Engineers Studying Material For Bridges.
Construction Digest, February, 2006
Staff West Lafayette, Ind.-- Purdue University reports that civil engineers at the university are developing a new generation of bridges that will contain corrosion-resistant plastic bars reinforced with glass or carbon fibers, promising to double the number of years between expensive repairs.
Rebar currently used in bridges is susceptible to corrosion, especially in the deck. The rebar embedded in bridge-deck concrete is exposed to deicing road salt that seeps through cracks in the pavement, says Robert Frosch, an associate professor of civil engineering. "Bridge decks generally have to be repaired every 20 or 30 years, which is very expensive, but replacing the rebar with bars made out of fiber-reinforced polymers could extend the lifetime of...
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