Effects of Ageing on the Shear Modulus Degradation Curve of Loose Fraser River Sand

Omunguye, I. W.; Howie, John A.; Styler, Mark A.

doi:10.1061/9780784481486.024

Cited by 4 publications

(1 citation statement)

References 16 publications

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“…Field evidence and laboratory studies have demonstrated that soil engineering properties change over time [1]. Aging phenomena can be described as time-dependent changes in the behavior of soils [2], which can be significant across periods of days to months, and can be presented as increases in small-strain stiffness, cone penetration resistance, liquefaction resistance (related to cyclic stress ratio-CSR), shear strength, shear wave velocity, and small-strain shear modulus in granular materials, such as sands [2][3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Electrokinetic Forces as an Electrical Measure of Chemical Aging Potential in Granular Materials

Castilla-Barbosa,

Rincón-Arango,

Ocampo-Terreros

2023

ChemEngineering

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The zeta potential of soils is an electric potential in the double-layer interface and is a physical property exhibited by any particle related to electrochemical attractive forces. On the other hand, the chemical aging phenomenon is seen as the chief mechanism of the aging of sands due to the dissolution and precipitation of minerals, resulting in the development of the cementation of particles in granular mediums. The present investigation focuses on determining whether granular materials can generate cementation due to electrokinetic forces, and if the zeta potential could be related as a measure of the potential of chemical aging. X-ray fluorescence and diffraction tests were performed to characterize four representative fractions of one kind of sand, and zeta potential studies were carried out to determine the electrical potential on the mineral surfaces of each one. Zeta potential analysis showed both dependence on the mineralogical content and the variation in the pH of the colloidal solution fluid because the increase in OH- ion concentrations increases the thickness of the diffuse double layer and the electrokinetic forces of attraction. Moreover, the zeta potential showed an increase in the thickness of the diffuse double layer, due to the electrokinetic forces, which can be associated with the development of cohesive forces with a dependence on the mineralogy of sands.

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Section: Introductionmentioning

confidence: 99%

Electrokinetic Forces as an Electrical Measure of Chemical Aging Potential in Granular Materials

Castilla-Barbosa,

Rincón-Arango,

Ocampo-Terreros

2023

ChemEngineering

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Impact of natural environment on sand aging under static and dynamic conditions

et al. 2022

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A Review of Sand Aging: Mechanisms and Impacts

Castilla-Barbosa,

Ocampo-Terreros,

Rincón-Arango

2024

Geotech Geol Eng

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Sand aging, defined by time-dependent increases in stiffness and strength over periods ranging from days to months, poses significant challenges in geotechnical engineering and soil science. Despite its relevant implications, the mechanisms driving sand aging remain understood. This review systematically examines sand aging, emphasizing the classification of chemical and mechanical processes involved. Key advancements in chemical aging understanding, particularly the influence of surface chemistry and electrokinetic forces, are discussed. Additionally, the review underscores the critical role of micromechanical modeling, especially discrete element methods, in elucidating particle interactions and aging phenomena. The review also identifies essential directions for future research, notably incorporating particle shape and surface texture into aging models. Hence, this comprehensive resource aims to enhance the understanding of sand aging.

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Effects of Ageing on the Shear Modulus Degradation Curve of Loose Fraser River Sand

Cited by 4 publications

References 16 publications

Electrokinetic Forces as an Electrical Measure of Chemical Aging Potential in Granular Materials

Electrokinetic Forces as an Electrical Measure of Chemical Aging Potential in Granular Materials

Impact of natural environment on sand aging under static and dynamic conditions

A Review of Sand Aging: Mechanisms and Impacts

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