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Friday, October 25, 2013

Furry Concrete? (Oct 25)

UAS FH Construction Update for 10/25/2013

Furry Concrete?

Take a close look at this concrete; it looks like it is trying to grow fur. 

I know winter is coming, but isn’t this going too far? 

Concrete is very strong in compression, typically reaching 4,000 pounds per square inch (PSI). However, concrete is weak in tension, typically 400 PSI.  For example a concrete cylinder the size of your coffee mug could hold school bus on top of it without cracking.  However, if you were to place this same concrete cylinder in tension by hanging from it, you could barely suspend a Smart Car.  This is why we place steel inside structural concrete.     The concrete handles the compressive pressures while the steel handles the tension stresses.

Our fury concrete is called Fiber-Reinforced Concrete (FRC).  These fibers are made from many different materials; steel, glass, nylon, polypropylene and cellulose.  The Contractor has used polypropylene fibers in the concrete for the curb/gutter out in front of the new UAS Freshman Residence Hall.  These fibers eliminate the need to place steel in the curb /gutter and it also makes the concrete more durable, especially when exposed to freezing /thawing cycles. 

Fiber-reinforced concrete is much like our community.  Some of us are good under compression, some are good under tension, some are good at math, some are good at biology and some are good at art.  When we are all mixed together in a community, we strengthen each other and accomplish much greater things, than if we tried to stand all alone.  

 

2013 10-25 Furry Concrete
2013 10-25 Furry Concrete
2013 10-25 Curb-Gutter
2013 10-25 Curb-Gutter

 

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