Improving the Mechanical Properties of Cold Mix Asphalt Mixtures Reinforced by Natural and Synthetic Fibers

The enhancement of the performance of flexible pavements by reinforcing asphalt mixtures is considered valuable because of the negative environmental conditions and heavy loads pavements endure resulting in the unsatisfactory performance of conventional mixtures. This research investigates the mechanical properties of cold mix asphalt (CMA) mixtures reinforced by natural (coir) and synthetic (glass) fibers, the main aim being to develop and optimise a high performing CMA mixture for use as a surface course, incorporating natural and synthetic fibers, which could be used in place of hot mix asphalt (HMA) in any situation. Laboratory investigations were performed to measure and evaluate the mechanical properties of reinforced and unreinforced mixtures with different fiber types, contents and lengths. These investigations included the indirect tensile stiffness modulus test, uniaxial creep test, wheel tracking tests and water sensitivity in terms of indirect tensile strength. The results revealed a considerable improvement in the mechanical properties of CMA specifically because of the high stiffness and tensile strength properties of the fibers used. Due to these improvements, rutting resistance and structural resistance to distress occurring in asphalt pavements and pavements service life, may be enhanced.

Language

  • English

Media Info

  • Media Type: Web
  • Features: Figures; References; Tables;
  • Pagination: pp 102-111
  • Monograph Title: Airfield and Highway Pavements 2017: Pavement Innovation and Sustainability

Subject/Index Terms

Filing Info

  • Accession Number: 01687706
  • Record Type: Publication
  • ISBN: 9780784480946
  • Files: TRIS, ASCE
  • Created Date: Oct 4 2018 4:34PM