ᐅ Recycled crushed stone for foundation slab

Created on: 9 Sep 2021 21:08
O
Oraclefile
Hello,

what is your opinion on buying recycled crushed stone for the house’s foundation slab? We need to overcome a relatively large height (1.2 m (4 feet)), and this could save a considerable amount of money. So far, I have heard mixed opinions but no real explanations.

What are your thoughts on this topic?
G
guckuck2
10 Sep 2021 19:37
The permit costs here ranged between 100 and 200 euros.
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Stephan—
11 Sep 2021 22:35
We do not have an expert report, as yellow sand appears from 40cm (16 inches) down. I was told that this is ideal building ground. We then placed and compacted the removed topsoil in layers with 500 tons (about 297 cubic meters) of RC (recycled) concrete with 0/45 aggregate size. Costs here are €10.45 per cubic meter (net). Carried out as a DIY job, and a family member who is a civil engineer should have given good advice. 🙂
H
HausTmMike
11 Sep 2021 22:38
Stephan— schrieb:

We don’t have a soil report because there is yellow sand starting from 40cm (16 inches) depth. I was told that this is an ideal building ground. We removed the topsoil and then installed and compacted 500 tons (approx. 297 cubic meters) of RC (recycled) concrete with 0/45 grain size in layers. The cost for us was €10.45 per cubic meter (net). It was done as DIY, and a family member who is a civil engineer probably gave good advice. 🙂
€10.45 including delivery? That’s very cheap! Sometimes it’s good if the gravel pit is just a few kilometers away. I already pay €11.5 per cubic meter for pickup myself.
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Stephan—
11 Sep 2021 22:42
€10.45 was just for materials; we picked them up ourselves in 27 trips from a distance of 3km (1.9 miles). 🙂
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HausTmMike
11 Sep 2021 22:45
Stephan— schrieb:

€10.45 was just for materials, we picked everything up ourselves over 27 trips from a distance of 3m (10 feet). 🙂
I filled in 50–60cm (20–24 inches) of fill sand on top of gravel soil, around 500 tons (metric) in total. My excavation contractor (who, funny enough, is also a family member) gave the same advice: compact in layers and water thoroughly, and then everything will be perfect. For terraces, driveways, etc., I then got another 200 tons (metric) of recycled concrete.
S
Stephan—
11 Sep 2021 22:47
We would have had to source other materials from further away, so everything became RC.