Cutting concrete expansion joints

10-01-2012, 06:58 PM	#1
Phuffman Newbie   Join Date: Oct 2012 Posts: 2	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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10-01-2012, 07:19 PM	#2
jomama45 Concrete & Masonry   Join Date: Nov 2008 Location: Wisconsin Posts: 2,276	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).

10-01-2012, 07:33 PM	#3
Canarywood1 Member   Join Date: May 2012 Location: Sarasota,Florida Posts: 960	Cutting concrete expansion joints Quote: Originally Posted by Phuffman 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??

10-01-2012, 07:39 PM	#4
Daniel Holzman Civil Engineer   Join Date: Mar 2009 Location: Boston Posts: 3,559	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.

10-01-2012, 10:44 PM	#5
Phuffman Newbie   Join Date: Oct 2012 Posts: 2	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.

10-01-2012, 11:34 PM	#6
epson Member   Join Date: Jul 2010 Location: Ontario Canada, Toronto to be exact. Posts: 1,368	Cutting concrete expansion joints Quote: Originally Posted by Phuffman 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