When it comes to steel slag road, there is no blasting, drilling or crushing as the material is waste coming out of a steel industry which is processed and converted to the form of aggregate material used for construction. "The utilisation of waste steel slag for road constructions reduces pollution created by heaps of waste dumped nearby.
In 1998 up to 97% of. the total generated steel slag has been used in different w ays for the. construction of high trafficked roads by Ger many. It is utilized as. aggregate for surfa ce layer ...
The slag processor may also be required to satisfy moisture content criteria (e.g., limit the amount of moisture in the steel slag aggregate prior to shipment to a hot mix asphalt plant) and to adopt material handling (processing and stockpiling) practices similar to those used in the conventional aggregates industry to avoid potential segregation.
As reported, the carbonated steel slag-based artificial aggregates gained crushing values of 15.68–22.48% and bulk densities of 1230–1300 kg/m 3, and moreover, the concrete cast with the carbonated steel slag-based artificial aggregates showed very stable volume when cured in 80 °C water. In order to further reduce the carbonation …
4.2.2 Crushing Value Test. We utilised steel slag aggregate that is sieved by using a 20 mm sieve and then kept on a 12.5 mm screen for performing the crushing test. We carried steel slag aggregate through a crushing test refer to Fig. 3 and the results showed that it had a crushing value of 44.63, which is acceptable for use in …
Specific gravity of steel slag aggregate is found to be 2.68 which is under permissible limit as natural aggregate sample give specific gravity 2.74. Water absorption by the steel slag is 0.503% whereas natural aggregate shows 0.610% water absorption. Impact value obtained for steel slag aggregate is 17.43% which is more than the impact value ...
The use of slag as aggregate reduces the need for material, energy and polluting emissions generated during the mining/crushing, processing and transportation of that material. Effective utilization of this material will have a tremendous economic impact, conservation of natural resources and gainful recycling of process by-products.
The density of steel slag is high, generally above 3.2 g/cm 3, while the density of natural aggregates is about 2.6–2.9 g/cm 3; steel slag has the advantage of physico-mechanical indices, which show that its crushing value and Los Angeles abrasion are higher than that of natural aggregates by 4.7–20.5% and 12.0–52.7%, respectively.
The physical properties of steel slag aggregates are superior to those of crushed limestone aggregates. The major difference between the steel slag and crushed limestone aggregate is the bulk specific gravity. The bulk specific gravity of the steel slag aggregates is 3.34 while it is 2.4 for the crushed limestone aggregates.
Typically, BOFS has high alkalinity [33], [34], low crushing values, a porous structure, and high density because FeO is relatively high [35]. BOFS powder has been widely used in the production of cement clinker. ... Moreover, when the steel slag aggregate with added EDTA was used in concrete casting, the compressive strength …
So far, steel slag aggregate (SSA) has been reported for producing cement concrete and bituminous mixes during road construction [18], ... Meanwhile, the crushing index of aggregate was calculated by weight percentage of the crushed aggregate and the crushing index was measured following the Chinese standard (GB/T 14684-2011). 3.0 …
On the other hand, utilization of steel slag as aggregate is advantageous when compared with normal aggregate concrete mixes. Maslehuddin et al. [27] presented a comparative study of steel slag aggregate and crushed limestone concretes; where, only part of the coarse aggregates is replaced by slag aggregates. The study concluded …
It was reported that the compressive strength of the carbonated steel slag paste achieved around 35.9 MPa after 24 h of carbonation and 34 days of ambient curing [15].
Steel slag is the waste slag generated after steel smelting, which has cementitious activity. However, untreated steel slag can damage the integrity of... This website uses cookies to ensure you get the best experience.
Jaw crusher; It is suitable for processing large steel slag materials (feed particle size ≤ 1200mm). It uses the principle of squeeze crushing, combined with a deep V-shaped and dead zone-free crushing chamber.
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 ...
After the initial crushing by a jaw crusher, the steel slag is reduced to a size smaller than 60 mm. Then, the crushed steel slag is conveyed to a vibrating screen, where steel slag particles larger than 25 mm in diameter are transported to a cone crusher for secondary crushing, resulting in a particle size smaller than 25 mm.
Studies indicate that steel slag formed by crushing and proper process has a similar shape to the natural aggregates [15] and better mechanical properties [16], so it has the potential to become ...
