ᐅ Concrete slab with polymer fibers and reduced reinforcement steel

Created on: 3 Feb 2024 09:43
R
roestzwiee
Hello everyone,

Let me briefly introduce myself, as I’m new here.

My wife and I decided at the beginning of 2023 to build a house, and we are working with the companies Danwood and Glatthaar to construct a small one-and-a-half-story detached house.

We recently had the site kickoff meeting with Glatthaar, which went well – we’re excited that the project is finally starting.

Afterwards, I was told on the phone that our house is suitable for a "hybrid slab," and Glatthaar would like to use this to improve their environmental balance.

Today, I received a letter about this. Unfortunately, it doesn’t contain any concrete information, such as how much steel will be reduced or the amount of plastic fibers added to the slab. I have no clue.

So my question is: is this a good solution? Of course, I’m skeptical – like many others building a house, we expect to live in it for a long time. I don’t want the foundation slab to cause problems later on.

Here is a quote from Glatthaar’s letter:

They plan to use "a combination of reinforcing steel and MasterFiber polymer fibers." Furthermore, "the addition of polymer fibers is approved by the DIBt (German Institute for Structural Engineering)."

What do you think? Is this a viable method, or is it better to avoid it?

Best regards and thanks in advance for all your answers!
J
Jesse Custer
3 Feb 2024 13:17
Since I work professionally with both materials and their outcomes, I would clearly favor polymer fibers based on their durability.

And whether they are harder to recycle afterward (which they are), will most likely not matter to you anyway...
11ant3 Feb 2024 14:17
Jesse Custer schrieb:

Since I work professionally with both materials and their results, I would clearly favor polymer fibers based on their durability.
And whether they are then harder to recycle (which they are), is most likely something you won’t care about anyway...

The recycling of this new building material will only become an issue in the next century. Thirty years ago, only a few computer enthusiasts were on the internet, yet today even Aunt Luise and Uncle Hermann are online—I fully trust in progress.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
H
hanghaus2023
3 Feb 2024 15:52
If that was not included in the contract, I would not agree to it.
R
roestzwiee
3 Feb 2024 16:22
Are there any studies or reports on polymer fibers? Have they been used in the industry for 5 years or 50 years?
11ant3 Feb 2024 16:48
roestzwiee schrieb:

Are there any studies or reports on polymer fibers? Have they been used in the industry for 5 years or for 50 years?

Fifty years ago, I was just starting school, so I wasn’t interested in materials engineering yet. In any case, this is by no means a newfangled scheme. As I said, I would use it myself, and I tend to be conservative when it comes to investing.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
J
jens.knoedel
3 Feb 2024 17:04
roestzwiee schrieb:

Are there any studies or reports on polymer fibers? Have they been used in the industry for 5 or 50 years?

The fibers have actually been used in commercial construction for a very long time. You have most likely already encountered them, for example in highway pavements, tunnel constructions (though those mostly use polypropylene fibers), and industrial hall floors. They've been standard practice for over 60 years—there are even industry standards like DIN for them. It’s similar to asking if anyone has experience with concrete roof tiles.
Other applications include components where you don’t have sufficient cover over the reinforcing steel. In those cases, polymer fibers are simply used as a replacement.
In single-family houses, however, their use is not common (or necessary) so far.