The Effect of Superabsorbent Polymer on the Resilient and Plastic Strain Behavior of Cemented Soil under Traffic Load

Dai, Dongjuan; Peng, Jie; Bai, Lanlan; Li, Gang; Lin, Hongmin

doi:10.3390/polym14050929

Cited by 7 publications

(6 citation statements)

References 50 publications

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“…According to our previous study [40], the field measured data show that the dominant frequency is only 1 Hz when the depth is 3.12 m. In addition, Dai et al [41] and Guo et al [42] pointed out that 1 Hz can represent the actual frequency of traffic loading. Hence, the loading frequency used in this paper was 1 Hz.…”

Section: Specimen Preparation and Experimental Schemementioning

confidence: 87%

Accumulative Strain of Sand-Containing Soft Soil Reinforced by Cement and Sodium Silicate under Traffic Loading

Chen

et al. 2022

Sustainability

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The accumulative strain of sand-containing soft soil is crucial to the stability of the construction of embankment engineering such as expressways and high-speed railways. However, little attention has been devoted to the accumulative strain of sand-containing soft soil. In the current study, a series of cyclic triaxial tests were performed to investigate the accumulative strain of sand-containing soft soil reinforced by cement and sodium silicate under traffic loading. In addition, the accumulative strain model was proposed to describe the characteristic of accumulative strain. The results show that for the specimens with a high sand content (25%, 30%, and 35%), the accumulative strain increases obviously with the increase of the sand content. For the specimen with a cement content of 3%, the accumulative strain increases distinctly with the increasing loading time. The accumulative strain is strongly influenced by confining pressure. When the repeated cyclic stress amplitude is greater than 0.17 kN, the increase rate of accumulative strain is greater. The shorter the curing time is, the greater the accumulative strain is. The calculated results of the accumulative strain model show a good agreement with test data. Hence, the accumulative strain model can better describe the characteristic of accumulative strain.

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Section: Specimen Preparation and Experimental Schemementioning

confidence: 87%

Accumulative Strain of Sand-Containing Soft Soil Reinforced by Cement and Sodium Silicate under Traffic Loading

Chen

et al. 2022

Sustainability

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“…In order to investigate the impact of repeated cyclic stress amplitude on the cyclic and post-cyclic behavior in more detail, the repeated cyclic stress amplitudes range from 0.124 kN to 0.25 kN. According to previous studies [42,43], the conclusion that the confining pressures of 50 kPa, 100 kPa, and 150 kPa can represent the actual confining pressures of traffic loading can be achieved. Moreover, in order to investigate the influence law of confining pressure on the cyclic and post-cyclic behavior in more detail, the maximum confining pressure is 300 kPa.…”

Section: Test Procedures and Experimental Schemementioning

confidence: 99%

Cyclic and Post-Cyclic Behaviors of Stabilized Sand-Containing Soft Soil in Coastal Areas

Zhao

et al. 2022

Sustainability

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Land resources are being depleted due to global climate change, and as a result, infrastructures such as expressways and high-speed railways have no option but to be built in soft soil regions. Hence, the cyclic and post-cyclic behaviors of soft soil are vitally important. However, little attention has been devoted to this issue. In the current study, a series of cyclic triaxial tests and standard monotonic loading tests were carried out in order to investigate the cyclic and post-cyclic behavior of stabilized sand-containing soft soil. In addition, the stiffness evolution index model was proposed to describe the characteristics of stiffness evolution. The results show that for a given number of loading cycles, stiffness almost linearly decreases with the increase in sand content. The higher the confining pressure is, the greater the stiffness is. The cement content has the greatest impact on the stiffness evolution index. The stiffness evolution index model can provide a good description of experimental data. The initial value of post-cyclic axial strain is non-zero due to the accumulative strain caused by previous cyclic loading. Post-cyclic stress increases rapidly within a small range of strain and can reach peak stress with great speed. The post-cyclic initial tangent modulus increases from 1602 kPa to 4803 kPa as the cement content increases from 6% to 12%.

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“…Simultaneously, it also has a typical plastic deformation process that differs from concrete. In other words, the NSS stress–strain constitutive relationship should be somewhere between soil and concrete [ 17 , 22 ], and it would be more suitable for the deformation characteristics to regard NSS as an elastoplastic material. Therefore, the constitutive model of NSS under uniaxial compression could be investigated by referring to the stress–strain curve law of concrete [ 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Characterization and Constitutive Modeling of Nano-Stabilized Soil under Uniaxial Compression

et al. 2023

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The stress–strain constitutive model under uniaxial compression is a basic element and important characterization method for determining physical and mechanical properties in cement-based materials research. In this study, a stress–strain constitutive model under uniaxial compression was established, which was based on a new nano-stabilized soil (NSS) through typical mechanical tests and constitutive relationship research. The results indicate that the unconfined compressive strength (UCS) of the nano-stabilized soil was enhanced with the increase in curing period and nano-stabilizer dosage, and that the strength growth rate reaches the maximum at a 12% dosage in the tested samples. The UCS of NSS under a 12% dosage is about 10~15% higher than that of ordinary stabilized soil (SS) without nano doping, and 25~40% higher compared with grade 42.5 cement-soil. The established constitutive model could accurately describe the linear-elastic and elastic-plastic deformation characteristics of NSS under uniaxial compression, which will be conducive to revealing the curve variation law of the stress–strain process. The research results could provide scientific support for the theoretical innovation and engineering application of green environmental protection materials.

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The Effect of Superabsorbent Polymer on the Resilient and Plastic Strain Behavior of Cemented Soil under Traffic Load

Cited by 7 publications

References 50 publications

Accumulative Strain of Sand-Containing Soft Soil Reinforced by Cement and Sodium Silicate under Traffic Loading

Accumulative Strain of Sand-Containing Soft Soil Reinforced by Cement and Sodium Silicate under Traffic Loading

Cyclic and Post-Cyclic Behaviors of Stabilized Sand-Containing Soft Soil in Coastal Areas

Mechanical Characterization and Constitutive Modeling of Nano-Stabilized Soil under Uniaxial Compression

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