Yard concrete.

[Pebd99]

Just away to concrete a bit of the yard. There will be lorries on it. Thinking 250mm deep of r35 air entrained concrete with a393 mesh at the bottom. Unsure whether to get structural fibres as well. An extra £18 a cube for them. Not wanting to do it again but is it overkill?

 

[workin f nowt]

I'd go for 45 and not bother with the fibres. Making sure you cut plenty of expansion joints

 

[suffolksmallholder]

Look up how to cure concrete. In this weather correct curing is paramount. Put DPM under, it helps.
SS

 

[kermit]

Regarding d p m, is there any reason I can’t use 2 layers of standard black silage sheet?

 

[crashbox]

Regarding d p m, is there any reason I can’t use 2 layers of standard black silage sheet?

Will be fine

 

[suffolksmallholder]

Regarding d p m, is there any reason I can’t use 2 layers of standard black silage sheet?

None at all. The main thing is to retain the water it is mixed with. DPM is thicker which reduces pressure damage from imperfections in blinding.
A good cure is king plus of course a good stable substrate.
SS

 

[upnortheast]

Just away to concrete a bit of the yard. There will be lorries on it. Thinking 250mm deep of r35 air entrained concrete with a393 mesh at the bottom. Unsure whether to get structural fibres as well. An extra £18 a cube for them. Not wanting to do it again but is it overkill?

250mm is a thick slab ££££
If your base is solid I would have thought 150mm with mesh would be fine. Maybe go to 200 mm if any point is getting lorries regularly turning
As above read up on cureing
When we did our road got a 200 litre drum of cureing chemical & sprayed it on with the knapsack sprayer.
or if practical keep it covered with a sheet, especially in summer

 

[Longneck]

Make sure they dont use a "blend" mix, it basicaly means that instead of cement they put slag ash in and it takes a lot longer to go off.

Hanson did this with me recently, still said C35 on the ticket though!!!

 

[Pebd99]

250mm is a thick slab ££££
If your base is solid I would have thought 150mm with mesh would be fine. Maybe go to 200 mm if any point is getting lorries regularly turning
As above read up on cureing
When we did our road got a 200 litre drum of cureing chemical & sprayed it on with the knapsack sprayer.
or if practical keep it covered with a sheet, especially in summer

It’s the slab right in front of the grain store so 100 odd grain lorries a year plus the rest.
It’s expensive to do but it’s really expensive if it’s not done 100%.

 

[wr.]

Make sure they dont use a "blend" mix, it basicaly means that instead of cement they put slag ash in and it takes a lot longer to go off.

Hanson did this with me recently, still said C35 on the ticket though!!!

They did the same with my son in law. It took days to go off properly. Well over a week to harden but it's good now.

 

[Lakesdigger]

Make sure they dont use a "blend" mix, it basicaly means that instead of cement they put slag ash in and it takes a lot longer to go off.

Hanson did this with me recently, still said C35 on the ticket though!!!

They use blend all the time unless you specify otherwise or the particular grade of conc requires otherwise.

 

[RWG Contracts]

Make sure they dont use a "blend" mix, it basicaly means that instead of cement they put slag ash in and it takes a lot longer to go off.

Hanson did this with me recently, still said C35 on the ticket though!!!

RC35 concrete has to meet 45N/mm2 after 28 days, they could mix jelly babies in the mix and as long as it meets that strength it’s still an rc35.

A concrete mix with a blend is easier to work with than a straight op mix.

 

[HatsOff]

The slag ash stuff will be stronger in the long term but need to have the time and conditions to cure.

 

[Longneck]

RC35 concrete has to meet 45N/mm2 after 28 days, they could mix jelly babies in the mix and as long as it meets that strength it’s still an rc35.

A concrete mix with a blend is easier to work with than a straight op mix.

I was told after not to drive on it for 4 weeks

 

[Longneck]

They use blend all the time unless you specify otherwise or the particular grade of conc requires otherwise.

But when it comes out the wagon and looks visibly yellow instead of grey, it just doesn’t look right.

 

[Doing it for the kids]

I’m gearing up to fit a new drive off a road with a concrete road apron into the bell mouth (tarmac tends to rip up in the summer)

Ona zoom today engineer said a 200mm slab well ,aid would be sufficient.

I’d say 250mum is overkill. Slabs can be engineered to be thinner but as strong these days due to adding other bits to them

 

[RWG Contracts]

I was told after not to drive on it for 4 weeks

That’s fair enough. I usually tell people 2 weeks knowing full well they’ll manage a week.
Do you have the tickets from your concrete pour so I can see the cement content?

 

[Banana Bar]

200mm with 252 mesh is plenty for any lorries. If it’s not, then your base isn’t good enough!

 

[quattro]

It’s the slab right in front of the grain store so 100 odd grain lorries a year plus the rest.
It’s expensive to do but it’s really expensive if it’s not done 100%.

We did our grain stores 6in inside and outside and not been a problem
id say no more than 200mm
I think it’s more to with prep of base

 

[Uggman]

250mm is a thick slab ££££
If your base is solid I would have thought 150mm with mesh would be fine. Maybe go to 200 mm if any point is getting lorries regularly turning
As above read up on cureing
When we did our road got a 200 litre drum of cureing chemical & sprayed it on with the knapsack sprayer.
or if practical keep it covered with a sheet, especially in summer

Hessian is the best to keep it cool just keep it damp