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-   -   Cutting concrete expansion joints (http://www.diychatroom.com/f105/cutting-concrete-expansion-joints-158618/)

Phuffman 10-01-2012 05:58 PM

Cutting concrete expansion joints
 
What type of blade should I use to cut expansion joints in already hard cured sidewalk? I've tried 2 types that didn't work.

Skill-saw or angle grinder?

Depth?

Wet it dry?

jomama45 10-01-2012 06:19 PM

Diamond blade.

Either a Skil-saw or grinder will work.

Dry is easier.

Cut them as soon as possible, stop and wait if there's severe unraveling (chipping).

Canarywood1 10-01-2012 06:33 PM

Quote:

Originally Posted by Phuffman (Post 1021454)
What type of blade should I use to cut expansion joints in already hard cured sidewalk? I've tried 2 types that didn't work.

Skill-saw or angle grinder?

Depth?

Wet it dry?


Diamond blade for sure, depth is 1/4 of the thickness,how many running feet do you have to do??

Daniel Holzman 10-01-2012 06:39 PM

When cutting concrete with a diamond blade, be sure to wear a NIOSH approved mask, as concrete dust is extremely bad for your lungs, and you are going to generate a lot of dust during the cut. Use of water reduces but does not eliminate the dust.

Phuffman 10-01-2012 09:44 PM

I've got 3 separate cuts at 3' per cut. Not much to do, really, but frustrating that I can't get a blade to work out right and just cut.

epson 10-01-2012 10:34 PM

Quote:

Originally Posted by Phuffman (Post 1021454)
What type of blade should I use to cut expansion joints in already hard cured sidewalk? I've tried 2 types that didn't work.

Skill-saw or angle grinder?

Depth?

Wet it dry?

for your information: http://www.youtube.com/watch?v=_PZx9...eature=related


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