Effect of wetting–drying cycles on swelling behavior of lime stabilized sand–bentonite mixtures

Akcanca, Fehime; Aytekin, Mustafa

doi:10.1007/s12665-011-1207-5

Cited by 36 publications

(11 citation statements)

References 30 publications

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“…Guney et al [17] investigated impacts of cyclic W-D on swelling behavior of lime-stabilized soil and found that the initial beneficial effect of lime stabilization was lost after the first W-D cycle. Akcanca and Aytekin [18] found that the beneficial effect of lime stabilization to control the swelling pressures of sand-bentonite mixtures would be partly lost by the W-D cycles, while in Yazdandoust and Yaarobi's study [19], investigation on effect of cyclic W-D on swelling behavior of plymer-stabilized expansive clays showed that the beneficial effect of polymer stabilization would be preserved.…”

Section: Introductionmentioning

confidence: 94%

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: 94%

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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“…A large number of studies have been conducted on the effect of wetting-drying cycles on properties of compacted soil. Most are focused on the mechanical and deformation behaviours [3][4][5][6][7]. It has been discovered that soil strength may decrease after a certain number of wetting-drying cycles.…”

Section: Introductionmentioning

confidence: 99%

Effect of Wetting‐Drying Cycles on Mechanical Behaviour and Electrical Resistivity of Unsaturated Subgrade Soil

Zhi

Peng

et al. 2019

Advances in Civil Engineering

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Compacted soil is widely used in road and railway subgrade, while alternation of seasons can cause fluctuations in moisture content of soil (i.e., wetting-drying cycles) and influence the performance of soil. In order to research the effect of wetting-drying cycles on mechanical behaviour and electrical resistivity of compacted unsaturated subgrade soil, wetting-drying tests considering different number and cyclic amplitude were conducted on compacted unsaturated clay specimens, and the electrical resistivity and unconfined compressive strength of soil were measured in this study. The AC (alternative current) two-electrode method was applied in the resistivity measurement. The experimental results show that increasing number and cyclic amplitude of wetting-drying cycles can both reduce the strength and electrical resistivity of the compacted unsaturated specimens. After 3-4 wetting-drying cycles, the strength and electrical resistivity tend to be constant value. The change of pore structure can be the key factor leading to the reduction of electrical resistivity of soil subjected to wetting-drying cycles and consequently causing the decrease of soil strength in the present study. Thus, the electrical resistivity can be adopted to indirectly assess the mechanical behaviour of unsaturated compacted soil after wetting-drying cycles.

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“…cement, lime, fibre, fly ash, and silica fume (Akcanca and Aytekin 2012;Al-Rawas et al 2005;Dash and Hussain 2012;Guney et al 2007;Harianto et al 2008;Kalkan 2009;Miller and Azad 2000;Nalbantoğlu 2004;Rifai 2000;Tastan et al 2011;Walker 1995). In general, these studies have shown that the cracks in the soil can be suppressed but the soil hydraulic conductivity will increase.…”

Section: Introductionmentioning

confidence: 99%

Soil-water characteristic curves and hydraulic conductivity of nanomaterial-soil-bentonite mixtures

Taha

2015

Arab J Geosci

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This study evaluates the influence of nanomaterials (nano-copper and nano-alumina) on the suction and hydraulic conductivity of compacted soil-bentonite mixture with different plasticity indexes. The soil suction and hydraulic conductivity of the compacted soil-bentonite mixtures were measured before and after the addition of nanomaterials. Soil-water characteristic curves were then developed for compacted soil samples (with and without nanomaterial) using a pressure membrane apparatus. It was found that saturated water content was lower in the soil samples mixed with nanomaterials. The soil hydraulic conductivity also decreased with increasing nanomaterial content, except for S3 soil sample with nanocopper content. The decrease of hydraulic conductivity was possibly caused by the reduction of the effective porosity due to pore clogging. The results from testing samples after one to four drying times show that the largest rise in soil hydraulic conductivity occurred at first or second drying. Adding nanomaterials can reduce the soil hydraulic conductivity by as much as seven times for soil samples with high clay (bentonite) content.

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Effect of wetting–drying cycles on swelling behavior of lime stabilized sand–bentonite mixtures

Cited by 36 publications

References 30 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

Effect of Wetting‐Drying Cycles on Mechanical Behaviour and Electrical Resistivity of Unsaturated Subgrade Soil

Soil-water characteristic curves and hydraulic conductivity of nanomaterial-soil-bentonite mixtures

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