New Concrete is Chalky

[NY98M3]

Got my floor poured about 5 months ago but the floor is still chalky...Besides painting it right now, anyone know how to get rid of the constant chalk? If you lay on the floor you get concrete dust all over you.

I dont want to park my car in there until it stops coming up.

Anyone have any pointers?

 

[dadsEH]

Wash it down

 

[shaun oriold1]

Coat it. ITs always going to be that way. IT will get less, but it will always be dusty....

 

[logixjock]

What exactly causes this? I've seen chalky pads before and always wondered.

 

[DekeT]

What exactly causes this? I've seen chalky pads before and always wondered.

Overworking the top will bring too many fines to the surface.

 

[shaun oriold1]

http://www.cement.org/docs/default-...defects-causes-prevention-repair.pdf?sfvrsn=4

Here is a great article on concrete problems. Search for "Dusting" Read the whole paper for that matter.

 

[NY98M3]

Thanks for the reply guys, looks like I might have to take off the top layer...its driving me crazy

 

[LegacyIndustrial]

Any coatings will eventually release/delaminate if not dealt with head-on. Grind it well.


Sent from my iPhone using Tapatalk

 

[logixjock]

http://www.cement.org/docs/default-...defects-causes-prevention-repair.pdf?sfvrsn=4

Here is a great article on concrete problems. Search for "Dusting" Read the whole paper for that matter.

Thanks for the link, answered several questions I've had over the years.

 

[NY98M3]

Any coatings will eventually release/delaminate if not dealt with head-on. Grind it well.


Sent from my iPhone using Tapatalk

What should be used to grind it down? Its pretty smooth right now, just chalky

 

[shaun oriold1]

What should be used to grind it down? Its pretty smooth right now, just chalky

your answer is here..... http://www.garagejournal.com/forum/search.php?searchid=18332775

 

[NY98M3]

your answer is here..... http://www.garagejournal.com/forum/search.php?searchid=18332775

it is? Its not finding anything lol

 

[PatStroud]

NY98M3 ......... had the same issue with my slab. The contractor worked it too much. My fault, should have told what I wanted in terms of a final finish.
Anyway, powerwashing, grinding, etching, and final power wash got it good enough for me to seal.

 

[EpoxyCoat2]

You can use a diamond grinder to grind down to a hard surface of concrete. As Scotty stated previously, any coating applied will eventually release if it is applied onto a chalky concrete.