I was very short on fall, should of had more away from the shed and into the pit, but the yard and shed keeps dry so I shouldn’t be so fussy!

 

[Furniss]

i ran a length of half concrete channels in my yard straight into a huge catch pit, ideal as they don’t clog up like a Aco does. I was very short on fall, should of had more away from the shed and into the pit, but the yard and shed keeps dry so I shouldn’t be so fussy!

Ive been meaning to get a wash off bay/front of my shed concreted, every year when its a shi*t hole out front from washing off machines ( think I even had a thread on here about it and never got it done yet) concrete half channels might be a better idea rather than aco's ........ the catch pit you built, did you size it to clean it out with a mini digger ?

 

[T whiting]

It depends what the existing yard is you want 200mm of concrete with mesh and 150 of type 1 underneath really but it doesn't have to be fresh if your still in existing hardcore.

I'd pour one bay out the front and saw cut it the next morning for ease of pouring it I'd also take dave's advice and lay open channels and a catch pit or make the slab fall to a catch pit rather than acos unless your going to fit d400 ones as forklifts will just smash them.

If it's just to tidy it up and your not going to be dropping steel on it and running steel tracks on it have you considered tarmac?

 

[T whiting]

Ive been meaning to get a wash off bay/front of my shed concreted, every year when its a shi*t hole out front from washing off machines ( think I even had a thread on here about it and never got it done yet) concrete half channels might be a better idea rather than aco's ........ the catch pit you built, did you size it to clean it out with a mini digger ?

For a wash bay I would but it wants to be quite big for a wash bay the one at a local plant hire yard is 4m x 6m x 1m deep and only takes about 6 months to fill I wouldn't bother with one too big for a yard though just a 900 cube so you can dig it out or a gully pot if it's going to be a clean yard

 

[Smiffy]

Ive been meaning to get a wash off bay/front of my shed concreted, every year when its a shi*t hole out front from washing off machines ( think I even had a thread on here about it and never got it done yet) concrete half channels might be a better idea rather than aco's ........ the catch pit you built, did you size it to clean it out with a mini digger ?

I couldn't tell you why but I have worked on a few that have been engineer designed and it seems to be best practice to use a speed bump around the edge rather than dished channels
Also if the council turn up and the water is running into a ditch or storm water drain without filtration they will not be happy
Should have an oil catch tank and some sort of filter or bio bed

Last thing is no one has mentioned terram under the crush it really helps if on shitty ground to begin with

 

[Brendan]

You could use crush then blind off with type 1/plannings. Personally wouldn't bother with sand blinding, dpm is only really to keep the water in the concrete as it cures rather than an actual dpm but still use one
Minimum of 200mm thick concrete, single layer of mesh will help.
You can get some expansion joint shutters, no idea on cost but look handy as they are you edge restraint for the concrete bays and you just leave them in, they also have holes for rebar between bays.
On the flip side I've also seen yards poured in 40m2 sections at 200mm deep (full 8m3 wagon loads) with no membrane or insertable expansion joints with single layer of thin mesh with zero issues 5+ years later

 

[Giles]

You could use crush then blind off with type 1/plannings. Personally wouldn't bother with sand blinding, dpm is only really to keep the water in the concrete as it cures rather than an actual dpm but still use one
Minimum of 200mm thick concrete, single layer of mesh will help.
You can get some expansion joint shutters, no idea on cost but look handy as they are you edge restraint for the concrete bays and you just leave them in, they also have holes for rebar between bays.
On the flip side I've also seen yards poured in 40m2 sections at 200mm deep (full 8m3 wagon loads) with no membrane or insertable expansion joints with single layer of thin mesh with zero issues 5+ years later

K-form

they're £38 for 3 metres normally but you'd need the riser to take them unto 200mm so another £8 for 3m hardest thing is finding a supplier as online they want £100 postage

K-Form

www.kform.co.uk

 

[Smiffy]

K-form

they're £38 for 3 metres normally but you'd need the riser to take them unto 200mm so another £8 for 3m hardest thing is finding a supplier as online they want £100 postage

K-Form

www.kform.co.uk

This lot stock them should have a branch somewhere nearish

Branch List - Burdens | Civils & Utilities Experts

Branch list

www.burdenscivils.co.uk

 

[Giles]

This lot stock them should have a branch somewhere nearish

Branch List - Burdens | Civils & Utilities Experts

Branch list

www.burdenscivils.co.uk

ive accounts with them but last time I rang they didn't have any within 50 miles and wanted 3 days or so to get them so just used 6x2

 

[DaveDCB]

8ft cow trough to make the catch pit, was about £300, bedded on a semi dry mix, had my fabricator guy knock up a lid and concreted the lot in, c35 150mm with mesh, had all sorts drive over it with no problems!
you have to chamfer down the last kerb channel so it runs flush into the lid.

 

[Smiffy]

ive accounts with them but last time I rang they didn't have any within 50 miles and wanted 3 days or so to get them so just used 6x2

Must vary by depot
We go to the Gatwick one and I don't think I have ever asked for anything that's out of stock
Good couple of acres and huge outdoor pallet racking

 

[DaveDCB]

Ps the forum photo upload really winds me up! Why it flips every image I upload is beyond me!!

 

[goldeneagle]

Have found with concrete that if you can keep off it for 28 days will do the world of good. Running on it after a few days will not show any immediate damage but will do internal damage whilst its curing. Vibrating it properly to get the air out then working the cream to seal it will help seal it and prevent frost heave. We also cover concrete with plastic sheet during the curing process to prevent it drying out to quick.

 

[Furniss]

8ft cow trough to make the catch pit, was about £300, bedded on a semi dry mix, had my fabricator guy knock up a lid and concreted the lot in, c35 150mm with mesh, had all sorts drive over it with no problems!
you have to chamfer down the last kerb channel so it runs flush into the lid. View attachment 20107View attachment 20108View attachment 20109

Nice work

 

[Gunners]

Ps the forum photo upload really winds me up! Why it flips every image I upload is beyond me!!

Looks right for the Auzzy guys on here