Mechanical properties of sand, silt, and clay containing tetrahydrofuran hydrate

Tae Sup Yun, Carlos J. Santamarina, C. Ruppel

Research output: Contribution to journalArticle

225 Citations (Scopus)

Abstract

The mechanical behavior of hydrate-bearing sediments subjected to large strains has relevance for the stability of the seafloor and submarine slopes, drilling and coring operations, and the analysis of certain small-strain properties of these sediments (for example, seismic velocities). This study reports on the results of comprehensive axial compression triaxial tests conducted at up to 1 MPa confining pressure on sand, crushed silt, precipitated silt, and clay specimens with closely controlled concentrations of synthetic hydrate. The results show that the stress-strain behavior of hydrate-bearing sediments is a complex function of particle size, confining pressure, and hydrate concentration. The mechanical properties of hydrate-bearing sediments at low hydrate concentration (probably <40% of pore space) appear to be determined by stress-dependent soil stiffness and strength. At high hydrate concentrations (>50% of pore space), the behavior becomes more independent of stress because the hydrates control both stiffness and strength and possibly the dilative tendency of sediments by effectively increasing interparticle coordination, cementing particles together, and filling the pore space. The cementation contribution to the shear strength of hydrate-bearing sediments decreases with increasing specific surface of soil minerals. The lower the effective confining stress, the greater the impact of hydrate formation on normalized strength.

Original languageEnglish
Article numberB04106
JournalJournal of Geophysical Research: Solid Earth
Volume112
Issue number4
DOIs
Publication statusPublished - 2007 Apr 4

Fingerprint

Silt
tetrahydrofuran
Hydrates
hydrates
sands
clays
mechanical property
silt
Sand
mechanical properties
Bearings (structural)
clay
Mechanical properties
sand
Sediments
sediments
sediment
pore space
confining pressure
confining

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

Cite this

@article{3b3a994b8b35441d9ceeb195b4956442,
title = "Mechanical properties of sand, silt, and clay containing tetrahydrofuran hydrate",
abstract = "The mechanical behavior of hydrate-bearing sediments subjected to large strains has relevance for the stability of the seafloor and submarine slopes, drilling and coring operations, and the analysis of certain small-strain properties of these sediments (for example, seismic velocities). This study reports on the results of comprehensive axial compression triaxial tests conducted at up to 1 MPa confining pressure on sand, crushed silt, precipitated silt, and clay specimens with closely controlled concentrations of synthetic hydrate. The results show that the stress-strain behavior of hydrate-bearing sediments is a complex function of particle size, confining pressure, and hydrate concentration. The mechanical properties of hydrate-bearing sediments at low hydrate concentration (probably <40{\%} of pore space) appear to be determined by stress-dependent soil stiffness and strength. At high hydrate concentrations (>50{\%} of pore space), the behavior becomes more independent of stress because the hydrates control both stiffness and strength and possibly the dilative tendency of sediments by effectively increasing interparticle coordination, cementing particles together, and filling the pore space. The cementation contribution to the shear strength of hydrate-bearing sediments decreases with increasing specific surface of soil minerals. The lower the effective confining stress, the greater the impact of hydrate formation on normalized strength.",
author = "Yun, {Tae Sup} and Santamarina, {Carlos J.} and C. Ruppel",
year = "2007",
month = "4",
day = "4",
doi = "10.1029/2006JB004484",
language = "English",
volume = "112",
journal = "Journal of Geophysical Research",
issn = "0148-0227",
publisher = "American Geophysical Union",
number = "4",

}

Mechanical properties of sand, silt, and clay containing tetrahydrofuran hydrate. / Yun, Tae Sup; Santamarina, Carlos J.; Ruppel, C.

In: Journal of Geophysical Research: Solid Earth, Vol. 112, No. 4, B04106, 04.04.2007.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Mechanical properties of sand, silt, and clay containing tetrahydrofuran hydrate

AU - Yun, Tae Sup

AU - Santamarina, Carlos J.

AU - Ruppel, C.

PY - 2007/4/4

Y1 - 2007/4/4

N2 - The mechanical behavior of hydrate-bearing sediments subjected to large strains has relevance for the stability of the seafloor and submarine slopes, drilling and coring operations, and the analysis of certain small-strain properties of these sediments (for example, seismic velocities). This study reports on the results of comprehensive axial compression triaxial tests conducted at up to 1 MPa confining pressure on sand, crushed silt, precipitated silt, and clay specimens with closely controlled concentrations of synthetic hydrate. The results show that the stress-strain behavior of hydrate-bearing sediments is a complex function of particle size, confining pressure, and hydrate concentration. The mechanical properties of hydrate-bearing sediments at low hydrate concentration (probably <40% of pore space) appear to be determined by stress-dependent soil stiffness and strength. At high hydrate concentrations (>50% of pore space), the behavior becomes more independent of stress because the hydrates control both stiffness and strength and possibly the dilative tendency of sediments by effectively increasing interparticle coordination, cementing particles together, and filling the pore space. The cementation contribution to the shear strength of hydrate-bearing sediments decreases with increasing specific surface of soil minerals. The lower the effective confining stress, the greater the impact of hydrate formation on normalized strength.

AB - The mechanical behavior of hydrate-bearing sediments subjected to large strains has relevance for the stability of the seafloor and submarine slopes, drilling and coring operations, and the analysis of certain small-strain properties of these sediments (for example, seismic velocities). This study reports on the results of comprehensive axial compression triaxial tests conducted at up to 1 MPa confining pressure on sand, crushed silt, precipitated silt, and clay specimens with closely controlled concentrations of synthetic hydrate. The results show that the stress-strain behavior of hydrate-bearing sediments is a complex function of particle size, confining pressure, and hydrate concentration. The mechanical properties of hydrate-bearing sediments at low hydrate concentration (probably <40% of pore space) appear to be determined by stress-dependent soil stiffness and strength. At high hydrate concentrations (>50% of pore space), the behavior becomes more independent of stress because the hydrates control both stiffness and strength and possibly the dilative tendency of sediments by effectively increasing interparticle coordination, cementing particles together, and filling the pore space. The cementation contribution to the shear strength of hydrate-bearing sediments decreases with increasing specific surface of soil minerals. The lower the effective confining stress, the greater the impact of hydrate formation on normalized strength.

UR - http://www.scopus.com/inward/record.url?scp=34250633494&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34250633494&partnerID=8YFLogxK

U2 - 10.1029/2006JB004484

DO - 10.1029/2006JB004484

M3 - Article

AN - SCOPUS:34250633494

VL - 112

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

SN - 0148-0227

IS - 4

M1 - B04106

ER -