THE APPLICATION OF THEORETICAL TEMPERATURE DISTRIBUTION CALCULATIONS IN BITUMINOUS ROADS

THE THEORETICAL ANALYSIS OF TEMPERATURE DISTRIBUTION IN FLEXIBLE PAVEMENTS IN RELATION TO THE TIME OF DAY AND DEPTH, AND ITS AGREEMENT WITH RESULTS OF TEMPERATURE MEASUREMENTS AT THE SOIL SURFACE AND VARIOUS DEPTHS ARE DISCUSSED. THE FACTORS CONSIDERED ARE THE AVERAGE TEMPERATURE IN THE ASPHALT, THE COEFFICIENT OF THERMAL CONDUCTIVITY, AND AN EMPIRICAL COEFFICIENT RELATED TO THE DIFFERENCE BETWEEN THE MAXIMUM AND MINIMUM TEMPERATURES AT ANY GIVEN DEPTH. THE CONCLUSION IS THAT FOR THE SPECIFIC MEASURING CONDITIONS AT 27.5 DEGREES C AIR TEMPERATURE, THE THEORETICAL AND ACTUAL DISTRIBUTIONS ARE SIMILAR ONLY IN THE WARMING PHASE. THE AVERAGE TEMPERATURE ESTABLISHED FOR THIS PHASE IS NOT THE AVERAGE TEMPERATURE AS EXPRESSED BY HALF THE SUM OF THE MAXIMUM AND MINIMUM VALUES OVER THE SAME 24 HOUR MEASURING PERIOD; IT IS THE AVERAGE VALUE CALCULATED FOR OBTAINING CORRESPONDENCE BETWEEN THE MEASUREMENTS AND THE THEORETICAL DISTRIBUTION DURING THE WARMING PHASE. IF THE MAXIMUM AIR TEMPERATURE, THE COEFFICIENT OF THERMAL CONDUCTIVITY AND THE EMPIRICAL COEFFICIENT ARE KNOWN, IT IS POSSIBLE TO PREDICT THE TEMPERATURE DISTRIBUTION USING THEORETICAL EXPRESSIONS. ATTENTION IS DRAWN TO THE IMPORTANCE OF TAKING ACCOUNT OF THE CLIMATIC CONDITIONS SPECIFIC TO EACH SITE. /RRL/

  • Supplemental Notes:
    • 9 Pp, 7 Fig, 1 TAB, 10 REF
  • Corporate Authors:

    Conf Asphalt Pavements Proc /S Africa

    ,    
  • Authors:
    • Livneh, Moshe
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00205666
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Jul 18 1971 12:00AM