Combined effect of fines content and uniformity coefficient on cyclic liquefaction resistance of silty sands

This paper presents an experimental study that investigates the influence of the non-plastic fines on the initiation of instability of sands under cyclic loading. The materials used for this study and the experimental device are first presented, then the results of typical liquefaction tests for both loose and medium dense specimens are presented with emphasis on the exhibited behaviour. The results of a series of cyclic undrained tests that were done with the aid of a triaxial apparatus for different percentages of fines are also presented and analysed. The results reveal that the increase in the non-plastic fines content lead to an increase in the liquefaction resistance of sands.

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Effects of fines content and plasticity on liquefaction resistance of sands

Proceedings of the Institution of Civil Engineers - Geotechnical Engineering ◽

10.1680/jgeen.19.00270 ◽

2020 ◽

pp. 1-37

Author(s):

K. Ranga Swamy ◽

M. Akhila ◽

N. Sankar

Keyword(s):

Liquefaction Resistance ◽

Fines Content

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A Reconciliation of the Effects of Non-Plastic Fines on the Liquefaction Resistance of Sands Reported in the Literature

Earthquake Spectra ◽

10.1193/1.1597878 ◽

2003 ◽

Vol 19 (3) ◽

pp. 635-651 ◽

Cited By ~ 30

Author(s):

Carmine P. Polito ◽

James R. Martin

Keyword(s):

Relative Density ◽

Void Ratio ◽

Liquefaction Resistance ◽

Fines Content ◽

Silt Content ◽

Cyclic Resistance ◽

Initial Decrease

The literature presents several seemingly contradictory reports concerning the effects of non-plastic (i.e., silty) fines content on the liquefaction resistance of sands. These seemingly contradictory trends were reconciled in light of the results of a recent study by the authors that linked cyclic resistance and relative density. It was shown that the trend of decreasing cyclic resistance with increasing silt content reported in the literature could be explained by considering the soil's relative density. The same argument was made for the trend of decreasing and then increasing cyclic resistance with increasing silt content. The concept that cyclic resistance is controlled by the sand skeleton void ratio of the soil was also reconciled with the results of the authors’ previous study. The trend of increasing cyclic resistance (without a corresponding initial decrease) with increasing silt content that has been reported in the literature does not appear to occur in non-plastic silts.

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Effects of fines content on liquefaction strength and dynamic settlement of reclaimed soil

Canadian Geotechnical Journal ◽

10.1139/t01-083 ◽

2002 ◽

Vol 39 (1) ◽

pp. 254-265 ◽

Cited By ~ 48

Author(s):

Lien-Kwei Chien ◽

Yan-Nam Oh ◽

Chih-Hsin Chang

Keyword(s):

Relative Density ◽

Land Reclamation ◽

Volumetric Strain ◽

Soil Liquefaction ◽

Dry Density ◽

Test Results ◽

Liquefaction Resistance ◽

Fines Content ◽

Reclaimed Soil ◽

Dynamic Settlement

In this study, the reclaimed soils in the Yunlin area of west Taiwan are adopted as test samples. The specimens were prepared by moist tamping at different relative densities and fines contents. Triaxial liquefaction tests were performed to evaluate the liquefaction strength and liquefaction-induced settlement. The test results show that the liquefaction strength of reclaimed soil increases as the relative density increases. In addition, under constant relative density, the liquefaction strength decreases as the fines content increases. Based on the test results and one-dimensional consolidation theory, the volumetric strain and settlement can be evaluated by dry density and fines content of the reclaimed soil. The results show that the settlement ratio decreases as the relative density increases. The figures and results can be references for the evaluation of liquefaction strength and liquefaction-induced settlement. The results are useful for liquefaction strength and settlement analysis for planning, design, and related research on land reclamation engineering.Key words: reclaimed soil, liquefaction resistance, fines content, settlement.

