Environmental Issues and Recycling. The Improvement of Soft Clayey Soil Utilizing Reducing Slag Produced from Electric Arc Furnace.

Kanagawa, Atsushi; Kuwayama, Tadashi

doi:10.4262/denkiseiko.68.261

Cited by 19 publications

(6 citation statements)

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“…Researchers now face the task of finding the most efficient and appropriate techniques for their reuse [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Several investigations on the re-use of steelmaking slags have been published over the last decades; some of them concerning mortar and concrete (rigid-stiff matrices) , and mixtures with granular soils (compliant-flexible and porous matrices) [44][45][46][47][48][49][50][51][52][53][54][55][56][57][58].…”

Section: Introductionmentioning

confidence: 99%

Electric arc furnace slag and its use in hydraulic concrete

Arribas

Santamarı́a

Ruiz

et al. 2015

Construction and Building Materials

172

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Section: Introductionmentioning

confidence: 99%

Electric arc furnace slag and its use in hydraulic concrete

Arribas

Santamarı́a

Ruiz

et al. 2015

Construction and Building Materials

172

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“…Over recent years, greater ecological awareness in all of its social dimensions, the need to reduce the use of natural resources, and the economic opportunity of reusing potentially useful co-products for other industrial materials have prompted several investigations aimed at finding feasible and economically profitable applications of LFS, such as aggregate in the manufacture of structural mortars (Adolfsson et al 2011 ; Santamaría et al 2016 ; Rosales et al 2017 ), masonry mortars (Rodriguez et al 2009 ; Manso et al 2011 ), vibrated concrete (Papayianni and Anastasiou 2010 ; Polanco et al 2011 ) and self-compacting concrete (Anastasiou et al 2014 ), cement production (Richardson and Cabrera 2000 ; Akin Altun and Yilmaz 2002 ), soil stabilization (Kanagawa and Kuwayama 1997 ; Montenegro et al 2013 ), and environmental engineering (Herrmann et al 2010 ; Radenović et al 2013 ) and granular material for backfills (Maghool et al 2017a ).…”

Section: Introductionmentioning

confidence: 99%

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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“…The efforts of Materials Research Groups have for some years been persistently searching for an alternative use for LFS and EAFS (8−12). Traditionally, EAFS has been used as aggregate in the construction of bases and sub-bases for roadways (13) and in bituminous binders for roadways (14,15).…”

Section: Introductionmentioning

confidence: 99%

Study of the expansion of cement mortars manufactured with Ladle Furnace Slag LFS

Rodríguez¹,

Santamaría-Vicario²,

Carpintero³

et al. 2019

Mater. construcc.

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Industrial by-products generated in the steel manufacturing are successfully used as raw materials in the production of construction materials. However, steel slags, due to their nature and composition, can cause undesirable side-effects in mortars and concretes. The reactive components of LFS and EAFS can affect the stability of the cement matrix. This situation may be prevented by an adequate pre-treatment of slag stabilization and a study of the possible reactions within its mineralogical components, to ensure the stability of the slag over time. In this work, an experimental process is shown to evaluate the behaviour of LFS under adverse environmental conditions when used as aggregates in the manufacture of cement mortars for masonry, such as the presence of humidity, high temperatures (80°C) and possible alkali-silica and alkali-silicate reactions. The results show an acceptable behaviour under normal environmental conditions (20°C). However, the formation crystalline acicular structures were observed under high temperatures (80°C) and in the presence of humidity, which degraded the internal structure of the mortars manufactured with LFS.

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Environmental Issues and Recycling. The Improvement of Soft Clayey Soil Utilizing Reducing Slag Produced from Electric Arc Furnace.

Cited by 19 publications

References 0 publications

Electric arc furnace slag and its use in hydraulic concrete

Electric arc furnace slag and its use in hydraulic concrete

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

Study of the expansion of cement mortars manufactured with Ladle Furnace Slag LFS

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