Use of Innovative Recycling Agents for Improving the Sustainability and Durability of Asphalt Pavement [Summary]

Details

• Creators:
  Mohammad, Louay N. ; Elnaml, Ibrahim
• Corporate Creators:
  Louisiana Transportation Research Center ; Louisiana State University
• Subject/TRT Terms:
  • Asphalt mixtures
  • Durability
  • Binder content
  • High performance concrete
  • Iron oxides
• Publication/ Report Number:
  716
• Resource Type:
  Brief
• Geographical Coverage:
  United States
• Edition:
  Technical Summary
• Corporate Publisher:
  Louisiana Transportation Research Center
• Abstract:
  The use of reclaimed asphalt pavement (RAP) as a partial replacement for virgin aggregates and asphalt binders has received considerable attention in recent years due to its economic and environmental benefits. These benefits include a potential reduction in asphalt mixture cost and the promotion of sustainability. However, many state Departments of Transportation are cautious in adopting high RAP content (>25%) into their asphalt mixture designs because of cracking and durability issues resulting from the aged RAP binder. This study considered two approaches to mitigate concerns regarding hardened and oxidized aged RAP binders: (1) reagent catalyst (Lewis acid type—iron chloride, FeCl3) to modify the asphalt binder’s chemical composition and disrupt the associated molecules formed in the aged RAP binder; and (2) the application of petroleum-based and bio-derived recycling agents (RAs) to improve the cracking resistance of asphalt mixtures containing aged RAP binder (>25%).
• Format:
  PDF
• Funding:
  SIO No. DOTLT1000392, 21-3B
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/86849/dot_86849_DS1.pdf
• File Type:
  [PDF - 151.74 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:fb683778f963c6192a122f0c22599fade702e3b0ae3cf84e48428a0d0a4ab88d9f0c7bab9b424fbbf2de8c25510691796b8f66c0a3293911fadd27dbd447e09b