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Woody.v8
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Is that with limestone instead of pebbles so it wears evenly on scraped yards?
Edit: just looked it up and its c35 with minimal cement for use with rebar as not to corrode it, apparently!
Wendelspanswick
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C35 is concrete with a compressive strength of 35 Newton's after 28 days curing.
RC35 has the same strength but is mixed with the minimum cement content to minimise corrosion with reinforcing steels.
https://www.concrete2you.com/products/rc35/
C35 can be specified with the addition of fibres but it's still C35, the same with RC35.
The only reference I can find to R35 concrete is a proprietary walling system?
daleyd
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Yeah, it's a general spec concrete for use with reinforcing bars.
I'm sure someone with more knowledge than me will be able to give you the figures but I have a little knowledge as my dad was a foreman for a large civil engineering firm who specialised in concrete structures. When I was growing up I used to go to school stinking of soap oil (release oil used on shuttering) - if I never smell that again it will be too soon!!
It's not, and never has been called r35 though.
If your going to correct someone (not aimed at you woody!) you should at least check your facts.
8ob
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Thats the concrete sorted then 
Just a couple of things, its well worth including a DPM under the concrete and its also worth organising one of those mixermate type batchers when you order the concrete. It will give you plenty of time to lay and finish the concrete, they only charge for what you use and the dont make the same mess when washing out. Its also worth giving some thought to duct entries in the slab, its a lot easier to install a few ducts into the base for cable/waterpipe entries than trying to get them in at a later date. Just thoughts.
Edit: forgot to add float finish rather than tamp, if you spend some time on the float finish you will get away with sealing/painting the surface as is.
Bob
Just a couple of things, its well worth including a DPM under the concrete and its also worth organising one of those mixermate type batchers when you order the concrete. It will give you plenty of time to lay and finish the concrete, they only charge for what you use and the dont make the same mess when washing out. Its also worth giving some thought to duct entries in the slab, its a lot easier to install a few ducts into the base for cable/waterpipe entries than trying to get them in at a later date. Just thoughts.Edit: forgot to add float finish rather than tamp, if you spend some time on the float finish you will get away with sealing/painting the surface as is.
Bob
Ton-up
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The concrete thickness is not as important as what is under it. 4" minimum will be fine but just digging down the thickness of the slab wont be enough depending on your ground. You need to get to solid earth, ideally wacker plate it down, then 4" or more of hardcore then concrete with steel mesh.
I know it will cost more, but I am talking as someone who built a 14'x28' garage/workshop 25 years ago when I didn't know better and the slab has split into 4 and sunk!
I know it will cost more, but I am talking as someone who built a 14'x28' garage/workshop 25 years ago when I didn't know better and the slab has split into 4 and sunk!
Thats the concrete sorted then
Edit: forgot to add float finish rather than tamp, if you spend some time on the float finish you will get away with sealing/painting the surface as is.
Bob
Going for the batch mix option. We have a company 2 miles away that does it. Was contemplating power floating it to finish it, but not sure I'd be capable of that.
8ob
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You dont really need any more than a hand float on an area that size Gav, we have a few lads employed that do the landscape side of things which often involves concrete and they made me purchase a 4` wide float for doing concrete bases. With a little care they can get a finish on par with a screed, twist the handle one way and the front edge raise slightly and the other way the reverse edge raises. Its all in the wrist action boys
Bob
Nice work @Exuptoy , heres one our landscape lads were doing a few weeks ago. 160ton of batch mixed through a concrete pump in less than four hours.
Lifted one of the slabs this afternoon to investigate what lay beneath. Pleased to uncover a 2 inch layer of crushed whin stone on top of general stone/rubble/clay. Hopefully I can get that compacted fairly well with a whacker plate and I can go for a 4" slab of concrete.
The "boss" has decided she needs space at the rear of the workshop to store the wheelie bins neatly (we have 3) so I've had to sacrifice 2ft off the length. New sizes now 16ft x 9ft - still gives me ample room for a machine shop.
The "boss" has decided she needs space at the rear of the workshop to store the wheelie bins neatly (we have 3) so I've had to sacrifice 2ft off the length. New sizes now 16ft x 9ft - still gives me ample room for a machine shop.
Exuptoy
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will have to wait till Friday now to get more done as working crap shifts this week at work.
28 of them lifted in under an hour. Used a mattock, as seen in the picture, to prise them up to a vertical position before moving to the back wall. Got a whacker plate hired for Friday to compact the area before laying out for concrete which will hopefully be on the following Tuesday.
No thoughts of doing that. I plan on having some matting of some description at the lathe and workbench areas so I am not standing on the concrete whilst working. I'm hoping that with it being a wooden construction it'll be warmer to start with. Insulation will be going on the walls and ceiling.
slim_boy_fat
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The packs of tiles available in Costco are excellent for that, but don't stand up to 'hot' work......
Otherwise, what about a shallow height duck-board, like the old boys used to use?
The packs of tiles available in Costco are excellent for that, but don't stand up to 'hot' work......
Otherwise, what about a shallow height duck-board, like the old boys used to use?
would put me to high at the lathe. I'm 6'2" and find the Boxford a bit low as it is. I have the foam rubber interlocking matting you can get in Halfords etc. It's ok, but I'm going to look into getting some good quality anti-fatigue matting. The type with the holes in it that allows the dust and dirt etc to drop through.
Booked the concrete this morning to be delivered next Tuesday. it's only 1.5m3 that's needed. went for a 30 strength mix and came in at £235 inc VAT. no idea whether that's a decent price but it's a very local company and they have a good reputation round here. It's a volumetric batch mix truck so I'll only pay for what I use.
Got the base all compacted down. It's chucking it down here today so it doesn't look pretty, it it's nice and firm now though. If the weather picks up a bit I'll consider laying out the formwork. Not going to put the dpm down today as it will just hold the rain we are forecast to get over the rest of the weekend.
