Hello

I have searched the internet and the forum but haven't found what I'm looking for.
I am going to cast a floor, but it's an intermediate floor (between the ground floor and the basement).

I want to know the load-bearing capacity per dm² of concrete if you have a layer of 4, 5, 6, 7, 8 cm thick concrete.
Then there might be values if you have reinforcement as well.

I want to cast as little concrete as possible and increase the amount of insulation. Today, the floor is 12 cm thick and without reinforcement, so I have to replace it. I then have about 10 cm to use, but there I need both insulation and to lay underfloor heating.
 
Sounds impossible that it's not reinforced. Unreinforced concrete has virtually no load-bearing capacity whatsoever.
 
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fahlis and 1 other
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Why should you change the floor and if it needs to be replaced why cast a floor, can't it be framed up with wood?
 
What exists today is from 1938 and there is no reinforcement in it.
I don't want wood in the construction as it is a stone house and the basement is not heated.
What I pour will of course be reinforced, but the question is how thick a layer I need to pour.

X cm Self-leveling compound
X cm Underfloor heating
X cm Insulation
X cm Load-bearing concrete with reinforcement.
 
But why change, what is wrong with the existing floor?
 
Depends a lot on reinforcement and the span in question. Your question cannot be answered.
 
H
you basically won't get below 8 cm of concrete in any case.

With reinforcement and approved cover both above and below, you are at least at those thicknesses.
With thinner, you will get problems with shrinkage cracks, edge lift.
 
Ok, thanks for the feedback.
We'll try to use what we have,
 
F
I have 20cm of concrete with coarse reinforcement at the top and bottom edges. It spans 9.5x5m without any additional support. A good friend has 12cm in his garage but a support wall and a significantly smaller span. A cast vault is not something you can estimate roughly, it must be calculated by a structural engineer, or alternatively, you can get the design "for free" from the supplier of, for example, permanent formwork.
 
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