Liquefaction potential of reinforced sand with plastic wastes

Document Type : Article

Authors

Department of Geotechnical Engineering, Faculty of Civil Engineering, Babol Noshirvani University of Technology, Babol, Iran

Abstract

Granular soil liquefaction, due to developed pore water pressure during undrained cyclic shear of saturated soils, is regarded as a common phenomenon under earthquakes loading. This phenomenon results in the huge damage to infrastructures. Various reinforcement materials have been successfully implemented with particular attention to use waste materials to satisfy design specifications and also reducing the adverse environmental effects. This paper investigates the possibility of using waste plastic fibers as a reinforcement material to mitigate liquefaction potential and pore pressure generation of reinforced sand under cyclic loading. For this purpose, 42 stress-controlled cyclic triaxial tests were conducted on Babolsar sand, reinforced by polyethylene terephthalate (PET) and polypropylene (PP) fibers with fiber contents of 0.25%, 0.5% and 1%, under confining pressures of 50, 100 and 200 kPa, and with cyclic stress ratios (CSR) of 0.2 and 0.35. Results revealed that the addition of these waste plastic fibers could significantly increase the liquefaction resistance of Babolsar sand, and also, with an increase in the waste content, the number of cycles leading to liquefaction increased. Adding wastes decreased the pore water pressure generation, and this effect was more pronounced with an increase in the waste content.

Keywords

References

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Scientia Iranica
Volume 29, Issue 6
Transactions on Civil Engineering (A)
November and December 2022
Pages 2850-2867

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History

  • Receive Date: 21 January 2021
  • Revise Date: 29 November 2021
  • Accept Date: 13 June 2022

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