Estimating porosity and particle size for hydraulic conductivity of binary mixed soils containing two different-sized silica particles

H. Choo, Woojin Lee, C. Lee, S. E. Burns

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

This study investigates the hydraulic conductivity (K) of binary mixed soils containing two different-sized silica particles, with the ultimate goal of developing the porosity (n) and equivalent particle size (deq) estimating formulas for binary mixed soils. Theoretical backgrounds for K of mixed soils were reviewed. In addition, a series of constant head permeameter tests for mixtures with three different size ratios between small and large particles were performed. It is demonstrated that the K of tested materials decreases with an increase in volume fraction of small particles (SCV) when SCV < SC*V (volumetric critical small particle content) because of the decreases in both n and deq. In contrast, when SCV > SC*V, K shows less change with SCV because of the offset mechanism between increased n and decreased deq. Additionally, n and deq estimating methods for mixed soils are suggested in this study and compared with the experimental results.

Original languageEnglish
Article number04017104
JournalJournal of Geotechnical and Geoenvironmental Engineering
Volume144
Issue number1
DOIs
Publication statusPublished - 2018 Jan 1

Fingerprint

Hydraulic conductivity
hydraulic conductivity
silica
Porosity
Particle size
porosity
Silica
particle size
Soils
soil
permeameter
Volume fraction
particle

Keywords

  • Constant head test
  • Hydraulic conductivity
  • Mixed soils
  • Particle size
  • Porosity

ASJC Scopus subject areas

  • Environmental Science(all)
  • Geotechnical Engineering and Engineering Geology

Cite this

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abstract = "This study investigates the hydraulic conductivity (K) of binary mixed soils containing two different-sized silica particles, with the ultimate goal of developing the porosity (n) and equivalent particle size (deq) estimating formulas for binary mixed soils. Theoretical backgrounds for K of mixed soils were reviewed. In addition, a series of constant head permeameter tests for mixtures with three different size ratios between small and large particles were performed. It is demonstrated that the K of tested materials decreases with an increase in volume fraction of small particles (SCV) when SCV < SC*V (volumetric critical small particle content) because of the decreases in both n and deq. In contrast, when SCV > SC*V, K shows less change with SCV because of the offset mechanism between increased n and decreased deq. Additionally, n and deq estimating methods for mixed soils are suggested in this study and compared with the experimental results.",
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