I would recommend you to use professional help talking about floor concrete, just because I've tried to do it by myself, and I had to pay twice, so maybe it would be better to consult with- Grindu betonavimo technologija , just because of their experience and quality!
For example I have tried to use these http://www.omnistata.lt/Plonasluoksniai-islyginamieji-misiniai-848.html for my house floor, and now I am really happy about it.