Posted by
Message
Purpleblooded
LSU Fan
Member since Dec 2019
90 posts

DIY cutting cement
How hard is it to cut cement with circular saw? Have a slab with a gutter down spout going to it. Thinking of cutting the slab to place piping for a drain To go under ground to ditch. Have 12’ of concrete that I would cut a section to lay pvc to run to ditch.


Emteein
LSU Fan
Baton Rouge
Member since Jun 2011
2562 posts

re: DIY cutting cement
Rent a demo saw And hook your water hose to it. It will work much better, and take a lot less time.





Replies (0)
Replies (0)
90
lnomm34
LSU Fan
Louisiana
Member since Oct 2009
11412 posts

re: DIY cutting cement
quote:

Have 12’ of concrete that I would cut a section to lay pvc to run to ditch.


Oof. Even with that concrete saw, cutting 24’ (you’ll have to cut both sides, right?) of concrete and then removing that section will not be fun.

Maybe rent the saw and a jackhammer to bust the section out after you cut? I just removed a shite ton of concrete a few weeks ago and I’ll tell you that the concrete saw is a sonofabitch to use if you’re like me and not used to using it.
This post was edited on 6/28 at 7:04 pm


Replies (0)
Replies (0)
00
Aristo
LSU Fan
Baton Rouge
Member since Jan 2007
11550 posts
 Online 

re: DIY cutting cement
How thick? I used a cordless 18v circular saw to cut a small drainage channel in my patio a few years ago and it cut like butter.


Replies (0)
Replies (0)
00
skidry
LSU Fan
Member since Jul 2009
1789 posts

re: DIY cutting cement
This will boil down to whether you have limestone or river gravel. Limestone will cut like butter, river gravel will be much much harder.


Purpleblooded
LSU Fan
Member since Dec 2019
90 posts

re: DIY cutting cement
4” thick.


bee Rye
Chicago Cubs Fan
New orleans
Member since Jan 2006
31725 posts

re: DIY cutting cement
I need to cut my sidewalk, 3 straight lines of 3’ at a 4” depth. I plan on renting one of the walk behind concrete saws for the job


Replies (0)
Replies (0)
00
MoarKilometers
Florida Atlantic Fan
Member since Apr 2015
8530 posts

re: DIY cutting cement
quote:

4” thick.

So you think you can cut through 4 inches of concrete with a 7 1/4 inch blade??? I don't think that's how radius measurements work.


TD SponsorTD Fan
USA
Member since 2001
Thank you for supporting our sponsors
Advertisement
LSUengr
LSU Fan
Baton Rouge
Member since Sep 2005
1360 posts

re: DIY cutting cement
quote:

So you think you can cut through 4 inches of concrete with a 7 1/4 inch blade??? I don't think that's how radius measurements work.


You don't have to cut thru the whole 4". If you get at least 2.5"-3" deep, you can break it at the cut with a sledge hammer. I have done sidewalks replacement in front of my last 2 houses with this method. Same thing will work here.


baldona
Auburn Fan
Florida
Member since Feb 2016
12383 posts

re: DIY cutting cement
FYI when you rent one you have to buy the blade usually. As said for 24’ rent the one on wheels you just pull. Make sure you get the best thing they have it’ll be worth the extra couple bucks


Brian Wilson
Houston Astros Fan
Member since Mar 2012
1854 posts

re: DIY cutting cement
Couple of tips.

Make sure you get a concrete demo saw with a water hookup. You must use water as to not burn up the blade and to cut down on the fine dust that is generated. It's not a hard process but you should do some research/reading/youtube-watching to educate yourself.

Cut full depth and then use a hammer drill or demo drill to break up all the concrete to remove it. It will be heavier than you think.

Make sure you protect yourself and call 811 to have any utilities marked as well.


Replies (0)
Replies (0)
30
Aristo
LSU Fan
Baton Rouge
Member since Jan 2007
11550 posts
 Online 

re: DIY cutting cement
quote:

FYI when you rent one you have to buy the blade usually.


It is cheaper to buy the blade than what they will charge you for use of their blade.


Replies (0)
Replies (0)
00
keakar
Member since Jan 2017
14563 posts
 Online 

re: DIY cutting cement
those blades on circular saw only cut 3.5" max at the most if 7" blade. they are great for cutting sidewalks and driveways that are 3-4" thick at the most.

this is a job best to pay someone else to do rather then hurt yourself with a large very very dangerous saw that can and will jump back on you and cut you in half if you dont know how to control it
This post was edited on 6/29 at 4:25 pm


Replies (0)
Replies (0)
30
Libertariantiger
LSU Fan
Member since Nov 2012
945 posts

re: DIY cutting cement
12ft I would do a walk behind saw and try to pop it up from the open end and work to the house. I would cut all the way through it.
If it has driveway wire in it you are fricked. It will take 3x as long.


Replies (0)
Replies (0)
10
MoarKilometers
Florida Atlantic Fan
Member since Apr 2015
8530 posts

re: DIY cutting cement
quote:

You don't have to cut thru the whole 4". If you get at least 2.5"-3" deep, you can break it at the cut with a sledge hammer. I have done sidewalks replacement in front of my last 2 houses with this method. Same thing will work here.

I've destroyed more driveways and sidewalks than I care to recount. Murphy's law and wire mesh is bound to butt frick you when you least expect it. I say this as someone who owns an 85 lbs breaker hammer and a concrete saw that will cut through a CMU in 1 pass. I've found #5 rebar in places you would never suspect it to be


Replies (0)
Replies (0)
20
deanwelles
LSU Fan
EBR Parish Prison
Member since Mar 2008
118 posts

re: DIY cutting cement
Two thoughts:
I have done what you're thinking of doing with a circ saw and one of those masonry blades. It was only about three feet and worked well. There was no rebar. The blade cut it really well, but didn't go through all the way. It basically scored it, so I busted it out with a 33lb jackhammer.

My second thought is probably not applicable, as it sounds like this isn't a driveway, but this was an interesting method I saw on YouTube:
run pipe under concrete using pressure washer


Replies (0)
Replies (0)
00
Macfly
LSU Fan
BR & DS
Member since Jan 2016
2992 posts

re: DIY cutting cement
This rig is available at rental stores.
It has a water hook-up and I suggest scoring the concrete instead of trying to do a single deep cut.



Replies (0)
Replies (0)
00
first pageprev pagePage 1 of 1next pagelast page
refresh

Back to top

logoFollow TigerDroppings for LSU Football News
Follow us on Twitter, Facebook and Instagram to get the latest updates on LSU Football and Recruiting.

FacebookTwitterInstagram