— GGBS is a byproduct of steel production commonly used as a cementitious material as it improves the strength and reduces penetrability by increasing the boundary with the aggregate. ... it has been demonstrated that using a composite mineral admixture known as ground-granulated blast-furnace slag-steel slag composite binder can …
— Among them, nearly 3 billion tonnes of steel slag are not effectively used, and the damage to the environment cannot be ignored. Steel slag is an industrial solid waste produced during the steel making …
— Depending on the processing methods during the steel slag production and the weathering of the slag post-production, the elemental composition of the steel slag largely varies. ... orthorhombic γ-polymorph with volume expansion which causes the buildup of high internal stress that disintegrates the slag to a fine powder which makes it ...
— 1. Introduction. Steel slag, as a co-product of steel-making procedure, is one of the largest industrial solid wastes. In recent years, the accumulated inventory of steel scrap in China has exceeded 1.1 billion tons, while the integrated utilization rate at roughly 22% (Sun et al., 2022a).Contrary to the massive accumulation of steel scrap, the …
— 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 …
— Recycling steel slag into asphalt concrete is an important way to save natural resources and protect the environment. The high asphalt absorption and adsorption and the sensitivity of steel slag aggregate (SSA) to the combined damage of temperature and moisture (volume expansion and poor durability under freeze-thaw cycle damage) still …
— In this paper, steel slag powder was used to replace part of the cement in road concrete, and group tests were carried out on coarse aggregates with different water–cement (W/C) ratios, different steel slag parameters, and different particle sizes. A sample of 100 mm × 100 mm × 100 mm was prepared and cured for 3 days, 7 days, and …
— 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 …
— In this work, steel slag not only adsorbed CO 2, but also be used as cement-based building materials. Zhao et al. used steel slag to fix CO 2 and process the carbon-fixed steel slag into building aggregates for application. Therefore, steel slag has great application potential in hydrogen production and CO 2 fixation. 3 HYDROGEN …
— Slag from iron and steel plants (steel slags, blast furnace slag, etc.), storage of the ashes of burning coals (bottom ash, fly ash) at thermal power plants, and …
— A high added value steel slag and slag composite micro powder(SSCM) technology was provided to address the issues of low activity of steel slag and low …
— Recently, the effect of using steel slag alone is not satisfactory and the performance of blended cementitious materials is expected to improve after compounding with other admixtures. In this study, steel slag powder (SSP) and SP by-products from manufactured sand were employed with a total dose of less than 30% as a replacement …
— Considering global steel production of 1878 million tonnes in 2020, the associated slag by-products possess a significant resource of major components like …
— Expansive soil, as an unsaturated cohesive soil, is considered a harmful geological soil due to its tendency to expand with water and shrink with loss of water. Especially in the alternating environment between dry and wet (D–W) cycles, it can cause engineering accidents because of its deformation. Steel slag powder (SSP) was used as …
— 1. Introduction. Steel slag is a by-product produced during steel-making process, and its emissions account for approximately 10 %− 15 % of crude steel output [1].With the development of the steel industry in China, the output of steel slag has increased rapidly.
— Asphaltic concrete with steel slag powder, bamboo leaf ash and quarry dustvas fillers were compared. • The performance of the replaced asphaltic concrete was evaluated using Marshal stability, ITS, cantabro test, and so on. • Steel slag powder improved asphaltic concrete performed better than the control and bamboo leaf. •
— Protective slag is coated on the surface of molten steel during continuous casting, the flow and heat transfer state of the protective slag is a decisive factor affecting the inflow and consumption of liquid slag and is also an important prerequisite for stabilizing and improving the quality of continuous casting billets. Based on the Navier Stokes fluid …
— 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 …
— 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 …
Steel Slag BOF slag, commonly known as steel slag is another waste from Iron & Steel Industry. It has shown potential for use as a raw mix component up to 10% in the manufacture of cement clinker. Steel slag can also replace granulated blast furnace slag up to 10% in the manufacture of Portland Slag Cement. Steel slags are produced at steel …
— The chemical composition and cooling of molten steel slag have a great effect on the physical and chemical properties of solidified steel slag. 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 …
— Waste heat recovery from hot steel slag was determined in a granular bed through the combination of numerical simulation and an industrial test method. First, the effective thermal conductivity of the granular bed was calculated. Then, the unsteady-state model was used to simulate the heat recovery under three different flow fields (O-type, S …
— Looking at the merits and associated benefits, some of the top steel-producing countries have adopted or upgraded with a recycling technique of steel slags from time to time for various applications (as shown in Fig. 3), such as for road construction, soil enrichment, cement production, etc. Notably, recycling steel slag for a particular …
— This paper first illustrates the production processes, properties, and applications of steel slag, and then summarizes the key findings of the environmental …
— 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 …
— To promote the resource utilization of steel slag and improve the production process of steel slag in steelmaking plants, this research studied the characteristics of three different processed steel slags from four steelmaking plants. The physical and mechanical characteristics and volume stability of steel slags were analyzed through density, water …
— The accumulation of steel slag and other industrial solid wastes has caused serious environmental pollution and resource waste, and the resource utilization of steel slag is imminent. In this paper, alkali-activated ultra-high-performance concrete (AAM-UHPC) was prepared by replacing ground granulated blast furnace slag (GGBFS) …
— The utilization rate of steel slag in China is far behind that of developed countries. The annual output of steel slag is still increasing, resulting in a large amount of accumulation, causing environmental pollution. This paper summarizes and analyzes the relevant research on steel slag powder (SSP) as a cementitious material, studies the …
— Steel slag has great potential as a supplementary cementitious material, because its composition is similar to cement and it has a certain cementitious activity after grinding it into micronized powder [[11], [12], [13], [14]].However, the low hydration activity of steel slag compared to cement limits its application [15], [16], [17], and the reasons for …
— It is explicitly pointed out that the utilization rate of steel slag is still low, resulting in the occupation of a large number of land resources and ecological and …
— In China, BOF slag accounts for about 70% of the annual steel slag production (Cheng and Yang, 2010).In the BOF process (Fig. 1), minor steel scrap and a large amount of molten iron from ironmaking as well as fluxes (lime/dolomite) are added into the furnace, and a 99% pure oxygen flow is applied at supersonic speed through a lance …
Slag carry-over increases the amount of deoxidant needed, increases wear of ladle refractory, and causes reversion of phosphorus (transfer of phosphorus from slag back …
— Slag is the by-product of iron- and steelmaking processes. Normally, around half to one tonne of slag would be generated for yielding one tonne of rolled iron or steel (Lobato et al. 2015).It was reported that the world steel production was 1.9 billion tonnes in 2016, which suggested that at least around 1 billion tonnes of slag is produced during …
— The steel slag produced during the primary stage of steel production is referred to as furnace slag or tap slag. This is the major source of steel slag aggregate. After being tapped from the furnace, the molten steel is transferred in a ladle for further refining to remove additional impurities still contained within the steel.
— This can be explained that HA not only hinders the hydration of cement and steel slag, but also dissolves the Ca(OH) 2 produced by cement and steel slag hydration, thus reducing the pH of HCSDS. From Fig. 15 (b), the pH values corresponding to the maximum UCS of HCSDS containing 0.5, 1.5 and 2.5% HA are 9.99, 9.89 and 9.91, …
— Slag is a complex co-product engineered by adding flux materials to extract impurities from molten iron and steel during manufacturing (Ilyushechkin et al., 2012, Yang et al., 2018).Slags can be characterised as either an acidic slag, neutral slag, or basic slag.
