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Use of moisture induced stress testing to evaluate stripping potential of hot mix asphalt (HMA).

File Language:
English


Details

  • Creators:
    Pinkham, Rudy Ellyn ; Cote, Sarah Ann ; Mallick, Rajib B. ; Tao, Mingjiang ; Bradbury, Richard L. ; Regimand, Ali
  • Corporate Creators:
    Worcester Polytechnic Institute. Dept. of Civil and Environmental Engineering
  • Subject/TRT Terms:
  • Publication/ Report Number:
    43077
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Maine
  • Corporate Publisher:
    Maine. Dept. of Transportation
  • Abstract:
    Stripping of hot mix asphalt (HMA) in the field is an ongoing issue for many Departments of Transportation ; (DOTs). A leading cause of stripping is hydraulic scouring. The Moisture Induced Stress Tester (MIST) is a recently ; developed technology that applies alternating pressure and vacuum cycles to submerged asphalt samples to mimic ; hydraulic scouring. The objective of this study was to differentiate six HMA mixes used by Maine DOT in terms of ; their moisture susceptibility using the latest MIST technology and field cores. Half of the field cores were ; conditioned in the MIST. Before and after conditioning visual observations were made, and the bulk specific gravity ; and resilient modulus were determined using the CoreLok and ASTM D4123, respectively. All conditioned and ; unconditioned samples were tested for indirect tensile strength (ITS) in accordance with ASTM D 6931. Values ; from before and after conditioning were compared by HMA mix. It was determined that the MIST conditioning ; process does cause moisture damage to the samples in a manner that mimics hydraulic scouring. It is recommended ; that further research be carried out to investigate the effect of the MIST on HMA cores, and that parameters be ; developed for characterizing the results of the MIST conditioning process. These results would also help in the ; development of standard specifications for the use of MIST.
  • Format:
    PDF
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/27825/dot_27825_DS1.pdf
  • File Type:
    Filetype[PDF - 342.52 KB]
  • Collection(s):
    US Transportation Collection
  • Main Document Checksum:
    urn:sha256:67ab987025ccb0ad64038bb5a9375e3ade19b245c106d79ccdbee7b8e72234dd
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