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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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Richard Lewis, P.E.
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