COMPOSITE ASPHALT BINDERS: EFFECT OF MODIFIED RPE ON ASPHALT

This study prepared and characterized recycled polyethylene (RPE) modified asphalts. The RPE was modified with different copolymers before incorporating into the asphalt. A special morphology was found for this system. The RPE particles are highly swollen by asphalt. This morphology is attributed to physical interactions. The presence of copolymers in RPE was found to change the RPE's affinity toward asphalt constituents. Aging of asphalt, oil absorption by polymer particles, and interactions of polymer particles with asphaltenes affect the overall rheological properties of polyethylene modified asphalts. Attempts to approach the rheological behavior of polymer modified asphalt with rheological models for filled polymers were not found to be conclusive. Other specific features of asphalt must be taken into account. These include, for example, changes in the structure that were evidenced by their relaxation time spectra and molecular weight distributions. The polymer modification of asphalt affected the asphalt properties. Well controlled thermomechanical history experienced by the asphalt is needed to differentiate between the chemical changes of the binder caused by the mixing process and the beneficial effect of the polymer for high-performance asphalts.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08991561
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Yousefi, A A
  • Ait-Kadi, A
  • Roy, C
• Publication Date: 2000-5

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 113-123
• Serial:
  • Journal of Materials in Civil Engineering
  • Volume: 12
  • Issue Number: 2
  • Publisher: American Society of Civil Engineers
  • ISSN: 0899-1561
  • EISSN: 1943-5533
  • Serial URL: http://ascelibrary.org/journal/jmcee7

Subject/Index Terms

• TRT Terms: Absorption; Aging (Materials); Asphalt; Asphaltene; Binders; Composite materials; Copolymers; Creep properties; Emulsions; Ethylene resins; Melting point; Mixing; Molecular weight; Morphology; Oils; Polymers; Recycled materials; Rheological properties; Stability analysis; Tests; Viscosity
• Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00794094
• Record Type: Publication
• Contract Numbers: NSF-G-CMS-9601262, GR/J 85554
• Files: TRIS
• Created Date: Jun 25 2000 12:00AM