Experimental investigation of the geotechnical properties and microstructure of lime-stabilized saline soils under freeze-thaw cycling

Liu, Yaowu; Wang, Qing; Liu, Shouwei; ShangGuan, Yunlong; Fu, Huicheng; Ma, Bing; Chen, Huie; Yuan, Xiaoyan

doi:10.1016/j.coldregions.2019.03.003

Cited by 100 publications

(40 citation statements)

References 32 publications

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“…After Svensson & Hansen (2010), ice lensing absorbed water from the surrounding zone and induced dehydration of clay particle in the unfrozen zone. Cracks and larger voids induced by F-T cycles at the aggregates scale were observed by Liu et al (2019) and Olgun (2013) through scanning electron microscopy.…”

Section: Discussionmentioning

confidence: 97%

Effect of freeze-thaw cycles on mechanical strength of lime-treated fine-grained soils

Nguyen

Cui

Ferber³

et al. 2019

Transportation Geotechnics

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Lime treatment is a widely-used technique for the stabilization and improvement of finegrained soils in earthworks for transportation. In cold regions, lime treatment can be considered as an appropriate method to improve freeze-thaw resistance of fine-grained soils. The effectiveness of treatment can depend on soil nature, lime dosage and curing time. In the present work, three soils (silt of low plasticity, clay of low plasticity, and silt of high plasticity) were treated at three lime contents (lower, equal and higher than the lime fixation point) at four curing periods (7, 28, 90 and 365 days). The mechanical strength was determined from unconfined compression test performed on specimens having a diameter of 100 mm and a height of 100 mm. Freeze-thaw cycles were applied by varying the specimen temperature between-20°C and 20 °C, the specimens being beforehand saturated. The mechanical strength of specimen subjected to ten freeze-thaw cycles was compared to those maintained in laboratory temperature (20 °C). Results showed that freeze-thaw cycles significantly decrease the mechanical strength of sample. This decrease can be explained by damage induced by ice lenses formation/thawing during freeze-thaw cycles, as illustrated by the observation at X-ray computed tomography. Interestingly, lime treatment mitigates this damage and increase the soil freeze-thaw resistance. The treatment appears more efficient for lower plasticity soil, a higher lime content, and a longer curing time. This conclusion seems depend on the specimen preparation procedure.

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Section: Discussionmentioning

confidence: 97%

Effect of freeze-thaw cycles on mechanical strength of lime-treated fine-grained soils

Nguyen

Cui

Ferber³

et al. 2019

Transportation Geotechnics

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“…The tightly wrapped samples were put into the curing box with 20℃ and 95% relative humidity for maintenance. Liu et al (2019) [4] has carried out mechanical experiments on lime-stabilized soil under freeze-thaw cycles and analyzed its mechanism. Sun (2017) [31] carried out mechanical tests on unsaturated saline soil and lime-stabilized soil under freezethaw cycles.…”

Section: Control Switchmentioning

confidence: 99%

“…The western part of Jilin Province is located in the southwestern part of China's Songnen Plain. It is one of the world's three major soda alkaline soil distribution areas, and is also the largest area of soda alkaline soil in China [1][2][3][4]. In the past 20 years, not only the total area of saline soil has expanded rapidly, but also the degree of soil salinization has increased greatly, and the ecological environment is very fragile [5,6].…”

Section: Introductionmentioning

confidence: 99%

Effect of Freeze-Thaw Cycle on Shear Strength of Lime-Solidified Dispersion Soils

Meng

Wang

et al. 2020

Civ Eng J

Self Cite

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The freeze-thaw cycle of saline soil in the seasonal frozen area will produce diseases such as frost heave and thaw settlement, road frost boiling, collapse and uneven settlement. In order to reduce the occurrence of these undesirable phenomena, it is often necessary to improve the saline soil in engineering. In this paper, the typical carbonate saline soil in the west of Jilin Province, China is taken as the research object. By adding different content of lime (0%, 3%, 6%, 9%, 12%, 15%), the change of mechanical strength of lime solidified saline soil under different freeze-thaw cycles (0, 1, 3, 6, 10, 30, 60 times) is studied. The mechanical analysis is carried out by combining particle size analysis test and SEM image. The test results show that although repeated freeze-thaw cycles make the soil structure loose and the mechanical strength greatly reduced, the soil particles agglomerate obviously after adding lime, its dispersion is restrained by the flocculation of clay colloid, and the shear strength of soil is improved by the increase of the cohesive force between clay particles, and the optimal lime mixing ratio of the saline soil in this area is 9%.

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“…Therefore, the results significantly exceeded the percentage determined by [34] of 0.5%. The saline content in the Middle East soils is determined by sulphate, chlorides, calcium carbonate, sodium and magnesium [40].…”

Section: Total Dissolved Salts (Tds)mentioning

confidence: 99%

Study and GIS-Based Mapping of Soil Chemical Properties in Kirkuk City, Iraq

Sulyman¹,

Noori²,

Al-Attar³

2020

Proceedings of the Proceedings of the 1st International Multi-Disciplinary Conference Theme: Sustainable Development and Smart

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The study included selecting seven sites in Kirkuk city to determine the soil chemical properties characteristics. The samples were collected and analyzed laboratory for the period from November 2016 and for three months at the rate of three samples per site. The main objective is to study the chemical properties of the soil of the selected areas. Also, the GIS technique has used to predict soil maps. However, soil chemical properties have analyzed for samples. The highest measurement concentrations of chemical properties (pH, Electrical conductivity, organic material, total soluble salts, gypsum, total carbonates, nitrates, chlorides and sulphates) were (9, 1695 µS/cm, 6.488%, 847.5%, 3.57%, 6 mg/l, 1290 mg/l and 4.57 mg /l) respectively. Furthermore, Inverse Distance Weighting (IDW) interpolation technique has used to produce geotechnical maps of the study area. The soil in the study area tends to be basal According to the chemical properties measurements.

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Experimental investigation of the geotechnical properties and microstructure of lime-stabilized saline soils under freeze-thaw cycling

Cited by 100 publications

References 32 publications

Effect of freeze-thaw cycles on mechanical strength of lime-treated fine-grained soils

Effect of freeze-thaw cycles on mechanical strength of lime-treated fine-grained soils

Effect of Freeze-Thaw Cycle on Shear Strength of Lime-Solidified Dispersion Soils

Study and GIS-Based Mapping of Soil Chemical Properties in Kirkuk City, Iraq

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