The steel slag coarse aggregate is a converter steel slag produced by a steel plant in Guangxi Province, China, with particle size ranging from 5 to 20 mm, whose gradation curve is shown in Fig. 1. The gradation of steel slag aggregates was found to be within the limits of GB/T 14685–2011 [46]. Because the surface of steel slag is rich in ...
Liu et al. [22] developed artificial aggregates using steel slag, furnace slag, and biochar and pointed out that the CO 2 adsorptive ability of biochar under low concentrations was conducive to ...
that steel slag aggregate surpasses natural aggregate by 27.72% in aggregate abrasion test, 31.41% in aggregate impact value test, 1.94% in ... 3.39% in aggregate soundness test, 6.17% in aggregate stripping value test and 29.81% in aggregate crushing value test. The purpose of this project is mainly to review the properties of steel slag and ...
Studies indicate that steel slag formed by crushing and proper process has a similar shape to the natural aggregates [15] and better mechanical properties [16], so it has the potential to become ...
Regarding the using of steel slag aggregates (SSA) as an alternative material to natural aggregates, the literature reports that SCC mixtures can be prepared with adding SSA as coarse aggregate ...
Crushing of industrial waste aggregates is less dependent on its initial density. ... Steel slag is collected from Uttam Galva Steels Limited which is one of the largest manufacturers of steel elements in Western India. Steel slag is a byproduct created when molten steel is separated from impurities in steel
Natural coarse aggregate is produced by weathering and abrasion or by artificially crushing a more massive rock and mountains. On the other hand, in India, as per Central Pollution Control Board, Ministry of Environment & Forest, iron and steel industries produces steel slag at a rate of 4 million tonnes per annum that is kept dumped in open ...
The aggregates used in this study were crushed granitic aggregates and steel slag aggregates. A stone crusher plant in the Tumakuru District provided natural aggregates of various sizes. The steel slag aggregates were sourced from a steel plant in Tumakuru. As a binder, Viscosity grade 30 (VG-30) was chosen and obtained from the …
Steel slag contributes to high bulk crushing strength of adsorptive aggregates and the addition of miscanthus significantly weakens the bulk crushing strength. When the content of miscanthus is 5%, SS75M5 has a minimum bulk crushing strength of 1.9 MPa, which is 62.7% lower than the adsorptive aggregate without any …
A great amount of steel slag aggregate is used to prepare cement concrete and asphalt concrete in road construction However, the steel slag aggregate processed by the traditional aggregate ...
Table1. Properties of cement Properties Values Fineness 5% Consistency 29% Initial setting time Specific gravity 45 min 3.15 2.1.2 Aggregates Steel slag, a by-product obtained from the steel manufacturing plant, is crushed into pieces and used as a fine and coarse aggregate along with conventional fine and coarse aggregate.
The pile of steel slag occupies a huge area of arable land, and causes environmental pollution; moreover, 7%-15% steel can be recycled from steel slag. After being processed, steel slag can be used as smelter flux, cement raw material, construction aggregate, foundation backfill, railway ballast, road pavement, brick, slag fertilizer and soil ...
Slag aggregate sample was collected from t he crushing plant of steel slag of a local steel manufacturing company. It was found that some sl ag aggregates were light in weight with a lot of voids ...
The crushing value is to put 3 kg of steel slag dried to constant weight into a steel circular test barrel with an inner diameter of 150 mm in three times. Then place the indenter flat on the stone surface in the test cylinder, start the press, make the total load reach 400 kN within 10 min, and remove the load after stabilizing for 5 S. Weigh ...
A great amount of steel slag aggregate is used to prepare cement concrete and asphalt concrete in road construction However, the steel slag aggregate processed by the traditional aggregate ...
It has been proved the accelerated carbonation can effectively alter the microstructure of the artificial aggregate and increase the crushing strength to 5.24 MPa. ... standard 'GB13590-2006 Portland steel slag cement' and UK had published the 'quality protocol guidance of aggregates made with waste steel slag' in 2016. However, the ...
Steelmaking slag is one of the most massive industrial by-products generated during steelmaking processes. This paper presents the current steelmaking slag production status and its potential to use as mineral aggregates in base/sub-base layer of road pavement. The mechanical properties of steelmaking slag were confirmed by the test …
1. Introduction1.1. Background. India is the second-largest steel producer in the world with annual production at 111 million tonnes (Mt) in 2019 [1].For the typical raw material used in the steel plants in India, one tonne of steel production generates up to 1.2 tonnes of solid wastes [2].A significant share of this solid waste is of slag, and it was …
