An experimental investigation of the independent effect of suction and degree of saturation on very small-strain stiffness of unsaturated sand

Arianna Pagano, Alessandro Tarantino, Meghdad Bagheri, Mohammad Rezania, Phillippe Sentenac

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Abstract

The paper presents an experimental investigation of very small strain stiffness of unsaturated sand. A triaxial test apparatus was equipped with bender elements and compression discs in order to assess the stiffness at very small strains by measuring the velocity of propagation of shear and compression waves through an unsaturated sample. The negative water column method was adopted to apply suction at the base of the sample. The experiments were designed to investigate the independent effect of suction and degree of saturation on the wave propagation velocities. This was achieved by testing the sand sample on both the drying and wetting path.

Original languageEnglish
Article number14015
Number of pages4
JournalE3S Web of Conferences
Volume9
DOIs
Publication statusPublished - 12 Sep 2016

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Keywords

  • suction
  • saturation
  • sand
  • soil stiffness
  • geotechnical structures

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