Stabilisation of clayey and sandy soils with ladle furnace slag fines for road construction

Lopes, Emerson Cordeiro; Silva, Taciano Oliveira da; Pitanga, Heraldo Nunes; Pedroti, Leonardo Gonçalves; Carvalho, José Maria Franco de; Nalon, Gustavo Henrique; Lima, Gustavo Emílio Soares de; Araújo, Eduardo Nery Duarte de

doi:10.1080/14680629.2021.2017328

Cited by 9 publications

(1 citation statement)

References 59 publications

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“…Replacing free lime used in soil stabilization with LF slag has many benefits from both economic and environmental points of view. Some lead to very high-quality products, and some may result in low-quality products depending on the mineral and chemical composition of LF slag and the clay soil [112,113]. Several studies used LF slag and EAF slag for stabilization with a low success rate.…”

Section: Soil Rejuvenationmentioning

confidence: 99%

Ladle Furnace Slag: Synthesis, Properties, and Applications

Jacob

2023

ChemBioEng Reviews

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Ladle slag is a byproduct formed during the ladle refining stage of steel making. It is a dusty material that has been considered industrial waste. Technical advancements towards a sustainable industry led to the development of different applications for ladle slag. Depending on the processing methods during the steel slag production and the weathering of the slag post‐production, the elemental composition of the steel slag largely varies. Owing to this, its characteristics cannot be generalized and specific applications depending on the sources are developed. It is generally used in construction materials, soil rejuvenation, and CO2 capture. This paper reviews the production process, the mineralogical and morphological properties, stabilization techniques, and the applications of ladle furnace (LF) slag. One of the prime focuses of waste remediation and sustainable industry is to find meaningful ways to turn waste into products. In this respect, a comprehensive review of the properties of LF slag and its current application will help provide a framework for the development of future sustainability goals. With increased slag usage, the ladle refining process of steelmaking can be turned into a more carbon‐neutral process.

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Section: Soil Rejuvenationmentioning

confidence: 99%

Ladle Furnace Slag: Synthesis, Properties, and Applications

Jacob

2023

ChemBioEng Reviews

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Strength performance of low-bearing-capacity clayey soils stabilized with ladle furnace slag

Espinosa,

Revilla-Cuesta,

Skaf

et al. 2023

Environ Sci Pollut Res

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In this paper, the performance of ladle furnace slag (LFS), a by-product of secondary steel refining, is evaluated as a binder to stabilize clayey soils of low bearing capacity. The aim is to define whether additions of this by-product to clayey soil can stabilize the soil in accordance with the technical specifications of Spanish standards. To do so, three different soils stabilized with 5% LFS were compared with the same soils stabilized with 2% lime and with no stabilization, in order to investigate their different behaviors. The chemical and mineralogical characterizations of all the soil mixes were conducted using X-ray fluorescence, X-ray diffraction, and scanning electron microscopy. The Atterberg limit test was used to study the plastic behavior of the soils, and the results of compaction, bearing capacity, unconfined compressive strength, and direct shear strength (cohesion and friction angle) tests defined their strength characteristics. The analysis was completed with the pH monitoring of the mixes along the curing time in order to relate the pH changes with the strength evolution. The addition of LFS to the soils has resulted in an increase in the liquid limit and plastic limit, causing therefore a slight decrease in the plasticity index. All the soils showed increases between 30% and 70% in their California Bearing Ratios immediately after mixing with 5% LFS, and after 90 days of curing, improvements of 30–188% in their unconfined compressive strength were noted in comparison with untreated soil, which were higher than the lime-stabilized soils. The cohesion of soils stabilized with LFS at 28 days of curing obtained improvements ranging from 40 to 300% depending on the type of soil. However, the friction angle showed a slight increase of 10% in two of the soils and zero in another. The high initial pH in LFS-stabilized soils was maintained during the curing time, which favored the development of pozzolanic reactions that improve the soil strength. These results confirmed that the substitution of lime with LFS is a feasible option for soil stabilization.

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An investigation of nonmagnetic iron slag effect on engineering parameters of expansive soil and its statistical validation

Jangid,

Grover

2024

Multiscale and Multidiscip. Model. Exp. and Des.

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Stabilisation of clayey and sandy soils with ladle furnace slag fines for road construction

Cited by 9 publications

References 59 publications

Ladle Furnace Slag: Synthesis, Properties, and Applications

Ladle Furnace Slag: Synthesis, Properties, and Applications

Strength performance of low-bearing-capacity clayey soils stabilized with ladle furnace slag

An investigation of nonmagnetic iron slag effect on engineering parameters of expansive soil and its statistical validation

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