The paving crew extended a mixer truck’s chute over the stainless steel electrodes that make up part of a heated pavement technology developed by Iowa State University engineers.
And then came the other part: a load of electrically conductive concrete. The first delivery of the thick, heavy mixture slid onto one of the steel rods that send electricity – and ultimately, heat – throughout the concrete.
It was a raw, gray October afternoon on the Iowa Department of Transportation campus in Ames. Even the Manatt’s Inc. crew members were in sweatshirts with hoods pulled up.
As the crew hustled to work the wet concrete with shovels, spreaders and hand trowels, Iowa State engineers went to work, too.