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Fwd: Re: Concrete Wraps

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> 1. I have some composite background, and it's not obvious how a
> circumferential wrap is going to strengthen a reinforced concrete column.
> The main strength of the fiber is normal to the load to be carried.
> 

Confinement improves strength, and most importantly, it greatly improves
ductility allowing the member to better resist cyclic loading (the
hysteresis curve would look much better.) However, I think that the wrap
will be more effective for circular columns.

> 2. I didn't see anything dealing with durability and how the overlay
> prevents whatever damaged the concrete in the first place from doing so
> again.

If the carbon fiber is impregnated with epoxy, it will probably procure
a good protection against carbonation weathering and thus corrosion. 


Moni Serhal



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