Evaluation of Fly-Ash-Treated Reclaimed Asphalt Pavement for the Design of Sustainable Pavement Bases: An Indian Perspective

Rising costs and scarcity of natural materials such as aggregates are forcing highway agencies to look for alternate pavement designs for new construction, maintenance, and rehabilitation. Several states in the United States are currently allowing the use of reclaimed asphalt pavement (RAP) combined with cement for a stabilized base course under both asphalt and concrete pavements. India has very limited experience with recycling and reuse of RAP in various layers of pavement structure. The main objective of the present research is to evaluate the use of reclaimed aggregates from older pavements with addition of stabilizers to improve the pavement performance with long-lasting and reduction of asphalt course, thus reducing the carbon footprint. RAP samples were collected from an ongoing project site, and the specimens are prepared with RAP as principal component. Fly ash is used as the stabilizer, and the mixes are evaluated in the laboratory for strength and stiffness along with resilient modulus studies. The fly ash-stabilized RAP base layer significantly improved the resilient behavior at 30% fly ash replacement by weight. Further increase in fly ash content reduced the performance.

Language

  • English

Media Info

  • Media Type: Web
  • Features: References;
  • Pagination: pp 3676-3685
  • Monograph Title: Geo-Congress 2014 Technical Papers: Geo-Characterization and Modeling for Sustainability

Subject/Index Terms

Filing Info

  • Accession Number: 01522488
  • Record Type: Publication
  • ISBN: 9780784413272
  • Files: TRIS, ASCE
  • Created Date: Mar 25 2014 3:08PM