Permeability Prediction of Soils Including Degree of Compaction and Microstructure

Razakamanantsoa, Andry; Amiri, Ouali

doi:10.1061/(asce)gm.1943-5622.0000792

Cited by 33 publications

(15 citation statements)

References 19 publications

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“…e evolution of the permeability is becoming less significant with the low degree of compaction. e permeability channel will be blocked when the degree of compaction intensified [22]. e bottom tailings are continuously 4 Complexity compressed when the height of the tailings dam increases.…”

Section: 3mentioning

confidence: 99%

“…Most calculated permeability is larger than the measured permeability. e high permeability values calculated by the Kozeny approach Complexity can be explained by an imprecise estimation of specific surface area, as well as by the possibility that the model is not valid for some types of soil [22]. In addition, the structure and compaction are not considered in equation (4).…”

Section: Comparison Between Experimental Permeability Coefficients Anmentioning

confidence: 99%

“…d 10 is used to calculate the average pore diameter of silt [21]. e permeability of the second iron tailings (2-4) could be calculated by equation (22), and more accurate results were obtained and are shown in Table 1:…”

Section: Permeability Coefficient Calculation Of the Disturbed Tailinmentioning

confidence: 99%

“…As the pressure increases, the porosity decreases. In addition, the blockage also occurs when the pressure is larger e greater the pressure is, the more frequently the blockage occurs [22,[32][33][34]. P is pressure (kPa).…”

Section: Consideration Of Compaction Characteristics In Prediction Ofmentioning

confidence: 99%

“…It is necessary to rectify the permeability calculation equations, and the calculated permeability drawing from the revised equations becomes more accurate (equations (27)- (29)). In fact, the granulometric characteristics necessarily play a vital role in the evolution of the pore interconnections by blocking the water-flow paths and by modifying the morphological parameters [7,22,38,39]. More factors about compression tailings need to be considered.…”

Section: Consideration Of Compaction Characteristics In Prediction Ofmentioning

confidence: 99%

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Permeability Prediction of Iron Tailings Including Degree of Compaction and Structure

2019

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The stability of iron tailings dam is affected by the permeability of tailings. Considering the influence of it, it is necessary to analyze the permeability of tailings so as to prevent the recurrence of Brazilian iron tailings dam accidents. Nevertheless, the results of iron tailings permeability from some prediction equations (Terzaghi equation, Hazen equation, and Kozeny equation) cannot be accurate. Iron tailings are various as they can be divided into three categories: (1) silt content is less than 40%; (2) silt content is more than 40%, while clay content is less than 15%; and (3) clay content is more than 15% and less than 30%. Correspondingly, three equations are proposed to calculate the disturbed and iron undisturbed tailings permeability for the three types. And more accurate results come from it. The water-flow paths of the iron tailings are blocked after compaction, and the critical pressure of iron tailings blockage is 200 kPa. Although the porosity is large, some of the pores are isolated from each other when the pressure is larger than 200 kPa. However, porosity becomes too large for permeability calculation after compaction and the calculated permeability gets larger as well (equations (24)–(26)). Correcting the permeability calculation equations is an absolute must. The calculated permeability by the revised equations becomes more accurate (equations (27)–(29)). In fact, the granulometric characteristics necessarily play a vital role in the evolution of the pore interconnections by blocking the water-flow paths and modifying the morphological parameters. More research studies are required to be done in the future.

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Section: 3mentioning

confidence: 99%

Section: Comparison Between Experimental Permeability Coefficients Anmentioning

confidence: 99%

Section: Permeability Coefficient Calculation Of the Disturbed Tailinmentioning

confidence: 99%

Section: Consideration Of Compaction Characteristics In Prediction Ofmentioning

confidence: 99%

Section: Consideration Of Compaction Characteristics In Prediction Ofmentioning

confidence: 99%

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Permeability Prediction of Iron Tailings Including Degree of Compaction and Structure

2019

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A theoretical study on the hydraulic conductivity of anisotropic granular materials by implementing the microstructure tensor

2023

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A microstructural investigation on hydraulic conductivity of soft clay

Wang

Sun

Huang

et al. 2021

Bull Eng Geol Environ

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Permeability Prediction of Soils Including Degree of Compaction and Microstructure

Cited by 33 publications

References 19 publications

Permeability Prediction of Iron Tailings Including Degree of Compaction and Structure

Permeability Prediction of Iron Tailings Including Degree of Compaction and Structure

A theoretical study on the hydraulic conductivity of anisotropic granular materials by implementing the microstructure tensor

A microstructural investigation on hydraulic conductivity of soft clay

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