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How do I deal with this concrete crack?
Posted by: space-time
Date: May 25, 2014 02:09PM
seems like someone tried to fill it with some white stuff at some point, but the crack got longer/wider and there are some additional holes. Short of pouring new concrete, what could I do? I want to make it looks nicer. I am thinking to cover everything with new tiles. is that a bad idea?

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Re: How do I deal with this concrete crack?
Posted by: steve...
Date: May 25, 2014 02:36PM
I'm pretty sure I saw something at Home Depot that was made to fill cracks in concrete. If I'm not mistaken, it was in the adhesive/calk section. You will probably need to clean out the crack as best you can (scrape and vacuum).





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Re: How do I deal with this concrete crack?
Posted by: fauch
Date: May 25, 2014 03:06PM
Duct Tape?
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Re: How do I deal with this concrete crack?
Posted by: space-time
Date: May 25, 2014 03:11PM
Quote
fauch
Duct Tape?

Thanks, that's what you do over there?
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Re: How do I deal with this concrete crack?
Posted by: Filliam H. Muffman
Date: May 25, 2014 03:26PM
I have suffered with somewhat similar concrete over the years. Other than buying bulk pack of masonry cutting blades and a cheap circular saw that you plan on ruining, every other solution I know of takes a months worth of weekends and offers very little long term benefit.



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Re: How do I deal with this concrete crack?
Posted by: WHiiP
Date: May 25, 2014 03:35PM
Tiles on top of concrete is simply a very bad idea. The concrete will continue to crack and then the tiles over the cracks will crack.That is why they remove the concrete when they put pavers in for a driveway.



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Edited 1 time(s). Last edit at 05/25/2014 03:36PM by WHiiP.
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Re: How do I deal with this concrete crack?
Posted by: billb
Date: May 25, 2014 03:43PM
Without knowing why it is cracking, I'd remove the rubbery looking goop from the previous attempt , flood the crack with copious amounts of water to remove any loose material and then while still soaking wet stuff as much portland cement mix into the crack as I could . Push it in with sticks. Popsicle sticks, whatever. A couple different sizes ( got any shingles lying around for pieces ?) will come in handy.
Kinda like doing grout or re-mortaring bricks.
By rights, the best way is to undercut a large crack and then stuff it.

I've also swept dry fine cement into a hairline crack and then kept it wet ( like grass seedlings) for a week.
That was a cement cured too quick crack, so there was no subsequent movement to open it up again.



That might not be stable enough for tiles. At least not knowing why it is cracking.



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Edited 1 time(s). Last edit at 05/25/2014 03:44PM by billb.
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Re: How do I deal with this concrete crack?
Posted by: GGD
Date: May 25, 2014 03:54PM
I've noticed when shopping at Costco that they seem to fill cracks in their polished concrete warehouse floor with some sort of epoxy.
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Re: How do I deal with this concrete crack?
Posted by: Filliam H. Muffman
Date: May 25, 2014 04:54PM
Quote
GGD
I've noticed when shopping at Costco that they seem to fill cracks in their polished concrete warehouse floor with some sort of epoxy.

That works really well with a slab that has two (or more) layers of rebar stabilizing the slab across the crack. Not so great for driveways with at most a thin wire screen.

space-time, if you have free space to the side of the driveway that is again as wide as the driveway, it might be possible to kludge up a miniature concrete injection rig. Get a 2" pipe a few inches longer than the length of the crack. Force it under the driveway along the crack, then pump in concrete until it fills the crack from the bottom and keep doing it as you pull the pipe out.

Still, as bill said, you really should figure out why it cracked in the first place.



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Re: How do I deal with this concrete crack?
Posted by: space-time
Date: May 25, 2014 05:05PM
This is not driveway, it is on the back yard so I wanted to put tiles to make it look better. It is 25 year old
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Re: How do I deal with this concrete crack?
Posted by: Racer X
Date: May 25, 2014 05:08PM
There are 2 types of concrete slabs, cracked ones, and those that haven't cracked yet.
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Re: How do I deal with this concrete crack?
Posted by: Filliam H. Muffman
Date: May 25, 2014 05:08PM
Another idea that just popped in to my head. Since you are only looking to make the surface look better, you could lay down a thin layer of asphalt over the entire walkway, using a 12" wide sheet of 16 gauge stainless steel across the crack. The asphalt will still likely crack in about the same place, but it will be easier to patch.

Not a great solution. Not cheap, easy, or reliable, and some people don't like the look of asphalt. It can be painted to reflect the sun but that does not last very long unless the "paint" is the vinyl stuff they use for lane striping.



