This paper presents the results of a comparative study of two automated pavers used during construction of sections of the hume freeway in Victoria, Australia. The pavers were a cmi autograde paver and an abg paver fitted with a locally produced system for level control, called a paveset grade control system (pgcs). For the purpose of comparing pavement rideability and road surface unevenness characteristics, the arrb high speed profilometer was used to take longitudinal road profile measurements on a number of test sections produced by the two pavers. Standard naasra roughness measurements were also taken during profile measurement. However, they were of limited use because of differences in the lengths of test sections and because the variations in the roughness were moderate along each test section. Preliminary analyses using profile based iri revealed statistically significant differences in iri roughness between the two pavers. Test sections with higher roughness, ie, poorer rideability, were produced by the abg paver with the pgcs. Detailed analysis of the profile data in both the spatial domain and spatial frequency domain identified the nature of the differences revealed by the iri roughness comparisons. The primary differences in road profile produced by the pavers appear to be confined to wavelengths of either less than about 0.5m or greater than about 2.5m. Increased roughness in the short wavelength range is associated with the cmi autograde paver and has been attributed to the pavement surface trimming operation. Increased roughness in the long wavelength range associated with the abg paver with pgcs appears to be due to characteristics of the levelling beam, which does not seem to adequately filter profile roughness components affecting pavement rideability. An analytical investigation into the response characteristics of the levelling beam is included (Author/TRRL)

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  • Accession Number: 00499038
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ITRD, TRIS, ATRI
  • Created Date: Sep 30 1990 12:00AM