Still have dust!

[larryv]

720 Sq ft garage floor that has been Diamond grinded and I have washed and scrubbed three times now using a coarse push broom and still have very slight dust on the concrete. Should I use a power sprayer? The floor is like sandpaper so i believe that i do not need to etch. What do you guys recommend? Thanks again.

 

[Rick3Foxes]

I had a bit of dust after the etching and drying.
I finished up by brushing with a stiff brush and then running over it with a shop vac.

That seemed to take care of it.

Rick.

 

[Ruddy]

I did the acid etch method, but rinsed with the baking soda then a couple of more rinses all using an electric pressure washer with the nozzle on the low impact fan setting. Followed up the final rinsing with a shop vac.

 

[spfloorsnmore]

I have good luck with a microfiber type dust mop. It is about 18" wide with washable pads.

 

[tncatadjuster]

If floor is like sandpaper maybe your seeing broom fibers. You can always broom hard enough to raise dust. Blow it and let the primer contain it. The get picky

 

[tcianci]

Concrete will always dust unless you top coat it. That's one of the reasons we epoxy the floors in the first place. As long as you have the proper "tooth" in the surface for the epoxy and you give it one final vacuum cleaning before your coating, you will be ok.

The amount of dust that concrete floor generates is a function of the abrasion against the floor, the amount of Portland cement in the mix and how the floor was finished.
A weak mix with insufficient Portland cement can result in a floor that is easily abraded and will always "powder" on you. Also over finishing a floor will tend to yield a beautifully smooth surface but it also pushes the stone and sand in the mix deeper into the surface leaving just the "cream" on top which is powdery when dry.