Influence of electro-osmosis on physicochemical parameters and microstructure of clay soils

Korolev, V. A.; Nesterov, D.S.

doi:10.1080/10934529.2019.1571321

Cited by 11 publications

(11 citation statements)

References 15 publications

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“…In summary, the hydration product of cement combined with fly ash produced a large amount of clay particles, which increased the size of the soil particles, obviously improving the soil strength. The fly ash reacted with the hydration reactant Ca(OH) 2 of cement to form a hydrating gel [37], which created a new skeleton between the particle pores and enhanced its ability to resist deformation.…”

Section: Micro Analysismentioning

confidence: 99%

Compression Characteristics and Microscopic Mechanism of Coastal Soil Modified with Cement and Fly Ash

Zhu

Wang

et al. 2019

Materials

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It is of great significance to study the consolidation characteristics of modified coastal cement-soil. A one-dimensional consolidation test and microscopic test were carried out. In the tests, the cement content was 20%, fly ash content was 0%, 5%, 10%, 20%, and 30%, and the water content was 80%. The consolidation test results showed that: (1) Compared with coastal cement soil, the deformation of coastal cement soil modified with a 20% fly ash content was reduced from 4.31 to 2.70 mm, and the vertical compression deformation was reduced by 1.61 mm. (2) During consolidation and compression, the e–p curve (pore ratio-pressure curve) of fly ash-modified coastal cement soil was slower than that of coastal cement soil and the rate of change of pore ratio. (3) The compression coefficient of fly ash-modified coastal cement soil was reduced from 0.780 to 0.598 MPa-1 compared with that of coastal cement soil. The microscopic test results indicate that after adding the proper amount of fly ash, a skeleton was formed between the microscopic particles of the sample, which improved its resistance to compression and deformation. The results of this study indicate that it is feasible to modify coastal cement soil with an appropriate amount of fly ash to improve its compression resistance.

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Section: Micro Analysismentioning

confidence: 99%

Compression Characteristics and Microscopic Mechanism of Coastal Soil Modified with Cement and Fly Ash

Zhu

Wang

et al. 2019

Materials

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“…Electrokinetic purification is used to clean soil from cyanides, oil and/or oil derivatives, heavy metals, cyanides or organic chlorides. The soils for which electrokinetic purification can be successfully applied include the clay and the loamy ones partially or completely saturated with moisture (Korolev, 2009;Korolev, Nesterov, 2019).…”

Section: Fig 1 Scheme Of a Field Device For In Situ Soil Cleanup Using Electroosmotic Methodmentioning

confidence: 99%

Significance of Trace Element Composition of Soils and Problems of Their Remediation

Ermakov¹,

Jovanović²

2021

First International Thematic Monograph Green Economy in the Era of Fourth Industrial Revolution

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“…pH is also an additional parameter that needs to be considered during the electrochemical process, and OHion is transferred from cathode surface to anode [43]. This leads to the H + ion movement from the anode surface to the cathode to neutralize and obstruct OHion movement [8,44].…”

Section: Ph Vs Sample Locationmentioning

confidence: 99%

“…The microfabric/particle arrangement of soil can be investigated with representative scanning electron microscopy (SEM) of the dried soil before and after the electro-osmosis process [40]. Soil properties and characteristics depend on the intermediate microstructure of dispersed and flocculated soil [43,[46][47][48]. The compressibility and consolidation characteristics are the results of clay matrices, interstitial pore spaces, diffuse double layer (DDL), and soil particles aggregation [42,49] These physical characteristics can be recognized with the SEM image for all microstructure features like particle arrangements, particle assemblage and pore spaces [50] At anode front Original soil At cathode front Figure 8.…”

Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

Consolidation Assessment of Marine Clay Using Electrokinetic Coupled with Constant Load

Singh¹,

Paramkusam²,

Prasad³

2022

cea

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In Marine clays, the consolidation phenomenon is a significant issue of concern. For this, an innovative electrokinetic consolidation method was adopted by coupling the conventional consolidation technique with a constant voltage gradient. A series of tests were performed on reconstituted marine clay samples for constant loading intensity of 4kg/cm² coupled with a constant DC voltage of 2, 4 and 6V. Various parameters such as deformation, void ratio, current, pH, voltage and moisture content were continuously monitored to compare with test results of conventional Incremental loading (IL) and constant loading (CL) techniques. In the case of electrokinetic (EK) coupled loading, with an increase in voltage gradient, the values obtained for voltage and current were also increased to maximum and then decreased afterwards. Microfabric changes were also visible in soils collected at anode and cathode, which were evidenced with the images of scanning electron microscopy (SEM) data obtained before and after EK consolidation tests when compared with original marine clay. The constant loading intensity of 4kg/cm 2 with a 4V electric gradient resulted in higher compression and better consolidation characteristics than other loading conditions.

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Influence of electro-osmosis on physicochemical parameters and microstructure of clay soils

Cited by 11 publications

References 15 publications

Compression Characteristics and Microscopic Mechanism of Coastal Soil Modified with Cement and Fly Ash

Compression Characteristics and Microscopic Mechanism of Coastal Soil Modified with Cement and Fly Ash

Significance of Trace Element Composition of Soils and Problems of Their Remediation

Consolidation Assessment of Marine Clay Using Electrokinetic Coupled with Constant Load

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