Performance Oriented Guidance for Mississippi Chip Seals-Volume I

A five year laboratory study was conducted to investigate near surface properties of flexible pavements in relation to how they are affected by bituminous surface treatments. Chip seals and scrub seals (a specialized type of chip seal) were the focus of the study. Seven emulsions, three aggregates, and four asphalt pavement types were tested. The overall objective was to provide Mississippi Department of Transportation (MDOT) with performance oriented guidance for chip seals. This overall objective was divided into aggregate retention and rejuvenation of the existing pavement’s near surface. Repeated creep of mixture bars, viscosity change of recovered binder, and Bending Beam Rheometer (BBR) mixture beam responses were used to assess rejuvenation effects of chip seals on a pavement’s near surface. Vialit adhesion, frosted marble, and sweep testing were used to assess aggregate retention behavior. Within the six test methods studied, some were used without modification, while others were modified during this research. Over 2,000 experiments were performed for this report. Key rejuvenation testing included: 24 repeated creep torsion bars, 168 viscosity change measurements, and 959 BBR mixture beams. Key aggregate retention testing included: 231 Vialit trays, 221 frosted marble trays, and 533 sweep pads. Key performance oriented recommendations included: requiring a minimum m-value increase of a BBR mixture beam due to emulsion application when rejuvenation is of high importance, monitoring moisture loss of a chip seal system for traffic opening determination, and specifying chip seal systems (i.e. aggregate and emulsion) as opposed to independently approving chip seal materials.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Figures; Photos; References; Tables;
  • Pagination: 191p

Subject/Index Terms

Filing Info

  • Accession Number: 01529341
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/MS-DOT-RD-13-211-Volume I
  • Files: TRIS, ATRI, USDOT, STATEDOT
  • Created Date: Jun 19 2014 3:19PM