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Título
Analysis of the deformational behavior of a clayey foundation soil stabilized with ladle furnace slag (LFS) using a finite element software
Autor
Publicado en
Materials Today: Proceedings. 2023
Editorial
Elsevier
Fecha de publicación
2023-04
ISSN
2214-7853
DOI
10.1016/j.matpr.2023.03.721
Descripción
Comunicación oral presentada en: Second International Conference on Construction Materials and Structures ICCMS-2022, durante los días 13-19 de diciembre en India, de forma online.
Resumen
The stabilization of soft clayey soils to improve their stress–strain behavior is one of the most widely used geotechnical engineering techniques. Traditionally, lime and cement have been used as stabilizers, although other products such as Ladle Furnace Slag (LFS) are now used, given the environmental imperative to reuse materials and to reduce both the consumption of raw materials and the use of landfill sites. LFS is a by-product of the steelmaking industry, with limited applicability in other industrial processes, but its chemical composition, rich in calcium, magnesium, silica, and alumina, mean that it may be used as a binder for clayey soils as a substitute for lime. This geo-mechanical research is focused on the analysis of the plastic behavior and the strength of a low bearing capacity clayey soil mix with 5% added LFS. The following properties were evaluated: plasticity (Atterberg limits), California Bearing Ratio (CBR), Unconfined Compression Strength (UCS), and direct shear strength. The evolution of UCS was verified through tests on samples held in a humid chamber at a constant relative humidity of 95% ± 5%. and temperature of 20 °C ± 3 °C, after 3, 7, 28, 54, and 90 days of curing. Based on the results, a numerical analysis was performed with a two-dimensional finite element software: RS2 (Rocscience). The behavior of a footing-foundation system supported on stabilized soil was modeled, with a plate load test geometry and with the laboratory parameters. The results, compared with those obtained with untreated soil and with a lime-stabilized soil, demonstrated that the LFS mix increased the stiffness of the layered soil (less settlement) and improved its bearing capacity. The applicability of LFS for soil stabilization and its use in geotechnical works such as foundations and embankments open up fields of application that are likely to offer satisfactory alternatives for these by-products.
Palabras clave
Bearing capacity
Ladle furnace slag
Finite element analysis
Settlement
Soil stabilization
Materia
Materiales de construcción
Building materials
Hormigón-Ensayos
Concrete-Testing
Versión del editor
Aparece en las colecciones
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