Pour the ground slab in sections?

Why don't you just make a slanted continuous floor slab?

I claim you save at most a small 3-digit amount.

With a 160l floor mixer you actually shouldn’t start, you won’t finish.

Here, concrete 0-16 costs about 130 euros per cubic meter, plus pump about 250 euros per hour. I say, all in at 6 cbm for not even 1500 euros. Just calculate the material alone, a pallet of cement usually costs from about 200 euros, depending on transport it can quickly be 300.

You are not building a pool but a swimming pond. A Natural Pool only has a regeneration zone for aesthetic reasons. Due to the concept, you do not install much technology. This relativizes the price again. The water should not be warmed above 23 degrees. Please keep us updated. With pictures. We also thought about it for a while. But then switched to a proper pool for several reasons.

No continuous slope was the plan in order to better pour it into sections AND when you come in from above via the masonry stairs, you still have a small "landing" to stand on before it slopes down.



I have now requested quotes from 4 different suppliers and then I will see exactly how much this whole thing will cost me here and then I can calculate against the creation by manpower. I will report back.



Not quite correct. The regeneration zone is not for aesthetic reasons. After passing through a coarse filter, the water is directed into this zone and then cleaned of fine particles by the plant filter and gravel before being returned to the swimming area. The water is artificially heated only in spring and autumn to start the bathing season earlier and keep it going longer because anything below 23 degrees water temperature is no fun... at least for us. In the height of summer, the water jumps up to 30 degrees, but that is no problem either. The plants adapt perfectly to the cycle. You just must not make the mistake of planting species that contribute to algae growth... there are only a handful of grasses suitable for this. By recirculating the water into the swimming area through a filter, all suspended particles that break off from the plants are filtered out.

But back to the original question
How can I possibly pour the base slab in the mentioned sections and what do I have to pay attention to here.

In a natural pool, the regeneration zone is only for appearance since a filtration system with a biological stage (not regeneration zone) is used. I had already mentioned that you are building a swimming pond (with mechanical coarse filtration). There are various gradations regarding the use of technology and the resulting ratio between swimming area and regeneration zone from swimming ponds up to natural pools. Please read carefully. The company you mentioned does not even have reference images. I suspect that you have little to no experience with pool or pond construction. Just the statement that all suspended particles are filtered out... you probably only rely on the statements of the pond builder. There is also a lot of misuse regarding definitions... A bow sieve is a coarse filter. In a natural pool, one would use drum filters or (endless) belt filters similar to those in koi ponds. The filtration is much finer. Your system can work. But do not expect perfectly clear water when there is some movement. For example, koi ponds are designed with a throughput of once the pond volume per hour. Even there you still have suspended particles (even without fish). And that with significantly finer filtration and higher throughput. Regarding the concreting, you have already received the answers. Mixing it yourself probably won’t really pay off. Small savings in the three-digit range. If you still do it yourself, it should be possible in one day. Simply strip the formwork and add the connection reinforcement.

I have now requested quotes from 4 different suppliers and then I will see exactly how much this whole thing would cost me here and then I can compare it to the creation by manpower. I will report.

Tip: bring the concrete to the construction site without a pump. Rent a small motorized tipper and accept a slightly longer standing time for the concrete mixer. I did it this way a few years ago. With two men, the base slab for a steel wall pool was finished in 1.5 hours.