ᐅ Concrete slab constructed with a break interval

Hello,

a case example:
the construction company ordered too little concrete and only poured the last third of a floor slab after 13 hours.
Weather: 10-15°C (50-59°F) and rain.

Is this still acceptable, or can long-term damage be expected?

Thank you and best regards

Don’t worry, if they have taken it into account, nothing will happen! What do you think, how are large buildings constructed, for example?

When building a single-family house, has it been "taken into account" that the concrete is poured in two stages? I don't think so...

I would definitely follow up on this, preferably with external expertise, to ensure how the structural integrity between the parts is guaranteed.

If it is a waterproof concrete slab (WU slab) and an unplanned construction joint has formed, meaning no joint tape was installed, the waterproof function of the slab is lost. If it is not a WU slab, I do not see a major problem there.

Hello,

thank you for the responses.

It is/was a waterproof concrete slab, but I didn’t really trust it and wanted to have a vapor barrier and waterproof membrane installed as well. Now they are including it for free, or rather, the roofer will install the waterproof membrane, but the shell builder will pay for it.

It’s certainly not the ideal solution, but I don’t really want to remove everything and start over either, and that would probably be too much anyway.

I’m less concerned about the load-bearing capacity now, especially when I see what kind of foundations and houses our neighbors are building... their slabs are weaker, and their houses sometimes weigh three times as much. (heavy, thick concrete blocks)

Good evening,

Iulius schrieb:

Is this still acceptable, or should late consequences be expected?

Yes to the first part and no to the second part of the question.

Constructing the foundation slab in sections is a common practice on construction sites, even for larger building projects. As long as care was taken to create a rough and angled edge (not smoothed) at the end of each pour and the reinforcement was left with adequate overlap, there will be no issues.

Regards, Bauexperte