Another lumpy/wavy slab question - grinding?

[ConCretin]

Laser Grinder® XPT - Concrete Grinding Ltd

Laser Grinder® XPT, upgrading industrial floors to ultraflat floors to exceptionally tight tolerances; far exceeding the limits of current international standards.

concrete-grinding.com

Superflat Laser Grinding - CoGri USA INC

The Laser Grinder® has been specifically developed to operate in a working warehouse environment, with minimal interference to a client’s ongoing operation. The wet, vacuum-enclosed grinding process is free from airborne dust and is clean enough to work alongside fully stocked racks – even in...

cogriusa.com

Yup. I did a Google search and found the same things. There goes my private island, yacht and helicopter. I pictured something like those Rumba automatic vacuums that run around your house cleaning your floors. It would make one pass to measure the bumps and then grind them smooth. I guess it's a bit more complicated than that. lol

 

[bluedog225]

Curious for a ballpark on what this is going to cost. I’ve got some issues on my pour as well.

 

[tinyrobotman]

Curious for a ballpark on what this is going to cost. I’ve got some issues on my pour as well.

Will post when I have an estimate. Just FYI I'm not getting robot grind, just a guy with a big machine.

 

[lovetap]

Any update on this? I poured part of my garage yesterday, 640 SQ ft and we ended up with one significant high spot in an 8x6' area 5/8 higher than the lowest spot. This was a DIY job poured within a heated building, but it was -12F outside temperature which caused a dense fog cloud indoors and we couldn't see the laser level. Probably occured because it was the furthest point from both ends for the bull float. You get what you pay for, and in this case it was just the cost of concrete. Reading other posts leads me to believe renting an EDCO or similar grinder would be an exercise in futility.

I think putting the rental costs towards therapy might be my best option.

 

[john.k]

If you demand documented exact flatness,you might find no one will touch the job.......all these guys have been burned in the past by impossible specs in written contracts.

 

[PT Doc]

Sounds like the floor grinder will leave you with a nice flat and good looking floor.

 

[Caa311]

I have a crappy floor in my shop. It's 25 x 25, looks like they screeded it with a 2x4 and stopped every couple feet and left a low spot. Anyway I have a 14 ft aluminum straight edge and I marked the high spots with a pencil then ground them down with a 9 inch grinder. Haven't finished it yet but just smoothing out the high spots makes my feet feel better when I'm walking on it.