Concrete Sub-Base - Question For The Builders

[RTurlough 160]

Lads I have a bit of a question, I am just wondering if 11 bags of concrete and 2 1/2 tons of sand gravel mix will fill my shuttering at 4m x 3m.

 

Any labourers on here with a good head for concrete volumes able to help me out?

 

 

 

Also, in terms of concrete thickness 3 inches is what I am aiming for.

Edited February 24, 2017 by RTurlough

[ands 544]

Hell yes, 0.9 m cube

[Rabid 1,936]

You will need 0.9 m3

 

To mix a c20 mix you will need

 

288kg cement

1620kg ballast

270 litres of water

 

So on the quantities you have given, more than enough ballast, but slightly short on cement, depending how good your sub base is I wouldn't worry about it and use the 11 bags

[RTurlough 160]

I suppose I can always shutter off a section if I fall short of cement, finish that cell and then redo the rest that same day or next day.

[RTurlough 160]

Thanks for the ratio. Always good to get advice from those working on it day in day out.

[Lenmcharristar 9,782]

I suppose I can always shutter off a section if I fall short of cement, finish that cell and then redo the rest that same day or next day.

just order or make 1 cubic metre then you'll have enough. As long as it's 75 MM deep, check with a straight edge and tape over a few parts of your shutter to be sure that's how much you need

[RTurlough 160]

I intend shuttering the full depth of 2x4 so that should be deep enough, what ya think?

[king 11,972]

Are you making a kennel run base RT.

I'm going to be building kennels this year myself.

And need to build a slab first.

[BlackBuck 655]

Rt make sure the ground under the Base is well packed does not harm to give it a good go with wacker plate . As someone else said dip it here and there and you shouldn't be far away . If you can try not to put the concrete down on a frosty day , where you based ? If local I'd gladly give you a hand with it . Have worked with concrete for years

[Lenmcharristar 9,782]

I intend shuttering the full depth of 2x4 so that should be deep enough, what ya think?

4x2 is 100 MM deep mate there for you'll need 1.2 cubic metres

[fat man 4,741]

1 metre of concrete = 10 metres by 1 Metre at 4in in depth.

[jeemes 4,484]

Lads I have a bit of a question, I am just wondering if 11 bags of concrete and 2 1/2 tons of sand gravel mix will fill my shuttering at 4m x 3m.

 

Any labourers on here with a good head for concrete volumes able to help me out?

 

 

 

Also, in terms of concrete thickness 3 inches is what I am aiming for.

Think it needs to be at least 4 inches or 100mm deep.

[Francie 6,368]

1 metre of concrete = 10 metres by 1 Metre at 4in in depth.

Thanks for that fatman, now thats layman terms lol

[p3d 879]

The base will have to slope to a drain.

If you want a 4 inch ( 100m) minimum thickness then it will need to be 6 inch (140mm) thick at the high end in a 4m long run.

Or 5 inch (130mm) on the 3m wide side.

You can slope the base underneath the 4 inch slab but that would not be the usual way I believe.

[RTurlough 160]

Lads I am ready to go. Channel drains are in and I have a natural slope to the drain due to the lie of the land. Just to shutter with 1 degree of slope towards the drains and I am ready to mix concrete. I'll go with what I have got 11 bags of cement and 2 ton of sand gravel ontop of my already laid 2ton of blinding. If I fall short that is a good thing. It means I can do the last foot to the drains to make an absolutely first class job of how the water flows away.

 

I'll get photos up in the next fortnight of the finished. Great to get the advice.

Edited February 25, 2017 by RTurlough