Was blue concrete used as additional insulation?

[petererlandsson1194]

What appearance characterizes slag plates? What I have is very typical of blåbetong, i.e. gray-blue towards the blue side - light and porous. In addition, a short-term measurement showed high radon levels so we will tear everything out.

Very similar appearance to blåbetong but possibly a bit grayer and more porous.

Blåbetong was most common in the 60s-70s even though it has existed longer than that.
I would tear it out regardless as it is entirely useless for attaching anything with weight.

 

[Dublin]

The following article has some information about blåbetong and two images,
[link]

In the following post, there's an image of how the blåbetong looks at our place,
[link]
Another post with an image of our blåbetong, during demolition,
[link]

Thank you. Looks exactly like ours.

 

[Dublin]

Very similar appearance to blåbetong but possibly a bit grayer and more porous.

Blåbetong was most common in the 60s and 70s even though it has existed longer than that.
I would tear it out regardless as it's completely useless for attaching anything with weight to it

Yes, we have decided to tear everything out especially since the radon measurement showed high levels.