Archived from the Tools In Action forum (Around The House). This thread is read-only.
In my flat, I have 2 internal concrete walls, one where I sleep against every night
Im worried that I am exposing myself to silica dust or another contaminants that may come from concrete
Im really not sure how much the concrete has been sealed and how much dust is coming from it
Its obviously solid and not crumbling, but when i rub the concrete, its slightly chalky on my hand. Its also not glossy or smooth suggesting it hasn’t been completely sealed?Â
I can see some dust on the ledge below the wall, but dont know how much of this is household dust
What do you think? Is there any risk?
Ive added some inflation below, if that helps
Thanks in advance!
NB: Regarding regulations, Im not in US, but NZ, so not sure regulations here. Flat was built in 2017
BUILDERS INSTRUCTIONS FROM ARCHITECT (dont know what this means)
Interior Concrete Walls (Wet areas): Clear concrete sealer suitable for wet area use
INFORMATION FROM ARCHITECT (again, vague to a layperson)
The external precast walls have a waterproofing additive added (data sheets attached). Internal concrete walls would not have this additive added.
Information on concrete from material guide:
PRODUCT NAME: Cement type; Gp, HE, CT and ASTM Type II
MAJOR INGREDIENTS:
Inert Aggregates 20-70%
Cement 20-50%
Additives + Polymer <10%
COMPOSITION
Portland cement clinker 85-95% 2mg/m3 I (1mg/m3 for respirable dust)
Limestone <10% (10mg/m3)
Calcium sulphate hemihydrate (10mg/m3)
Flyash <3% has (see crystalline silica)
Gypsum <5%
Quartz <0.1%
Hexavalent chromium <0.002%
Crystalline Silica (all forms) 0.05mg/m3 (as respirable dust)
PRODUCT NAME: Micosilica SF
Composition:
Silicon dioxide (amorphous) >85%
Crystalline silica <0.67%
Great question and not sure. It looks very cool. I would image you can wipe it clean then seal to keep the beauty in tact and also protect yourself. I know a lot of people use concrete countertops so I am sure there is a way.