Influences of Drying and Wetting Cycles and Compaction Degree on Strength of Yudong Silt for Subgrade and Its Prediction

Zhang, Junran; Jiang, Tong; Wang, Xingcui; Liu, Chong; Huang, Zhiquan

doi:10.1155/2018/1364186

Cited by 9 publications

(3 citation statements)

References 33 publications

(39 reference statements)

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“…Lime is a prevalent and effective additive that has been widely used for soil stabilization. Previous studies showed that lime addition can increase the optimum water contents, shrinkage limits, and strengths of the mixtures but decrease the liquid limits, plasticity indexes, and maximum dry densities of the mixtures [6][7][8][9][10][11][12][13]. However, in engineering practice, there are lots of environmental conditions which can affect the effect of chemical stabilization of soil foundations.…”

Section: Introductionmentioning

confidence: 99%

Behavior of Lime‐Stabilized Red Bed Soil after Cyclic Wetting‐Drying in Triaxial Tests and SEM Analysis

Song

Zhang²,

Mao

et al. 2020

Advances in Materials Science and Engineering

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Most red beds demonstrate inferior geotechnical properties in natural conditions and need to be improved when used as construction material. In this study, a serious of triaxial tests, permeability tests, and scanning electron microscopy (SEM) analysis were carried out on lime-stabilized and untreated red bed soil after experiencing different wetting-drying (W-D) cycles. e test results showed that, with the increase in the added lime, the shear strength, strength parameters (including the cohesion and the internal friction angle), and the shear modulus of red bed soil increased gradually. For the untreated specimens, the four parameters decreased considerably after experiencing W-D cycles, while for the lime-stabilized specimens, they generally increased with an increase in the W-D cycles. Without experiencing the W-D cycles, the permeability coefficient increased by two times after it was stabilized with 10% lime. But with an increase in the W-D cycles, the permeability coefficient of the untreated and lime-stabilized specimens continuously increased and significantly decreased, respectively. Finally, variations in microstructure of the red bed soil under the effects of the lime stabilization and W-D cycles were discussed based on the SEM analysis. e results may contribute to improvement of red bed soil when used as roadbed and airfield fillings.

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Section: Introductionmentioning

confidence: 99%

Behavior of Lime‐Stabilized Red Bed Soil after Cyclic Wetting‐Drying in Triaxial Tests and SEM Analysis

Song

Zhang²,

Mao

et al. 2020

Advances in Materials Science and Engineering

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“…Five soils including expansive soil (Zhang et al 2016) [12], silty soil (Zhang et al 2018) [13] and sandy soils (Wang et al 2017) [11] were chosen for the study considering the breadth of soil types. The particle size distribution curves of five soils are shown in Fig.…”

Section: Basic Properties Of the Five Soilsmentioning

confidence: 99%

A simple and practical method for predicting soil water characteristic curve based on grading parameters

Zhang

Wang

Lin

et al. 2019

JGS Special Publication

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For unsaturated soils, the soil water characteristic curve (SWCC), which represents the relationship between degree of saturation and suction, is a crucial function for determining both the soil hydraulic property and its coupled mechanical properties. However, because the tests for measuring the SWCC take a long time and the process is complicated. It is very necessary to propose a simple and practical method for predicting the SWCC of unsaturated soil. The grading curves and grading parameters of the five soils in the literature were obtained. And the fitting parameters a, n, m of the Fredlund and Xing model for five soils were obtained also. By means of the regression analysis between the grading parameters and fitting parameters of SWCC, a simple and practical method was proposed for predicting the SWCC curve based on the grading parameters. This may be helpful for engineering practice at an early stage when not much experimental data are available.

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“…Aldaood et al (2014) adding water from a burette and drying in air. Zhang et al (2018) performed direct shear tests on Silt subjected to cyclic submerging in water and drying in air. The existing research all indicates that dryingwetting cycles have negligible detrimental impacts on the mechanical properties of soil (Li et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Mechanical behaviour of soil under drying–wetting cycles and vertical confining pressures

Chao

Shi

Fowmes

2024

Environmental Geotechnics

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A system for preparing soil specimens subjected to drying-wetting cycles whilst under vertical confining pressures is introduced with Clayey soil specimens subjected to different drying-wetting histories, then the relative performance tested using consolidated undrained triaxial shear tests. Meanwhile, their soil water retention properties were also measured. The experimental results indicate that drying-wetting cycles lead to a rise in the matric suction for soil with high moisture content, and the decrease of matric suction for soil with low moisture content. Partly owing to the higher pore water pressure, peak shear strength reduces gradually during drying-wetting cycles. The impacts of drying-wetting cycles on hydro-mechanical properties of soil specimens during the first cycle are larger than those during the second and the third cycles as the highest matric suction of soil occurs during the first cycle. Vertical confining pressure is shown to limit the impact of drying-wetting cycles on the hydro-mechanical properties of soil effectively because of its restricting effects on the volumetric deformation of soil during the cycles.

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Influences of Drying and Wetting Cycles and Compaction Degree on Strength of Yudong Silt for Subgrade and Its Prediction

Cited by 9 publications

References 33 publications

Behavior of Lime‐Stabilized Red Bed Soil after Cyclic Wetting‐Drying in Triaxial Tests and SEM Analysis

Behavior of Lime‐Stabilized Red Bed Soil after Cyclic Wetting‐Drying in Triaxial Tests and SEM Analysis

A simple and practical method for predicting soil water characteristic curve based on grading parameters

Mechanical behaviour of soil under drying–wetting cycles and vertical confining pressures

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