Properties of Steel Slag and Stainless Steel Slag as Cement Replacement Materials: A Comparative Study

Fathy, Saly; Guo, Liping; Ma, Rui; Gu, Chengfan; Sun, Wei

doi:10.1007/s11595-018-1989-3

Cited by 34 publications

(28 citation statements)

References 14 publications

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“…There are two different types of electric arc furnace slag, depending on the type of steel produced:  EAF-C: electric arc furnace slag from carbon steel production;  EAF-S: electric arc furnace slag from stainless/high alloy steel production. From XRD and XRF analyses, BOF slag is mainly characterized by the following mineralogical phases (depending on their basicity/alkalinity (CaO/SiO 2 ): 0.9-2.7 (low hydraulic reactivity), >2.7 (high hydraulic reactivity) [32]): belite (C 2 S), alite (C 3 S), RO phase (i.e., a solid solution of CaO-FeO-MnO-MgO), dicalcium ferrite (C 2 F), gehlenite (Ca 2 Al(AlSi)O 7 ), olivina (Mg,Fe) 2 SiO 4 ), and merwinite (Ca 3 Mg(SiO 4 ) 2 ) [27,31,32,35,[37][38][39].…”

Section: Electric Arc Furnace Slag (Eaf)mentioning

confidence: 99%

“… CaO (43.22%), SiO2 (27.82%), Fe2O3 (7.54%), Al2O3 (2.74%), MgO (7.35%), MnO (0.68%), SO3 (1.73%), TiO2 (0.59%), P2O5 (0.45%), Cr2O5 (0.95%), free CaO (0.58%) [32];  CaO (15-25%), SiO2 (5-25%), FeOx (30-50%), Al2O3 (1-3%), MgO (1-3%), Cr2O3 (5-30%) [62] (slag from alloy steel production (indicated with the letter "B" in the reference article));  CaO (20-50%), SiO2 (10-40%), FeOx (5-30%), Al2O3 (5-15%), MgO (5-15%), Cr2O3 (0.5-5%) [62] (slag from special steel production (indicated with the letter "C" in the reference article));  CaO (56.90%), SiO2 (23.00%), Fe2O3 (1.41%), Al2O3 (5.27%), MgO (6.23%), MnO (1.68%), TiO2 (1.50%), P2O5 (0.10%), Cr2O3 (2.96%) [10].…”

Section: Electric Arc Furnace Slag (Eaf)mentioning

confidence: 99%

“…From XRD and XRF analyses, EAF slags are characterized by the following mineralogical phases (depending on their basicity/alkalinity (CaO/SiO2): 0.9-2.7 (low hydraulic reactivity), >2.7 (high hydraulic reactivity) [32]): wustite (solid solution of FeO), brownmillerite (Ca2(Al,Fe)2O5), mayenite (C12A14O33), belite (C2S), alite (C3S), RO phase (i.e., a solid solution of CaO-FeO-MnO-MgO), ferrite (C4AF), gehlenite (Ca2Al(AlSi)O7), olivina (Mg,Fe)2SiO4), merwinite (Ca3Mg(SiO4)2), and calcium silicate (β-Ca2SiO4) [32,39,43,45,46,48,49,55,61].…”

Section: Electric Arc Furnace Slag (Eaf)mentioning

confidence: 99%

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Use of Iron and Steel Slags in Concrete: State of the Art and Future Perspectives

et al. 2021

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In the two last decades, world production of pig iron and steel has undergone a significant increase. In 2018, 1252.87 and 1806.46 million tons of pig iron and steel, respectively, were produced as compared to the 575.78 and 809.94 million tons of 2000. Consequently, the amount of the different types of slags deriving from these production processes has also increased considerably. In relation to the principles of sustainability and circular economy, the available literature suggests several possible reuses for these slags (bituminous conglomerates, hydraulic engineering, metallurgy, fertilizers, etc.). This paper aims to provide an overview of the iron and steel slags production and their reuse in concrete (for example as replacement of cement, fine or coarse aggregates). The characteristics of slags are analyzed in terms of chemical, physical, and mechanical properties. Mechanical and durability tests (both from material and structures point of view) carried out in the different studies and research are shown as well. Particular attention was devoted to electric arc furnace slags (EAF) since they are the most produced in Italy. Based on this deep literature review, the gaps that still require further studies have been identified and discussed.

