Resilient Modulus—Physical Parameters Relationship of Improved Red Clay by Dynamic Tri-Axial Test

Yuan, Huixin; Li, Weiqiang; Wang, Yixian; Lin, Hang; Liu, Yan

doi:10.3390/app9061155

Cited by 16 publications

(6 citation statements)

References 60 publications

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“…Also, the scale factor is 0.075, and there are 4483 zones and 6254 grid points in the model. Furthermore, this study adopts the constitutive model of the Mohr-Coulomb elastoplastic model, [22][23][24][25][26][27][28][29][30] that is, the Mohr-Coulomb yield criterion is used. The left and right boundaries are constrained in the horizontal direction, and the bottom boundary is fixed in all directions.…”

Section: Slope Model and Refined Safety Factor 21 Slope Modelmentioning

confidence: 99%

Precise evaluation method for the stability analysis of multi-scale slopes

et al. 2020

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Slope stability analysis is a multi-scale problem. Typically, owing to the distinctions of slope scales (e.g., slope height or slope angle) in practical engineering, the stability calculation results of slopes with various scales from numerical methods inevitably exhibit different computational precision levels in the case of identical computational grids, and therefore the stability results of different slopes cannot be compared. To achieve equal accuracy stability analysis for multi-scale slopes, this study establishes numerical models of slopes with various scales as well as different grid shapes and sizes to conduct stability analysis. The results show the following: (a) a positive correlation relationship exists between the safety factor of the slope and the scaling factor, which is defined as the ratio of the grid size to the slope height; (b) the definition of the refined safety factor is given, representing the safety factor that corresponds to the infinitesimal grid size and eliminating the computational error of slope stability analysis caused by grid size or shape; (c) on this basis, embarking on the composite influence of multiple scales of slope on stability analysis, the study proposes a simplified treatment method suitable for evaluating the refined safety factor of the multi-scale slopes, which is verified as valid and feasible by some examples.

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Section: Slope Model and Refined Safety Factor 21 Slope Modelmentioning

confidence: 99%

Precise evaluation method for the stability analysis of multi-scale slopes

et al. 2020

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“…e red clay was widely distributed in southern China and it is often used as building materials or natural foundations of buildings. Since the red clay has swell-shrink characteristics and high plasticity index [1][2][3], it often induces many geo-hazards such as road cracking, uneven foundation settlement, slope instability, pit deformation, and destruction [4][5][6]. It was realized that the traditional soil solidifying materials such as cement, lime, and flyash had drawbacks of high costs and long construction periods, which could not meet the needs of the construction and social development [7,8].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Ionic Soil Stabilizer Dilution and Understanding the Mechanism in Red Clay Treatment

Luo

Wan

2021

Advances in Civil Engineering

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Due to the insufficient understanding of the mechanism for soil strengthening by using Ionic Soil Stabilizer (ISS), the application of ISS in soil treatment is limited. In this paper, red clay samples were treated by using ISS and the effects were examined by the Atterberg test and uniaxial pressure test. In order to understand the mechanism, ISS dilution-based seepage test and ξ-potential test have been carried out. The results show that the ISS-Water mixture of 1 : 200 was the most effective ratio to reduce the plasticity index. The measurements indicate the thickness of the pair-electricity layer of adjacent clay layers and the repulsion force among soil particles is reduced, which in turn enhances the attraction force of the clay layers. This process strengthens the connection among the soil particles and thus increases the strength of the soil as detected by the experimental tests.

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“…Thompson [23] described lime-reactive soils that show a significant increase in strength over time as reactive and those showing limited pozzolanic reactivity as non-reactive. Yuan et al [24] assessed the same lime and cement additions as improving agents of specific fine-grained soils-red clay. They found that the dynamic resilient modulus of red clay stabilised with cement is slightly higher in comparison to that with lime.…”

Section: Introductionmentioning

confidence: 99%

Resilient Response of Cement-Treated Coarse Post-Glacial Soil to Cyclic Load

2021

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Stabilisation with cement is an effective way to increase the stiffness of base and subbase layers and to improve the rutting of subgrade. The aim of the study is to investigate the effect of different percentages of cement additives (1.5%, 3.0%, 4.5% and 6.0%) on the resilient modulus of coarse-grained soil used on road foundations. The influence of the compaction method, the standard Proctor and the modified Proctor, as well as the sample curing time is analysed. The cement addition significantly increases the resilient modulus and reduces the resilient axial strain. Extending the curing time from 7 to 28 days also improves the resilient modulus. The change in the compaction energy from standard to modified does not increase the resilient modulus of the stabilised gravelly sand due to its compaction characteristics. The test results of the resilient modulus of the gravelly sand stabilised with cement indicate the possibility of using it as a material for the road base and subbase due to meeting the AASHTO requirements. However, the non-stabilised gravelly sand does not meet the above requirements. It has been sheared during cyclic tests at the first load sequence, regardless of the compaction method.

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Resilient Modulus—Physical Parameters Relationship of Improved Red Clay by Dynamic Tri-Axial Test

Cited by 16 publications

References 60 publications

Precise evaluation method for the stability analysis of multi-scale slopes

Precise evaluation method for the stability analysis of multi-scale slopes

Optimization of Ionic Soil Stabilizer Dilution and Understanding the Mechanism in Red Clay Treatment

Resilient Response of Cement-Treated Coarse Post-Glacial Soil to Cyclic Load

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