Using the bending beam rheometer for low temperature testing of asphalt mixtures : final report.

Details

• Creators:
  Romero, Pedro
• Corporate Creators:
  University of Utah. Department of Civil and Environmental Engineering
• Corporate Contributors:
  Utah. Dept. of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Asphalt mixtures
  • Field studies
  • Low temperature tests
  • Performance tests
  • Test procedures
  • Rheometers
  • asphalt concrete
  • pavement
  • thermal cracking
  • bending beam rheometer
  More +
• Publication/ Report Number:
  UT-16.09
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  Final report
• Corporate Publisher:
  Utah. Department of Transportation
• Abstract:
  This work showed that the bending beam rheometer is a viable test to determine the low temperature performance of ; asphalt mixtures; it balances the rigor required of any mechanical test and the relation to field performance with the ; practicality of a procedure that can be easily adopted. The protocols developed parallel existing asphalt binder ; protocols thus allowing for easy implementation since they are based on robust and commercially available ; equipment that requires no modification. ; It was shown that the size of the beams used for this test are a representative volume element. Mixtures with ; nominal maximum aggregate size of ½” or even larger can be tested without large aggregates introducing any ; further variability. The size of the beams also allows for multiple specimens obtained from either gyratory ; compacted samples or field cores; agencies and contractors can test mixtures and compared results as the difference ; between two labs was determined to be less than 10 percent for the modulus and about 20 percent for the m-value. ; Finally, based on field performance measurements, it was determined that both creep modulus and m-value are ; needed to determine the low temperature performance of asphalt pavements. These values can be visually presented ; in a Black Space diagram. Mixtures with high modulus and low m-values are expected to show poor performance ; but mixtures with high modulus AND high m-value should have better performance, perhaps allowing for better ; performing asphalt mixtures at both low and high temperatures. ; The benefits found from using the BBR to test small beams of asphalt mixtures indicate that this is an ideal test to ; evaluate the low temperature performance of asphalt mixtures.
  More +
• Format:
  PDF
• Funding:
  15-8542 ; PIC No. UT14.107
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/31113/dot_31113_DS1.pdf
• File Type:
  [PDF - 5.10 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:bbfb4023cfe91170ac8c51d0c9cf5aec54520282ecdbccc2ba7679ae989fc76d