Home Forums Hunting & Shooting Hunter's Campfire What caused this failure?

Your opinion matters...

Concrete guys will know straight away...

I guess load.

Too much load; compression failure.

^^^This^^^
And possibly a poor concrete design mix. Odd how it blew apart at the steel layer, almost like it wasn't poured simultaneously.
Can't see how or why anyone would do that, though.

I wonder if the steel we see is all that was incorporated in that column? Any more in the interior?

^

bad pour subsequent compression failiure

Gravity

I’m not a concrete guy. But I’m in the industry. I’m going out on a limb here. Vertical compression failure due to improper installation of rebar, or a poor design, engineered, looks like there’s no rebar internally just an outer perimeter. Also, I think it’s a bad mix not enough aggregate?but most likely concrete sitting in the truck, too long, not mixed properly and those lines.

I’d like to add possibility of it not being vibrated enough or over vibrated and aggregate settled to the bottom of the column. I hope you have a definitive answer cash :-)

I'm with BamBam.^

Someone did not reject the 3 hour mixed load that had lots of water added to it to make about a 10" slump--- 45 degree crack--- unedumacated guess

For column that size, it sure looks like they skimp on rebar. Not even installed properly. The verticals look like the number three bar the horizontals I think are way undersized. Not enough steel in that column. Also not installed properly. Just my two. Cents.

My guess is there was a cold joint about 18” above the “4”. As Mark Shubert said, 2 separate pours. Probably the first truck filled the form half way, and the second truck was delayed. By the time it got there, the first pour had begun to set up. This leaves a very weak “cold joint”

Don't know crap.


I don't like how close to the surface the rebar is.

Yeah, I’m going with that also. I work in New York City, the mixers have counters on them, and they counter rotations of the drum depending on the mix. They have to meet a certain amount of rotations. Also, they have timed on how long they’re on the job for and I have seen them rejected.

No one has said Unions yet or Global warming 👍🏻

I'm not a concrete guy by any stretch.
But I see a horizontal line going around the top of the blow out,where the pour was possibly continued the following day. Also don't see any more rebar in the chunks that are contained by the rebar. Possibly not enough rebar for that column.

Wetback labor? Cheapskate contractor who was paying off the inspector so he could minimize the amount of rebar he installed? Maybe both?

Poor concrete