How to grind raised edge of concrete slab?

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Old 03-29-17, 06:29 PM
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How to grind raised edge of concrete slab?

I've got a 5 foot long slab that's angled up by about 1" relative to its neighbor, and I'd like to grind down that raised edge. What are my reasonable options for doing this? Can it be done with a hefty angle-grinder, with what kind of wheel? Do I need to call in the big guns and rent a gas-powered concrete grinder or planer?
 
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Old 03-29-17, 07:03 PM
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A diamond cup on an angle grinder would melt that lip away. I've even used the slightly cup shaped regular grinding wheels but it would be slower. I have a 4" diamond cup and use a shop vac and a hood I created to control the dust. I'm knocking off the form ridges on my foundation walls before attaching rigid foam. Only problem is the frequent need to clean the filter on the vac.

Bud
 
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Old 03-29-17, 07:05 PM
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An angle grinder with a diamond cup wheel will take down concrete, it just might take a while. You might want to cut it down with a diamond blade first. (no sound for the first 24 sec.)

https://www.youtube.com/watch?v=IZO8jxKyddM
 
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Old 03-30-17, 09:10 PM
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Wow, dude should really be wearing a dust mask! Anyways, really helpful video; thanks. I don't know anything about diamond grinding wheels/cups ... is there anything in particular that I want to make sure that I get when shopping for it?
 
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Old 03-31-17, 04:56 AM
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He is wearing a dust mask.

Tools like those can be rented.

After this operation I would think a concrete filler or patch would be applied to the crack.
 
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Old 03-31-17, 05:09 AM
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The dust IS a pain and in addition to the mask I would move the van. A shop vac can capture a lot of that dust.
I have the 4" cup, less expensive, but does a great job. Depending upon gow much you need to grind the diamond saw to take off the lip is good as well.

I went to Harbor Freight for my cup but all a big box should have one, not always.

Bud
 
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