Granulated Iron Blast Furnace Slag (GBFS)

Source	Granulated BF Slag from Gujarat State, India
Supply Quantity	50,000 metric tons per month
Packing	Bulk

Typical Chemical Composition

Parameter	% by Mass
CaO	30–38
Al₂O₃	15–20
SiO₂	30–40
Glass Content	85–97
MgO	8–11
Fe₂O₃	0.5–1.5
Moisture	10 max
Size	−5mm Min 95, +5mm Max 5
Relative Gravity	2.9
Bulk Density (Bagged)	1200 kg/m³

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.