Effects of Fines on Monotonic Undrained Shear Strength of Sandy Soils

S. Thevanayagam; K. Ravishankar; S. Mohan

doi:10.1520/gtj10406j

Effects of Fines on Monotonic Undrained Shear Strength of Sandy Soils

S. Thevanayagam
, K. Ravishankar
, S. Mohan

Department of Civil, Structural & Environmental Engineering

University at Buffalo

SUNY Buffalo
Diaz and Yourman Associates

Research output: Contribution to journal › Article › peer-review

45 Scopus citations

Abstract

Shear strength of liquefied sands is an important component in seismic slope stability evaluation. Experimental data on a host sand mixed with different amounts of fines content and a careful analysis of other available steady state strength (S_us) data show that fines content and relative density play important roles affecting S_us, Fines content is found to be the major factor affecting S_us. When the S_us data for sands are grouped into (a) relatively clean sands (<12% fines), (b) silty sands (12 to 32% fines), and (c) silts or sandy silts (>50% fines) at the same relative density, relatively clean sands show the highest S_us. Silts show the lowest S_us. Silty sands show intermediate strengths. Based on this data, lower-bound relationships are proposed for S_us as a function of D_r and fines content.

Original language	English
Pages (from-to)	394-406
Number of pages	13
Journal	Geotechnical Testing Journal
Volume	20
Issue number	4
DOIs	https://doi.org/10.1520/gtj10406j
State	Published - 1997

Keywords

Fines content
Liquefaction
Relative density
Residual strength
Sand
Seismic stability
Silty sand
Steady state strength

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10.1520/gtj10406j

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title = "Effects of Fines on Monotonic Undrained Shear Strength of Sandy Soils",

abstract = "Shear strength of liquefied sands is an important component in seismic slope stability evaluation. Experimental data on a host sand mixed with different amounts of fines content and a careful analysis of other available steady state strength (Sus) data show that fines content and relative density play important roles affecting Sus, Fines content is found to be the major factor affecting Sus. When the Sus data for sands are grouped into (a) relatively clean sands (<12\% fines), (b) silty sands (12 to 32\% fines), and (c) silts or sandy silts (>50\% fines) at the same relative density, relatively clean sands show the highest Sus. Silts show the lowest Sus. Silty sands show intermediate strengths. Based on this data, lower-bound relationships are proposed for Sus as a function of Dr and fines content.",

keywords = "Fines content, Liquefaction, Relative density, Residual strength, Sand, Seismic stability, Silty sand, Steady state strength",

author = "S. Thevanayagam and K. Ravishankar and S. Mohan",

year = "1997",

doi = "10.1520/gtj10406j",

language = "English",

volume = "20",

pages = "394--406",

journal = "Geotechnical Testing Journal",

issn = "0149-6115",

publisher = "ASTM International",

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}

TY - JOUR

T1 - Effects of Fines on Monotonic Undrained Shear Strength of Sandy Soils

AU - Thevanayagam, S.

AU - Ravishankar, K.

AU - Mohan, S.

PY - 1997

Y1 - 1997

N2 - Shear strength of liquefied sands is an important component in seismic slope stability evaluation. Experimental data on a host sand mixed with different amounts of fines content and a careful analysis of other available steady state strength (Sus) data show that fines content and relative density play important roles affecting Sus, Fines content is found to be the major factor affecting Sus. When the Sus data for sands are grouped into (a) relatively clean sands (<12% fines), (b) silty sands (12 to 32% fines), and (c) silts or sandy silts (>50% fines) at the same relative density, relatively clean sands show the highest Sus. Silts show the lowest Sus. Silty sands show intermediate strengths. Based on this data, lower-bound relationships are proposed for Sus as a function of Dr and fines content.

AB - Shear strength of liquefied sands is an important component in seismic slope stability evaluation. Experimental data on a host sand mixed with different amounts of fines content and a careful analysis of other available steady state strength (Sus) data show that fines content and relative density play important roles affecting Sus, Fines content is found to be the major factor affecting Sus. When the Sus data for sands are grouped into (a) relatively clean sands (<12% fines), (b) silty sands (12 to 32% fines), and (c) silts or sandy silts (>50% fines) at the same relative density, relatively clean sands show the highest Sus. Silts show the lowest Sus. Silty sands show intermediate strengths. Based on this data, lower-bound relationships are proposed for Sus as a function of Dr and fines content.

KW - Fines content

KW - Liquefaction

KW - Relative density

KW - Residual strength

KW - Sand

KW - Seismic stability

KW - Silty sand

KW - Steady state strength

UR - https://www.scopus.com/pages/publications/0642365237

U2 - 10.1520/gtj10406j

DO - 10.1520/gtj10406j

M3 - Article

SN - 0149-6115

VL - 20

SP - 394

EP - 406

JO - Geotechnical Testing Journal

JF - Geotechnical Testing Journal

IS - 4

ER -

Effects of Fines on Monotonic Undrained Shear Strength of Sandy Soils

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Keywords

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