Scientists work to stop bridge corrosion

Dec 08, 2005

Purdue University engineers in West Lafayette, Ind., say they're developing a new generation of bridges that will be corrosion resistant.

The researchers say such bridges will utilize plastic bars reinforced with glass or carbon fibers, promising to double the number of years between expensive repairs.

Concrete-strengthening steel bars called "rebar," currently embedded in bridge-deck concrete, is exposed to de-icing road salt that seeps through pavement cracks, said Robert Frosch, an associate professor of civil engineering.

"Bridge decks generally have to be replaced 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 a deck to perhaps 50 to 100 years," Frosch said.

Purdue civil engineers have installed a bridge deck containing the fiber-reinforced polymer bars in a span over Interstate 65 near Demotte, Ind. Sensors inserted in the deck constantly record data that is remotely monitored at Purdue to determine how well the structure is performing.

The researchers plan to eventually publish papers detailing how the bridge deck responds.

Copyright 2005 by United Press International

Explore further: Dinosaurs fell victim to perfect storm of events, study shows

add to favorites email to friend print save as pdf

Related Stories

Polymer grid technology a boon for bridges

May 24, 2005

When the long-awaited Highway 151 bypass around Fond du Lac, Wisconsin, opens later this year, vehicles traveling northbound will cross DeNeveu Creek on a bridge like no other in the country. Externally, the bridge looks ide ...

Recommended for you

Understanding the economics of human trafficking

40 minutes ago

Although Europe is one of the strictest regions in the world when it comes to guaranteeing the respect of human rights, the number of people trafficked to or within the EU still amounts to several hundred ...

User comments : 0