Conductive Concrete   

Implementation

The Nebraska Department of Roads has sponsored a demonstration project at Roca, Nebraska, to implement a conductive concrete deck inlay on a highway bridge. The inlay has been instrumented with temperature and current sensors to provide data for heating performance monitoring during winter storms.

Roca Spur Bridge is a 150 ft long and 36 ft wide, three-span highway bridge over the Salt Creek at Roca, located about 15 miles south of Lincoln, Nebraska. A railroad crossing is located immediately following the end of the bridge, making it a prime candidate for deicing application. The Roca Bridge project was let in December 2001 and construction was completed in November 2002. The bridge deck has a 117 ft by 28 ft and 4 in. thick conductive concrete inlay instrumented  for deicing operation.

	Junction boxes		Power chords and thermocouple wire in PVC conduit
	Angle iron for electrodes		Slurry grout to prevent de-bonding
	Casting conductive concrete		Finishing Surface
	Finishing Surface		Finishing Surface
	Angle iron electrode - Close-up		Power chord electrode connection
	52 individual conductive concrete slab		Grouting power chord connection
	Deicing controller system		Deicing system in operation
	Deicing system in operation