Performance Oriented Guidance for Mississippi Chip Seals-Volume II

A laboratory and field study was conducted related to long term chip seal performance. This report’s primary objective was to initiate development of a long term performance (LTP) test protocol for chip seals focused on aggregate retention. Key components of the study were to: 1) develop laboratory equipment and protocols to place a chip seal onto asphalt concrete; 2) develop laboratory equipment and protocols to evaluate chip seal aggregate loss placed onto asphalt concrete; 3) monitor chip sealed pavements from construction through two years of service life while collecting cores to be tested for aggregate loss in the laboratory; 4) compare laboratory produced chip seals to cores taken from in service pavements when using the same aggregates and emulsion. The study evaluated two pavements: Highway (Hwy) 366 near Baldwyn, Mississippi (Size 89 aggregates), and Hwy 44 near Hattiesburg, MS (Size 7 aggregates). The primary objective was met, though the effort stopped short of long term performance prediction of in service chip seals. The primary conclusion from this report was that fabricating chip seals in the laboratory that represent those placed in the field was feasible to some extent. Chip seals fabricated using the equipment developed in this research with Size 7 aggregates and corresponding embedment/conditioning protocols did represent field applied chip seals taken from Hwy 44 6 days after construction. Chip seals fabricated using the equipment developed in this research with Size 89 aggregates and corresponding embedment/conditioning protocols did not represent field applied chip seals taken from Hwy 366 10 days after construction.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Figures; Photos; References; Tables;
  • Pagination: 78p

Subject/Index Terms

Filing Info

  • Accession Number: 01529282
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/MS-DOT-RD-13-211-Volume II
  • Files: TRIS, ATRI, USDOT, STATEDOT
  • Created Date: Jun 19 2014 3:20PM