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This study enhanced the hydration of steel slag (SS) by the synergistic chemical activation of triisopropanolamine (TIPA) and sulfite/sulfate. ... 30% RH) until the specified testing age. The specimens were divided into two parts according to the research objectives: Part I: For the DASS composites, pastes with two water-to-binder (W/B) ratios ...
The SS used in the study was obtained from Jiuquan Iron and Steel Group Co., Ltd. and had been stacked in the natural environment for more than one year with a maximum dry density of 2.65 g/cm 3 and an optimum moisture content of 7.0%. Fig. 2 shows the sieve curve. The properties of SS aggregate measured according to the Chinese standard [27] are …
with air-quenched steel slag, and elucidated that air-quenched steel slag as an abrasive can meet the requirements of indus-trial cleaning. Arifvianto 21,22)et al. used 2–5 mm steel slag ball and 3.18mmspherical shots to sandblast titanium surface, which improved the surface and subsurface roughness of tita-nium. The steel slag ball blasting ...
As by-products of blast furnace ironmaking processes and coal-fired power plants, GGBS and FA have been widely considered alkali-activated material precursors many years ago due to their stable properties and abundant reserves [6], [7], [8].Alkali-activated GGBS has excellent mechanical properties but problems such as high yield stress, short setting time, …
The steel slag was obtained from a steel mill in Guangxi Province, China; SS is a coarse particulate solid waste generated during the melting and conversion of iron scrap into steel in a basic oxygen furnace. ... The thermal decomposition process of FGM from room temperature to 1200 °C was divided into six intervals according to the ...
The chemical composition of steel slag is highly variable and depends on the steel making process, the raw materials used, and the furnace conditions (Shi, 2004). Needless to mention, variability in physical properties of slag has also been observed.
This article reports a material case study on the combined use of three industrial by-products (metallurgical slags), namely copper slag (CS), stainless steel slag (SS) and ground granulated blast furnace slag (GGBFS) as solid precursors to produce binary blend alkali activated materials (AAMs).
However, steel slag powder itself has a distinct hydration activity [18], [36]. It can be catalysed by mechanical or proper activators to obtain a higher mechanical strength. Steel slag is suitable for the replacement of the above aluminosilicate materials because it offers more valuable economic benefits for fabricating alkali–activated ...
Steel slag, an alkaline industrial by-product of the steelmaking process, constitutes 15–20% of crude steel output [1], [2].Annually, China produces over 100 million tons of steel slag [3], yet the utilization rate of steel slag remains below 30%, with the majority relegated to landfill disposal [3], [4].Consequently, China has accumulated more than 1.3 …
Alkali-activated slag (AAS), a green cementitious material, can be used to replace ordinary Portland cement (OPC) [[1], [2], [3]]pared with OPC, AAS has outstanding mechanical properties [4] and corrosion resistance [5, 6].Furthermore, AAS has excellent high-temperature resistance [7] compared to OPC [8, 9].Therefore, AAS can be used as an …
Steel slag is the waste residue produced in the process of steelmaking. It is a composite oxide solid solution formed by the addition of lime and fluorite, the erosion of the furnace lining, and the oxidization of silicon and other materials in the molten iron [1], [2].China is a major producer of steel slag, and the annual output is approximately 15%–20% of the crude …
This paper reviews the production, processing, and characteristics of steel slag, and its use as a cementing component in different cementing systems. The chemical …
The physical properties of steel slag according to National Slag Association [5] are angular shape, generally well-graded material, has a high degree of internal friction angle and high shear strength. Steel slag has high bulk specific gravity and usually less than 3% water absorption as well as dry unit weight 1600 – 1920 kg/m3 [5].
In order to improve performance of bio-cementation, many strengthening materials were applied to the bio-cementation of tailings. Steel slag (SS) is a kind of industrial solid waste, its chemical composition and mineral composition are similar to cement, and it has a certain application prospect as an auxiliary cementing material.
1. Introduction. As a kind of byproduct generated during the manufacturing of steels, steel slag accounts for 25% of the total solid wastes. Because of its complicated composition and unstable performance as well as the slow development of processing technology, nearly one billion tons of steel slag has currently been accumulated in China, of …
The mineral composition in steel slag powder is similar to that of cement, including C 3 S, C 2 S, etc., which can react with water, enabling steel slag powder to be used as supplementary cementitious material [3].However, deficiencies such as limited activity and poor stability of steel slag powder significantly restrict its applicability [4, 5]. ...
2.1. Production of Steel Slag. Slags of various types account for approximately 90% (by mass) of the byproducts discharged from the crude steel smelting process; the others are gas, dust, and sludge [].Figure 2 presents the crude steel smelting process. According to the difference in crude steel smelting processes, steel slag can be divided into basic oxygen …
A study was conducted to evaluate the effect of metallurgy slag on soil chemical properties and grain yield of upland rice under sprinkler irrigation. Treatments include two scums: blast furnace (196g/kg of Si) and steel slag (56 g/kg of Si), and a control without application. The scums can be used to correct soil acidity and silicon source.
