Cyclic and Post-Cyclic Shear Behaviour of Interface between Geogrid and EPS Beads-Sand Backfill

Alaie, Reza; Chenari, Reza Jamshidi

doi:10.1007/s12205-018-0945-2

Cited by 50 publications

(8 citation statements)

References 43 publications

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“…The mathematical–statistical method of least squares was used to evaluate the data, the aim of which is to approximate pairs of measured data. This knowledge was the basis for carrying out the experimental part of this work as well as for the evaluation of the results [ 32 , 33 , 34 , 35 ].…”

Section: Discussionmentioning

confidence: 99%

Identification of Hybrid Polymer Material STERED and Basic Material Properties Used in Road Substructures or Pavements

Papán,

Decký,

Ďugel

et al. 2024

Polymers

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Modern road construction uses a large number of polymer-based materials. Material composition depends on their roles. Among the most important functions of road body materials is to transfer all loads safely to the subgrade. A thorough understanding of material properties in various climates is crucial for this purpose. In the automotive industry, polymer residues from recycling can be used to make innovative materials, such as STERED, a hybrid polymer composite. Drawing on the porous nature of this material, this paper investigates its mechanical behavior. For road construction, the compressive properties of the material are most important. The paper presents the results of a detailed analysis and experimental research of the STERED material from in-lab tests. Successful research will lead to the inclusion of the material in road body compositions with excellent retention properties, vibration damping, and potential in circular economy.

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Section: Discussionmentioning

confidence: 99%

Identification of Hybrid Polymer Material STERED and Basic Material Properties Used in Road Substructures or Pavements

Papán,

Decký,

Ďugel

et al. 2024

Polymers

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“…This suggests that the geogrid is not deformed under low normal stress, resulting in relatively low interfacial energy dissipation. However, under high normal stress, the geogrid is deformed, leading to an acceleration in interfacial energy dissipation [31].…”

Section: Effect Of the Normal Stressmentioning

confidence: 99%

Experimental Study on Cyclic Shear Performance of the Four-Way Geogrid Reinforcement–Soil Interface

Zhang,

Ruan,

Jiang

2024

Applied Sciences

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This paper presents the results of horizontal cyclic direct shear tests at the reinforced soil interface of a four-way polypropylene geogrid reinforced sandy soil. The influence of normal stress and shear displacement amplitude on the shear stress, shear stiffness, and damping ratio of the reinforced soil interface are evaluated by varying the normal stress and shear displacement amplitude. Dynamic shear characteristics of reinforced soil interface under normal constant load were investigated by using a large dynamic straight shear apparatus. Peak interface strength increases with increasing amplitude of normal stress and shear displacement amplitude. The larger the normal stress and shear displacement amplitude, the fewer cycles are needed to attain peak interface strength. At low-magnitude normal stress levels, the peak shear stress and shear stiffness tend to stabilize after an initial increase during the cycling process, and the damping ratio decreases and then stabilizes with the increase in the number of cycles; whereas when the normal stress level is high, the peak shear stress and shear stiffness increase and then decrease during the cycling process and eventually stabilize, and the damping ratio decreases and then increases and finally stabilizes with the increase in the number of cycles. Moreover, under the same number of cycles, the corresponding shear stiffness decreases with an increase in shear displacement amplitude, while the damping ratio increases.

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“…Through resonant column and cyclic triaxial tests on sand-EPS bead mixtures, El-Sherbiny et al [16] discovered that the material damping is relatively unaffected at small shear strains but it increases at larger strains, and the decrease in shear stiffness with increasing bead content occurs at all strain levels. Moreover, Alaie et al [17] carried out a series of laboratory tests to evaluate the monotonic, cyclic, and post-cyclic behavior of the contact interface between lightweight soil and reinforced geogrid. Nonetheless, the road performance of the lightweight fill, especially the mechanical behavior under complex loading conditions as well as the difference with different natural soils is still not clear.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Deformation and Damping of Cement Treated and Expanded Polystyrene Mixed Lightweight Subgrade Fill under Cyclic Load

et al. 2019

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To investigate the deformation and damping characteristics of cement treated and expanded polystyrene (EPS) beads mixed lightweight soils, this study conducted a series of triaxial shear tests cyclic loading for different confining pressures, cement contents, and soil categories. Through repeated loading and unloading cycles, axial accumulative strain, resilient modulus, and damping ratio versus axial total strain were analyzed and the mechanical behavior was revealed and interpreted. Results show that the resilient modulus increases with increasing confining pressure and cement content. A decreasing power function can be used to fit the relationship between the resilient modulus and the axial total strain. Although sandy lightweight specimens usually own higher resilient modulus than silty clay lightweight specimens do, the opposite was also found when the axial total strain is larger than 8% with 50 kPa confining pressure and 14% cement content. For damping ratio the EPS beads mixed lightweight soil yields a weak growth trend with increasing axial total strain and a small reduction with higher confining pressure and cement content. For more cementations, the damping ratio of the sandy lightweight soil is always smaller than the silty clay lightweight soil. Nonetheless, the differences of damping ratios that were obtained under all of the test conditions are not significant.

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Cyclic and Post-Cyclic Shear Behaviour of Interface between Geogrid and EPS Beads-Sand Backfill

Cited by 50 publications

References 43 publications

Identification of Hybrid Polymer Material STERED and Basic Material Properties Used in Road Substructures or Pavements

Identification of Hybrid Polymer Material STERED and Basic Material Properties Used in Road Substructures or Pavements

Experimental Study on Cyclic Shear Performance of the Four-Way Geogrid Reinforcement–Soil Interface

Characteristics of Deformation and Damping of Cement Treated and Expanded Polystyrene Mixed Lightweight Subgrade Fill under Cyclic Load

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