Evaluation of Isocyanate Asphalt Additive

Details

• Creators:
  Mayeux, Corey R ; Salari, Saman ; Cooper III, Samuel
• Corporate Creators:
  Louisiana Transportation Research Center
• Corporate Contributors:
  Louisiana. Department of Transportation and Development ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  • Asphalt additives
  • Binders
  • Mechanical properties
  • Pavement performance
  • Isocyanate
• Publication/ Report Number:
  FHWA/LA.22/22-01TA-B
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  Technical Assistance Final Report, 3/2021–3/2022
• Corporate Publisher:
  Louisiana State University. Louisiana Transportation Research Center
• Description:
  Modifying asphalt binder is one of the primary methods of improving the performance of asphalt mixtures; the benefits include improved rutting resistance, cracking resistance, increased durability and stripping resistance. The addition of polymer, such as styrene-butadiene-styrene (SBS), is the most common method of modifying asphalt binders; however, chemical modifiers, extenders, hydrocarbons and anti-stripping additives are also employed to improve asphalt performance. A low viscosity isocyanate-based modifier for asphalt binders has been developed which claims to improve adhesion performance in the asphalt mix. The product crosslinks components in the liquid asphalt, and claims to reduce stripping of the aggregates from the binder and make a more flexible, sustainable pavement. This research intends to evaluate the effects of the additive on liquid asphalt and compacted asphalt pavements.
• Format:
  PDF
• Funding:
  LTRC Project Number: 22-01TA-B,SIO Number: N/A
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/61576/dot_61576_DS1.pdf
• File Type:
  [PDF - 1008.29 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:f4c8131e7998c7fc40762fa366b8d5b3793196ac83139ca77afd68de9960e3a2