Basic oxygen furnace steel slag (SS) is the by-product of steel production and constitutes 15–20% of steel output [1], [2].In 2013, China's crude steel production reached 782 million tons and accounted for 50.84% of the world's steel production, which was the first time that China's output represented the majority of the world's steel production.
This is an experiment on the effect of adding various slag concentrations as Portland composite cement (PCC) on the mechanical and chemical properties. Slag waste is lumps of low-quality metal mixed with other materials. The elemental content of Ca in slag has the potential to be used as a substitute for PCC cement in cement mortar products. Slag powder …
between the chemical structure and actual physical (and chemical) properties of steel slag, e.g. expansibility and alkaline pH, provides quantitative understanding of the characteristic …
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 …
steel slag with valuable properties, making it suitable for construction, road building, cement production, and more. Steel slag possesses unique properties and composition that make it highly versatile and attractive across various industries. In the construction sector, its applications have garnered signicant attention due to its promising ...
Due to the potential to advance the concrete industry towards the development of sustainable construction materials, there has been a growing interest in researching the combination of geopolymer binders with recycled aggregates (RA) to address the challenge of utilizing CDW and industrial waste [9], [10], [11].On one hand, industrial waste such as blast …
The theoretical feasibility of using steel slag as an oxygen carrier in chemical looping reactions has been proven previously [29, 30]. However, many different types of steel slag are produced during steel making, and their physical and chemical properties are different [31, 32]. Therefore, it is necessary to conduct an in-depth study on the ...
The main chemical compositions of the steel slag were characterized by chemical analysis and shown in Table 1, and the steel slag were pretreated by grounding into particles less than 0.1 mm in diameter to eliminate the composition fluctuations in the raw materials. However, 50% used in this experiment cannot satisfy the desired composition of ...
In this work, the effect of slag chemical composition on the chemical leaching of about seventy EAF carbon steel slags of different production steel grades was investigated. Standard leaching tests (24 h at 10 l/kg) in deionized water on slag bulks were performed and the results were correlated with the slag chemical composition. The survey has ...
Steel slag (SS) is an alkaline waste slag discharged during steelmaking [21].About 10%–15% SS is generated in the converter process [22].In addition, SS has potential pozzolanic activity, and its total content of C 3 S and C 2 S generally reaches more than 50%, which is suitable for the preparation of low-carbon cementitious materials [23].Our research group has …
In this study, a coarse particle steel slag powder was selected with a specific surface area of 117.3 m 2 /kg for the following reasons: firstly, when steel slag is used as a drying agent, a lower hydration rate is beneficial to preserve the main minerals of steel slag which can be used in later carbonation S/S; and secondly, the cost of ...
The proportions of these oxides determine the specific chemical characteristics of the slag. Slag exhibits a certain level of basicity, which is determined by the ratio of basic oxides (e.g., CaO and MgO) to acidic oxides (e.g., SiO 2 and Al 2 O 3). The basicity of slag influences its properties, such as the melting point, viscosity, and ...
According to the main smelting process, steel slag can be divided into basic oxygen furnace (BOF) slag (also known as converter slag) and electric furnace (EAF) slag [2].
The materials include loess soil, steel slag, Portland cement (P·O 42.5), and lime. The pore size distribution, morphology, and chemical composition of loess soil, steel slag and Portland cement are shown in Fig. 1 (a), and (b) shows their XRD patterns. The basic physical indexes of the loess soil are listed in Table 1.. Download: Download high-res image (392KB)
Steel slag is considered to improve the road performance of cold mixed asphalt (CMA) due to its superior physicochemical characteristics. To realize the potential application of steel slag in CMA pavement, the alkalinity, hydration activity, pore characteristics, and three-dimensional (3D) morphology were quantitatively characterized and evaluated based on the X …
The history of the use of iron and steel slag dates back a long way and in 2006 European Slag Association noted that the earliest reports [2] on the use of slag refer to Aristotle, who used slag as a medicament as early as 350 B.C. Throughout history, the use of slag has ranged from the novel to the usual including: cast canon balls in Germany ...
The effects of steel slag powder and hybrid expansive agents on the hydration characteristics and persistent shrinkage of UHPC are investigated. The results indicate that 15 wt.% steel slag powder and 5 wt.% hybrid expansive agents can effectively reduce the drying shrinkage deformation of UHPC with a slight decrease of strength.
According to Nippon Slag Association's statistics on the use of slag in 2012, the total consumption of blast furnace and steelmaking slags for fer-tilizer and soil amendment was 260 000 tons. 2.2 Fertilizers made from blast furnace slag and steelmaking slag Iron and steel slag can largely be divided into blast furnace slag and steelmaking slag.
Steel slag is produced globally in huge annual quantities. How to achieve its large-scale utilization is a question that researchers have been exploring. In this work, sodium citrate …
The chemical composition, mineralogy, and morphology of steel slag particles can influence both the cementitious characteristics and mechanical properties of steel slag. Two …