Black concrete?

[Pompe1997]

Hello
I am currently working on casting new slabs for the outdoor area and want black slabs.

Is there some type of pigment or something I can mix into the concrete during mixing?

I have already cast 4 slabs at 850*850 mm, and they look amazing.

But as I said, I realized I want them black!

If anyone has experience with this, I would be grateful.

 

[brumbjorn]

The answer is available on the forum. Just search on Google for black concrete pigment for example.

 

[Helioz]

Quite large amounts of pigment are needed to create truly black tiles. Iron oxide is best as it is inorganic, but carbon black can also be used, although it tends to fade more over time. Ottossons has larger packages:
http://www.ottossonfarg.com/sv/produkter/farg-fargmaterial/fargpigment/svarta-gra/kimrok-1-kg.aspx
http://www.ottossonfarg.com/sv/produkter/farg-fargmaterial/fargpigment/svarta-gra/jarnoxidsvart-1-kg.aspx

Mix in about 4-5% pigment of the cement weight as a starting point.

 

[Johan Gunverth]

Claessons have in 25kg packages

http://www.claessons.com/produkter_info.asp?nid=2377