Effect of Freeze-Thaw Cycles on Mechanical Behavior of Compacted Fine-Grained Soil

Li, Guoyu; Ma, Wei; Zhao, Shuping; Mao, Yuncheng; Mu, Yanhu

doi:10.1061/9780784412473.008

Cited by 14 publications

(4 citation statements)

References 16 publications

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“…In Equation ( 4), in σ 0 and σ n (the UCS values of the sample not subjected to F-T cycles and after the F-T cycles), n is the number of F-T cycles (1, 3,5,7,9,11).…”

Section: Test Results For Samples After Freeze-thaw Cyclesmentioning

confidence: 99%

“…Repeating this process in each F-T cycle expands the soil volume and has an adverse effect on its mechanical properties. Thus, microstructural changes lead to variations in mechanical properties on a macroscopic scale, depending on many factors, such as climatic conditions, soil type (grain distribution, mineralogical structure) in addition to properties, water content, surcharge load, and temperature [6,7]. F-T processes under varying weather conditions may cause stability problems by affecting the thermal, mechanical, and physical properties of foundation soils or embankments in cold regions [8,9].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Microencapsulated Phase Change Material on the Behavior of Silty Soil Subjected to Freeze–Thaw Cycles

Gençdal

Kılıç

2023

Sustainability

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Freeze–thaw (F-T) cycles are one of the most important factors affecting the performance of silty soils with high kaolin content in seasonally freezing regions. This study investigates the improvement of a high-plasticity clayey silt soil (MH) with microencapsulated phase change material (mPCM) to prevent changes in mechanical properties when subjected to freeze–thaw cycles. Unconfined compression, one-dimensional compression, and freeze and thaw tests were performed to evaluate the behavior of treated soil under different freeze/thaw cycles and with different mPCM ratios. It has been observed that the mPCM additive decreased the unconfined compression strength (UCS); however, the strength of the soil held constant during the increasing F-T cycles, and the increase in the mPCM additive content increased the strength of the soil. The inclusion of mPCM affected the compression of the soil and increased settlement (∆H), although the settlement remained constant with increasing freeze–thaw cycles. It has been noted that the compression behavior, which is least affected by the unconfined compressive strength and freeze/thaw cycles, is achieved with the addition of 10% mPCM. As a result of the tests, it was determined that the most suitable additive mPCM ratio is 10% for the compression and strength behaviors.

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“…In Equation ( 4), in σ 0 and σ n (the UCS values of the sample not subjected to F-T cycles and after the F-T cycles), n is the number of F-T cycles (1, 3,5,7,9,11).…”

Section: Test Results For Samples After Freeze-thaw Cyclesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Microencapsulated Phase Change Material on the Behavior of Silty Soil Subjected to Freeze–Thaw Cycles

Gençdal

Kılıç

2023

Sustainability

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“…In Figure 10, the main peaks of the specimens were mainly distributed between 0.1 ms and 10 ms and between 10 ms and 1000 ms according to The UCS of the stabilized soil generally decreased with the increase in the cycle number, which indicated that freeze-thaw erosion still had a deteriorating effect on the UCS of the soil. The UCS of the soils decreased because the freezing of the water made them swell, and repeated incidents of swelling made the soils looser and weaker [45]. In addition, the UCS of the RM-MgO stabilized soil (or the RM-CaO stabilized soil) was significantly higher than that of the pure MgO stabilized soil (or the pure CaO stabilized soil) after 10 freeze-thaw cycles.…”

Section: Nmrmentioning

confidence: 98%

Engineering Properties and Microstructure of Soils Stabilized by Red-Mud-Based Cementitious Material

