Performance of asphalt and spray grade PMBs in sprayed seals

The Australian polymer modified binder (PMB) specification (AGPT/T190) currently requires different binder grades to be used in sprayed sealing and asphalt applications. This study compared the sprayed seal performance of PMBs representing four AGPT/T190 grades (i.e. S20E, A20E, S25E and A15E) to determine whether the use of S20E or A20E grade PMBs, or S25E or A15E grade PMBs, had a significant effect on sprayed seal performance. This work was conducted to complement asphalt performance comparison work which was performed using the same binders in 2017–18. Samples of each of the representative PMBs were subjected to four different laboratory sprayed seal performance tests which represented different stages in the construction/life of a sprayed seal. The results of these tests appeared to indicate that S20E and A20E grade PMBs, as well as S25E and A15E grade PMBs, would be expected to perform similarly in sprayed seals. Based on the results of sprayed seal performance comparisons, and asphalt performance comparisons conducted in 2017–18, it appears feasible to merge the S20E and A20E PMB grades, as well as the S25E and A15E PMB grades, in an updated version of AGPT/T190. Specification requirements have been proposed for the merged PMB grades.

Media Info

  • Pagination: 79p

Subject/Index Terms

Filing Info

  • Accession Number: 01711762
  • Record Type: Publication
  • Source Agency: ARRB Group Limited
  • ISBN: 9781925854220
  • Report/Paper Numbers: AP-T345-19
  • Files: ITRD, ATRI
  • Created Date: Jul 22 2019 8:05AM