Shear Strength and Stiffness of Sands Containing Plastic or Nonplastic Fines

Carraro, J. Antônio H.; Prezzi, Mônica; Salgado, Rodrigo

doi:10.1061/(asce)1090-0241(2009)135:9(1167)

Cited by 190 publications

(78 citation statements)

References 42 publications

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“…V s of granular mixtures is effectively represented by the intergranular void ratio, reflecting the stiffness of the granular mixture is determined by the stiffness of contacts between large particles, which acts as the structural skeleton at low fines content (FC < FC * ). 4. V s of the tested mixtures is a function of the intergranular void ratio, and exhibits a trend similar to that of V s of ummixed materials as a function of global void ratio.…”

Section: The Reduction In Stiffness Of Granular Mixtures Accordingsupporting

confidence: 60%

“…Most natural sand deposits are actually a mixture of sand particles and varying quantities of fine-grained soil particles [4,13,17,36,42,48]. Traditionally, studies to investigate the mechanical behaviors of sand deposits have been performed using clean sands, with the impact of fine-grained particles on the behavior of sand deposits being studied more recently.…”

Section: Introductionmentioning

confidence: 99%

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Shear wave velocity of granular mixtures of silica particles as a function of finer fraction, size ratios and void ratios

Choo

Burns

2015

Granular Matter

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This experimental investigation quantified the shear wave velocity (V s ) of granular packs composed of large grains mixed with small quantities of finer grains, up to the critical fines content (FC * ). Bender element tests were performed on 112 mixtures to quantify the variation of V s with fines content (FC), particle size ratio, and void ratio. When FC was less than FC * , the shear wave velocity decreased with increasing FC, due to the reduction in interparticle contacts between large grains. In addition, the observed reduction in packing stiffness was more apparent as the size difference between the two particles increased. Most notably, the results of this study demonstrated that V s of granular mixtures of two different silica particles with FC < FC * was best expressed in terms of intergranular void ratio when finer particles were treated as void space, as opposed to the global void ratio.

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Section: The Reduction In Stiffness Of Granular Mixtures Accordingsupporting

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Shear wave velocity of granular mixtures of silica particles as a function of finer fraction, size ratios and void ratios

Choo

Burns

2015

Granular Matter

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Section: Ll < 35%mentioning

confidence: 99%

“…For instance, when keeping constant void ratio it has been found that liquefaction resistance decreases as ines rise (e.g., [38][39][40][41][42]). If relative density is held constant used for comparison, liquefaction resistance grows with the addition of ines (e.g., [40,[42][43][44]). Some researchers as Kuerbis [43] found the sand skeleton void ratio, which assumes that the volume occupied by ines is part of the volume of voids, to be a more appropriate parameter because it seemed to be independent of ines content; yet, Polito and Martin [45] identiied a growth in liquefaction resistance with ine content for Yatesville sand when maintaining constant sand skeleton void ratio.…”

Section: Ll < 35%mentioning

confidence: 99%

New Insight in Liquefaction After Recent Earthquakes: Chile, New Zealand and Japan

Alberto-Hernandez¹,

Towhata²

2017

Earthquakes - Tectonics, Hazard and Risk Mitigation

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Liquefaction has proved to be one of the major geotechnical issues caused by earthquakes. It is one of the most costly phenomena and has afected several cities around the world. Although the topic has been studied since the 1960s, new questions are emerging. The earthquakes of Chile in 2010, New Zealand in 2010 and 2011, and Japan in 2011 had in common not only being some of the largest earthquakes of this decade but also having a problem of extensive liquefaction. Although most seismic codes have provisions against liquefaction, there are still some misconceptions regarding the characteristics of soil susceptibility and the efect of repeated liquefaction. This chapter introduces a detailed report of the damage caused by liquefaction in the cities afected by those earthquakes and also highlights observations in liqueied areas that were unexpected.Advanced geotechnical testing was conducted and compiled to compare them with previous assessment criteria and observations. A more comprehensive framework for the evaluation of liquefaction susceptibility and countermeasures will be presented and a roadmap of future work in the area will be described.

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“…In shear behaviour, the friction angle can be affected by the gradation of sand such as sands with the lowest friction angle tend to be medium-fine, well-rounded, and poorly graded sands and Sands with the highest friction angle tend to be coarser grained, well-graded, and/or angular sands [3]. The addition of non-plastic silt to the host sand increases both the peak and critical-state friction angles of the soil [4]. It appears that the more angular non-plastic silt particles tend to interact with irregularities on the surface of sand particles, increasing the "jamming" effect during shearing.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Soil Particle Arrangement on Shear Strength Behavior of Silty Sand

Daud

Hui

Juliana

2016

MATEC Web of Conferences

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Abstract. The presence of fines in sandy soil is recognized as a problem in geotechnical engineering. It is often assumed that the strength and liquefaction potential of a soil decreases with increasing fines content. Sand with a significant amount of fines is always encountered in geotechnical engineering projects. The main interest of this paper is to study the effect of particles arrangement and stress behaviour on sand and silty sand sample. The objectives are to determine the basic properties as well as the morphological and mineralogical properties and the relationship of those properties to the stress behaviour of the soils. Sand-silt mixtures with fines contents of 20% and 40% were prepared and a series of testing was carried out to determine their basic properties, morphological and thin section properties, and mechanical properties by using direct shear box equipment. Results show that the basic properties and morphological properties of soil affect the mechanical behaviour of soil. Shape of the soil particle can influence the packing of the soil, hence altering the mechanical behaviour of the soil. From the thin section, the soil is observed to be well graded and have a dense packing while the minerals observed were mainly quartz and rutile.

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Shear Strength and Stiffness of Sands Containing Plastic or Nonplastic Fines

Cited by 190 publications

References 42 publications

Shear wave velocity of granular mixtures of silica particles as a function of finer fraction, size ratios and void ratios

Shear wave velocity of granular mixtures of silica particles as a function of finer fraction, size ratios and void ratios

New Insight in Liquefaction After Recent Earthquakes: Chile, New Zealand and Japan

The Effect of Soil Particle Arrangement on Shear Strength Behavior of Silty Sand

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