Effect of heavy vehicle traffic in sprayed seal design

The principal aim of this work was to examine the effect of heavy vehicle loading on sprayed seals, in order to incorporate such loading impacts into the Austroads sprayed seal design method. The current sprayed seal design method uses an equivalent heavy vehicle factor (EHV(%)) to account for the effects of heavy traffic on sprayed seals which is calculated using a simple equation using information from traffic counts. The seal design results obtained using the simple equation were compared to those obtained when EHV(%) values were determined using a detailed analytical method that utilised weigh-in-motion (WIM) data and seal deterioration models. WIM data was obtained from rural areas of Australia between 2007 and 2011. Four seal design examples were used to compare the different EHV(%) calculation methods. There was either none of very little variation in EHV(%) values when the different methods of calculation were used. This resulted in either none or insignificant variations to the design binder application rates determined by the method (if expected construction tolerances were considered). Considering the increased complexity associated with the WIM-based methods, it appears that the current simple equation to determine EHV(%) will yield results which are suitable for use in the Austroads sprayed seal design method. A comparison of the results obtained using the simple equation to calculate EHV(%), and a commonly used alternative interpretation also indicated that the use of either method had minimal effects on design binder application rate.

Language

  • English

Media Info

  • Pagination: 50p

Subject/Index Terms

Filing Info

  • Accession Number: 01607889
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 9781925451160
  • Report/Paper Numbers: AP-T307-16
  • Files: ITRD, ATRI
  • Created Date: Aug 22 2016 10:32AM