Concrete Crusher at Engineering Open House

[pendejadafcc]

what was the blue flash?

[garrettmikesmith]

@pendejadafcc camera flash



[CarsonConcreteCorp]

It's a good video no doubt, but i agree with @attaintruefreedom , it could have been hazardous if people seated too close got hurt with flying rubble!

[daveduznotrull]

failed at 900,000 lb or 408 metric ton

[omegaisdabomb]

note: crushes at 0:48

[roidfreakmonster]

I spent many a night in Talbot Hall, where this video was taken.

Kind of sad though that while I'm an UIUC engineering alum I never got to see the concrete crushing in person.

ILL-INI!

[mulraymanners]

i want to see this done with aerogel

[donahu85]

sounds like an auction

[dvfddd]

hahaha WOW!

Now i want one of that!

[Nexxion]

Besides that the amount of weight held is quite impressive, imagine having to build a machine that can not only push down with over a million pounds of force, but be able to recognize the moment the object below it gives way and pull back all that downward force.

[roidfreakmonster]

Once the load cell recognizes that the rate of the load increase decreases with time, that's when the operator stops it.

Or when the concrete breaks :)

[1964corvan]

@Nexxion its done hydraulically so its not going to fly out of control when it breaks! you can't compress a liquid so thats why it didn't much after it crushed it!

[hcoll]

oooo

[kris120890]

No.

Just one big safety glass.

[BeerWolf84]

No safety glass for the 'audience' ... ?

[Zubatec]

Can anyone tell me what is it good for ??

[Prysym]

The demonstration is less about the crusher (which is impressive, to be sure) and probably more to show the compressive strength of the concrete.

[driscoll42]

Concrete needs to tested before any construction project to ensure it withstands the loads intended for it, I spent a whole summer testing cylinders like this one, although much smaller, for the Illinois DOT. Two samples of a mixture for every project are sent in and tested, if both pass you can assume the method works.

[manfred05]

WoW! 450 000 kg

[YdOuUmRb]

actually if u look closely you can see a Plexiglas wall in front of the audience. There wasn't any danger here.

[tvunder]

as you can see The Pressuring devices Stops Just a few cms down the core rupture that means its thinked to not blow the pieces away.

[attaintruefreedom]

I wonder how they were so certain that wasn't going to be dangerous for the audience? It would seem with force like that, the chance of a piece of rubble shooting out would be very likely.

[andrefantastisk]

Yea, this was also my first thought. It's an very stupid experiment which could cause servere damage to the audience.

[dhawkins1234]

They have viewing shields in front of the audience, look closely

[lewisfryatt]

wow that's awesome!

[EJConrad]

fascinating!