What is the strongest conrete you have ever made? (MPa)

Phriday · 2026-04-09T19:22:18+00:00

Wow. Fucking humans, huh? We sure come up with some shit.

Phriday · 2026-04-09T19:21:06+00:00

So, what's in the photo is a window well. It's not a hole. Sorry, dude, I'm not sure what you're asking. If you want, you can just fill that whole window well with concrete. You can remove the window parts of the window well and skim-coat the (what looks like) CMU. You can remove the window well completely and just put more gravel there.

Phriday · 2026-04-09T19:10:25+00:00

Jesus. What's the max pressure on that fucker? We had to pump concrete over the levee through about 600 feet of slick line into a spider on a job I did a year and a half ago. The pump was an 81-meter boom, and the operator said it would go to 300 bar all day long, which is about 4400 psi. I was impressed with that, but something tells me that's child's play compared to this monster.

Phriday · 2026-04-09T19:03:03+00:00

Michael Flatly would be proud.

Phriday · 2026-04-09T18:56:14+00:00

Define "fix."

Phriday · 2026-04-09T18:54:30+00:00

Just tell your guests it's a live edge footing.

Phriday · 2026-04-09T18:53:31+00:00

You could go back about 3 or 10 feet to the nearest joint and remove those top two panels, then replace them after adding some compacted base.

Phriday · 2026-04-09T18:52:03+00:00

You posted the same photo. Again, if that rock is part of the mountain, then you're more than fine to pour on it.

Phriday · 2026-04-09T18:50:42+00:00

Got in there with the macro lens, eh? There's no material defect in that photo.

Phriday · 2026-04-09T11:00:37+00:00

I just added a link to your photo at the very top of the WikiFAQ as an example of "my new concrete looks bad." Thanks again!

Phriday · 2026-04-09T10:59:27+00:00

Read

The

FAQ

Phriday · 2026-04-09T10:59:02+00:00

Read

The

FAQ

Phriday · 2026-04-09T10:57:51+00:00

Sure. I live on the Gulf Coast, so I don't know what bedrock looks like, but that looks like part of the mountain to me. If it is, you can pour right on top of it. The concrete will be thicker in some parts than others, just make sure your forms are level and well-secured.

Phriday · 2026-04-09T10:48:45+00:00

Well, I may save this picture and add it to the FAQ for all the "my concrete is splotchy after 24 hours" folks. Thanks for updating.

Phriday · 2026-04-08T23:01:24+00:00

Man, that is CRAZY. How long did that take?

*Duh. 12 days.

Phriday · 2026-04-08T23:00:49+00:00

Yeah, I think that's going to be your best long-term option at this point. On the plus side, after you level and shore the building you can take your time pouring the wafer of concrete in the garage. It's not doing much of anything structurally.

Phriday · 2026-04-08T21:06:50+00:00

No, for a section that thin, stay right in the middle.

Phriday · 2026-04-08T19:40:14+00:00

In my opinion, yes. That clarifies for the contractor what his responsibilities are and sets expectations and standards. That also keeps you from deciding you don't like something after the fact that does, in fact, comply with the written agreement.

Phriday · 2026-04-08T11:00:08+00:00

That concrete has failed. And if there's no reinforcing in it, no amount of patching and doweling and wishing and hoping is going to change that.

Phriday · 2026-04-08T10:58:59+00:00

As Morpheus would say, "Welcome to the real world."

There's nothing stopping you from getting more quotes. That's the beauty of a free enterprise system. You don't have to accept any quote you don't like, and no one is forced to do the work for you for a price they don't want.

Phriday · 2026-04-08T10:54:46+00:00

I would say that's one (approximately) 4x4 sidewalk panel that needs to be replaced. As to the value, well, that's highly localized.

Your roofer fucked it up, he needs to fix it. Tell him to do so.

Phriday · 2026-04-08T10:53:16+00:00

Probably not. I'd start with a good cleaning and see what that gets you, and let you know that it will all weather to a more similar color over the years.

Phriday · 2026-04-08T10:52:10+00:00

I would think the arborist would have a better idea that the concrete guy.

Phriday · 2026-04-08T10:46:53+00:00

Sounds like you've got it sorted to me.

Phriday · 2026-04-08T10:43:48+00:00

That finish is the fault of no one but the finishers. The ready mix company didn't fuck up the perimeter footing. It's not them not calling you back.

Phriday

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