HEATING OF ASPHALT PAVEMENTS BY USE OF RADIATION. A THEORETICAL ANALYSIS FOR THE ESTIMATION OF THE TEMPERATURE, DISTRIBUTION AND THE HEAT ENERGY UTILIZED

UPPVAERMNING AV ASFALTBELAEGGNINGAR MED HJAELP AV STRAALNING. EN TEORETISK ANALYS FOER BEDOEMNING AV TEMPERATURFOERDELNINGEN OCH DEN TILLGODOGJORDA VAERMEENERGIN

Greater and greater importance is attached to the maintenance of asphalt pavements. Among other things, methods which involve preheating of the existing road surface have been used. In this report, numerical results of a derived method of calculation giving the temperature of an asphalt pavement during and after heat transfer by radiation are presented. Energy conditions are also studied. Programs made for the Hewlett-Packard calculator, HP-97, have been applied. The assumptions which the analysis is based on are, however, idealized. From the results it appears that the surface temperature is comparatively high when the radiation ceases, and that its magnitude is dependent on the length of heating time. However, the surface temperature decreases rapidly if no insulation of the surface takes place. The penetration of heat into the pavement will then take a comparatively long time. After several periods of heating the results can be superposed. If subsequent cutting is permitted in A pavement layer when the temperature exceeds a certain level, it ought to take place some time after completion of heating. Perhaps, however, cutting can be done earlier. The higher heat energy in the surface layer can be used in renewed laying and compaction operations. (TRRL)

Language

  • Swedish

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00324781
  • Record Type: Publication
  • Source Agency: Swedish National Road and Transport Research Institute (VTI)
  • Report/Paper Numbers: VTI Rapport Nr 191 Monograph
  • Files: ITRD, TRIS
  • Created Date: Aug 15 1981 12:00AM