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Old 10-01-2012, 06:58 PM   #1
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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?

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Old 10-01-2012, 07:19 PM   #2
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Cutting concrete expansion joints


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).

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Old 10-01-2012, 07:33 PM   #3
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Cutting concrete expansion joints


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Originally Posted by Phuffman View Post
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??
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Old 10-01-2012, 07:39 PM   #4
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Cutting concrete expansion joints


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.
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Old 10-01-2012, 10:44 PM   #5
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Cutting concrete expansion joints


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.
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Old 10-01-2012, 11:34 PM   #6
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Cutting concrete expansion joints


Quote:
Originally Posted by Phuffman View Post
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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