Accelerated Aging of Asphalt by UV-Oxidation

One of the primary mechanisms in which asphalt binder and asphalt pavement undergoes aging is oxidation. Oxidative aging can be categorized as either thermal oxidation, which occurs primarily during mixing, transporting, and placement, or ultra violent (UV) oxidation which occurs throughout the lifetime of the pavement due to solar irradiance. This project aims to further investigate the UV-oxidation of asphalt binder. Through experimental tests on thin asphalt binder specimens and an analytical investigation of actual in-field UV-irradiance measurements, a link will be made between laboratory accelerated aging due to UV-oxidation and in-service aging that occurs during the service life of a pavement. UV fluorescent lamps will be used to expose thin asphalt binder samples to UV radiation and the extent of UV-oxidation will be evaluated using a rotational viscometer. As asphalt binder oxidizes it begins to stiffen due to the formation of new functional groups including carbonyls and sulfoxides. This chemical change significantly alters the asphalt binder’s rheological properties, including an increase in the viscosity which leads to a higher susceptibility to fatigue cracks and pavement deterioration

• Record URL:
  http://www.utrc2.org/research/projects/accelerated-aging-asphalt-uv-oxidation

Language

• English

Project

• Status: Completed
• Funding: $23663
• Contract Numbers:

  49198-18-28

• Sponsor Organizations:

  Office of the Assistant Secretary for Research and Technology

  University Transportation Centers Program
  Department of Transportation
  Washington, DC  United States  20590
• Managing Organizations:

  University Transportation Research Center

  City College of New York
  Marshak Hall, Suite 910, 160 Convent Avenue
  New York, NY  United States  10031
• Project Managers:

  Eickemeyer, Penny

• Performing Organizations:

  Manhattan College

  Bronx,   United States 
• Principal Investigators:

  Hochstein,  Daniel

• Start Date: 20160901
• Expected Completion Date: 20180331
• Actual Completion Date: 0
• USDOT Program: University Transportation Centers

Subject/Index Terms

• TRT Terms: Aging (Materials); Asphalt pavements; Binders; Fatigue cracking; Oxidation; Rheological properties; Ultraviolet radiation; Viscosity
• Subject Areas: Design; Highways; Materials; Pavements;

Filing Info

• Accession Number: 01612650
• Record Type: Research project
• Source Agency: University Transportation Research Center
• Contract Numbers: 49198-18-28
• Files: UTC, RIP
• Created Date: Oct 3 2016 3:24PM