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Edited 1 time(s). Last edit at 05/25/2014 05:09PM by Filliam H. Muffman.
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Re: How do I deal with this concrete crack?
Posted by: wolfcry911
Date: May 25, 2014 06:24PM
If the crack hasn't worsened recently you may get away with tiling over a decoupling membrane like Ditra
[www.schluter.com]
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Re: How do I deal with this concrete crack?
Posted by: BernDog
Date: May 25, 2014 06:30PM
I remember seeing something once where a professional crew would come in and paint very realistic looking stones on your concrete. They would match the stone pattern to existing cracks and they were very well camouflaged. I saw it done on a driveway and front walk, but a back patio might be even more appropriate. Probably not cheap, though, and you'd have to find someone doing it in your area.

The options I'd look at would be to either fill it with something made for that purpose (something with more elastic give would probably last a little longer than a concrete-only type of patch...assuming the crack will continue to spread), or to have the slab removed and replace it with pavers. In my personal financial situation, I'd be filling some cracks. YMMV.
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Re: How do I deal with this concrete crack?
Posted by: Grateful11
Date: May 25, 2014 06:30PM




Grateful11
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Re: How do I deal with this concrete crack?
Posted by: Lizabeth
Date: May 25, 2014 06:30PM
Why not fill the crack as mentioned above (concrete or epoxy type stuff) and the used the snap tiles for outdoor patios that would float on top?
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Re: How do I deal with this concrete crack?
Posted by: space-time
Date: May 25, 2014 07:00PM
Thanks for the ideas. I should mention that I like to power wash this once or twice a year. The crack was already there, when I wash I try to avoid making additional damage.
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Re: How do I deal with this concrete crack?
Posted by: cbelt3
Date: May 25, 2014 07:34PM
Cracks allow water to enter. Water freezes and expands. Then the crack is bigger. And so it goes. I've filled similar by using a grinder and a diamond blade and then an air chisel to clean it out. Then cleaned it, painted concrete "glue" stuff , and then poured in more concrete. Works for a few years.
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Re: How do I deal with this concrete crack?
Posted by: space-time
Date: May 25, 2014 07:40PM
Cracks allow water to enter. Water freezes and expands. Then the crack is bigger. And so it goes.

I guess a heated patio would be a solution? LOL

maybe I should spend $$$$ and get a deck
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Re: How do I deal with this concrete crack?
Posted by: Rick-o
Date: May 25, 2014 08:59PM
Cover it with solar road panels.

[www.solarroadways.com]



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Re: How do I deal with this concrete crack?
Posted by: iaJim
Date: May 25, 2014 09:33PM
I would think that a flexible filler would be your best bet. That's what they use on streets and highways. That way the filler would flex with the movement of the cracked slab. Nothing fixes it.
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Re: How do I deal with this concrete crack?
Posted by: The UnDoug
Date: May 25, 2014 09:50PM
"How do I deal with this concrete crack?"

Put it in your concrete crack pipe and smoke it! Duh!



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Re: How do I deal with this concrete crack?
Posted by: Michael
Date: May 26, 2014 07:04AM
Quote
Lizabeth
Why not fill the crack as mentioned above (concrete or epoxy type stuff) and the used the snap tiles for outdoor patios that would float on top?

This.

Here's one option: [www.amazon.com]
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Re: How do I deal with this concrete crack?
Posted by: GuyGene
Date: May 26, 2014 10:23AM
Quote
Racer X
There are 2 types of concrete slabs, cracked ones, and those that haven't cracked yet.

agree smiley agree smiley

Yep, that's concrete. It WILL crack. If it's been there for 25 years, I think you might be able to use tile on it. Seal it up good as suggested somewhere above first.



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Re: How do I deal with this concrete crack?
Posted by: bruceko
Date: May 26, 2014 02:08PM
Is it an exterior crack?
If so it was either caused by settlement or not having proper control joints cut in the slab to allow expansion or contraction.
I the crack is still moving if you put an epoxy in it will just develop a new crack next to the old one.
A flexible caulk like a polyurethane will prevent water from getting under the slab but won't stop movement and a crack could develop through your tile.
The joints at Costco or any other large warehouse are put in predetermined
expansion joints and saw cut joints to prevent random cracks.
They use either a semiflexible epoxy(not very flexible) or a polyurea sealant that allows more movement.
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Re: How do I deal with this concrete crack?
Posted by: mattkime
Date: May 26, 2014 04:12PM
my personal take on cracked concrete is to simply ignore it as long as there aren't any structural problems. i've never understood why people get bent out of shape over cracked concrete (as long as its not recent....) if thats the worst of your problems then you're doing very well..



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Re: How do I deal with this concrete crack?
Posted by: Speedy
Date: May 26, 2014 05:08PM
Outdoor carpet over it.



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