Removing Dried Slurry After Grinding?

[JonnyC]

I recently used the Diamabrush Mastic Removal tool to remove carpet glue from my basement floor. I should have used the Prep tool as I wish it had done a bit more grinding. However, I ran it wet but did not wet vac the slurry right after grinding. Well, it's now dried and is not easy to remove.

I have a 1800 psi pressure washer, and that works but only with the jet stream a few inches away. I have tried Behr Concrete Cleaner and Etcher as well as TSP with a stiff brush. They work, but not as good as I had hoped.

Any advice on how to remove this before throwing a few coats of paint down? (sadly I'm doing all of this work only to put a Porch and Floor paint down). I'm wishing I had just paid the money to have a local guy do an epoxy coat from beginning to end.

 

[LegacyIndustrial]

Prep tool?

 

[JonnyC]

Sorry, Diamabrush's Concrete Prep tool, which is more abrasive than their Mastic Remover tool.

 

[Edger]

It should come off with detergent and a broom, then pressure wash away. Trick is to agitate it enough to loosen it down to the surface of the floor. Keep gently agitating it until you see the concrete underneath. It can take time for the cleaner to penetrate the dried slurry.

 

[porschedude996TT]

Simple Green, Mop and Bucket. I just went through cleaning up after sawing cutting and demo for my in-floor lift.

 

[JonnyC]

I don't have a mop, but I will just continue with the TSP (or I'll try Simple Green), stiff broom, and wet vac. Thanks guys.

 

[JonnyC]

Well this is a nightmare. I'm painting the floor with a basic Porch and Floor paint and I've turned this into a bigger project than it needed to be.

I used the cleaner/etcher, brush, vac, TSP, brush, vac (in some cases squeegeed). I then hit it with my pressure washer just trying to rinse any residue off. Well there is still a layer of slurry in the pores where the pressure washer didn't hit as you can see in this picture...



When I wipe my hand on it I can see a little bit of dust on my hand, but not like before. Am I going overboard? At this point I don't know what else to do.

 

[retfr8flyr]

Buy one of these http://www.amazon.com/dp/B003E5HNNA/?tag=atomicindus08-20 The only way to get an even cleaning on the floor. The best way would be to rent a bigger pressure washer and the floor washer attachment they rent. That's kind of over kill and the one I posted should get the job done and you would have it to use for future projects.

 

[Edger]

Probably overkill now, but those spinning water jets are great. I experimented and found that after acid etching it took a minimum of 3,000psi water jet at very close range to remove the whitish residue. I had an industrial version of the Karcher and used to run it at 5,000 psi which had a 150 hp pump - definitely overkill for a small job, but no residue.

 

[JonnyC]

Well now I'm leaning towards buying a 7" or 9" angle grinder, dust shroud, and possibly the Diamabrush 7" wheel to hit the entire floor again. I can then use the same tool in stages in my garage for an epoxy coat.

 

[retfr8flyr]

If you do that get get one with variable speed. A normal grinder turns too fast for grinding concrete, you will have much better results with a slower speed.