Concrete guys - a question please

[dirttracker18]

So when I built my garage I had a floor drain put in. Unfortunately the guy that finished the floor ended up with a hump right where the drain is (about an inch in a 12 to 18 inch circle).

I have been using a floor squeegee to push the winter melt water into my drain for 4 years now and have had enough. The issue is that I have infloor heat so I cannot just bust up that area and rebuild.

My thought is to cut a square about two feet out from my drain, which would go past the hump to the low spots, with a grinder and a masonary disk. I need about an inch and a little down to drain. My thought is to cut about two inches down and chip out the area to that depth. This would leave me with about a 4 foot square rough chipped.

Then I want to refill the area sloped to the drain. This would fix my drainage issues for the most part (save for that one area, damn that ****** finisher).

Can this be done and make it last? Is two inches deep enough to have a reasonable repair? Recommendation of materials for the best repair?

Any advice is welcomed.

 

[bigdav160]

For that small area, why don't you try a diamond cup wheel? I could grind down a spot like that in no time.

 

[dirttracker18]

For that small area, why don't you try a diamond cup wheel? I could grind down a spot like that in no time.

I like the idea, I actually has a less agressive cup already but it was slow going, and brutally dusty It's getting cold out but if it does work pretty fast I could crack open the service door and turn on the big exhaust fan.

Suggestions for finishing after, if any? The underlying stone would be exposed so can I somehow make it look like the rest of the floor or is that just the new look?

 

[Falcon67]

Get two sets of ear muffs and have someone hold a shop vac hose next to the flap wheel.

 

[Burtonrider10022]

cut a few shallow slits in the floor at a slight grade towards the drain.

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Kinda like that ^^ so that the water around it will drain into the slits and then be taken through the higher concrete and into the drain. Obviously, the lines in my "drawing" would go all the way to the drain

 

[sophijo]

If you're going to do all that work you might as well cut out the whole piece; and re-pour with ready-mix; maybe reset drain as well.

 

[ConCretin]

I'd go with the grinder. You'll expose some aggregate but it won't be that noticeable and it will look and perform better than a patch material

 

[dirttracker18]

If you're going to do all that work you might as well cut out the whole piece; and re-pour with ready-mix; maybe reset drain as well.

In floor heat!

There'll be no cutting out a whole piece.

 

[Engineer61]

You may need to search the local rental yards for one, but there is a tool for grinding down concrete - it's like a floor buffer except instead of a scrubbing or buffing pad, it has a wheel with carbide teeth on it. Saw it on one of the Home shows on TV where a concrete floor had been very badly finished (more like it hadn't been finished at all, just poured and left with lots of ridges and humps everywhere) and after a full day of using this grinding machine they got the inspector to finally pass the floor.

 

[FluxCore]

I like the suggestion of cutting the star shaped slots.....super easy and quick...I'd never thought of it....After all, you are just draining water, and that would would work perfectly and could be done with even a hand held HF 4.5" grinder and a few cheap discs

 

[henrysgarage]

That happened to my buddy and he had the concrete guys come back and grind the floor at their expense.