production of slag used as aggregates

The LS was collected from the lithium salt plant in Xinyu, Jiangxi Province (China). These raw materials were dried in an electric oven at the temperature of 105 °C. Afterwards, they were crushed and ground to fine powder. The obtained fine powder was sieved through a 75 μm nylon mesh sieve before being used for LWA production.

Depending on the used production technology, the steel slag can be divided into a basic oxygen steel slag, an electric arc furnace slag and a ladle furnace slag (De Brito and Saika, 2013). The steel slag is used as a secondary cementitious binder, or aggregates for road construction (Sheen et al., 2013; Manso et al., 2004).

Slag of iron and steel used as aggregates for asphalt roads can be recovered as by-products. The steel slag is a residue of the production process of steel. The slag is mainly composed by: silica, alumina, titanium, iron sand and combinations of calcium and magnesium oxides. The function of the slag during the steelmaking process …

1.5.1.6 Slag. Slag aggregates are obtained by crushing of smelter slag or by special treatment of fire-liquid slag melt (molten slag aggregates). Currently there are many types of concrete that are developed and used in construction that include metallurgical slags both as a binding component and as fillers.

Since the construction waste and blast furnace slag wastes are available in vast amounts in Turkey, it is economically and environmentally suitable to use these materials as aggregates in the production of more durable concrete mixtures. © 2015 The Authors. Published by Elsevier Ltd. Peer-review under responsibility of Istanbul …

Electric arc furnace slag (Fig. 2 ), crushed by the producer and supplied in three different sizes, fine (f), medium (m), coarse (c) ( Fig. 1 ), was added as a partial substitution of the natural ones. The specific mass of EAFs, in the range 3630–3760 kg/m 3 was compared to the corresponding values of natural aggregates in Table 1.

Request PDF | Production of concretes using slag aggregates: Contribution of increasing the durability and sustainability of constructions | The main by-product of …

Steel slag is a by-product discharged from the steelmaking process, which is characterized by abundant free calcium/magnesium oxide, low cementitious properties, …

In the cement production two main ores are used: limestone rich in CaO, and clay, rich in SiO 2, Al 2 O 3, Fe 2 O 3 and MgO. ... A Systematic Literature Review, approaching the use of blast furnace slag in cementitious materials used in paving was performed, in which the physical-chemical properties and mechanical resistance were …

A study shows that while using basic oxygen furnace slag as the raw material of artificial aggregates, ... Apart from these commonly used aggregate production techniques, Flashag is another patent aggregate manufactured from fly ash. These aggregates are not pelletized but sintered, and the process is considered simple …

Ferronickel slag (FNS) is a by-product of nickel production that is used as an alternative fine aggregate. This study evaluates the workability, compressive strength, splitting tensile strength, flexural strength, modulus of elasticity and chemical leaching characteristics of concrete containing FNS from garnierite ore and fly ash.

Blast Oxygen Furnace (BOF) slag represents one of the largest waste fractions from steelmaking. Therefore, slag valorisation technologies are of high importance regarding the use of slag as a secondary resource, both in the steel sector and in other sectors, such as the construction or cement industries. The main issue regarding the …

Utilizing treated steel slag as coarse/fine aggregate in concrete production is a high-value solution that can alleviate the worry about resource depletion and solve the negative impact of steel slag stockpiling in slag disposal yards. 4.1. Density The density of SSA is 10–50% higher than that of NA.

Ferrous slag is currently underutilized. Although the construction industry does use some slag as an aggregate, most is simply discarded. However, slag could be used to treat acid soils or acid mine drainage. Doing so would both offset the cost of restoring abandoned mine areas, as well as decrease steel manufacturers' current …

This study evaluates the use of Steel Slag Aggregates (SSA) as a substitute for natural aggregates in the production of hot mix asphalt (HMA) for road construction. Based on intensive laboratory ...

This paper investigates the use of slag aggregates of electric arc furnace (EAFS) and ladle furnace slag (LFS) in replacement of fine and coarse conventional …

A novel process for the production of angular-shaped high strength fly ash aggregates from an energetic, and environmental perspective is presented in this paper and compared with the production of natural aggregates. This study is significant because there is an increasing demand for aggregates and no published research addressing …

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 …

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 untreated steel slag aggregate (SSA ...

In agriculture, slag aggregates (Ag-Slag) have been used as an agricultural material since the 1920's in all types of crop production and landscaping. The materials are used to maximise yields of cultivated crops and pasture, …

Therefore, steel slag particles have the potential to be used as coarse/fine aggregate in concrete production. Steel slag is still a solid waste rather than an available resource because of the poor volume stability of SSA. The expansion chemical components in steel slag include f-CaO, f-MgO, and β-C 2 S. Among them, f-CaO is the main reason ...

