Characterization of Moroccan steel slag waste: The potential green resource for ceramic production

Rahou, Jihad; Rezqi, Halima; Ouahabi, Meriam El; Fagel, Nathalie

doi:10.1016/j.conbuildmat.2021.125663

Cited by 20 publications

(3 citation statements)

References 38 publications

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“…The Fe in steel slag is in the form of steel, FeO, and iron-bearing minerals. A lot of researchers indicate that the chemical and mineral compositions of steel slag are similar to Portland cement clinker, containing large amounts of cementitious minerals, such as C 2 S, C 3 S, and C 4 AF, which makes it potentially useful in cementitious materials [6,7]. Besides the promising application in the cement and concrete field, steel slag has also been used in road aggregates [8][9][10], carbonized minerals [11][12][13][14], fluxing agents [15][16][17], fertilizer [18], and ceramics making [19,20] due to its hard and wear resistance, higher iron content, and CO 2 reactive characteristics, etc.…”

Section: Introductionmentioning

confidence: 99%

Effects of Steel Slag on the Hydration Process of Solid Waste-Based Cementitious Materials

Ren,

Wang,

Duan

et al. 2024

Materials

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Aiming to enhance the comprehensive utilization of steel slag (SS), a solid waste-based binder consisting of SS, granulated blast furnace slag (BFS), and desulfurization gypsum (DG) was designed and prepared. This study investigated the reaction kinetics, phase assemblages, and microstructures of the prepared solid waste-based cementitious materials with various contents of SS through hydration heat, XRD, FT-IR, SEM, TG-DSC, and MIP methods. The synergistic reaction mechanism between SS and the other two wastes (BFS and DG) is revealed. The results show that increasing SS content in the solid waste-based binder raises the pH value of the freshly prepared pastes, advances the main hydration reaction, and shortens the setting time. With the optimal SS content of 20%, the best mechanical properties are achieved, with compressive strengths of 19.2 MPa at 3 d and 58.4 MPa at 28 d, respectively. However, as the SS content continues to increase beyond 20%, the hydration process of the prepared binder is delayed. The synergistic activation effects between SS and BFS with DG enable a large amount of ettringite (AFt) formation, guaranteeing early strength development. As the reaction progresses, more reaction products CSH and Aft are precipitated. They are interlacing and overlapping, jointly refining and densifying the material’s microstructure and contributing to the long-term strength gain. This study provides a reference for designing and developing solid waste-based binders and deepens the insightful understanding of the hydration mechanism of the solid waste-based binder.

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Section: Introductionmentioning

confidence: 99%

Effects of Steel Slag on the Hydration Process of Solid Waste-Based Cementitious Materials

Ren,

Wang,

Duan

et al. 2024

Materials

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“…In recent years, scholars have discovered that steel slag is predominantly composed of silicate minerals and solid solutions formed by bivalent metal oxides such as FeO, MgO, and MnO, while waste clay brick primarily consists of quartz and andesine. Based on their compositional characteristics, these materials can be used to manufacture ceramic products [33]. However, the traditional SiO 2 -Al 2 O 3 -K 2 O system may not be suitable for steel slag ceramics because it requires limited amounts of Fe 2 O 3 and CaO (the Fe 2 O 3 content must be less than 0.8 wt.% and the CaO content must be less than 3 wt.%).…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance of Ceramic Tiles with Steel Slag and Waste Clay Bricks

Ji,

Li,

Zhu

et al. 2024

Materials

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Steel slag and waste clay bricks are two prevalent solid waste materials generated during industrial production. The complex chemical compositions of these materials present challenges to their utilization in conventional alumina silicate ceramics manufacturing. A new type of ceramic tile, which utilizes steel slag and waste clay brick as raw materials, has been successfully developed in order to effectively utilize these solid wastes. The optimal composition of the ceramic material was determined through orthogonal experimentation, during which the effects of the sample molding pressure, the soaking time, and the sintering temperature on the ceramic properties were studied. The results show that the optimal ceramic tile formula was 45% steel slag, 35% waste clay bricks, and 25% talc. The optimal process parameters for this composition included a molding pressure of 25 MPa, a sintering temperature of 1190 °C, and a soaking time of 60 min. The prepared ceramic tile samples had compositions in which solid waste accounted for more than 76% of the total material. Additionally, they possessed a modulus of rupture of more than 73.2 MPa and a corresponding water absorption rate of less than 0.05%.

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“…Steel slag is one such by-product obtained from steel-making industries. Several studies highlighted the utilization of steel slag in ceramic production (Rahou et al, 2022), railway ballast (Delgado et al, 2019;Esmaeili et al, 2020;Jing et al, 2020), highway sub-base (Wu et al, 2019), aggregates (Shi, 2004) and concrete production (Qasrawi et al, 2009;Wang et al (2013). On the other hand, current infrastructural development is resulting in an increase in CDW production.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of reinforced earth walls with sustainable backfills subjected to railway loading

Mandloi

Hegde²

2022

Front. Built Environ.

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The concept of using Reinforced Earth (RE) walls for rail corridors is gaining popularity. As of now, very few nations have successfully adopted the RE walls for Railway infrastructure. These structures require good quality granular materials like sand for backfilling. However, due to the scarcity of good quality natural sand, research efforts are being made to look for cost effective alternatives to sand in backfill applications. The present study examines the possibilities of using the two sustainable materials, namely steel slag and construction and demolition waste (CDW), as backfills in RE walls subjected to harmonic train-induced load. In total, 63 separate full-scale numerical models of RE walls have been analyzed to understand the wall behavior with sustainable backfills subjected to different train speeds. The backfill materials were simulated with three different material models, namely, linear elastic, Mohr-Coulomb and Hardening Soil, for comparison. The results showed that the RE wall behavior is highly frequency-dependent. RE walls with steel slag and CDW backfills have shown 25% and 12% lesser deformations, respectively as compared to the sand backfill. Furthermore, reinforcement tensile forces in walls with sustainable backfills were found to be comparable to those of sand. The maximum deformation of the wall was observed when the fill materials were simulated with the Hardening Soil model. In overall, satisfactory performance of the RE wall was observed in the presence of sustainable backfill materials under Railway loading.

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Characterization of Moroccan steel slag waste: The potential green resource for ceramic production

Cited by 20 publications

References 38 publications

Effects of Steel Slag on the Hydration Process of Solid Waste-Based Cementitious Materials

Effects of Steel Slag on the Hydration Process of Solid Waste-Based Cementitious Materials

Preparation and Performance of Ceramic Tiles with Steel Slag and Waste Clay Bricks

Performance evaluation of reinforced earth walls with sustainable backfills subjected to railway loading

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