Assessing Presence and Impact of REOB (Recycled Engine Oil Bottoms) on Asphalt (1.19)

Asphalt material producers sometimes incorporate Recycled Engine Oil Bottoms (REOB) into paving asphalt in order to alter its performance grade (PG). State Departments of Transportation express concern that REOB decreases pavement lifetime, even though it does not violate the specifications that are intended to ensure good performance. This research project assesses REOB in asphalt through two complementary approaches: (1) experimental measurements to detect presence of REOB in asphalt binders used in Rhode Island, and (2) molecular simulations to quantify mechanisms about how REOB alters asphalt mechanics, meaning viscosity and complex modulus G*. Prior work at URI has indicated that Inductively Coupled Plasma Mass Spectroscopy (ICP-MS) can identify REOB presence while simultaneously suggesting a metalbased fingerprint of asphalt chemistry. Other prior work at URI has developed nanoscale model systems that replicate asphalt properties within molecular dynamics simulations. In this project, the intent of approach (1) is to provide ICP-MS experimental data that complement simultaneous development at RIDOT of a REOB detection approach based on X-ray fluorescence (XRF). The intent of approach (2) is to identify rheological distinctions to anticipate between systems with and without REOB. Such perspectives can then be applied toward interpreting effects of REOB on measured asphalt DSR data and can guide rheology studies in future work.

• Record URL:
  • https://www.tidc-utc.org/kb/1-19-uri/

Language

• English

Project

• Status: Active
• Funding: $153121
• Contract Numbers:

  69A3551847101

• Sponsor Organizations:

  Office of the Assistant Secretary for Research and Technology

  University Transportation Centers Program
  Department of Transportation
  Washington, DC  United States  20590

  Rhode Island Department of Transportation

  Two Capitol Hill
  Providence, RI  United States  02903-1124

  University of Rhode Island, Kingston

  Department of Civil and Environmental Engineering
  Kingston, RI  United States  02881
• Managing Organizations:

  Transportation Infrastructure Durability Center

  University of Maine
  Orono, ME  United States  04469

  Office of the Assistant Secretary for Research and Technology

  University Transportation Centers Program
  Department of Transportation
  Washington, DC  United States  20590

  Rhode Island Department of Transportation

  Two Capitol Hill
  Providence, RI  United States  02903-1124
• Project Managers:

  Dunn, Denise

• Performing Organizations:

  Transportation Infrastructure Durability Center

  University of Maine
  Orono, ME  United States  04469

  University of Rhode Island, Kingston

  Department of Civil and Environmental Engineering
  Kingston, RI  United States  02881

  Rhode Island Department of Transportation

  Two Capitol Hill
  Providence, RI  United States  02903-1124
• Principal Investigators:

  Greenfield, Michael

• Start Date: 20220606
• Expected Completion Date: 20250331
• Actual Completion Date: 0
• USDOT Program: University Transportation Centers Program

Subject/Index Terms

• TRT Terms: Asphalt additives; Bituminous binders; Engine oils; Pavement performance; Recycled materials; Residual oils; Rheology; Road construction; Service life
• Geographic Terms: Rhode Island
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01851439
• Record Type: Research project
• Source Agency: Transportation Infrastructure Durability Center
• Contract Numbers: 69A3551847101
• Files: UTC, RIP
• Created Date: Jul 15 2022 2:34PM