Hello Peanuts
I have a square enclosure in mind. About 10 x 10 meters. 20 cm thick. Would need roughly 14 m³ of concrete. If mixed yourself, you’re looking at 40 - 45 euros per m³.
Plan the openings for electricity, water, sewage, etc. right away. Some reinforcement inside. That holds.
And it's amazing what is given away or sold cheaply on Ebay-Kleinanzeiger. You just have to be creative.
And when money is tight, creativity is required.
Steven
Um, no idea if you can also get gravel and cement for free, but for me the calculation (roughly) looks a bit different:
10x10 m is unrealistic because you still need working space around the house, so rather 13x13 m.
That would be about 50 running meters, 1.7 m high and the assumed 0.2 m thick, making 17 m³ of concrete.
Dense concrete approx. 2500 kg/m³
With mixing ratio about 1:4 you need 500 kg cement, i.e. 20 bags.
I haven’t found any below 2.- € per bag yet (but grateful for tips).
Just the cement part costs about 40.-
Gravel (need 2000 kg) costs about 30.- € per ton for us, i.e. 60.- €/m³. So we are already at 100.- €/m³ (self-mixed) without water, electricity, and labor.
A steel reinforcement mesh 2 x 6 m also costs about 50.- and you need several.
Apart from the fact that you can’t mix this amount all at once and the concrete wouldn’t be homogeneous, there is the question of how you want to secure the entire wall from falling over?
Dig a deeper trench and anchor the wall underground or pour an "L" shape, which requires even more work and concrete?
For that money, you can slope with RCL very gently, even with natural gravel you have less than 45°.
I myself also have a natural stone wall of similar height, which I catch behind with concrete as self-poured L-beams in 1 m pieces.
However, these are not 10 m and do not have to hold a house.
Don’t take it the wrong way and it’s not meant badly, but I think this recommendation is madness!
: Filling is truly not rocket science, you just have to make sure the ground is load-bearing and then fill and compact cleanly in layers of 15-20 cm. It takes time, better to run over it twice as much, then it will also be firm. How it works with RCL I don’t know, but natural gravel definitely has to be a bit moist when compacting!