30,000 tonnes of aggregate [15]. This fact notwithstanding, large quantities of BOF slag can meet the needs of aggregates for road construction. The use of waste and by-products is one of the most promising techniques for sustainable roads, as it provides a double benefit [16]. On the one hand, it reduces the extraction and …

Ferrochrome slag aggregates (FCSAs) have similar mechanical properties as natural aggregates and are a by-product of the ferrochrome alloy industry, with a production rate of about 1.5 tons per ...

Steel slag is a by-product of the steel industry and can be used potentially as aggregate in the asphalt mixture. This study evaluates the use of Steel Slag Aggregates (SSA) as a substitute for natural aggregates in the production of hot mix asphalt (HMA) for …

Steel slag is a by-product of the steel industry and can be used potentially as aggregate in asphalt mixture. This study evaluates the use of Steel Slag Aggregates (SSA) as substitute for natural aggregates in the production of hot mix asphalt (HMA) for road construction. Based on intensive laboratory testing program, the characteristic …

A maximum slag particle size of 4.75 mm was used with limestone aggregate as the control sample. Refined bitumen of 60/70 penetration from the Tehran Bitumen Factory was used. Four steel slag samples of contents 0, 5, 10, 15 and 20% in terms of total aggregate weight were utilized. The binder content was 3.8% for all …

Electric arc furnace (EAF) steel slag, generated from carbon steel production process, is the most interesting. from the asphalt technology point of view. This paper aims to explore the ...

1. Introduction. Ferrochrome slag is a by-product of the production of ferro-chrome alloy, an essential component in stainless steel. The conventional process of ferrochrome making involves the carbothermic reduction of chromite ore where around 1.2–1.5 tons of slag containing approximately 8–12% of chromium oxide is generated …

Steel slag is the by-product during the separation of molten steel from impurities in the steel-making furnace. The basic oxygen furnace (BOF) slag, electric arc furnace (EAF) slag, and ladle furnace (LF) slag are three major types of SS produced in the steelmaking processes.As drawn in Fig. 2, BOF slag and EAF slag are both produced …

The use of slag aggregates from iron and steel production in construction dates back to the Romans who used crushed slag from the crude iron production of that time to build their roads. Slag is particularly useful as an aggregate, due to the high mechanical resistance of the slag grains which exceeds those of many natural …

Slag of iron and steel used as aggregates for asphalt roads can be recovered as by-products. The steel slag is a residue of the production process of …

The comprehensive investigation of lightweight aggregate production using aluminosilicate-rich MTs in combination with commercial slag as a reactive aluminosilicate remains largely unexplored. In this study, mixtures of MTs and slag were pelletized through the application of a pan pelletizer machine. The study focused on examining the impact …

Slag, as shown in Fig. 1, is the 16th ingredient of high-performance concrete production [22], called supplementary cementitious materials (SCM) [23], that can enhance the strength and durability of concrete [2].The highly fine slag powder, with a surface area of 400–600 m 2 /kg and a bulk density of 1200 kg/m 3, can be mixed with …

The main by-product of the steel industry is slag. This paper investigates the use of slag aggregates of electric arc furnace (EAFS) and ladle furnace slag (LFS) in replacement of fine and coarse ...

Moreover, slag occurs in two main forms: crystalline and granulated slag. It is used in concrete production as coarse aggregates, fine aggregates, and mineral admixtures, depending on its formations. The crystalline form commonly used is the coarse BFS and electric arc furnace (EAF) slag while the granulated form is BFS fines and …

Steel slag can be directly used as sinter flux and iron smelting flux for the production of steel . The pretreated steel slag can be utilized directly for road …

Steel slag can be directly used as sinter flux and iron smelting flux for the production of steel [ 6 ]. The pretreated steel slag can be utilized directly for road construction (around 49.7% in the US), as aggregate in the manufacture of concrete or asphalt (the main recycling route), or both [ 6 ].

Steel slag production is estimated as 10–15% of crude steel production [17]. According to World Steel Association (Worldsteel) ... When steel slag is used as aggregate in asphalt superstructure, it showed higher stability values when compared to commonly used limestone samples. The reason for the better performance of the slag …

This study focuses on fine aggregates and their use. The first step in determining the ideal replacement ratio is to perform a compressive strength test on a 150 mm × 150 mm × 150 mm cube. Over the course of 28 days, steel slag replaced coarse aggregate at levels of 20%, 0%, 60%, and 80%.

The use of steel slag aggregates in concrete by replacing natural aggregates is encouraging because their effect on concrete strength is greater than that of natural river sand. For this study, a normal strength (C-25) of concrete with 0%, 15%, 30%, 45%, and 60% replacement of steel slag was utilized for 3 days, 7 days, 28 days, and 56 days of ...