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Levelling concrete a floor

JohnJL

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Joined
Jul 28, 2010
Messages
150
Location
Toronto
I put in a big addition to the garage in the sumer of 2010. The floor of the garage is a combination of a 10-year-old pad where the old garage was, and has an "L" shaped section of new concrete around 2 edges. The seam between them is OK in some places, is rough in others. I plan to install Armstrong VCT after touching up and cleaning everything up.

I installed a Bendpack lift in the new area of the garage and am pleased with it. However I have a problem with the cars "creeping" forward every time they are put down. I do a lot of corner-balancing and alignment work so I am constantly putting cars down, up, down, up, down, up, etc. After a few times, the car moves forward 4-6 inches and I have to roll the car back again on the scales and re-set the lift arms. Its also a pain to set up the levelling tiles every time I want to do some balancing.

The floor has 1.5" of drop over the 14' beneath the lift. I know we did this on purpose to encourage water, etc to flow towards the doors, but I dont really ever have a need for that drainage.

I am considering pouring a thin, "levelling pad" so that the floor is perfectly flat and level under the lift area. Is this a proper practice? Any specific recommendations for the contrete/levelling material?

I was thinking I would;
1. Clean the heck out of it so no residual oil/grease/paint.
2. Rough up the floor with a concrete grinder (I was planning on renting this anyway to finish off the other floor prep)
3. Maybe lay down some chickenwire attached to the existing concrete floor pad in the thicker area to act as "mini-rebar?"
 
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JohnJL

Well-known member
Joined
Jul 28, 2010
Messages
150
Location
Toronto
116 views and no help...OK so here goes...if it goes wrong I hold you all responsible!

The pour starts in the morning...
 

geologist

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Joined
Dec 14, 2011
Messages
5,326
1.5" over 14 feet isn't much, since that would equate to 1/8th of an inch per foot (0.6 degrees). How thick are you planning on pouring your leveling pad? The reason I'm asking is because you're going to have it crack all to hell if it isn't thick enough. Generally speaking, if you're doing a thin pour, this is probably better suited to leveling grout than concrete. More info would be helpful.
 
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mitusa

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Dec 24, 2011
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1,993
Location
SW Oklahoma
I was thinking I'd heard of a new technique to do what your're wanting to do.....mixing an epoxy with sand. I'm not sure of the mixture.....
 
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JohnJL

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Joined
Jul 28, 2010
Messages
150
Location
Toronto
The prep was 3 days and the actual pour took 2 hours...am off ona business trip now but will snap pics when I'm back. Its all under tarps now with the wifey squirting it down twice a day.
 
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