Experimental Studies on Drying‐Wetting Cycle Characteristics of Expansive Soils Improved by Industrial Wastes

Hao, Yue; Chu, Chengbin; Xu, Long; Guo, Kunlong; Li, Dong

doi:10.1155/2018/2321361

Cited by 26 publications

(19 citation statements)

References 16 publications

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“…Ma et al [21] used nuclear magnetic resonance (NMR) technology to study the change law of water content in the drywet cycle and explained the change mechanism of the pore in SWCC. Whereafter, some scholars studied SWCC under complex conditions such as dry-wet cycle and freeze-thaw cycle [22][23][24][25][26][27][28][29]. It can be seen that these studies are aimed at the expansive soil in a particular area, and the SWCCs of expansive soils in different areas have different laws under the external conditions such as dry-wet cycle and freezethaw cycle.…”

Section: Introductionmentioning

confidence: 99%

Study on Soil‐Water Characteristics of Expansive Soil under the Dry‐Wet Cycle and Freeze‐Thaw Cycle considering Volumetric Strain

Niu

Zhang

Zhao³

et al. 2021

Advances in Civil Engineering

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This paper targets the expansive soils in Heilongjiang and Ankang to explore the influence of initial dry density, dry-wet cycle, and freeze-thaw cycle on the soil-water characteristics. The centrifuge method was used to obtain the soil-water characteristic curves (SWCCs) with different conditions. The volumetric strain of SWCC was modified based on the shrinkage test, and the corresponding fitting equations considering different factors were established. The results show that the volumetric water content is modified to consider the volume shrinkage effect of expansive soil, and the modification is more obvious in the high matric suction range. The smaller the initial dry density is, the worse the water-holding capacity of the sample is, and the smaller the air intake value is. The greater the time of the dry-wet cycle is, the greater the saturated volumetric water content of the sample is, and the corresponding water-holding capacity is significantly reduced. When the dry-wet cycle increases to a certain extent, the structure becomes stable. With the increase of the freeze-thaw cycle, the saturated volumetric water content first decreases and then increases. Similarly, after several times of the freeze-thaw cycle, the structure is basically stable. The fitted Gardner model equations under different conditions were proved to be able to describe the SWCCs of the two targeted expansive soils.

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Section: Introductionmentioning

confidence: 99%

Study on Soil‐Water Characteristics of Expansive Soil under the Dry‐Wet Cycle and Freeze‐Thaw Cycle considering Volumetric Strain

Niu

Zhang

Zhao³

et al. 2021

Advances in Civil Engineering

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“…Rao et al [14] observed a negative effect of the W-D cycles on lime-stabilized and wood-ash-modified black cotton soil. Ye et al [15] described variations in the unconfined compression strength and the Atterberg limits of expansive soils improved by industrial wastes with the W-D cycles. Wang et al [16] showed that the strength of expansive soil improved by 0.3% OTAC (octadecyl trimethyl ammonium chloride)-3%KCL lost gradually with the W-D cycles.…”

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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“…In recent years, as environmental protection issues have drawn increasing attention, scholars have started to use various types of solid wastes as additives for expansive soil stabilization [12], such as fly ash [13], blast furnace slag [14,15], cement kiln dust [16,17], waste foam particle [18], alkali residue [19], and so on. Sometimes, some wastes can also be mixed with cementitious material during stabilization of expansive soil, for example, fly ash and lime [20,21], bagasse ash and lime [22], natural volcanic ash and lime [23], phosphogypsum and lime [24], ground granulated blastfurnace slag and lime [25], iron tailing sands, and calcium carbide slag [26]. ese mixtures can achieve better results than cementitious material alone.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Cementitious Material from Residual Rice Husk Ash and Lime in Stabilization of Expansive Soil

Liu

Yunhe

Namdar

et al. 2019

Advances in Civil Engineering

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Geological disasters often occur due to expansion and shrinkage properties of expansive soil. This paper presents a cementitious material combined with rice husk ash (RHA) obtained from biomass power plants and lime to stabilize expansive soil. Based on compressive and flexural strength of RHA-lime mortars, blending ratio of RHA/lime was adopted as 4 : 1 by weight for soil stabilization. When mix proportion of RHA-lime mixture varied from 0% to 20%, specific surface area of stabilized expansive soil decreased dramatically and medium particle size increased. The deformation and strength properties of stabilized expansive soil were investigated through swelling test, consolidation test, unconfined compression test, direct shear test, and so on. With increase in RHA-lime content and curing time, deformation properties including swelling potential, swelling pressure, compression index, crack quantity, and fineness of expansive soil lowered remarkably; meanwhile, strength properties involving unconfined compressive strength, cohesion, and internal friction angle improved significantly. Considering engineering performance and cost, mix proportion of 15% and initial water content of 1.2 times optimum moisture content were recommended for stabilizing expansive soil. In addition, effectiveness of RHA-lime to stabilize expansive soil was achieved by replacement efficiency, coagulation reaction, and ion exchange.

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Experimental Studies on Drying‐Wetting Cycle Characteristics of Expansive Soils Improved by Industrial Wastes

Cited by 26 publications

References 16 publications

Study on Soil‐Water Characteristics of Expansive Soil under the Dry‐Wet Cycle and Freeze‐Thaw Cycle considering Volumetric Strain

Study on Soil‐Water Characteristics of Expansive Soil under the Dry‐Wet Cycle and Freeze‐Thaw Cycle considering Volumetric Strain

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

Utilization of Cementitious Material from Residual Rice Husk Ash and Lime in Stabilization of Expansive Soil

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