Low and Intermediate Temperature Evaluation of Asphalt Binders Through Dynamic Shear Rheometer

Details

• Creators:
  Salari, Saman ; Cooper, Samuel B.
• Corporate Creators:
  Louisiana Transportation Research Center
• Corporate Contributors:
  Louisiana. Department of Transportation and Development ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  Analysis Of Variance Asphalt Beams Bending Bending Beam Rheometer (BBR) Binders Data Analysis Dynamic Shear Rheometer (DSR) Evaluation Low-temperature Performance Grade Of Asphalt Binder Low Temperature Performance Rheometers

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• Publication/ Report Number:
  FHWA/LA.26/717
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Louisiana
• Edition:
  Final Report
• Corporate Publisher:
  Louisiana Transportation Research Center
• Abstract:
  The low-temperature properties of asphalt binder play a critical role in the behavior and performance of flexible pavements. Since the 1990s, the Bending Beam Rheometer (BBR) has been the standard instrument for characterizing these properties. However, BBR testing requires time-consuming sample preparation and extensive equipment maintenance. Despite advancements in asphalt binder characterization and more efficient testing processes, the conventional BBR is still primarily used for low-temperature characterization. Recently, new methods using a Dynamic Shear Rheometer (DSR) have been developed to assess the low-temperature performance characteristics of asphalt binders. This study compared conventional BBR test results with two DSR-based methods: the Incremental Creep at Low Temperature (iCCL) and the Ultra-Thin Film Oven (UTFO) methods, developed by Pavement Systems LLC and the Western Research Institute (WRI), respectively. The results of the DSR low-temperature grades are practically similar to the low-performance grade from the BBR; however, an Analysis of Variance (ANOVA) on the continuous grades reveals a significant difference between the two approaches. Ultimately, this research finds that the reliability of the WRI, iCCL, and UTFO methods is limited within conventional low-temperature grades (between -22°C and -25°C) and deviates further from BBR results as the temperature grade decreases.
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:d7f70b6c8bdfe714507ecfb12eac16d84b9f36c9f94674ca52a8f06b66c2c1cc6f75c9ad0e81f2d81ed0d35555a595e2ddf64413bb60f8a2264e4bc29e872d98
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/91166/dot_91166_DS1.pdf
• File Type:
  [PDF - 764.60 KB ]