THERMAL CONDUCTIVITY OF COMPACTED SAND/ICE MIXTURES

THE THERMAL CONDUCTIVITIES OF 20-30 OTTAWA SAND AND 30-100 OTTAWA SAND, COMPACTED WITH 30-100 CRUSHED ICE, WERE MEASURED BY THE PROBE METHOD OF TRANSIENT HEATING. A COMMERCIALLY AVAILABLE PROBE, 0.02 INCHES IN DIAMETER WITH A LENGTH/DIAMETER RATIO OF 412, WAS USED. TEMPERATURES WERE 18 AND 23 F. WATER CONTENTS RANGED FROM AIR-DRY TO 100 PERCENT BY WEIGHT. AS THE PERCENTAGE OF ICE WAS INCREASED, THERMAL CONDUCTIVITY DECREASED WITH THE PERCENTAGE OF SAND. SINCE THE CONDUCTIVITY OF QUARTZ IS 3.5 TIMES THAT OF ICE, IT WAS CONCLUDED THAT CONTACT RESISTANCE AT THE INTERFACE BETWEEN SAND AND ICE AT 18 F MUST BE HIGH. THERMAL CONDUCTIVITY AS 23 F WAS HIGHER THAN AT 18 F. IT APPEARED THAT A REDUCTION IN CONTACT RESISTANCE WITH TEMPERATURE WAS RESPONSIBLE. KERSTEN'S 1949 DATA FOR SANDY SOILS AT 25 F COMPARED FAVORABLY WITH THE RESULTS FOR THE SAND/ICE MIXTURES. /AUTHOR/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 35-47
  • Monograph Title: Moisture responses, underclay development and frost action
  • Serial:

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Filing Info

  • Accession Number: 00237503
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Jul 29 1994 12:00AM