Investigation of Hot Mix Asphalt Aging Effect on Mechanical Properties of Mixes Based on Their Binder Performance Results

Details

• Creators:
  Abdallah, Imad ; Montoya, Miguel A. ; Mohajeri, Zahra
• Corporate Creators:
  University of Texas at El Paso. Center for Transportation Infrastructure Systems
• Corporate Contributors:
  The Southern Plains Transportation Center (SPTC) Region 6 University Transportation Center (UTC) ; United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
• Subject/TRT Terms:
  Aging (Materials) Bituminous Binders Cracking Of Asphalt Concrete Pavements Hot Mix Asphalt Mechanical Properties Rheological Properties
• Publication/ Report Number:
  CY1-UTEP-02
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  Final Report (September 2023 - October 2024)
• Corporate Publisher:
  The Southern Plains Transportation Center (SPTC) Region 6 University Transportation Center (UTC)
• Abstract:
  Developing recommendations to enhance the aging resistance of hot mix asphalt (HMA) pavement layers is essential due to the complex aging process that affects their physical and chemical properties over time. This study investigated the impact of long-term aging on HMA mechanical characteristics, such as cracking resistance, rheological performance, and chemical characteristics of associated binders. Binders were extracted and recovered from laboratory-aged HMA specimens previously prepared under a study at the University of Texas at El Paso (UTEP). These specimens included varying proportions of reclaimed asphalt pavement (RAP), binder contents, aggregate gradations, and additive dosages. While the previous work extensively recorded the cracking performance of these specimens using the Overlay Tester, no rheological and chemical testing was conducted on the recovered binders. This research filled the gap by determining the rheological and chemical properties of the recovered binders and analyzing how aging influences binder performance as a function of mixed variables. The outcomes of this study will support the development of optimized mix designs with enhanced aging resistance. Recommendations are provided for improving mix design criteria, enabling the construction of pavements with extended lifespans and superior performance under aging conditions.
• Format:
  PDF
• Funding:
  69A3552348306
• Collection(s):
  University Transportation Centers
• Main Document Checksum:
  urn:sha-512:ed995f0e6308ea0d3820074c47d6d97c153b4de11d1cfddce27d0d23e09170d00e14f670f59a25c7cd360b236f720e5d2e3512abe524a30490355bfffb089d5e
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/88286/dot_88286_DS1.pdf
• File Type:
  [PDF - 10.83 MB ]