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Section: Electric Arc Furnace Slag (Eaf)mentioning

confidence: 99%

Section: Electric Arc Furnace Slag (Eaf)mentioning

confidence: 99%

Section: Electric Arc Furnace Slag (Eaf)mentioning

confidence: 99%

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Use of Iron and Steel Slags in Concrete: State of the Art and Future Perspectives

et al. 2021

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“…Furthermore, besides the CO 2 emissions, a substantial amount of metallurgical slag is generated during iron and steelmaking processes. Steelmaking slag (SS) is mainly used in road construction and cement industries in many countries due to its similar composition to Portland cement (Gedam et al, 2012;Saly et al, 2018). However, some SSs can release large amounts of toxic metals (e.g., Cr) affecting their utilization (Huiting and Forssberg, 2003).…”

Section: Introductionmentioning

confidence: 99%

Co-treatment of Waste From Steelmaking Processes: Steel Slag-Based Carbon Capture and Storage by Mineralization

et al. 2020

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The iron and steel industry is an energy-intensive sector, and large amounts of waste/ by-products are generated during the steelmaking process, such as CO 2 , metallurgical slag, and wastewater. Enhancing the development and deployment of treating waste from the steelmaking process will be environment friendly and resource-saving. Capturing CO 2 by steel slag (SS) via mineralization is regarded to be an excellent choice due to the high basicity of the slag. In this paper, recent research on the steel slag-based carbon capture and storage (SS-CCS) by mineralization was summarized. Three routes of SS-CCS are compared including, direct gas-solid carbonation, direct aqueous carbonation, and indirect carbonation, respectively. Furthermore, the challenges and prospects for further development of the SS-CCS were discussed.

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“…Slag-based cementitious materials generally have the advantages of corrosion resistance and high post-strength and can also solve the problems of expansion, strength reduction, and even disintegration of high-sulfur tailing aggregate filling body [14][15][16][17][18][19][20][21]. Geopolymer cementitious materials have a "crystal-like" structure consisting of circular molecular chains, which can segment metal ions and other toxic substances into cavities and which is one of the effective methods for toxic and nuclear waste treatment [22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Mechanical Properties of Cemented Uranium Tailing Backfill Based on Alkali‐Activated Slag

Wang

Chen

et al. 2020

Advances in Materials Science and Engineering

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Backfilling disposal based on cement solidification is one of the ways to solve the environmental and safe problems of uranium tailing surface stacking. Alkali-activated slag, especially sodium silicate activated geopolymer, has become the preferred cementing material for the uranium tailing backfilling system because of its advantages of corrosion resistance and high strength. In this paper, uranium tailings and slag are taken as research objects, and the unconfined compressive strength (UCS) is taken as the main quality index. The preparation method of the cemented uranium tailing backfill based on alkali-activated slag was studied, hereinafter referred to as CUTB. The effects of additive amount, activator amount and activator modulus on the strength of CUTB were investigated. The results show that alkali-activated slag is an effective cementing material for the backfilling system of uranium tailing aggregate. The maximum UCS of 28 d age in the test groups is 16.45 MPa. Quicklime is an important additive for preparing CUTB. When the amount of quicklime is 0%, the early and late strengths of the filling body cannot be measured or at a very low level. At the age of 7 d, the order of each factor is additive amount > activator modulus > activator amount, but at the age of 28 d, the order of each factor is additive amount > activator amount > activator modulus. The test results can provide a basis for choosing cementitious materials for backfilling disposal of uranium tailings.

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Properties of Steel Slag and Stainless Steel Slag as Cement Replacement Materials: A Comparative Study

Cited by 34 publications

References 14 publications

Use of Iron and Steel Slags in Concrete: State of the Art and Future Perspectives

Use of Iron and Steel Slags in Concrete: State of the Art and Future Perspectives

Co-treatment of Waste From Steelmaking Processes: Steel Slag-Based Carbon Capture and Storage by Mineralization

Preparation and Mechanical Properties of Cemented Uranium Tailing Backfill Based on Alkali‐Activated Slag

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