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Characterizing the effect of fines content on the small strain shear modulus of sand-silt mixtures during hydraulic hysteresis

Jebeli, M ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1007/978-3-030-77234-5_69
  3. Publisher: Springer Science and Business Media Deutschland GmbH , 2022
  4. Abstract:
  5. Small strain shear modulus, Gmax, is one of the most important parameters for the characterization of the behavior of earth structures subjected to static or dynamic loading conditions. This research presents an experimental laboratory study on the effect of non-plastic fines content and hydraulic hysteresis on the Gmax of unsaturated sandy soils. In this regard, clean Firoozkuh No. 161 silica sand which is classified as poorly graded sand was mixed with different percentages of non-plastic Firoozkuh silt. A set of bender element tests were carried out using two modified triaxial devices. The modifications on these two apparatus were to add HAV ceramic discs for air–water control of unsaturated specimens, in addition to including piezoelectric bender elements to send and receive shear waves and measure their velocities within the unsaturated silt-sand mixtures. Axis translation technique was implemented for hydromechanical purposes and bender element for shear wave velocity measurements and calculating Gmax. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG
  6. Keywords:
  7. Bender element test ; Fines content ; Hydraulic hysteresis ; Small strain shear modulus ; Dynamic loads ; Elastic moduli ; Hysteresis ; Mixtures ; Shear strain ; Shear waves ; Silica ; Silica sand ; Silt ; Unsaturated polymers ; Wave propagation ; Axis translation technique ; Dynamic loading conditions ; Experimental laboratory ; Piezoelectric benders ; Shear-wave velocity measurement ; Small-strain shear modulus ; Unsaturated sandy soils ; Shear flow
  8. Source: 4th International Conference on Transportation Geotechnics, ICTG 2021, 23 May 2021 through 26 May 2021 ; Volume 165 , 2022 , Pages 837-849 ; 23662557 (ISSN); 9783030772338 (ISBN)
  9. URL: https://link.springer.com/chapter/10.1007/978-3-030-77234-5_69