PAVEMENT HEATING

AN EXPERIMENTAL HEATED PAVEMENT HAS BEEN CONSTRUCTED IN TRENTON, NEW JERSEY, BY THE NEW JERSEY DEPARTMENT OF TRANSPORTATION IN ORDER TO DEVELOP IMPROVED METHODS FOR SNOW AND ICE CONTROL. THE EXPERIMENTAL PAVEMENT SERVES THE DUAL PURPOSES OF (1) PROVIDING DESIGN DATA FOR SNOW-MELTING SYSTEMS OF EMBEDDED PIPE, AND (2) UTILIZING THE EARTH BOTH AS A SOURCE OF HEAT AND AS A MEANS OF STORING SOLAR ENERGY. WROUGHT IRON PIPES OF VARIOUS DIAMETERS ARE EMBEDDED IN PORTLAND CEMENT CONCRETE AND BITUMINOUS CONCRETE AT DEPTHS OF 2 AND 4 IN. AND AT VARIOUS SPACINGS. DURING SNOW AND ICE CONDITIONS AN ETHYLENE GLYCOL SOLUTION IS CIRCULATED THROUGH THESE PIPES, AND A RECORD IS KEPT OF THE FLOW RATE AND TEMPERATURE DROP OF THE HEATING FLUID. THE EFFECTIVENESS OF ANY PARTICULAR COMBINATION OF PIPE DIAMETER AND SPACING AND DEPTH OF EMBEDMENT MAY BE EVALUATED BY OBSERVING THE RATE AT WHICH THE SNOW MELTS AND BY CALCULATING THE AMOUNT OF HEAT SUPPLIED TO THE PAVEMENT BY THE EMBEDDED PIPES. HEAT IS EXTRACTED FROM THE EARTH BY MEANS OF A BURIED HEAT EXCHANGER CONSISTING OF 6,000 FT OF 1 1/4-INCH WROUGHT IRON PIPE. THE EARTH BENEATH THE PAVEMENT WAS EXCAVATED TO A DEPTH OF 13 FT, AND 5 LAYERS OF PIPE WERE LAID WITH A HORIZONTAL AND VERTICAL SPACING OF 2 FT AS THE PIT WAS BACKFILLED. HEAT IS TRANSFERRED TO THE SURFACE BY CIRCULATING THE ETHYLENE GLYCOL SOLUTION THROUGH THE BURIED PIPE HEAT EXCHANGER AND THEN TO THE PIPES EMBEDDED IN THE PAVEMENT. /AUTHOR/

Media Info

  • Media Type: Print
  • Features: Figures; Photos; Tables;
  • Pagination: pp 129-145
  • Monograph Title: Snow removal and ice control research
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00207213
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Feb 8 1971 12:00AM