An Interpretation of Mechanical Properties of Bentonite as a Non-linear Elastic Material

Authors

  • Y. Takayama
  • S. Tsurumi
  • A. Iizuka
  • K. Kawai
  • S. Ohno

Keywords:

Bentonite, Elastic Material, Constitutive Modeling, Swelling Characteristic

Abstract

Bentonite is usually modeled as a geo-material with elasto-plastic isotropic compression/expansion and plastic dilatancy characteristics. In this paper, fundamental considerations of elasto-plastic constitutive modeling for fully saturated bentonite are investigated. According to uniaxial compression test data by Sasakura et al. (2003), where lateral earth pressure was measured, it was found that the hysteresis response between loading and unloading processes does not appear. It suggested that bentonite is an elastic material in which the swelling line corresponds to the normally consolidated line in the ‘e-logp’ relationship. Also, according to triaxial CU test results of bentonite, it was seen the effective mean stress remains almost unchanged during shearing. This implies
that bentonite does not have dilatancy characteristics as defined by the critical state theory. Similar interpretation can be derived from the experimental results obtained from a series of triaxial CD tests by Cui et al. (2006).

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Published

2012-12-31

How to Cite

Y. Takayama, S. Tsurumi, A. Iizuka, K. Kawai, & S. Ohno. (2012). An Interpretation of Mechanical Properties of Bentonite as a Non-linear Elastic Material . GEOMATE Journal, 3(6), 357–362. Retrieved from https://geomatejournal.com/geomate/article/view/1641