Li,

Huang,

Chen

et al. 2024

Materials

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Red mud (RM) is an industrial waste generated in the process of aluminum refinement. The recycling and reusing of RM have become urgent problems to be solved. To explore the feasibility of using RM in geotechnical engineering, this study combined magnesium oxide (MgO) (or calcium oxide (CaO)) with RM as an RM-based binder, which was then used to stabilize the soil. The physical, mechanical, and micro-structural properties of the stabilized soil were investigated. As the content of MgO or CaO in the mixture increased, the unconfined compressive strength (UCS) of the RM-based cementitious materials first increased and then decreased. For the soils stabilized with RM–MgO or RM–CaO, the UCS increased and then decreased, reaching a maximum at RM:MgO = 5:5 or RM:CaO = 8:2. The addition of sodium hydroxide (NaOH) promoted the hydration reaction. The UCS enhancement ranged from 8.09% to 66.67% for the RM–MgO stabilized soils and 204.6% to 346.6% for the RM–CaO stabilized soils. The optimum ratio of the RM–MgO stabilized soil (with NaOH) was 2:8, while that of the RM–CaO stabilized soil (with NaOH) was 4:6. Freeze–thaw cycles reduced the UCS of the stabilized soil, but the resistance of the stabilized soil to freeze–thaw erosion was significantly improved by the addition of RM–MgO or RM–CaO, and the soil stabilized with RM–MgO had better freeze–thaw resistance than that with RM–CaO. The hydrated magnesium silicate generated by the RM–MgO stabilized soil and the hydrated calcium silicate generated by the RM–CaO stabilized soil helped to improve the UCS of the stabilized soil. The freeze–thaw cycles did not weaken the formation of hydration products in the stabilized soil but could result in physical damage to the stabilized soils. The decrease in the UCS of the stabilized soil was mainly due to physical damage.

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“…During times of temperate weather, the ice thaws. This repeated freeze-thaw action degrades the integrity of the soil microstructure, indicating possible changes D r a f t in particle aggregation and pore space distribution, and changes its engineering properties like bulk density, unconfined compressive strength, and hydraulic permeability (Rempel et al,2007;Qi et al, 2008;Lv et al, 2014), even though the soil has been well compacted (Li et al, 2012) Dempsey and Thompson (1973) evaluate different freeze-thaw cycle parameters for two typical Illinois soils stabilized with lime and cement, and advised on cooling rate, freezing temperature, length of freezing period, and thawing temperature. Viklander (1998) investigated the permeability and volume changes in compacted till due to freeze-thaw cycles, and found that vertical permeability slightly decreased with an increase in the number of freeze-thaw cycles.…”

mentioning

confidence: 99%

Volume change behaviour and microstructure of stabilized loess under cyclic freeze–thaw conditions

Wang

Baaj

et al. 2016

Can. J. Civ. Eng.

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Freeze–thaw action is considered to be one of the most destructive actions that can induce significant damage in stabilized subgrades in seasonally frozen loess areas. Laboratory tests including frost heave – thaw shrinkage and microstructure change during freeze–thaw cycles were conducted to evaluate the volume change rate of loess stabilized with cement, lime, and fly ash under the impact of cyclic freeze–thaw conditions. The loess specimens collapsed after eight freeze–thaw cycles (192 h), but most stabilized loess specimens had no visible damage after all freeze–thaw cycles were completed. All of the stabilized loess samples underwent a much smaller volume change than the loess alone after the freeze–thaw cycles. Although surface porosity and equivalent diameter of stabilized loess samples increased, the stabilized loess can retain its microstructure during freeze–thaw cycles when the cement content was less than 6%. To ensure freeze–thaw resistance of stabilized loess subgrades, the mix proportions of the three additives was recommended to be 4 to 5% cement, 6% lime, and 10% fly ash.

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Effect of Freeze-Thaw Cycles on Mechanical Behavior of Compacted Fine-Grained Soil

Cited by 14 publications

References 16 publications

Effects of Microencapsulated Phase Change Material on the Behavior of Silty Soil Subjected to Freeze–Thaw Cycles

Effects of Microencapsulated Phase Change Material on the Behavior of Silty Soil Subjected to Freeze–Thaw Cycles

Engineering Properties and Microstructure of Soils Stabilized by Red-Mud-Based Cementitious Material

Volume change behaviour and microstructure of stabilized loess under cyclic freeze–thaw conditions

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