All Things Gardening forum: concrete repair...

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Name: UrbanWild
Kentucky (Zone 6b)
Kentucky - borderline of 6a & 6b
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Oct 30, 2017 9:18 AM CST
I know this might seem weird in a gardening forum, but I treat the whole property as a garden. I have the street sidewalk to the front, one that runs from the street sidewalk to the front steps, and another that runs from the street sidewalk all the way through the yard to they alley out back. Over the years we have a lot of cracks...some have been allowed to grow.

I am looking for input on concrete crack repair. Years ago, I used three highly touted crack repairs. Two were powder, just add water types and one a liquid prep. Fast forward and they started showing problems in a year. Now the cracks are as bad or maybe worse than before. Now, I have several in sidewalks at my place but would like to deal with those at my folks' house as well.

So, I am hoping there may have been some advances in materials and there is a good, long-lasting product now available for concrete crack repairs. Thoughts? Thanks for any info and your time.
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Name: stone
near Macon Georgia (USA) (Zone 8a)
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Oct 30, 2017 9:38 AM CST
Was working on a driveway this summer, where a saw was rented, straight lines were cut, then concrete and tree roots removed, new concrete poured in those sections.... Looks really good!

Usually concrete cracks due to stresses. Add a bit of patch to the cracks without changing the stressors, expect the cracks to reappear.

Of course, even in the repaired drive, those trees will grow new roots, and the drive will crack again.... But prolly not immediately.
Name: greene
Savannah, GA (Sunset 28) (Zone 8b)
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Oct 30, 2017 10:26 AM CST
I had seen a product but have not yet tried it. You can watch YouTube videos and check reviews, but I think it looks good. It's called Pli-Stix. Here is one YouTube for (in my opinion) how not to use the product.

They make it way more difficult than necessary. Firstly, I would not abuse my flat head screwdriver; a better tool might be the spline roller as I use to do window screen repair.

Secondly, the torch they use in the video creates even more work and backaches. There is a torch folks use to burn weeds. That would do the trick plus you could stand up to get that part of the job done. Here are some reviews where folks say it is good for cracks 1/4 to 1/2 inch:

I agree I agree that roots are a major cause of cracks, but not the only cause. Are there control joints in the existing sidewalk? (I helped my dad make those cuts when he made our sidewalk.- It was exciting to be able to help - I even got to screed the entire basement floor at age 7; child labor was alive and well back then. Whistling ) The newer concrete mixes tend to have admixtures/fillers to help prevent cracks. Plus, some older sidewalks were installed without the addition of steel mesh metal reinforcement. Replacing an entire sidewalk is a high cost, high man-hour project; you might consider dividing the job into manageable sections and replace one section each year until the sidewalk is up to your standards.

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Name: Teresa
Indiana (Zone 5b)
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Oct 30, 2017 5:56 PM CST
I didn't read all your posts above, but since I make hypertufa, both regular and cloth and cement, when I make the almost straight portland (which of course only comes in 94 pound bags) I pour leftovers into my sidewalk holes and cracks. But it's only started this year. Looks good. But will it hold up long ??
. . . it's always better to ask questions, than jump to conclusions.
AND . . . always hear both sides of the story before making a judgment.
Name: Philip Becker
Fresno California (Zone 8a)
Oct 31, 2017 10:54 AM CST
Look for concrete adhesive.
Anything i say, could be misrepresented, or wrong.
Minnesota (Zone 3b)
Nov 3, 2017 1:19 PM CST
Depending oh how your ground reacts to water, does it freeze down there, the only way that lasts more than a few years is either replacement, or pouring a new sidewalk over the old.
I dealt with trying to fix cracking and pitting sidewalks for years and finally just quit.
Some of the patches that lasted longer looked really ugly after drying getting worse with time but most just were not worth the effort.

Now up here ground freezes, i.e. bulges, settles, bulges, settles... once cracked it will only get worse over time, although some cracks took years before they were more than just a crack.
Name: Yardenman
Maryland (Zone 7a)
Nov 7, 2017 5:10 AM CST
If the concrete is separating because of ground collapse or sinking, there isn't much you can do but keep filling it. And that can work pretty well.

I have the front steps slowly sinking. In 25 years they dropped 10". I had a contractor box the top and add 10" of concrete. It is a "temporary" fix probably good for 10 years.

On the other hand, I will probably still be here in 10 years. But I did it so my mother could get into the house and she is gone now. *I* can make the slight step easily.

Name: Rj
Just S of the twin cities of M (Zone 4b)
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Nov 11, 2017 8:49 AM CST
Thumb of 2017-11-11/crawgarden/4801fd

Works great!

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springfield MO area (Zone 6a)
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Nov 12, 2017 5:15 PM CST
Concrete once it develops cracks, water gets into the cracks and in the winter it will freeze -expanding/ and busting it out even worse. You need a flexible type concrete repair like a caulk like product, it is is a tube and you just pipe it in. Go to Lowes or Home Depot, and find someone that looks like they been around a while... ask for help!

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