Need advice on how to do some concrete patching

[Asian_defender]

Is anyone able to give me some advice on how to do a vertical patch?
It's a small job so no one wants to come out and do it. I tried to patch it last year but obviously I'm shitty at it lol

Concrete guys feel free to chime in

[Jeeper1986]

chip as much loose concrete as you can from the area, get a normal concrete bag that doesn't have the gravel in it just the sand and concrete, get a paint brush soak it with water and spray the area that needs to be covered, spread the concrete where is needed and then wet the brush again and brush the concrete to blend it in. let dry and you should be golden

[LLLimit]

Any new cementious material will stick but won't ever fully integrate into the existing concrete, and will always remain a cold joint. This patchwork will loosen & chip off at every winter cycle.
Also probably not a good idea to chip away anything large, or you'll reveal your rebar and kick off some oxide jacking when metal hits moisture & starts to rusts.
That's probably your garage interior gradebeam/wall isn't it, closer to the overhead door, and where water/slush pools in winter?


Theory time, because I use to teach this at SAIT & work at a plant: If I remember correctly - typically, by design, these walls & gradebeams are some 20MPA concrete and not air-entrained = this concrete cannot resist internal pressures generated by water when it's fully saturated and consequently freezing; because water expands when it freezes. There's nothing wrong with this concrete in theory, but in this real life application it's seeing complete saturation and freezing rather than being isolated from either scenarios. Water will also be drawn up the wall by capillary action, so you'll see some disintegration a couple inches above where the water pools.
So in this scenario:
-frozen dry concrete = ok
-saturated unfrozen concrete = ok
-saturated freezing & thawing concrete = bad

Real life time, because it happened to me when in moved into my place several years ago: I noticed some material loss but it really ramped up right after @AndyL put in a new garage door. The nice new seal stopped any moisture from exhausting and would freeze over at -20C. I lost up to 1/2" of wall depth, over the height of the gradebeam, and back up to 2' in length, with some large aggregate loss but no rebar exposure though. It gets pretty bad because the frost travels so far from the door.

I'll grab some pictures later w/ the product I used.
It was an ugly-ugly-ugly fix because I don't have tools, practical experience or patience like industry guys, but it works because frozen dry concrete = ok

[Asian_defender]

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That's probably your garage interior gradebeam/wall isn't it

Ding

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closer to the overhead door

Ding

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where water/slush pools in winter?

Ding

Looks like I am not the only one with this issue, as much as I try to keep the garage floor dry during the winter I can't seem to stop it. This is my second patch and its not getting any better.
I would glady pay someone to come do it but the job is too small. Most of the guys even on kijiji or facebook (I know) say its too small of a job

[LLLimit]

Rustoleum EPOXYSHIELD Concrete Patch and Repair
This is mean for flat work, but I needed something that stuck to the wall but also spreadable. It permanently bonds to concrete and dries rock solid.
Couple wipes with the squeegee helps too

Lack of work ethic, motivation & determination aside, it was a bit tough because the mixture was heavy & ultra sticky - every time I applied and tried to spread, I was pulling off cement & aggregate. Like trying to spread chunky peanut butter on crusty dried bread, on the wall. I ended up layering on thick at the top and letting gravity do the job and pushing into holes with a bit of trowel work. Being right handed and squatting in that tight corner didn't help either.

If the wall wasn't so fragile with deep holes, I could have easily spread it thin with a trowel and made a nice finish.

https://imgur.com/a/MDkpbFr

In your case, I would probably, gently pull out patchwork #1 and #2. It's not really useful because it's never formally made a bond and your material loss doesn't look that deep.

[Asian_defender]

Thank you very much!!!

[rage2]

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Rustoleum EPOXYSHIELD Concrete Patch and Repair
This is mean for flat work, but I needed something that stuck to the wall but also spreadable. It permanently bonds to concrete and dries rock solid.
Couple wipes with the squeegee helps too

Lack of work ethic, motivation & determination aside, it was a bit tough because the mixture was heavy & ultra sticky - every time I applied and tried to spread, I was pulling off cement & aggregate. Like trying to spread chunky peanut butter on crusty dried bread, on the wall. I ended up layering on thick at the top and letting gravity do the job and pushing into holes with a bit of trowel work. Being right handed and squatting in that tight corner didn't help either.

If the wall wasn't so fragile with deep holes, I could have easily spread it thin with a trowel and made a nice finish.

https://imgur.com/a/MDkpbFr

In your case, I would probably, gently pull out patchwork #1 and #2. It's not really useful because it's never formally made a bond and your material loss doesn't look that deep.

I used this shit 7 years ago at the rental on the entrance steps. Can vouch it works.





I literally covered the whole fucking thing with it haha. Some of the steps was missing huge chunks too.

[dirtsniffer]

I'm having the same problem.. probably need to deal with it before the winter. Any other suggestions?

[SJW]

I did my house last year before I sold it. Now my new house is doing it. So I’ll do mine soon. It’s also beside garage door. I just buy a parging mix, clean the area then cost with this glue shit. Then mix parge until it’s thick but spreadable. Looks decent.

[ExtraSlow]

What parging mix do you buy and where? I need some.

[JRSC00LUDE]

MG Krete may also be a good product, it is two component.

[SJW]

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What parging mix do you buy and where? I need some.

This is what I used. https://www.lowes.ca/product/concret...ging-mix-52450

If you want to borrow my trowels n buckets instead of buying you're more than welcome.