Assessment and Modification of Sherard Chemical Method for Evaluation of Dispersion Potential of Soils

Abbasi, Nader; Nazifi, Mohammad H.

doi:10.1007/s10706-012-9573-7

Cited by 35 publications

(10 citation statements)

References 7 publications

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“…Although dispersive soils are thought to exist only in countries with arid or semiarid climates, many countries around the world have encountered problems caused by dispersive soil [2][3][4][5][6][7]. Thirty-seven percent of earthen dams worldwide have collapsed due to piping caused by dispersive erosion [8].…”

Section: Introductionmentioning

confidence: 99%

Effect of Silica Fume as a Waste Material for Sustainable Environment on the Stabilization and Dynamic Behavior of Dispersive Soil

2021

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The use of dispersive soils, which are common in many parts of the world, in engineering applications such as water structures, earthen dams and road embankments is possible with their improvement. Recently, the effects of different chemicals on the stabilization of dispersive soils have been investigated. The use of waste materials in stabilization is preferred both because of the more sustainable environment and the economic advantages it provides. The use of silica fume (SF) as a waste material in different engineering applications provides an important advantage in environmentally and economically sustainable ways. Many studies have been carried out regarding silica fume, especially in the construction industry. Although SF is used in many industries, there is no study about its potential impact on the stabilization and dynamic properties of dispersive soils. In this study, first, Atterberg limits and standard Proctor compaction tests were performed on the mixtures prepared by adding different SF percentages (0, 5, 10, 15, 20, 25 and 30%). Afterward, pinhole tests and resonant column tests were performed to determine dispersibility and dynamic properties on the samples prepared by compaction characteristics for each SF percentage reached. In general, it was determined that SF contributed to a change in soil class, and improvement in dispersibility and dynamic properties of the soil sample, depending on SF content; positive effects of SF were observed in terms of shallow soil improvement.

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Section: Introductionmentioning

confidence: 99%

Effect of Silica Fume as a Waste Material for Sustainable Environment on the Stabilization and Dynamic Behavior of Dispersive Soil

2021

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“…The results showed a clear increase in strength with decreasing activator/ash ratio (up to a maximum of 43.4 MPa), which is a positive result since the activator is the most expensive component in the mixture. Finally, UCS results of the cement and AA samples, at 28 days curing, were very similar [2]. Tempest and Pando (2013) showed that the addition of SSA as a soil stabilizing material, can improve the bearing capacity and stiffness of the soil in comparison with the untreated soil [16].…”

Section: Introductionmentioning

confidence: 74%

“…Some of the major behavioral and strength problems associated with these types of soils are low strength, excessive settlements, expansive, collapsible, liquefiable, soluble, dispersive, silty fine sands, highly organic weak soils, high plasticity, swelling, dispersivity, erodibility, high compressibility and sensitivity to environmental conditions. Generally, problematic soils such as soft clay soils were improved in order to improve their behavioral and strength properties [1,2]. The methods of stabilization can be divided into ground improvement techniques, chemical, mechanical and biological techniques or a combination of them [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Softening of Clayey Soil Stabilized with Sewage Sludge Ash and Lime

2018

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Production of sewage sludge have raised increasing concerns due to negative environmental effect. Sewage Sludge Ash (SSA) is used as a new type of additive for clay. Laboratory tests were performed on clay samples to study the mechanism of sewage sludge ash (SSA) and Hydrated Lime (HL) soil stabilization. Different SSA contents (0, 5, 10, 15%) and hydrated lime (0, 1, 3 and 5%) were added to the soil samples. 288 samples were prepared, and unconfined compressive strength tests were carried out. The samples were tested under optimum water content and also saturated conditions with three replications. The results of the coefficient of softening indicated that by adding SSA and hydrated lime to clay soil simultaneously, the stabilized clay soils can be applied in the moist and saturated condition. According to the results, the samples of SSA contents 0% with hydrated lime 5% and SSA contents 10% with hydrated lime 5% can be placed in the vicinity of moisture.

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“…A relatively adequate amount of research has been conducted on the identification and modification of dispersive soil, both in China and abroad. However, few studies have been conducted on landslide failures of dispersive soil slopes [4,[6][7][8][9][10][11][12][13][14][15]. Sun [16] and Tong [17] studied the mechanisms and causes of landslides on the dispersive soil slopes of the trunk canal channel in the Heilongjiang Nen River diversion project.…”

Section: Introductionmentioning

confidence: 99%

Landslide Failure Mechanisms of Dispersive Soil Slopes in Seasonally Frozen Regions

Wang

Yuan

Wang

2020

Advances in Civil Engineering

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Hydraulic projects with dispersive soil in seasonally frozen regions are susceptible to landslide failures. The mechanism of such landslide failures has not been fully understood thus far; therefore, it was investigated in this study by using on-site surveys, laboratory tests, and theoretical calculations. The results showed that the landslides of dispersive soil in seasonally frozen regions could be categorized as shallow-seated landslides and deep-seated landslides. The preconditions for landslide occurrence were soil mass looseness and cracks, caused by freeze-thawing. The degradation of dispersive soil led to a rapid influx of water into the soil. The reason for shallow-seated landslides was that the numerous sodium ions present in the soil mass dissolved in water and damaged the soil structure, resulting in a substantial reduction in shear strength. The reason for deep-seated landslides, however, was the erosion due to rainfall infiltration after the shallow-seated landslides caused tensile cracks at the top of the slope, leading to soil instability. Landslide failures occurred when the dispersing soil slope underwent freeze-thawing and saturated soaking. The sliding surface was initiated at the top of the slope and gradually progressed to the bottom along the interface between the soil layers.

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Assessment and Modification of Sherard Chemical Method for Evaluation of Dispersion Potential of Soils

Cited by 35 publications

References 7 publications

Effect of Silica Fume as a Waste Material for Sustainable Environment on the Stabilization and Dynamic Behavior of Dispersive Soil

Effect of Silica Fume as a Waste Material for Sustainable Environment on the Stabilization and Dynamic Behavior of Dispersive Soil

Evaluation of Softening of Clayey Soil Stabilized with Sewage Sludge Ash and Lime

Landslide Failure Mechanisms of Dispersive Soil Slopes in Seasonally Frozen Regions

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