Synergistic hydration mechanism of steel slag-metakaolin …

Steel slag (SS), as a solid waste from the bulk iron and steel metallurgical industry, is similar to cement clinker in terms of its main mineral components and chemical composition, which contains large amounts of silicate minerals (C 2 S, C 3 S) and small amounts of aluminates (C 3 A) and ferric aluminates (C 4 AF). These minerals confer hydration and reactivity to SS, …

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Effect of carbonation curing on the characterization and properties …

The iron and steel industry is an energy-intensive industry and a pillar industry of the national economy. Steel slag (SS) is an alkaline solid waste generated during the steelmaking process [1].Each ton of crude steel produced generates 0.1–0.15 tons of SS and emits 1.85 tons of CO 2 [2, 3].The iron and steel industry is not only one of the largest sources of industrial solid …

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Microscopic analysis of carbonated steel slag and its impact …

Steel slag (SS) is a solid waste produced during steel manufacture, taking about 15–20 % of global crude steel by mass [1].Based on statistic released by the World Steel Association, its amount could have reached over 280 million tons in 2023 [2].In regions, such as Europe and the United States, more than 80 % of SS has been properly reused, while in comparison for the …

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Steel Slag

Steel slag, a by-product of steel making, is produced during the separation of the molten steel from impurities in steel-making furnaces. The slag occurs as a molten liquid melt …

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An Overview on Utilization of Steel Slag as Road

The main u se for steel slag and air-cooled iron slag are as feed for cement kilns and as aggregates for asphaltic pave ment, fill, and road bases. Slag that has been air-cooled can also be ...

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Influence of fineness on the cementitious properties of steel slag

Hydration heat of steel slag. Figure 2 shows the exothermic rates during the hydration of the three steel slags with different finenesses. The exothermic process of steel slag is very similar to that of cement which can be divided into five stages: (1) short rapid exothermic stage at which the first exothermic peak forms; (2) dormant period at which the exothermic rate …

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Chemical, Mineralogical, and Morphological Properties …

discussed in the context of a detailed review of steel slag properties. 1.Introduction The steelmaking industries in the US generate 10–15 million tons of steel slag every year. Approximately 15 to 40% of ... nace since the main feed for it is steel scrap with some pig iron. Electric-arc furnaces are equipped with graphite elec- ...

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A Review on the Carbonation of Steel Slag: Properties, …

1. Introduction. Steel slag is a by-product generated during the steelmaking process, with a production rate of approximately 10–15% of the crude steel quantity [].Large amounts of steel slag have been produced annually in many regions [].As a major steel producer in the world, crude steel production in China reached 1.01 billion tons in 2022 while producing more than 160 …

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Effect of carbide slag and steel slag as alkali activators on …

The main reason for this is the low alkalinity of the system, which does not promote the hydration of potentially water-hardened solid wastes well. ... Kong C and Li X (2024) Effect of carbide slag and steel slag as alkali activators on the key properties of carbide slag-steel slag-slag-phosphogypsum composite cementitious materials. Front ...

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Aqueous carbonation of steel slags: A comparative study on …

The formation of distinct phases after carbonation in different steel slags depends on the diverse mineral compositions found in the slags [19].Generally, the main minerals with carbonation reactivity in steel slags include ƒ-CaO/MgO and their hydration products (e.g., calcium hydroxide), calcium silicates (e.g., C 3 S, β- and γ-C 2 S), and calcium aluminates …

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Effect of steel slag as alkaline exciter on the properties of

Steel slag is a byproduct of the steelmaking process, with most steel slag in China being converter slag, a material rich in CaO [6].The presence of C 2 S and C 3 S provides binding properties, making it a potential cementitious material [7].Research has identified the interaction mechanism between steel slag powder and Portland cement in the early hydration stage, …

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A Review on the Carbonation of Steel Slag: Properties, …

