Tell me what you see here?

[crashz]

I didn't see the rebar piling the first time. Looks a sloppy mess the second time around. I did see one guy tie one joint though. Also saw a few grade pins

Once the rebar is covered, its covered. Gone. Only to be seen when they hammer out that floor and do it right.

 

[MossRoad]

Look at 4:44 in the video. The guy kicks the rebar, then it's all over the place after that...

 

[turnkey4099]

- Looked pretty watery compared to the stuff we put in over the last month.
- Did they compact that stone and sand?
- Would that rebar do anything laying on the bottom like that?
- Did anyone notice when they were pouring that 8-10" wide thingy later in the video the guy moving the concrete around with his gloved hand? It looked like gray water.
- Also, call the police on the little kids playing in the sand. There's not supposed to be any fun on concrete jobs.

Back in the day I have seen jobs done that way but the rebar would be lifted up a bit after the concrete was placed (before it set up). How accurate the rebar placement would have been just guesswork.

 

[fatjay]

I feel bad for the guy that paid money for that pour. I don't think he's going to be happy with it. The skid steer smoothed out the loose dirt, didn't remove it. then smoothed out the sand, no compaction. One could argue that damp sand is pretty packed, but I'm not sure. It looked like that rebar was half sunk into the sand itself, and huge gaps in it as well. This is exactly what I wanted to avoid when pouring the slab for my garage. I didn't see any control joints either. This is why I did my pour myself instead of paying someone to do it. If I was standing there watching someone do that to my garage I might have shot them.

 

[/pine]

I realize the question posed is "what do you see here"...but what I see "here"...is a bunch of amateur armchair engineers...!
There is really no information on the actual mix of the concrete for all we know it could have been a high PSI mix to allow for a wet, easy to place pour...it could also have had fiber along with a rich Portland content which greatly increases the tinsel strength of the slab eliminating the need for wire etc...

As for the rebar...for the most part unless there is a deeper "stiffener" required for specific load bearing purposes etc. most slabs do not even require a rebar grid (wire mesh and or fiber is all that is required to obtain the required strength)...there are millions of basic floor slabs designed by engineers and architects where no rebar was/is required..in a majority of cases rebar for this type of application is merely overkill...

I'm not saying the above is the case it does look like a lousy, amateur job but you can't always base things on the way they appear...

Control joints are often sawed shortly after the pour is made...

 

[aczlan]

I realize the question posed is "what do you see here"...but what I see "here"...is a bunch of amateur armchair engineers...!
There is really no information on the actual mix of the concrete for all we know it could have been a high PSI mix to allow for a wet, easy to place pour...it could also have had fiber along with a rich Portland content which greatly increases the tinsel strength of the slab eliminating the need for wire etc...

As for the rebar...for the most part unless there is a deeper "stiffener" required for specific load bearing purposes etc. most slabs do not even require a rebar grid (wire mesh and or fiber is all that is required to obtain the required strength)...there are millions of basic floor slabs designed by engineers and architects where no rebar was/is required..in a majority of cases rebar for this type of application is merely overkill...

I'm not saying the above is the case it does look like a lousy, amateur job but you can't always base things on the way they appear...

Control joints are often sawed shortly after the pour is made...

Agreed. Doesn't look good, but not nessecairly bad.
We had a 28,000SF (ish) slab poured at work and the only rebar is to pin the 3 pours together and to pin the floors to the walls. There is lots of rebar in the walls, but none in the floor.
IIRC, it had fibers, plasticizers and other goodness in it, but no rebar.
It will see lots of forklifts weighing 10k to 16k running across it.

Aaron Z

 

[cqaigy2]

What little flat work i was involved in, only few had rebar and that was for large loads. Most of the others were reinforcement mesh and or fiber added. All the other work, non-flatwork had a variety of sizes of rebar the biggest being something like 2" or so. It was used on large thrust blocks, around pipes, part of an irrigation project in central Washington state.

 

[Industrial Toys]

Just followed some machine noise to find my new neighbour having a large (very large) slab poured. Indicated to him the importance of pulling up rebar. He deals with military infrastructure contracts, so is well versed with this.

My guess, is that putting rebar and mesh on chairs makes walking and using wheelboroughs difficult. I have pulled up my own rebar on recent projects, seeing the guys neglecting it. It's a LOT of work and I can see why the labourers don't obsess about it.

 

[ovrszd]

A contractor that doesn't elevate the rebar doesn't care. Pretty simple.

 

[MossRoad]

duplicate

 

[MossRoad]

Why did they even bother with rebar in that video, seeing how it's just laying on the bottom, and then blown all over the place during the pour? I was watching one of them put wire ties on it and he left it pointed up. So if they'd have pulled it up during the pour, the wires would have been sticking out.

Look under his feet - it's all gone in a bunch of area, and look in the concrete in front of the pour - it's up and at a 45 degree angle. How did it get like that? Probably because they did a poor job tying it, if at all.

 

[ovrszd]

No ties. First time I've ever saw that.

 

[MossRoad]

No ties. First time I've ever saw that.

They showed a guy putting them in, but then you see that screen grab from the video and have to wonder if they didn't do them all, or....

As I was putting in rebar last month, using the same tie tool the guy in the video was using, if you go real fast and just a spec too much, the wire wraps tight, then cracks and half a spin later it breaks and leaves just 1/2 a turn of wire holding things together. If you bump it or step on it, it lets loose.

So I wonder if they put them on and spun them till they snapped off, then left them there with just 1/2 a wrap hold them? It would be easy to do.

 

[Industrial Toys]

If you don't educate yourself on proper proceedures on the job you are having done. ask a lot of questions and constantly supervise, then you are just leaving yourself wide open to be another sucker.

 

[Cat_Driver]

I'm not saying the above is the case it does look like a lousy, amateur job but you can't always base things on the way they appear...

Control joints are often sawed shortly after the pour is made...

"you can't always base things on the way they appear."
Are you pulling our leg here? " you can't always base things on the way they appear." .......So as it appeared to me and videos don't lie, that when he swung the shute around it BLEW the rebar aside like a leaf blower blowing fall leaves. I don't be to be an armchair engineer to realize that ain't right in anyone's book. I've seen enough concrete jobs to know you don't leave rebar flat on the ground.

It all appears quite clear to me and a lot of others that the retired Highway Patrol officer was scammed

 

[k0ua]

Wow, just wow. I thought I had seen some crummy concrete jobs.. But live and learn. I thought this was a pretty good joke demonstration, but that poor guy got taken almost as bad.

 

[Jstpssng]

^^^^
Wow. I learned a lot from this. This weekend I'm going to apply my new knowledge and pour a 6'foundation.

 

[Industrial Toys]

You mean 8 X 8?

I seem to recall reading that fiber contrary to common belief, is NOT a replacement for rebar. I forget at the moment, what it's good for? Hairline cracks maybe?

I never realized I was holding my hammers all wrong. Since I never put a hammer in a tool belt, and so don't need all that handle length, I will be cutting all the handles half off, to make them more handy. That guy is a genius!

 

[k0ua]

^^^^
Wow. I learned a lot from this. This weekend I'm going to apply my new knowledge and pour a 6'foundation.

Well, the man certainly cleared up a lot of long held misconceptions. Who knew you could get it done for $20 and a burrito? I always suspected all that contractor talk about how concrete work was so hard was a bunch of malarkey. That man showed us how easy it all could be.

 

[Hay Dude]

Gee and here all this time I thought concrete work was hard.....