Thus, granular steel slag and glass powder can effectively be used as cement and sand replacement in the production of value-added green economical concrete, reducing environmental pollution.
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Improving process design in steelmaking. D. Sichen, in Fundamentals of Metallurgy, 2005 9.5.1 Slag–metal mixing. In steelmaking, slag–metal mixing is a very common phenomenon and it occurs due to the shear at the slag–metal interface caused by excessive liquid steel flow. 37 This mixing leads to emulsification of steel in slag, which …
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The workability and durability of a type of sustainable concrete made with steel slag powder were investigated. The hydrated products of cement paste with ground granulated blast furnace slag (GGBFS) alone or with a combined admixture of GGBFS-steel slag powder were investigated by X-ray diffraction (XRD). Furthermore, the …
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Steel slag particles can potentially be used as aggregates in concrete production. However, the volume stability of steel slag is poor, and the direct use of …
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Microbial mineralization increases the CO 2 fixation of steel slag powder to 11.25%. When the mineralized steel slag powder is used as SCM, the sustainable efficiency of the mixed binder reaches 0.0384 MPa/(kg/m 3), which is 27.15% higher than that of pure cement. This technical route is conducive to carbon neutralization and …
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During steel production, the impurities in the hot metal react with the fluxes forming the steel slag. Chemical constituents of this steel slag (SS) are relevant to iron/steelmaking or blended cement manufacture. Harmful impurities present in it, however, limit its recycling to these applications. Japan, Europe, and the US consume a significant …
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Steel slag is a byproduct from either the conversion of iron to steel in a basic oxygen furnace, or the melting of scrap to make steel in an electric arc furnace. This paper reviews the production, processing, and characteristics of steel slag, and its use as a cementing component in different cementing systems.
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LF steel slag is the solid waste produced by the secondary refining of BOF and EAF steel. About 10–50 kg of LF steel slag is discharged for each ton of crude steel refined [11,27–29]. Simultaneously, LF steel slag appears as a loose powder, which is more suitable for utilization as a supplementary cementitious material than the aggregate ...
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128 Accesses. Explore all metrics. Abstract. Steel slag powder and construction waste have received widespread attention for their resource utilization as …
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The two primary methods employed in steel production are the basic oxygen furnace (BOF) process and the electric arc furnace (EAF) process [9]. Among the total steel slag generated, the majority is attributed to the BOF steel slag. ... When Steel Slag Powder (SSP) is incorporated as an SCM in concrete, there is a tendency to improve the ...
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Steel slag production is estimated as 10–15% of crude steel production [17]. According to World Steel Association (Worldsteel) data, 15.7 million tons of steel …
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Schematic diagram of steel slag production and disposal routes. ... Shen et al. (2020) used carbonated steel slag powder as cementitious material, crushed steel slag as aggregate and phosphogypsum as an additive to prepare pervious concrete. The compressive strength of the prepared pervious concrete reached 9.4 MPa, which had a …
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The applications of steel slag powder and steel slag aggregate in ultra-high performance concrete (UHPC) were investigated by determining the fluidity, nonevaporable water …
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In the construction industry, waste steel slag is usually used in cement concrete (Aparicio et al., 2020; Chen et al ... 2018). As an industrial waste, steel slag powder (SSP) has high output and large storage capacity, which can be applied in highway engineering asphalt mixture fillers and hence can provide a good and sustainable …
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However, when steel slag powder accounts for over 30% of the cementitious material, ... It is also important to mention that the poor grindability of steel slag renders the production of fine powder from it both costly and energy-intensive [20], [21]. Therefore, the application of steel slag powder in cement concrete as a …
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On the other hand, glass wastes and steel slag (SS) are given less attention to reuse in the application of construction purposes. The laboratory-based investigation for the partial replacement of cement and coarse aggregate with waste glass powder (WGP) and steel slag, respectively, in concrete production.
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Steel slags have a chemical composition close to that of the Portland cement clinker, mainly constituted by calcium-silicates and calcium-ferrites, which makes this industrial waste potentially usable as a raw material for cement and concrete production [91].The presence of steel slag in the clinker manufacturing process reduces the …
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On this basis, steel slag and slag composite micro powder (SSCM) technology was proposed, which realized the high added value and utilization rate of steel slag in industrial applications. ... As a by-product of the steelmaking industry, the large-volume production and accumulation of steel converter slag cause environmental …
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The production of 1 ton of steel produces approximately 100 kg of steel slag [8]. Steel slag contains free CaO and MgO, ... Extraction of calcium ions from steel slag. Steel slag powder of 10 g was added into a 50 mL beaker containing 280 g/L of NH 4 Cl (20 mL) or HAc (20 mL). The solution was stirred for 5 min and then left still for 24 h.
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1. Introduction. Steel slag is an industrial by-product arisen from the steel manufacturing process, the amount of which is estimated to be about 12–20% of total steel production [1, 2].In 2022, statistics show that 1.013 billion tons of steel were manufactured in China in which approximately 0.162 billion tons of steel slag was produced.
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Request PDF | Bacteria fixing CO2 to enhance the volume stability of ground steel slag powder as a component of cement-based materials aiming at clean production | Steel slag is a by-product in ...
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In this paper, steel slag ultrafine powder (SSUP) was prepared in the laboratory through mechanical activation combined with grinding aids. Furthermore, the …
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Asia alone contributes to 60% of steel slag production. It is estimated that steel slag produced by VISL, DSP and BSP plants in India produces 8 Mt of steel slag and the price of granulated slag at the cement factory was in the range of INR 450–856 for the financial year 2014–2015. India exports its slag to countries like China, Philippines ...
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Steel slag could be valuable for promoting a sustainable relationship between the concrete and steel industries. C 2 S, C 3 S, C 4 AF, and C 3 A in steel slags are typical mineral phases of Portland cement, indicating the potential of steel slags to function as hydraulic materials. Therefore, one recycling option is to grind steel slags …
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Steel slag is generally regarded as a supplementary cementitious material in cement-based materials, which is conducive to the realization of the goal of carbon peak and carbon neutralization. However, the lower cementitious activity and poorer volume stability of steel slag limit its high dosage in cement-based materials. In this paper, steel slag ultrafine …
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2.1. Materials. The seashell and steel slag, as shown in Fig. 1 (a) and (b), were obtained from Lagos beach and Top steel, Lagos. The seashell and steel slag were air-dried and pulverized with an abrasion machine at 1000 rev/min for 1 h at the Highway and Transportation Engineering Laboratory of Covenant University.
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The chemically activated steel slag powder could improve compressive strengths, resistance to chloride permeation and water permeation, as well as …
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The applications of steel slag powder and steel slag aggregate in ultra-high performance concrete (UHPC) were investigated by determining the fluidity, nonevaporable water content, and pore structure of paste and the compressive strength of concrete and by observing the morphologies of hardened paste and the concrete …
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In order to reveal the self-cementitious property of steel slag, the hydration and hardening characteristics of steel slag powder blended with 5 wt% gypsum were investigated from hydration heat, non-evaporable water (W n) and Ca(OH) 2 contents, hydration products, strength and so on. The results show that the hydration process of …
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