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Evaluation of dynamic shear rheometer tests for emulsions : [tech summary].

File Language:
English


Details

  • Creators:
    Wasiuddin, N. ; King, Bill
  • Corporate Creators:
    Louisiana Transportation Research Center
  • Subject/TRT Terms:
  • Publication/ Report Number:
    SIO No. 30000163 ; LTRC Project No. 11-2B
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Louisiana
  • Corporate Publisher:
    Louisiana Transportation Research Center
  • Description:
    Currently, the Louisiana Department of Transportation and Development (DOTD) requires ductility tests at 25°C according to

    AASHTO T51 for emulsions, force ductility ratio at 4°C, and elastic recovery at 10°C according to AASHTO T300 and AASHTO

    T301, respectively, for polymer modifi ed emulsions. The fact that polymer-modifi ed asphalt is strain dependent creates questions

    regarding purchase specifi cations based on constant strain controlled tests. In developing performance grade (PG) specifi cations 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 test 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
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/22313/dot_22313_DS1.pdf
  • File Type:
    Filetype[PDF - 124.85 KB]
  • Collection(s):
    US Transportation Collection
  • Main Document Checksum:
    urn:sha-512:0d8c7c8b31c0ca121688099698c54fb91385d341e36ce476bbde9e21371e3676e83f304ac0d080b9b3a993f693fef41fd5ec4e4769b13530bd5a1adf58400543
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