High Friction Surface Treatment Deterioration Analysis and Characteristics Study

High Friction Surface Treatment (HFST) has been used in more than 40 states in the U.S. to improve friction on curved roadways with wet crashes history. However, observations on HFST section at National Center for Asphalt Technology (NCAT) Test Track showed friction dropped suddenly at HFST’s end of life creating unsafe driving condition. There is no observed friction deterioration trend to predict this friction drop when using friction performance measures like skid number (SN), obtained using locked-wheel skid tester. Therefore, there is an urgent need to explore and develop alternative HFST safety performance measures like aggregate loss that can correlate to friction, whose deterioration is predictable, cost-effective and easily measurable. The objectives of this paper are to 1) analyze the correlation between HFST aggregate loss percentage and friction value using Dynamic Friction Tester, and 2) study the characteristics of the HFST deterioration associated with aggregate loss, at NCAT Test Track and selected HFST curve sites in Georgia with 2D imaging and high-resolution 3D laser scanning at macro- and microscopic scales. Results show a strong linear correlation between HFST aggregate loss percentage and friction value. Aggregate loss is easily identified by characteristics such as color and 3D range values. HFST aggregate loss percentage is recommended as an alternative performance measure for monitoring the HFST safety performance deterioration (traditionally friction is used as the safety performance measure). In addition, preliminary texture analysis shows Mean Profile Depth (MPD} and Ridge-to-Valley Depth (RVD) texture indicators can clearly identify loss of aggregate spot in HFST surface using 3D range images.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Maps; Photos; References; Tables;
  • Pagination: 19p

Subject/Index Terms

Filing Info

  • Accession Number: 01764453
  • Record Type: Publication
  • Report/Paper Numbers: TRBAM-21-02720
  • Files: TRIS, TRB, ATRI
  • Created Date: Dec 23 2020 11:05AM