Cement-Stabilized Fly Ash for Application in Structural Layers of Low-Volume Road Pavements

Fly ash, with an estimated production of about 200 million tons per year in India and maximum usage of 60% is demanding large disposal areas and also posing a potential threat to water pollution by leaching of heavy metals present in it. In the present study, an attempt has been made to use fly ash (FA) and stone dust (SD) mixture (70:30 ratio) stabilized with cement, as a structural layer material for use in rural road pavements. To address the brittleness of the stabilized material, polypropylene fibers were added as reinforcing material. Mechanical properties of the stabilized material, in terms of unconfined compressive strength (UCS), flexural strength (FS), flexural modulus (FM), and Poisson’s ratio, were evaluated to assess the suitability of the material for use in pavement layers. Fatigue characteristic of the stabilized material was also evaluated as part of this study. Durability tests indicated adequate retained strength of the stabilized mixture. The scope for contamination of groundwater was evaluated through leaching of heavy metals from stabilized FA. The encouraging results found from this study indicate that, cement-stabilized FA–SD mix can be suitably used for the construction of subbase and base layers of rural road pavements.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 390-403
  • Monograph Title: 12th International Conference on Low-Volume Roads
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01732665
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Mar 3 2020 4:02PM