Effect of Temperature Variations on Electrical Resistivity of Conductive Concrete Heated Pavement System

This study investigates the effects of temperature changes on the electrical resistivity characterization of electrically conductive concrete (ECON) heated pavement systems (HPS). ECON is commonly characterized in terms of its electrical resistivity, the reciprocal of electrical conductivity. Compared to that of normal concrete, the electrical resistivity of ECON HPS is lower (or inversely, its electrical conductivity is higher), enabling it to allow passage of electric current and consequently generate heat to prevent ice and snow accumulation on paved surfaces. In this study, the electrical resistivity of the ECON HPS was calculated using applied voltage and electrical current measurements during ECON HPS operations under various weather conditions. Since the ECON behaves as a semiconductor, the electrical resistivity of ECON is temperature-dependent; as the temperature increases, the electrical resistivity decreases, helping to accelerate heat generation. The electrical resistivity values at different ages and weather conditions exhibited a very similar trend; these values were very stable and only slightly different with increase in ECON age and decrease in temperature. This study provides an essential understanding of the electrical resistivity of ECON HPS with respect to achieving sufficient heat to melt ice and snow for airport application.

Language

  • English

Media Info

  • Media Type: Web
  • Pagination: pp 51-58
  • Monograph Title: Airfield and Highway Pavements 2019: Innovation and Sustainability in Highway and Airfield Pavement Technology

Subject/Index Terms

Filing Info

  • Accession Number: 01728601
  • Record Type: Publication
  • ISBN: 9780784482476
  • Files: TRIS, ASCE
  • Created Date: Jul 18 2019 3:03PM