What is ground granulated blast furnace slag used for?

GGBS (Ground Granulated Blast-furnace Slag) is a cementitious material whose main use is in concrete and is a by-product from the blast-furnaces used to make iron. Blast-furnaces operate at temperatures of about 1,500°C and are fed with a carefully controlled mixture of iron ore, coke and limestone.

How is ground granulated blast furnace slag made?

Ground-granulated blast-furnace slag (GGBS or GGBFS) is obtained by quenching molten iron slag (a by-product of iron and steel-making) from a blast furnace in water or steam, to produce a glassy, granular product that is then dried and ground into a fine powder.

How do you make a blast furnace slag?

Blast furnace slag (BFS) is a by-product from iron production in blast furnaces, which are fed by a mixture of iron-ore, coke and limestone. In the process, the iron ore is reduced to iron while all remaining materials form the slag, which is tapped off as a molten liquid and cooled.

How much does blast furnace slag cost?

In unground form, granulated slag sells for about $35 per ton and sells for about twice that amount as GGBFS (table 2). This is in contrast to a range of about $3 to $14 per ton for air-cooled slag; the prices are necessarily low to allow the material to compete with natural aggregates.

What is slag used in cement?

Slag cement is a hydraulic cement formed when granulated blast furnace slag (GGBFS) is ground to suitable fineness and is used to replace a portion of portland cement. Once the slag has been cooled and ground to a usable fineness it is stored and shipped to suppliers throughout the United States.

Why is slag added to concrete?

The use of slag in concrete has several benefits, including reduced energy, reduced greenhouse gas emissions, and reduced use of raw materials. – Granulated blast-furnace slag (GBFS)—The glassy granular material formed when molten blast-furnace slag is rapidly chilled, as by immersion in water. …

What is slag in slag cement?

Slag cement is a hydraulic cement formed when granulated blast furnace slag (GGBFS) is ground to suitable fineness and is used to replace a portion of portland cement. It is a recovered industrial by-product of an iron blast furnace.

Why is slag used in cement?

The use of slag in concrete has several benefits, including reduced energy, reduced greenhouse gas emissions, and reduced use of raw materials.

Is blast furnace slag toxic?

When SSRS compares with ground granulated blast furnace slag (GGBFS) from iron making, steel slag contains toxic ingredients such as nickel, cadmium, chromium and strontium. These compounds could be harmful not only for environment but also for human health [9,10].

How much is a ton of slag?

Steel slag costs $25 to $39 per ton or $35 to $54 per yard, depending on the quantity ordered and size of stones. Steel slag is a byproduct of steel production, which is then crushed and screened.

Is iron slag worth anything?

Domestic Production and Use: Ferrous slags are valuable coproducts of ironmaking and steelmaking. Iron or blast furnace slag accounted for about 60% of the tonnage sold and was worth about $290 million; about 85% of this value was granulated slag.

Which cement is better UltraTech or JSW?

JSW Cement Ltd is most highly rated for Job security and advancement and UltraTech Cement is most highly rated for Job security and advancement.

What can blast furnace waste slag be used for?

Consequently, construction waste aggregates and blast furnace slag can be used to improve the mechanical properties, workability, and chemical resistance of the conventional concrete mixtures.

What is the density of blast furnace slag?

The granulated mate- rial, which is ground to less than 45 microns, has a surface area fineness of about 400 to 600 m 2/kg Blaine. The relative density (specific gravity) for ground granulated blast- furnace slag is in the range of 2.85 to 2.95. The bulk density varies from 1050 to 1375 kg/m3 (66 to 86 lb/ft3).

What is the abbreviation for blast furnace slag?

GBFS stands for Granulated Blast Furnace Slag. Abbreviation is mostly used in categories:Slag Furnace Blast Cement Product