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Old 02-03-2018, 09:32 AM   #31
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Re: Sidewalk replacement due to tree roots


Ayuh,...... It's Concrete,....

There's gonna be hairline cracks,... Some you'll see, others ya won't,....

To think otherwise is a fool's errand,....
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Old 02-03-2018, 07:23 PM   #32
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Re: Sidewalk replacement due to tree roots


Is this just a surface crack, or it's all the way down -- meaning, it's split already?


This is just a 6-inch wide patch. Is this patch piece going to hold in place for a good long time, or it would become a loose piece and come off in like six months to a year?

It'd become a safety hazard if that happens.


But if it's just a superficial hairline crack then I'm a lot more relieved.


I'm seeing another slightly more obvious crack along another patch location. I'll post a photo shortly.

Last edited by joemc3; 02-03-2018 at 07:39 PM.
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Old 02-03-2018, 11:17 PM   #33
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Re: Sidewalk replacement due to tree roots


The reason for all these narrow strips of patches is because of the upward pressure from tree roots under.

So I wonder how long these strips of patches will hold up now, with expected upward pressure from tree roots to continue.
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Old 02-04-2018, 06:35 AM   #34
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Re: Sidewalk replacement due to tree roots


none of us will know that answer as its your tree,,, we get this issue often - we remove the conc, chop off the tree roots, & then put in new conc,,, never would we waste time only doing 5" or 6"
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Old 02-04-2018, 12:29 PM   #35
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Re: Sidewalk replacement due to tree roots


I sent a question to Sakrete and here's what they say:

"there is nothing in our line that will make the new pour stick to the side of the old pour. A bonding agent could be used but it will not adhere the two pieces together. The new pour is going to act independently of the old pour and it will eventually crack where they come together."


This is a real helpful answer. Looks like it means the new patch will not hold up over time -- as even with bonding agent, the new concrete patch will still needs support from the bottom to help hold it to the existing concrete .

Unless there's mechanical joint like rebar, in that case it'd have been better to just redo the whole section.


(Or unless someone knows a different product that provides enough chemical bonding strength to help hold up to the existing concrete).


With this small issue, it'd have been better to just grind down the existing uneven concrete surface, or patching over the top to level out the surface. That way it does not remove needed support from the existing concrete from the bottom.


Looks like going down this route cutting out a narrow strip to make a small patch is the wrong way, with existing tree root issue, that'd push things out of the way over time.

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Old 02-04-2018, 02:51 PM   #36
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Re: Sidewalk replacement due to tree roots


Quote:
Looks like going down this route cutting out a narrow strip to make a small patch is the wrong way, with existing tree root issue, that'd push things out of the way over time.
Ayuh,.... A Patch, is a Patch, 'n will always be a Patch,....
Personally,....
I think yer expectations of what concrete is, 'n what it'll do, or not do, aren't based on the real world,....

Yer little patch might sit there just as it should for the next 10 years, or it may not,....
Livin' on the shaky-side, the patch might get blown outa that trench tomorrow in an earthquake,....
Only time will tell,....

Short of a full dig-out, 'n new replacement pour, yer patch job is just fine, for a Patch job,...
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Old 02-04-2018, 07:33 PM   #37
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Re: Sidewalk replacement due to tree roots


Never really studied much about concrete, or paid attention to concrete patch longevity and tree root's effect on it.

These sections are all within 20-40 feet of a huge sweet gum tree 75 ft tall. Just in the past 5 months I've seen one sidewalk section being pushed up by 1/8" already.

One tree root about 7" diameter has already reached within 15 feet of my house entrance -- found out when I did one patch on the concrete that close to my front door. I'm seeing a long crack along one spot of the foundation near the front door.

The concrete walkway immediatly next to the stucco wall of the garage is already pushed up by over 1/2".

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Old 02-04-2018, 07:46 PM   #38
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Re: Sidewalk replacement due to tree roots


think that's what everyone's been trying to get understood

new patch will hold up fine - even over time,,, it just won't perform as you wish using your method,,, then again, no mtl from any source would
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Old 02-04-2018, 08:27 PM   #39
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Re: Sidewalk replacement due to tree roots


I agree this is unfair.

My state recently updated the laws for these cases.

If a neighbors tree roots cause damage to your property. Such as cracked concrete. The neighbor that owns the tree has to pay for the damage.
Which makes sense when you think about it.

Makes no sense you pay for damages caused by a tree you dont own.
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Old 02-04-2018, 09:28 PM   #40
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Re: Sidewalk replacement due to tree roots


who said it was neighbor's tree ? city sidewalk & property owner's responsible per municipal law,,, if it were neighbor's tree, in most states, offended party could cut roots after legal notice to tree's owner
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