Tell me what you see here?

[Hay Dude]

I would have to disagree.
We have a lot of concrete at work that gets forklifts driven over it which weight 10-12k empty and 14-16k loaded (sometimes up to 16k when overloaded).
We just had a large (<26k sf) warehouse put up with floors designed for those loads.
The ONLY metal in the floor is the dowels between the sections of the pour and between the walls and the floor.
None of it has mesh or rebar in it. Fiber and plasticizer, yes but rebar or mesh, no.
Now the walls and the footer do have rebar in them, but not the floor.

Aaron Z

So your concrete has fiber in it, right? And you dont have breaking or cracking issues.
Some people use rebar. Some use wire mesh, some use fiber. Some use combinations. I think the point he was making is that he wont pour a slab without rebar or some type of reinforcement. Neither would I.
In the video pour, we dont know what the underlying ground conditions were. For all we know, several trees could have been taken down to make room for the garage. IF that is the case, then rebar would be an absolute requirement for me over ground compacted in lifts.
We dont know the history and the background of the ground preparation.
I watched a garage project where a smaller older garage was razed and a larger one was built over the footprint. Rebar was not used and the floor cracked later.
As I and many others have said, its not a panacea, but an insurance policy to prevent cracks from becoming sinking areas of uneven concrete.

If given the choice, I bet most customers would opt for properly installed rebar than nothing. I have lived by that technique and managed to live a peaceful, prosperous life with few call backs and continuous construction work load.

 

[Hay Dude]

LoL...Are you now or have you ever been a licensed general or masonry contractor, architect, engineer? were you ever employed by said professionals as a career ?...if not your opinions are those of an amateur...there are lots of amateur contractors out there...

BTW FWIW... the biggest job I ever had responsibility for was several portions of the (new) 7 mile bridge in the FL keys...as a contractor for Misener Marine...

Oh I almost forgot...I never did any work for the DoD (Pentagon etc.) but I did turn down a chance to work for the State dept....the job was going to Russia and working on the second US embassy building...after the original new one was found to be loaded with bugs and eavesdropping equipment...that was for the Brown company...

I dont need a college degree (although I have one) to know whats right and wrong. I was taught by an accomplished mason from the Isiah Williamson School of Trades. One of the best trade schools in the country. That man passed away a few years ago. He was my father and I have the utmost respect for him. He was an excellent mason. Respected and referred for 50 years in my community. I have continued that tradition.
Your insinuations are getting a little personal and close to home, which is amusing considering you were the one whining about unfair treatment by our moderators in another thread you started.
With all due respect, try a little humility, stop calling other TBN members “amateurs” because they dont have a degree from Harvard school of engineering and show some respect and youll get respect back.
I have taken many “architects” plans and reworked them using value based engineering and gotten a lot of respect back from them and saved my customers many thousands of dollars.
Residential concrete work differs from all the bridges you watched being built from an air conditioned office trailer. Just because you were on a supervisory crew for a concrete bridge, doesn’t make you an expert in smaller projects. I wouldn’t want a contractor that builds sky scrapers build my garage and vice versa.

 

[Hay Dude]

Anyone trying to argue the points I have made are obviously completely missing them...!
Making assumptions and drawing conclusions from and playing video detective is just too funny...

True, but making the assumption that all is well is also in itself, an assumption or conclusion. I think we can all see the rebar was installed and treated improperly during the pour and other precautions were missing. Therefore most of us “Amateurs” are also betting the concrete mix was runny/watered down and not runny from additives due to the aforementioned improper rebar installation.

 

[aczlan]

True, but making the assumption that all is well is also in itself, an assumption or conclusion. I think we can all see the rebar was installed and treated improperly during the pour and other precautions were missing. Therefore most of us “Amateurs” are also betting the concrete mix was runny/watered down and not runny from additives due to the aforementioned improper rebar installation.

I think we can all agree that by the appearance of the pour in the video, that slab was not poured in a manner conducive to getting the most strength possible out of the slab.

It may be enough to do what the homeowner was trying to do, but it could have been significantly stronger had it been prepared and poured differently.

The point that I was trying to make was that a blanket statement of "it's a waste of money to pour a concrete slab without rebar in it" is incorrect given the concrete that is currently available.


Aaron Z

 

[3Ts]

I worked for a company that had a parking pad poured for a Boeing 707 aircraft - no rebar was used, only dowels to tie the separately poured slabs together. No cracks that I noticed in the 20 years I worked for them. BUT, I know that there was a lot of engineering that went into the slabs. My neighbor worked for the concrete supplier so I got to see both sides of the job.

 

[/pine]

...I have taken many architects plans and reworked them...

You mean like the guys in the video did with the rebar ?? :laughing:

 

[Redlands Okie]

Several of you guys need to put in a request to the people in the video. Need the paper work for the soil testing before the job started. The paper work on recommended soil additives. Need the paper work on the compaction testing. Need the paper work on the slab prep from the engineer. Need the info on the concrete mix recipe from that engineer. Finally need the paper work from the cylinder tests for each truck load from the concrete pour. Contraction and expansion joint plans. Paper work on recommended curing and sealer agents after the pour.

Probably left out some things but it should be a start.

 

[/pine]

Several of you guys need to put in a request to the people in the video. Need the paper work for the soil testing before the job started. The paper work on recommended soil additives. Need the paper work on the compaction testing. Need the paper work on the slab prep from the engineer. Need the info on the concrete mix recipe from that engineer. Finally need the paper work from the cylinder tests for each truck load from the concrete pour. Contraction and expansion joint plans. Paper work on recommended curing and sealer agents after the pour.

Probably left out some things but it should be a start.

LoL...they relied on "value based engineering" :laughing:


BTW I already suggested a simple Swiss hammer test...it would be telling since it's after the fact...!

 

[Cat_Driver]

Without knowing the complete mix formula it is IMPOSSIBLE to determine how much water would be too much...!

Here is a paste job that counters much of the incomplete data cited in the paste job of the post above...!

Anyone that has pumped concrete...especially vertically for long distances know how wet the mix has to be...!



Flowing Concrete (high slump) - Titan America

Everyone can see it pours out like water which would bring a COLLAPSED SLUMP.

 

[/pine]

LoL...I'm more than familiar with ASTM C143 / C143M methods...

Everyone can see it pours out like water which would bring a COLLAPSED SLUMP.

without knowing the mix formula the slump means ZERO...what is it you don't understand about an 8"-11" slump being copacetic ??