Jesse Ransom (FFS)
Jesse Ransom (FFS) UltimaDork
10/22/20 7:33 p.m.

TL;DR: I have a guess in the last line below, but if anybody knows better, I'm all ears.

I may have my terminology wrong, but when I say "thinset" I mean the thin, little-or-no-aggregate stuff you'd use to level a subfloor before applying linoleum or something like that...

My dad has a concrete porch that's sagged and cracked, and has been foam-jacked back into generally reasonable location and shape, but has a triangular section that's a bit low at least along one edge. As I understand it, it's just the sort of shape you'd correct with thinset, except that thinset isn't durable or resilient enough to be a top layer, esepcially where it's feathered out thinly (and as far as I know doesn't bond super-strongly to whatever it's on top of).

I wonder about something like this concrete resurfacer, but I imagine it's really meant as a topcoat, not for building up even a small self-supporting thickness.

Or maybe I have "thinset" really, really wrong; Quikrete appears to have a version which includes sand; I wonder whether this with some of the acrylic fortifier would do the trick... Wait, nope, it's definitely advertised as a tile setting mortar, not a structural item unto itself...

Okay, maybe I've rambled my way there as I go through the site. Vinyl Concrete Patcher? Good for up to 1/4" thick...

Apexcarver
Apexcarver UltimaDork
10/22/20 7:45 p.m.

Watching with interest.  Have some pavement to fix too.

jgrewe
jgrewe Reader
10/22/20 10:35 p.m.

Ardex makes some pretty amazing stuff. Its been 15 years since I was in the concrete industry so I'm not sure exactly which of their products would be best for your job.

https://www.ardexamericas.com/products/engineered-concrete-repair-systems/

 

Jesse Ransom (FFS)
Jesse Ransom (FFS) UltimaDork
10/26/20 1:35 p.m.

Looks like Ardex makes a couple of things that are good down to 1/4" and look promising; I'll have to check; hopefully either the deep end is 1/4" or less and the Quikrete vinyl concrete patcher will work, or the shallow end is 1/4" or more and the Ardex CP or K 301 will work... cheeky

Jesse Ransom (FFS)
Jesse Ransom (FFS) UltimaDork
10/26/20 2:03 p.m.

Well heck; Sakrete Flo Coat is good for feather edge to 1/2"... I think that must be our ticket?

Good grief; I like to cite my sources when asking for advice, but at this point I look like some sort of concrete canoe...

jgrewe
jgrewe Reader
10/26/20 4:36 p.m.

Some of the Ardex stuff can have 3/8" rock added to it for thicker applications and then left out of it to feather it out. How thick are you expecting at the deepest part?

Jesse Ransom (FFS)
Jesse Ransom (FFS) UltimaDork
10/26/20 5:13 p.m.

In reply to jgrewe :

I'm actually not entirely sure; I'll have to double check. I have sort of a mental picture of the situation, but I don't recall whether we discussed the absolute depth of the deep end...

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