Micromechanical model for compaction characteristics of bentonite-sand mixtures

Y. M. Tien*, P. L. Wu, W. S. Chuang, L. H. Wu

*Corresponding author for this work

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

This paper presents a new methodology for predicting the relationship between compaction stress and dry density, referred to herein as the compaction curve, of composite mixtures based on the micromechanics. To examine the effect of sand content on the compaction characteristics, a series of uniaxial compaction tests (UCT) for bentonite-sand mixtures with different sand fractions (by weight) were performed. In addition, a prediction model based on micromechanics for composite mixtures was developed. The developed model can be used to predict the compaction curves of composite mixtures based on experimental compaction curve of the matrix. The accuracy of the proposed model along with its applicability was examined and validated by using experimental data. The results show that the proposed model can accurately predict the compaction curves of the bentonite-sand mixtures in both loading and unloading phases.

Original languageEnglish
Pages (from-to)489-498
Number of pages10
JournalApplied Clay Science
Volume26
Issue number1-4 SPEC. ISS.
DOIs
StatePublished - Aug 2004

Keywords

  • Bentonite-sand mixture
  • Composite soil
  • Differential scheme
  • Micromechanic
  • Uniaxial compaction

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