TEMPERATURE DISTRIBUTIONS IN CYLINDER-SHAPED BODIES OF ASPHALT MIXES DURING AND AFTER CONDITIONING IN WATER-BATHS

The behaviour of asphalt pavements under traffic loading and certain types of maintenance activities, such as heating and compaction, are greatly affected by the temperature distributions involved. In the search for appropriate temperature-dependent constitutive relations between stresses and strains in the different cases, some further knowledge is required. This applies, for instance, to the thermal properties of hot mixes. It is also of importance to see to what extent analytically based methods of temperature determination can be used. The purpose of the present report has been to gain further insight into these questions. For practical reasons the studies have been made on cylinder-shaped laboratory manufactured specimens of different sizes and compositions during and after conditioning in water baths. The temperatures have been monitored at the boundary as well as at the centre. The results obtained during the heating period corresponded closely to theory. This is true provided that appropriate values of the thermal diffusivity of the samples of different composition were used. During cooling, the agreement with theory weakened. This was expected due to simplifying assumptions in the theory. However, good agreement was obtained during the first 15 minutes. (Author/TRRL)

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  • Accession Number: 00385707
  • Record Type: Publication
  • Source Agency: Swedish National Road and Transport Research Institute (VTI)
  • Report/Paper Numbers: 258A Monograph
  • Files: ITRD, TRIS, ATRI
  • Created Date: Jul 30 1984 12:00AM