Granulated Iron Blast Furnace Slag

Typical Chemical Composition

About the Product

Blast furnace slag is used in the production of cement (iron Portland and blast furnace cement). Air-cooled blast furnace slag is formed by allowing the molten slag to cool relatively slowly under ambient conditions; final cooling can be accelerated with a water spray. The cooled material is hard and dense, with a vesicular texture and closed pores. After crushing and screening, air-cooled slag can be used in several applications.

Granulated slag is formed by quenching molten slag in water to form sand-sized particles of glass. The disordered structure gives the material moderate hydraulic cementitious properties when very finely ground into granulated blast furnace slag; with access to free lime, it develops strong hydraulic cementitious properties. Rapid cooling prohibits the formation of crystals and forms glassy, non-metallic silicates and alumino silicates of calcium.

Advantages of Blast Furnace Slag Based Cement

• High ultimate strength of concrete
• Highest degree of durability of concrete
• Substantial improvement in the durability of concrete structures
• High compressive strength, surpassing OPC 53 grade strength requirements
• Low heat of hydration, ensuring minimal thermal cracks
• Increased workability, making concrete more impermeable and resistant to atmospheric pollutants
• Optimum workability with enhanced mixability, mobility and compactability from uniform particle size distribution
• Low alkali content — reduces susceptibility to alkali aggregate reaction
• Optimum setting time with high compressive strength
• Protects steel bars from corrosion, giving self-compacting concrete with a lower water-cement ratio

Environmental Performance of BF Slags

• Effective utilization of by-products
• Energy saving
• Saving in virgin raw material
• Reduction in green house gas

Export of Material

We source GBFS from our State of Gujarat in India. We have 2 major sea ports available for export — Kandla & Mundra — and can export Granulated Blast Furnace Slag from either of these two major sea ports.