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Evaluation of dynamic shear rheometer tests for emulsions : research project capsule.

File Language:
English


Details

  • Creators:
  • Corporate Creators:
    Louisiana Transportation Research Center
  • Subject/TRT Terms:
  • Publication/ Report Number:
    11-2B
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Louisiana
  • Corporate Publisher:
    Louisiana Transportation Research Center
  • Abstract:
    Currently, the Louisiana Department of Transportation and Development (LADOTD)

    requires ductility tests at 25°C according to AASHTO T51 for emulsions and two

    other tests, namely force ductility ratio at 4°C and elastic recovery at 10°C

    according to AASHTO T300 and AASHTO T301, respectively, for polymer modified

    emulsions. The fact that polymer modified asphalt is strain dependent creates

    questions regarding purchase specifications based on constant strain controlled

    tests. In developing performance grade (PG) specifications for emulsions, one of the

    tests proposed in several reports is the multiple stress creep recovery (MSCR) test

    according to ASTM D7405. This test determines percent elastic recovery and non-recoverable creep compliance and measures the damage behavior in the linear and

    nonlinear range. Compared with the current binder protocol, a repeated creep tests

    protocol (or some other method that varies the frequency and strain and measures

    the accumulated permanent strain of the binder) represents an improvement in the

    theoretical and practical concepts that will better rate the binder properties related

    to performance.

  • Format:
    PDF
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:2cec499bb523887d10b51cd1d9839c971a556d02fb64b4f95defbb948c482d6b3c370f4c1d5acf9d7a1b20c51e4eb5af9e609bcda11b46a69b98a5543d5ee728
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  • File Type:
    Filetype[PDF - 172.56 KB ]
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