EVALUATION OF ELECTRICALLY CONDUCTIVE CONCRETE CONTAINING CARBON PRODUCTS FOR DEICING

Using electrically conductive concrete for deicing is an emerging material technology. Due to its electrical resistance, a thin layer of conductive concrete can generate enough heat to prevent ice formation on concrete pavement when energized by a power source. Under research sponsored by the Nebraska Department of Roads, a concrete mixture containing steel fibers and shavings was developed specifically for concrete bridge deck deicing. The mixture has a compressive strength of 31 MPa and provides average thermal power density of 590 W/m-sq. with a heating rate of 0.14 deg C/min in a winter environment. During development of the conductive concrete, several drawbacks about using steel shavings in the mixture were noticed. As a follow-up effort, carbon and graphite products were used to replace steel shavings in the conductive concrete design. The electrical conductivity and the associated heating rate were improved with the carbon products. A conductive concrete deck has been implemented for deicing on a highway bridge at Roca, located approximately 15 miles south of Lincoln, Nebraska. The Roca Spur Bridge has a 117-ft-long and 28-ft-wide conductive concrete inlay, which has been instrumented with temperature and current sensors for heating performance monitoring during winter storms. Experimental data and operating costs are presented herein.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/13846872
• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Tuan, C Y
  • Yehia, S
• Publication Date: 2004-7

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 287-293
• Serial:
  • ACI Materials Journal
  • Volume: 101
  • Issue Number: 4
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0889-325X
  • Serial URL: https://www.concrete.org/publications/acimaterialsjournal.aspx

Subject/Index Terms

• TRT Terms: Admixtures; Bridge decks; Carbon fibers; Conducting materials; Deicing; Electrical conductivity; State departments of transportation; Steel fibers; Surface course (Pavements)
• Identifier Terms: Nebraska Department of Roads
• Geographic Terms: Nebraska
• Subject Areas: Bridges and other structures; Design; Highways; Materials; I24: Design of Bridges and Retaining Walls; I32: Concrete;

Filing Info

• Accession Number: 00977813
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 16 2004 12:00AM