Use of Glass Fibers in Bituminous Mixes for Retardation of Reflection Cracks in Composite Pavements

In order to improve the performance of roads and to match the quality of road with constantly increasing traffic, there is a need to shift the focus from traditional flexible and rigid pavement to composite pavement. Laying of bituminous mix layers over cracked concrete surfaces is, no doubt, a most effective solution, but the propagation of reflection crack over the surface of overlaid layers from underlying cracked surfaces is a major concern. Glass fibers can be used as an additive in the overlaying bituminous concrete layers to retard the propagation of the reflection cracks from the underlying cracked concrete slabs. To investigate the behavior of glass fiber-modified bituminous mixes, a study has been carried out to determine the feasibility of glass fibers in retarding the propagation of reflection crack on overlaid bituminous surfaces. A composite sample section with concrete base and bituminous overlay was prepared and tested with large size wheel tracking machine to evaluate the number of passes required to observe the reflection crack on the top surface of bituminous overlay. Apart from this, samples were prepared with and without glass fibers and were tested for fatigue life, skid resistance and rutting resistance. It is found that the addition of glass fibers enhanced the stiffness of bituminous mix and resistance to permanent deformation. The glass fiber modified mixes have shown improvement in fatigue characteristics and produced higher tensile strength. With the usage of glass fiber, the Marshall stability increased by 8% and retained tensile strength improvement by 11%. The fatigue life was enhanced by 40%, and rut depth reduced by 30% and propagation of reflection cracks delayed by 77% more number of cycles as compared to mixes without glass fiber.

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  • Supplemental Notes:
    • Abstract reprinted with permission from the publisher.
  • Authors:
    • Shukla, Manoj Kumar
    • Sangita
    • Chandra, Satish
    • Verma, Shashi Kant
  • Publication Date: 2018-1

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 27-33
  • Serial:
    • Indian Highways
    • Volume: 46
    • Issue Number: 1
    • Publisher: Indian Roads Congress
    • ISSN: 0376-7256

Subject/Index Terms

Filing Info

  • Accession Number: 01685525
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 5 2018 2:18PM