Elastic Stiffness of Volcanic Sand through Resonant Column Tests

Abstract:

The resonant column method is established as a standard laboratory method for the study of the elastic properties of soils. The study presents low-amplitude resonant column test results on volcanic sands with intra-particle voids. The experiments were performed on dry samples prepared at variable relative densities and tested in torsional mode of vibration. In the first part of the article, the important factors that control the elastic stiffness of uncemented sands are described shortly and recent findings on granular soils dynamic properties are presented briefly. The second part describes the basic features of the resonant column used in the investigation and the materials of the study and in the third part representative results of an extensive experimental testing program on volcanic granular soils are presented and discussed with a focus on comparisons between the elastic stiffness of volcanic and quartz granular soils. The importance of the effect of the presence of intra-particle voids within the particle mass of the volcanic soils is emphasized, which in turn affects markedly the global void ratio of the samples.

• Periodical: Applied Mechanics and Materials (Volume 775)
• Pages: 292-297
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.775.292
• Online since: July 2015
• Authors: Kostas Senetakis*, Anastasios Anastasiadis
• Keywords: Elastic Stiffness, Resonant Column, Shear Modulus, Volcanic Sand, Wave Propagation

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