Geotechnical Characteristics of Volcanic Beach Sands with Varying Iron Contents

Hyunwook Choo, Jaewook Hwang, Youngmin Choi, Changho Lee, Woojin Lee

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2 Citations (Scopus)

Abstract

One of the distinguishing features of volcanic beach sand compared to typical silica sand can be found in its relatively high iron content; however, studies on the effect of iron content on the engineering properties of volcanic beach sand have been very limited until now. Consequently, this experimental investigation quantifies the effect of iron content on the engineering properties of Ulleung volcanic beach sands, including small strain stiffness, compressibility, friction angle, and cone tip resistance. Various geotechnical experiments were performed, and test results demonstrate that the small strain stiffness increases with an increase in iron content because of the increased interparticle contact stiffness. In addition, the elastic deformation of soil particles decreases with an increase in iron content because of the greater elastic modulus of iron compared to that of silica. In contrast, the effects of iron content on the intermediate strain constrained modulus and on the large strain friction angle are insignificant, and these properties are mainly determined by state variables. The relationship between the stress-normalized cone tip resistance and the state parameter of tested Ulleung sand is very similar to that on silica sands, reflecting that the effect of iron contents on the cone tip resistance is minimal.

Original languageEnglish
JournalMarine Georesources and Geotechnology
DOIs
Publication statusAccepted/In press - 2015 Oct 6

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Keywords

  • cone tip resistance
  • constrained modulus
  • iron content
  • peak friction angle
  • small strain stiffness
  • volcanic beach sand

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Oceanography
  • Ocean Engineering

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