Steel slag is a by-product generated during the steelmaking process, with a production rate of approximately 10–15% of the crude steel quantity [1]. Large amounts of steel slag have been …

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Chemical, Mineralogical, and Morphological …

Steel slag is a byproduct of the steelmaking and steel refining processes. This paper provides an overview of the different types of steel slag that are generated from basic-oxygen-furnace (BOF) steelmaking, electric-arc …

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Review Accelerated carbonation of steel slag: A review of …

Steel slag is a by-product of the steel production process, accounting for approximately 15% of the whole crude steel output [1].The accumulation of untreated steel slag not only occupies a significant amount of land but also leads to the leaching of heavy metal ions (such as vanadium, chromium, arsenic, lead, cadmium), polluting surrounding water sources …

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Activation technology of steel slag for concrete exposed to …

Steel slag is a byproduct generated during the steelmaking process. As the largest steel producer in the world, China produces over 100 million tons of steel slag annually, accounting for approximately 15–20% of crude steel production (Rui et al. 2022, Shi et al. 2022).After steelmaking, the slag is placed in a slag heap and subjected to magnetic separation to recover …

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Steel Slag

Selected physical properties of steel slag are shown in Table 10.1. Depending on the used production technology, the steel slag ... Overlaid on these drawbacks, the presence of abundant free calcium oxide (f-CaO) and magnesium oxide (f-MgO) in steel slag is the main culprit of expansion and cracking in cement-based materials at a later ...

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Hydration properties of steel slag under autoclaved condition

Steel slag, a by-product from the steel-making process, is a potential mineral admixture for cement or concrete production [].C 3 S, C 2 S, C 4 AF, and C 2 F are common minerals in steel slag, which endow steel slag with cementitious properties [2, 3].The main hydration products of steel slag include C–S–H gel and Ca(OH) 2, which are very similar to …

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Research on the Properties of Steel Slag with Different …

This study compared the physical and chemical properties of steel slag produced by three different methods from four different steel mills. We compared the changes in mineral …

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Physical properties and chemical composition of …

Steel slag is an aggregate composed of various minerals and glassy substances. Due to different chemical components and cooling conditions, the appearance and color of steel slag vary greatly. The steel slag with lower …

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Physical Properties of Steel Slag | Download Table

The abrasion properties of steel slag concrete are comparable with a coarse aggregate concrete. ... maintaining the same mechanical properties of the as-cast slag. The main advantages of the new ...

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High-temperature modification and air-quenching granulation of steel slag

To solve the problem of difficult utilization of steel slag, the liquid steel slag was modified and the air-quenching granulation process was carried out to make steel slag into a value-added end product: air-quenching granulated steel slag. The granulated slag was tested to analyze the variation rule of slag properties under different modification conditions. Based on …

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Utilization of steel slag in air pollution and greenhouse gas …

Properties of steel slag2.1.1. Chemical composition. ... Yu Tongchuan et al. [7] studied the role of the main components in steel slag on the effect of desulfurization, and found that MgO and Fe 2 O 3 in steel slag have a promotional effect on desulfurization. In the same situation, the desulfurization effect of steel slag is significantly ...

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Application of Steel Slag as an Aggregate in Concrete …

Typical morphology of steel slag [].(a) BOF steel slag.(b) EAF steel slag.(c) LF steel slag.BOF steel slag is the solid waste produced in the converter steelmaking process, and its discharge is approximately 100–150 kg per ton of BOF steel [20,21,22,23].BOF steel slag commonly has a grayish-white appearance and a vesicular nature, with many non-interconnected pores [].

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Steel Slag—Its Production, Processing, Characteristics, and

Steel slag with high basicity and being cooled properly can exhibit cementing property. Ground steel slag has been used in several different cementing systems. The use of steel slag in these cementing systems results in some advantages over conventional cements. At the moment, most steel slag is being used as unbound aggregate for ashphalt ...

