Tack Coat Field Acceptance Criterion

Recently, the Texas Department of Transportation (TxDOT) has experienced an increase in the number of pavement failures that may be attributed to the poor quality of tack coat applied. To identify the quality of the tack coat before an overlay is placed on top of it, a device [UTEP Pull-off Device (UPOD)] that measures the quality of the tack coat has been developed. The device is placed on top of the tack coat layer after a specified interval and the quality of the tack coat is evaluated based on the magnitude of cohesive strength. The developed device is simple, reliable, economical, and could determine the quality of the tack coat in less than 45 minutes after tack coat application. Although the UPOD can measure the quality of the tack coat, a field acceptance criterion has not been established and is the objective of this research. To develop the criterion, laboratory and field tests were performed with the help of TxDOT. Based on the laboratory and field test results, an acceptance criterion has been proposed.

Language

  • English

Media Info

  • Media Type: Web
  • Edition: Technical Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 73p

Subject/Index Terms

Filing Info

  • Accession Number: 01047564
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/TX-06/0-5216-1, Research Report TX-0-5216-1
  • Contract Numbers: 0-5216
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: May 1 2007 4:02PM