A Transparent Sand for Geotechnical Laboratory Modeling

Ezzein, Fawzy M.; Bathurst, Richard J.

doi:10.1520/gtj103808

Cited by 126 publications

(16 citation statements)

References 26 publications

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“…Recent work uses transparent soils to determine in detail the particle-structure interactions during impact penetration in cohesion-less soil [139] and cohssive soil [140]. Omidvar et al [141] conducted penetration tests using "refractive index-matched granular media" with macroscopic physical and mechanical properties replicating the behavior of natural soils to visualize, non-intrusively, in-situ granular kinematics under impact penetration in granular media.…”

Section: Natural Soil/synthetic Soil Models and Prototypesmentioning

confidence: 99%

Advances in Projectile Penetration Mechanism in Soil Media

et al. 2020

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The penetration to geological shield occurs in many situations at various velocities and scales, for example, meteor-cratering, pile driving, falling of objects from high-rise building construction, and debris/fragments from failed components. The soil media is an efficient energy dissipation system and effective shock protection shield. Impact circumstances are currently getting widespread attention. A lot of research has been done on soil media for impact and penetration. The phenomenon of dynamic penetration in heterogeneous particulate soil medium is very complex and the target soil media under dynamic impact especially under high speed and deep penetration neither behave completely as solid nor as liquid. The topics of recent research interest in the field of penetration to soil media and their significant findings are critically reviewed in the present study. The dedicated review of analytical, empirical, experimental, and computational methods to predict the response of soils media-impacting objects to penetration is presented. The emerging challenges in fundamental research of penetration into soil media are outlined and it is an attempt to formulate the future research directions in the field of soil media penetration.

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Section: Natural Soil/synthetic Soil Models and Prototypesmentioning

confidence: 99%

Advances in Projectile Penetration Mechanism in Soil Media

et al. 2020

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“…Through consulting the relevant literatures (Kong et al, 2016;Li and Lin, 2015;Iskander, 2010;Iskander et al, 2002a;2002b;Ezzein and Bathurst, 2011;Sui et al, 2011;Zhang et al, 2014), the currently common used aggregate are: Amorphous silica powder and silica gel, the pore fluid: Mineral oil and calcium bromide solution. The different combinations of aggregate and pore fluid are following four types: (i) Amorphous silica powder and Mineral oil; (ii) Silica gel and Mineral oil; (iii) Amorphous silica powder and Calcium bromide solution; (iv) Silica gel and Calcium bromide solution.…”

Section: Common Used Raw Materials Combinationmentioning

confidence: 99%

“…However, with a comprehensive analysis of the existing research results (Iskander et al, 1993;Ezzein and Bathurst, 2011;2014), the transparency of the transparent materials used in the test has become a key factor that restricts the results of the model test and it decided the results quality of the model test to a great extent. So it is very necessary to develop the study on the influence factors of transparency.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Raw Materials for Preparation of Transparent Soil Based on Analytic Hierarchy Process

Liu¹,

Wang²,

Song³

et al. 2017

American Journal of Engineering and Applied Sciences

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Abstract:The application of man-made transparent soil has greatly contributed to the development of the visual research in physical model test. Comparing to the traditional model test, the transparent soil has advantages with respect to transparency, visualization, lower cost and utility et al. However, the transparency of material itself seriously restricted the effect of the results during the model text. This paper took the transparency as the evaluation standard, based on the Analytic Hierarchy Process (AHP) to make clear the factors on transparency of transparent soil which are: Purity and transparency of materials, matching degree of refractive index, size distribution of aggregate, air content and loadingunloading rate while consolidation and taking the commonly used combinations of raw materials as the example, the optimal combination was obtained. The work described in this study can provide a certain theoretical guidance for selection of raw materials and to improve the transparency during the preparation of transparent soil.

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“…Infiltration experiments were performed using transparent soil that provides high-resolution locational and temporal measurements of degree of saturation (Peters et al 2011;Siemens et al 2013). Transparent soil is formed by matching the refractive indices of the soil particles and the pore fluid, which are fused quartz and a mineral oil mixture, respectively (Ezzein and Bathurst 2011;Peters et al 2011). Figures 2 and 3 illustrate the change in colour of the unsaturated transparent soil with changes in the degree of saturation (S r ).…”

Section: Laboratory Experimentsmentioning

confidence: 99%

Physical and numerical modeling of infiltration including consideration of the pore-air phase

2014

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Infiltration is a vadose zone process of interest to a wide range of research communities including agriculture, soil physics, and geotechnical engineering. In geotechnical engineering, transient infiltration is important to moisture balance problems such as cover systems, capillary breaks, and landslide triggering. Design of cover systems, capillary breaks, and landslide analysis applications depend on accurate models for the transient pore pressure and moisture migration response under a wide range of environmental conditions. Infiltration is typically modeled using Richards’ equation, which assumes no impedance from the pore-air phase. However, if this assumption is invalid, the ground response during infiltration is significantly affected. An optically matched pore fluid – transparent soil, which allows for high temporal and resolution measurements of degree of saturation, was used to examine the effect of air entrapment on infiltration. Homogeneous and layered profiles were subjected to closed and open infiltration conditions. Following the completion of the experimental program, the results were simulated using a finite element program that allows for consideration of the air phase during infiltration. The results show the impact of ignoring the effect of air entrapment is to significantly underpredict the time to saturation and overpredict the pore pressure response.

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A Transparent Sand for Geotechnical Laboratory Modeling

Cited by 126 publications

References 26 publications

Advances in Projectile Penetration Mechanism in Soil Media

Advances in Projectile Penetration Mechanism in Soil Media

Optimization of Raw Materials for Preparation of Transparent Soil Based on Analytic Hierarchy Process

Physical and numerical modeling of infiltration including consideration of the pore-air phase

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