Breakthrough for underfloor heating accidentally filled with swelling mortar

Hello everyone,

a very brief description of the problem: Today, without my presence, fortunately, I had support from family on the construction site. The breakthrough for the underfloor heating to the basement was closed. Unfortunately, not with screed concrete, but with expanding mortar. I should have explained it better in advance. The packaging says "non-expanding, non-shrinking."

I am not very familiar with the properties of building materials, but I understand expanding mortar to mean that it swells a bit. Is there a possibility that the mortar might damage the underfloor heating pipes? Or is the concern a bit exaggerated? I'm a bit panicked...

Regards

So you basically write it yourself, it is on the one hand not shrinking, but on the other hand also not expanding. That means it does not expand either, and therefore nothing should actually happen there. How he is otherwise suitable/was suitable for the position, I do not want to judge further. But he should not damage the pipes of the underfloor heating. He is usually used where one precisely does not want the mortar to shrink during drying.

Without being an expert, I would also want to press the emergency stop button.

On the one hand because it says "quillt nicht",
on the other hand because pipes are extremely resistant due to their round shape.

:)

Hmm. Swelling mortar swells. Not as much as expanding foam, of course. But it does swell slightly, which is why it's called that. I wouldn't be too concerned about damaging the pipes due to swelling. But heating, maybe? Screed for underfloor heating gets some fiber material mixed in so that it can move. Swelling mortar can't do that. That's where I would have question marks on my forehead.

This is about pipe penetrations between two floor levels. These penetrations are now or have been sealed. Whether one uses an expansive mortar or a repair mortar for this is actually irrelevant from the task perspective. Any reasonably stable mineral mortar can be used, as long as there are no fire protection requirements. The mortar should not rest directly on the pipes. When the pipes expand during heating operation, they are held there and break loose with a more or less loud crack. When the heating starts up again in the early morning after the nighttime setback, this can be acoustically noticeable. Screeds, including heated screeds, can be installed without "fiber stuff" (what a term!). Fiber additives have no function in the sense that a screed "works" ("can function"). Fibers only have one single task during the drying phase: crack minimization (not prevention!). Cracks in mineral components, especially cement-bound ones, cannot always be prevented! It should be noted (as already formulated by "ateliersiegel"): Press the calming button :-)
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Greetings to everyone: KlaRa