Rutting Performance of the SHRP SPS-9A Test Site in Saskatchewan

As part of the Strategic Highway Research Program (SHRP) Long Term Pavement Performance (LTPP) program, Saskatchewan Department of Highways and Transportation (SDHT) constructed a Specific Pavement Studies-9A (SPS-9A) test site on Highway 16 near Radisson, Saskatchewan. Seven test sections were constructed in 1996 to investigate the performance of different asphalt cement grades and mixes, and the use of recycled materials in a Superpave asphalt concrete. The test site consist of four Superpave coarse graded asphalt concrete mixes, one Superpave recycle mix, and two SDHT dense graded Marshall mixes. The University of Saskatchewan and SDHT have partnered to evaluate the field performance of the test sections and to investigate mechanistic-based design and analysis techniques. This paper discusses the rutting behavior of the test sections after seven years of field performance, based on annual surface condition ratings and periodic laboratory analysis of asphalt concrete samples. The Superpave mixes appear to have good rutting resistance, regardless of asphalt cement used, whereas the Marshall mixes seem to rely more on the properties of asphalt cement for performance. The Marshall mix that was recommended for this site under the SDHT specifications at the time of construction is performing as good as the Superpave sections.

Language

  • English

Media Info

  • Media Type: Print
  • Pagination: pp. 377-397.
  • Monograph Title: Proceedings of the Forty-Eighth Annual Conference of the Canadian Technical Asphalt Association (CTAA): Halifax, Nova Scotia, November 2003

Subject/Index Terms

Filing Info

  • Accession Number: 01604995
  • Record Type: Publication
  • Source Agency: Transportation Association of Canada (TAC)
  • Files: ITRD, TAC
  • Created Date: Jul 26 2016 5:02PM