Effect of Freeze—Thaw Cycles on Mechanical Behavior of Lime-Stabilized Soil

Tebaldi, Gabriele; Orazi, Michele; Orazi, Ugo Sergio

doi:10.1061/(asce)mt.1943-5533.0001509

Cited by 54 publications

(10 citation statements)

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“…However, lime addition improved the strength of soil, either subject to F-T cycles or not. Tebaldi et al (2016) found that mechanical performances of a lime-stabilized clay soil was less affected by F-T cycles compared to untreated soil. Bozbey et al (2018) studied a lime stabilized clay and found the importance of using higher lime contents and extended curing time for increasing F-T resistance.…”

Section: Introductionmentioning

confidence: 92%

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: Introductionmentioning

confidence: 92%

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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“…A significant part of the conducted experiment deals with road construction in areas with seasonally frozen soils, as well as problems associated with freezing-thawing of the roadway and its subgrade, such as settlement, frost heaving, and slope sliding (Ling et al, 2009;Li et al, 2016;Tebaldi et al, 2016) [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Strength Characteristics of Silty-Clayey Soils during Freezing-Thawing Cycles

et al. 2022

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Destructuring settlements due to frost heave during the structures’ exploitation are often not taken into account at the designing stage, although they are indirectly related to the bearing capacity of the soils. The objective of this research was analyzing the effect of the number of freezing-thawing cycles on the strength characteristics of soils. A paired experiment with various initial parameters (void ratio, initial moisture content, and the number of freezing-thawing cycles) was carried out. According to the experimental results, the cohesion largely depends on the above parameters which might lead to its decrease by up to three times. The angle of internal friction demonstrated an indefinite behavior during the freeze-thaw cycles, which is confirmed by a literature review. Freezing–thawing cycles significantly decrease the soil bearing capacity: up to 44% after 10 freezing-thawing cycles for soil with and . However, in the case of and it increased by 33%. A program based on the least-squares method was used to calculate the approximation coefficients of the dependence describing the changes in strength characteristics from the abovementioned parameters. Changes in strength characteristics must be taken into account when designing structures, as they can lead to additional settlement or even subsidence of the foundations.

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“…Although the incorporation of cement can improve the clay strength to a certain extent, poor frost resistance is one disadvantage of cement-treated clay. The mechanical properties of this type of foundation change considerably under the freezethaw cycles with serious freeze-thaw damage, which may lead to differential settlement and instability after construction similar to nature coastal clay [11][12][13][14]. Application of cement stabilization in areas that undergo seasonal freezing has always been a major issue in engineering practice [15,16].…”

Section: Introductionmentioning

confidence: 99%

Unconfined Compressive Properties of Fiber-Stabilized Coastal Cement Clay Subjected to Freeze–Thaw Cycles

Zhu

Zhang

et al. 2021

JMSE

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This study aimed to investigate the feasibility of using polypropylene fiber-cement-stabilized coastal clay as base-course material or foundation material for city sustainable development by assessing its mechanical performance. The influence of the number of freeze–thaw cycles and curing ages on the mechanical properties of ordinary cemented clay (OCC) and polypropylene fiber-cemented clay (PCC) was investigated by using unconfined compressive test. The experimental results show that the addition of fiber with 1% content can increase the strength as well as the ductility of cemented clay by 12.5% and 15.6%, respectively. The strength of PCC and OCC at 22d age was 1.5 times than at 7d age. Under differently timed freeze–thaw cycles, the mechanical performance of PCC is improved, and, better than that, OCC improves by 11.8% in strength, 16.5% in strain and by 5% in degree of damage, indicating that fiber can improve the freeze–thaw resistance of cemented clay. The frost resistance of PCC and OCC increases with the increase in curing age. Finally, the variation of strength of OCC was explained through the change of micro-structure while the strength enhancing mechanism of polypropylene fiber for cemented clay was also revealed.

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Effect of Freeze—Thaw Cycles on Mechanical Behavior of Lime-Stabilized Soil

Cited by 54 publications

References 0 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

Evaluation of the Strength Characteristics of Silty-Clayey Soils during Freezing-Thawing Cycles

Unconfined Compressive Properties of Fiber-Stabilized Coastal Cement Clay Subjected to Freeze–Thaw Cycles

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