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Started By
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DIY cutting cement
Posted on 6/28/20 at 6:27 pm
Posted on 6/28/20 at 6:27 pm
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.
9
Posted on 6/28/20 at 6:59 pm to Purpleblooded
Rent a demo saw And hook your water hose to it. It will work much better, and take a lot less time.
Posted on 6/28/20 at 7:02 pm to Purpleblooded
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 6/28/20 at 7:04 pm
Posted on 6/28/20 at 7:06 pm to Purpleblooded
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.
Posted on 6/28/20 at 7:10 pm to Purpleblooded
This will boil down to whether you have limestone or river gravel. Limestone will cut like butter, river gravel will be much much harder.
Posted on 6/28/20 at 9:02 pm to skidry
4” thick.
Posted on 6/28/20 at 9:11 pm to Purpleblooded
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
Posted on 6/29/20 at 8:08 am to Purpleblooded
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.
Posted on 6/29/20 at 8:32 am to MoarKilometers
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.
Posted on 6/29/20 at 10:11 am to LSUengr
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
Posted on 6/29/20 at 10:51 am to Purpleblooded
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.
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.
Posted on 6/29/20 at 12:48 pm to baldona
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.
Posted on 6/29/20 at 4:20 pm to Purpleblooded
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 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 6/29/20 at 4:25 pm
Posted on 6/29/20 at 4:35 pm to Purpleblooded
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.
If it has driveway wire in it you are fricked. It will take 3x as long.
Posted on 6/29/20 at 9:16 pm to LSUengr
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
Posted on 6/30/20 at 1:39 pm to Purpleblooded
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
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
Posted on 6/30/20 at 3:14 pm to Purpleblooded
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.
It has a water hook-up and I suggest scoring the concrete instead of trying to do a single deep cut.
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