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RE: FRP rebar in concrete design

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The National Research Council of Canada http:/ has done some
work with FRP reinforcing and, if memory serves, a highway bridge in Ottawa
was built using it. I remember reading a report about the work, but can't
find it right this minute.  You might hunt their website for some

Since much of Canada has REAL winters, there is a lot of salt used on roads,
which migrates to parking garages and bridges.  FRP is  proposed as a method
of making concrete structures last longer.  Balconies might be another use,
but how often do people salt their balconies?

Paul Meyer

> -----Original Message-----
> From:	Roger Turk [SMTP:73527.1356(--nospam--at)]
> Sent:	Monday, March 01, 1999 03:30 pm
> To:	seaint(--nospam--at)
> Subject:	FRP rebar in concrete design
> One of the things that made the marriage of steel and concrete so
> compatible 
> was that the coefficient of thermal expansion of both materials was nearly
> the same.  I don't think that you can say that about GFRP rebar.
> Another thing about GFRP reinforcing is that there is no yield point.
> Glass 
> is linearly elastic, probably conforming to Hooke's Law better than any
> other 
> material, but then it breaks!  No warning, no ductility, just failure.  A 
> very high factor of safety should be used with this material.
> A. Roger Turk, P.E.(Structural)
> Tucson, Arizona