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Query: "keywords" (PE-based recycled material) .

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1.
Validation of the recycled backfill material for the landslide stabilization at a railway line
Karmen Fifer Bizjak, Barbara Likar, 2024, original scientific article

Abstract: In mountain areas landslides many times endanger safety of transport infrastructures, and these must be stabilized with retaining wall structures. In this paper the validation of a new composite as a backfill material for landslide stabilization with a large scale demo retaining wall is presented. The new composite was made from residues of paper industry, which uses for its production deinking process. New composite was validated with the laboratory tests, construction of small demo sites and at the end with a large demo retaining wall structure with a length of 50 m. It was concluded that the paper sludge ash and the paper sludge are in proportion 70:30, compacted on the optimal water content and maximum dry density, reached sufficient uniaxial compressive and shear strength. However, the composite's hydration processes required the definition of an optimal time between the composite mixing and installation. In 2019, the retaining wall structure from the new composite was successfully built. The large demo structure is an example of the knowledge transfer from the laboratory to the construction site, in which composite and installing technology could be verified.
Keywords: landslides, recycled backfill material, paper sludge ash, geotechnical composite, railway line, recycled material, environment
Published in DiRROS: 26.03.2024; Views: 117; Downloads: 87
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2.
Dynamic properties of lightweight foamed glass and their effect on railway vibration
Stanislav Lenart, Amir M. Kaynia, 2019, original scientific article

Abstract: Deformation properties of lightweight coarse grained material from recycled foamed glass have been determined from large-scale triaxial tests on prismatic specimens with dimensions 40 cm x 40 cm x 80 cm. Deformations were measured locally using vertical and horizontal local deformation transducers. Monotonic and cyclic loading at small to medium strain range were conducted. Three load sequences representing the expected conditions of use of lightweight material as vibration-reducing material in railway geotechnics have been used. Results indicate strong effect of brittle cellular structure of tested material as well as confining pressure dependency of elastic threshold shear strain and damping ratio. The results were used to assess the applicability of empirical formulas for shear modulus of granular materials to lightweight foamed glass. The parameters determined from the laboratory tests were further used in numerical analysis of railway dynamic response. The results of the numerical simulations show that replacement of fill in track embankment by lightweight material could improve the dynamic response of the track in reducing the vibration.
Keywords: lightweight material, recycled foamed glass, railway vibration, shear modulus, damping
Published in DiRROS: 16.11.2023; Views: 297; Downloads: 231
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