cutting concrete to a curve

[structSU10]

Looking into any possible way to cut back a cantilever concrete slab to a defined compound curve within a reasonable tolerance. The concept would be to allow a new facade wall to bypass the cut slab edge.

I have seen thermal lancing and hydro demolition may be options but was unsure if either have a tight enough tolerance (+/- 1" or so). My other thought was to demo more than required and recast to the desired curve. If it were possible in one go I would imagine its cheaper but maybe its asking too much.

 

[jayrod12]

It's messy business but I've seen guys work magic with a grinder. So cut it close with a chop saw and then butter the edge to the final profile with a grinder.

 

[human909]

Overlapping core drilling can work and can be a reasonable start. A +/-1" tolerance isn't too onerous. Of course you'll need some secondary finishing, if you can do it using a grout or another additive method then you can get something reasonably suitable especially if you use smaller size core drill.

 

[DBronson]

structSU10:

I've seen discussions of "portable" water jet cutters This would be you best bet if the process is truly portable. Another option is wire saw. The quarrying industry uses these. They make smaller portable units that would work for that. Here's an example: Link

Regards,

DB