Blue concrete or not?

[Fredrik07]

What do you say? No bluish tone anyway.

 

[yalazy]

What do you say? No bluish tone at least.

It's very difficult to say from photos, since white balance can change colors a lot. But the "consistency" looks more like blåbetong than Siporex. That kind of sponge-like texture.

 

[useless]

Not all blue concrete is equally radioactive, so conduct a radon measurement if you want to know if there is a potential problem.

 

[TypRätt]

If you don't have access to a digital meter, maybe you don't want to wait too long if you're standing with an open wall that you want to build up again. I had a non-load-bearing wall between what once was a boiler room and the hallway inside that I thought was suspiciously glowing blue. Didn't have time to think long, but since it would otherwise be tiled and nice, it was now or never. Tore out the stuff and replaced it with a studded wall to be able to sleep well.

 

[Fredrik07]

It's very difficult to say from photos because the white balance can change colors significantly. But the "consistency" looks more like blue concrete than Siporex. Kind of spongy.

White balance has nothing to do with it, I gave the description according to what I've seen in reality, and then the blocks are in a very light gray color, if that changes anything

 

[TypRätt]

The white balance has nothing to do with it, I described it according to what I've seen in reality, and then the blocks are in a very light gray color, if that changes anything

I don't think that's blåbetong, mine was very clearly lead blue, but with that said, I'm not an expert.

 

[MrJay]

In addition to emitting radon gas, blåbetong also releases gamma radiation. By measuring with a gamma meter, one can immediately distinguish blåbetong from other building materials.

If you Google images of blåbetong, the concrete in most images appears bluish, but you can also see images with a lighter variant.

 

[yalazy]

The white balance has nothing to do with it, I gave the description according to what I've seen in reality, and then the blocks are in a very light gray color, if that changes anything

OK. Blåbetong can vary a lot in color. It doesn't have to look blue; it can look gray. We had blåbetong in our previous house and have siporex in our current one. The blåbetong looked light gray, the siporex we have here looks almost white.
But regardless, blåbetong doesn't have to be a concern. If it is low-radiation, it gives a very small addition of radon.

 

[anders07]

Very difficult to say from the picture, but it could be blåbetong (although it looks a bit too light in the picture). We have blåbetong in the house, in the basement (older) one that is lead-gray (slightly blue in tone) that emits some radiation (though small) but I have wallpapered it with radiation-shielding wallpaper to contain the small amount that existed. In the rest of the house (built in 1977) there are ytong/siporex and blåbetong that are light gray (about the same color as the "quote boxes" here on building houses...

This kind of gray!

We measured that one too, but it is so low-radiating that it emits an almost immeasurable value, yet enough that it was determined to be "blåbetong."

 

[TypRätt]

All material based on stone emits a little, so the question is just how much. It doesn't have to be alum shale to emit, we have plenty of uranium in many rock types in Sweden.