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LIQUEFACTION RESISTANCE OF SAND MATRIX SOILS

Jurnal Teknologi ◽

10.11113/jt.v77.6423 ◽

2015 ◽

Vol 77 (11) ◽

Author(s):

Choy Soon Tan ◽

Aminaton Marto ◽

Ahmad Mahir Makhtar ◽

Siaw Yah Chong ◽

Faizal Pakir

Keyword(s):

Triaxial Testing ◽

Testing System ◽

Cyclic Tests ◽

Liquefaction Resistance ◽

Fines Content ◽

Dominant Soil

Numerous researches have been focusing on the roles of fines in liquefaction resistance of sand matrix soils (sand dominant soil that contains little presenting fines). It has been reported that the presence of plastic fines would either imposed additional liquefaction resistance of sand matrix soils or caused reduction to the liquefaction resistance. This paper aims to present the liquefaction resistance of sand matrix soils with respect to different fines content based on the results from cyclic tests using triaxial testing system. The sand matrix soils were reconstituted by mixing the plastic fines (kaolin and bentonite) to the clean sand at seven different percentages by weight. Results showed that liquefaction resistance of sand matrix soils decreases with an increase of fines content until a minimal value and increases thereafter. It was identified that the presence of fine contents to give the minimum liquefaction resistance were 20 % for sand-bentonite mixtures and 25 % for sand-kaolin mixtures. These values represent the threshold fines content for respective mixtures.

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Effect of Soil-Type and Fines Content on Liquefaction Resistance—Shear-Wave Velocity Correlation

Journal of Earthquake Engineering ◽

10.1080/13632469.2018.1475312 ◽

2018 ◽

Vol 24 (8) ◽

pp. 1311-1335 ◽

Cited By ~ 1

Author(s):

Nurhan Ecemis

Keyword(s):

Shear Wave ◽

Wave Velocity ◽

Shear Wave Velocity ◽

Soil Type ◽

Velocity Correlation ◽

Liquefaction Resistance ◽

Fines Content

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Experimental Study on Silt Liquefaction Characteristics of Different Fines Content

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.353-356.2323 ◽

2013 ◽

Vol 353-356 ◽

pp. 2323-2326

Author(s):

Qiang Luo ◽

Chun Yan Wang ◽

Xue Wei Li

Keyword(s):

Experimental Study ◽

Pore Water ◽

Exponential Function ◽

Pore Water Pressure ◽

Water Pressure ◽

Model Parameters ◽

Function Model ◽

Liquefaction Resistance ◽

Fines Content ◽

Triaxial Apparatus

Used the dynamic triaxial apparatus to test 4 group remodeling silt samples of different fines content. Studies the variation relationship on liquefaction resistance of silt with different fines content.And pore water pressure increase of silt with different fines content is analyzed through Exponential function model,the model parameters can be get. The numerical results show that the model has good applicability.

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Experimental Research on Effect of Fines Content on Liquefaction Properties of Sand

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.f1092.0886s19 ◽

2019 ◽

Vol 8 (6S) ◽

pp. 432-436

Keyword(s):

Pore Water ◽

Pore Water Pressure ◽

Water Pressure ◽

Sandy Soils ◽

Triaxial Tests ◽

Liquefaction Resistance ◽

Cyclic Triaxial Tests ◽

Fines Content ◽

Fine Grained ◽

Cyclic Resistance

Liquefaction is a phenomenon mainly occurred in saturated fine grained soils under major earthquakes causes tremendous loss to infrastructure. From the literature it has been observed that liquefaction not only occurs in fine sands but also occurs in sands containing some amount of fines particles, which are of less than 75µ in size. Unfortunately there is no clear conclusions given as how effect the fines content on liquefaction resistance of sandy soils. In order to solve above mentioned problem this study was undertaken through stress-controlled cyclic triaxial tests to know the effect of fines content on liquefaction resistance of sandy soils. In this study the program of experimentation was done on base sand and sand mixed with four different combinations of fines like 10%, 20%, 30%, and 40% of fines with base sand by weight.. The main parameters changed in this work were percentage fines and shear stress ratio (CSR ), where the observed parameter was amount of pore water pressure and cycle of loading.. The result showed that, rate of pore water pressure generation during cyclic loading was largely affected by limiting silt content and density index. The trend observed as amount of pore water pressure is increased more than base sand with adding of fines content up to 20%, later the trend observed as reverse. And also noticed that more CSR value increases the pore water pressure generation and decreases the cyclic resistance

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