Using Advanced Binder Rheological Parameters to Predict Cracking Potential of Hot-Mix Asphalt Mixtures with Modified Binders

Details

• Creators:
  Al-Qadi, Imad L. ; Sulaiman, Abdulgafar O. ; Ali, Uthman Mohamed ; Lang, Hong ; Mainieri, Javier Jesus Garcia
• Corporate Creators:
  Illinois Center for Transportation
• Corporate Contributors:
  Illinois Department of Transportation. Bureau of Research ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  Asphalt Mixtures Binder Modification Binder Rheology Binders Delta G Star DeltaTc Hot Mix Asphalt Pavement Cracking Polymer-Modified Binder Polymer-Softener-Modified Binder Polymer Asphalt Rheology Softener-Modified Binder

  More +
• Publication/ Report Number:
  FHWA-ICT-25-011
• DOI:
  https://doi.org/10.36501/0197-9191/25-011
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Illinois
• Edition:
  Final Report: 8/16/22 –10/31/25
• Corporate Publisher:
  Illinois Center for Transportation
• Abstract:
  This study provides insights into the complexities of asphalt binder modifications and their impact on hot-mix asphalt (HMA)cracking potential. An experimental program was developed to assess the cracking potential of HMA from binder characteristics. Various binder types, including polymer-softener-modified binders, were considered. Rheological tests were performed nonbinders at short- and long-term aging conditions. A multiple stress creep recovery test was conducted to evaluate the stress-dependent rutting potential of binder blends, while Fourier-transform infrared spectroscopy was used to evaluate oxidative aging and polymer degradation of the binder. Rheological parameters of binders were used to predict HMA cracking potential utilizing test results of the Illinois Flexibility Index Test. Statistical analyses, primarily based on multi-linear regression, were used to develop predictive models linking binder rheological properties to HMA cracking potential. The HMA flexibility index (FI) was predicted using the following binder rheological parameters: creep stiffness at 60 s (S-value), rate of stress relaxation at 60 s (m-value), asphalt binder content (BC), asphalt binder replacement (ABR), number of design gyrations (Ngyr), and Δ|G*|peak τ. For simplicity, short- and long-term aged HMA FI prediction models are based on S-value, m-value, and ABR. Three uncertainty categories of predicting FI from binder rheological parameters are introduced. The categories are associated with binder acceptance based on potential cracking risk.
• Format:
  PDF
• Funding:
  R27-250
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:4e90e62d1e05bc07d181462d13242b7274052f0b1535c154bb2bee36be21d1d8a11f83cb24926353cb31e8c739589f63219417512136c94f569f32cb425cfe1b
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/87334/dot_87334_DS1.pdf
• File Type:
  [PDF - 5.72 MB ]