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 Concrete Asphalt Mixtures Bending Beam Rheometer Field Studies Low Temperature Tests Pavement Performance Testing Performance Tests Rheometers Test Procedures Thermal Cracking

  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.
  
  
• Format:
  PDF
• Funding:
  15-8542 ; PIC No. UT14.107
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:bbfb4023cfe91170ac8c51d0c9cf5aec54520282ecdbccc2ba7679ae989fc76d
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/31113/dot_31113_DS1.pdf
• File Type:
  [PDF - 5.10 MB ]