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Grinding Concrete

S

Sparktrician

Member
Seems awhile back there was someone wanting to know how to level off or smooth existing concrete....There is a way. I have used it. Two options....depending on how much you have to do.

1) a 7" diamond blade cup on a 9" grinder....you are on your hands and knees....and eat dust...even with a mask on

2) a walk behind contraption that I understand is made by Husquavara. has a 2hp 120V motor, and changeable diamond bits. It will cut it down and level it out.

The handheld cuts more off faster, but harder to control.
The walkbehind will make a nice pretty smooth surface with minimal "rings" left afterwords.

Used these today in yet another remodel job in my shop.
 
There is also a concrete "sander" so to speak.
Works very much like a floor buffer except it has replaceable
grinding stones on the bottom about the size of the large whet
stones used for sharpening knives.
Our local rental place that rents U-haul trailers, mini excavators,
air compressors etc also rents these units out by the day. + stones.
Works great if you just want to smooth out small imperfections
like trowel marks and smooth the top surface.
It doesn't cut very much off but it is quite dusty to use.
 
LOL. A video was the last thing on my mind in the middle of the dust cloud. I have a little to do before I take it back tomorrow....I will have my apprentice take a video, and I will post it here....
 
I rent the hand held ones on occasion - but 5" cup, to rough up glazed ceramic tile so I can bond a new layer of tile over it.
If height isn't an issue it's easier, faster than chiseling up the old tile.
Agreed - BIG dust even with the adapter that hooks onto your shop vac.
 
Back in the 90's I worked for Cabela's and I run a power grinder, it had a 6 hp wisc. engine and carbide grinder wheels .(cost than to replace was $3500) I wore out several sets as we leveled settled and cracked cement on 7 warehouses, Old buildings from the closed Sioux Army Depot. . Had to level them for long tails. It had a hose attachment to run water.(NO Dust). When done running grander I put epoxy in the cracks to make a smooth surface. Epoxy cost a bunch than also.
 
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