Granulated Blast Furnace Slag
Granulated blast furnace slag (GBFS) — glassy granular material for cementitious and construction uses with 85-97% glass content.
Overview
Built for Industrial Buyer
Granulated blast furnace slag is a glassy granular material formed when molten blast furnace slag is rapidly cooled by direct water contact. This non-metallic co-product of iron manufacturing develops strong hydraulic cementitious properties when ground finely. Supplied from Kutch, India with large export volumes and bulk packing capability at 50,000 metric tons per month.
High glass content (85-97%)
Glassy non-metallic silicates and alumino silicates of calcium
High ultimate and compressive strength
Low heat of hydration
Improved durability and corrosion resistance
Low alkali content
Stable chemical composition
Export-scale supply from Kutch
Applications
Packaging
- •Bulk loading
- •Bagged at 1200 kg/m³ bulk density
Specifications of Granulated Blast Furnace Slag Powder
| Parameters | % by Mass / Value |
|---|---|
| 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% |
| Size (+5mm Max) | 5% |
| Relative Gravity | 2.9 |
| Bulk Density (Bagged) | 1200 kg/m³ |
Advantages of Blast Furnace Slag Based Cement
| Property |
|---|
| High ultimate strength and compressive strength of concrete |
| Highest degree of durability of concrete structures |
| Low heat of hydration — minimizes thermal cracks |
| Increased workability and concrete impenetrability |
| Enhanced mixability, mobility, and compactability |
| Low alkali content — reduces alkali-aggregate reaction |
| Optimum setting time with high compressive strength |
| Steel corrosion protection in concrete |
| Self-compacting concrete with lower water-cement ratio |
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