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Estimating the variability of steel slag properties and their …

These works show that not only do chemical and physical properties of steel slag impact its P removal ability, but also the nature of the interactions between P and the media, e.g., input P concentrations and residence time (RT). ... Phosphorus cumulative removal versus main variables of interest for uncoated slags: (a) Calcium content and (b ...

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CHEMISTRY, MINERALOGY AND MORPHOLOGY OF …

steel slag and stainless steel slag, In order to gain a ... hydraulic properties, steel and stainless steel slags are highly crystalline in nature due to its high basicity ... high alkalinity of steel slags itself is considered the main reason poses its hydraulic activity (8, 19 and 20).

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The positive contributions of steel slag in reducing carbon …

Steel slag is a by-product generated during the steelmaking process, constituting 15 to 20 % of crude steel production [3].Steel slag possesses significant sensible heat, carbon sequestration potential, and resource utilization capacity, all of which are crucial for reducing CO 2 emissions in the steel industry. Given its high heat content in the molten state, the release of …

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The adsorption properties of steel slag-based porous …

Steel slag, which is a solid waste containing silica-aluminate minerals, is a suitable raw material for the preparation of geopolymers. While there have been some studies on the preparation of geopolymers using steel slag as a main raw material, these studies have focused on small amounts of slag and do not exceed 50 % by weight.

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Research on the Properties of Steel Slag with …

Steel slag is a lumpy substance that combines the residual solvent and metal oxides in the steelmaking furnace after cooling, iron removal, crushing, etc. It is a by-product of the steelmaking process. Steel slag emissions make …

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Evaluation of mechanical and physical properties of steel slag …

In this study the physical, mechanical, visual, and morphological characterization of steel slag was conducted in view of the suitability of steel slag as an aggregate (SSA) in road construction. The obtained results showed that the SSA …

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Research on the Properties of Steel Slag with Different …

The drum slag had the highest density and water stability. The drum slag had the lowest porosity and the densest microstructure surface, compared with steel slags that other methods produce. The thermal stability of steel slag treated by the hot splashing method was relatively higher than that of steel slag treated by the other two methods.

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Effect of surface modification on properties of steel slag …

The converter steel slag produced by Xiangtan Iron and Steel Group Co., Ltd. which has been aged for 6 months is selected, and the appearance, physical and mechanical properties, chemical composition, mineral composition, and total free calcium content are comprehensively analyzed to evaluate the feasibility of the steel slag as an aggregate of ...

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Semi-dry and aqueous carbonation of steel slag: …

Steel slag exhibits significant carbonation activity, attributed to its relatively high CO 2-reactive components, such as dicalcium silicate, tricalcium silicate, portlandite, and free-CaO, making it a prime candidate for CO 2 sequestration [13], [14].Various methods for the mineral carbonation of steel slag have been proposed, including direct dry carbonation, direct …

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Steel slag in China: Treatment, recycling, and management

Steel slag is the main waste product in the steelmaking process. Because of its chemical composition and technical properties, it can be reused as raw material in steel plants and can serve as a substitute for aggregates in civil engineering. ... Because of its porous structure and alkaline properties, steel slag can be used for wastewater ...

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Chemical, Mineralogical, and Morphological Properties of Steel Slag

International Journal of Advanced Engineering Technology, 2017. This paper review the generation of slag from an integrated steel plant; focusing on, slag generated in blast furnace during process of iron making and through EAF / BOF during process of steel making .The slag generated from BF and EAF/BOF are having different characteristic.

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Use of Steel Slag as an Alternative to Aggregate and Filler in …

M040 aggregate (a); M040 CDM aggregate (b); FM040 steel slag and CDM (c); oven slug (d).2.2. Steel Slag in Asphalt Layer. Concerning the asphalt layer, starting from a mixture of bituminous conglomerate defined as "M0" as a reference, the aim of this phase was optimizing the quantity of slag in an asphalt mixture and, subsequently, to identify for this mixture the optimum …

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