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Blast furnace slag is the non-metallic product consisting essentially of silicates and aluminosilicates of calcium and other bases, that is developed in a molten condition simultaneously with iron in a blast furnace.
Granulated blast furnace (GBF) slag is a glassy, granular material.
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Molten slag is passed through high volume water sprays, breaking the slag stream up into small droplets and cooling them so quickly that crystallisation is suppressed.
Granulated sand is a coarse sand-like material with a porous, amorphous structure and ranging from white to golden brown in colour.
- Block making
- Roadbase Stabilisation
- Water Treatment
- Cementitious properties
- Bright colour
- Low chloride content
- Effective utilisation of an industrial by-product
- Conserves natural resources and preserves natural landscape
- Reduces the need for landfill sites
- Reduces greenhouse gas emissions
PDS-GBF004 : Rev 1 : 13/08/09
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Blast furnace slag is composed of silicates and aluminosilicates, but for ease of reporting oxide equivalents are used and fall within the relatively narrow limits given below:
| CONSTITUENT |
SYMBOL |
%
|
| Iron Oxide |
FeO |
<1.3% |
| Calcium Oxide |
CaO |
38 - 43 |
| Silicon Dioxide |
SiO2 |
32 - 37 |
| Aluminium Oxide |
Al2O3 |
13 - 16 |
| Magnesium Oxide |
MgO |
5 - 8 |
| Titanium Dioxide |
TiO2 |
<1.5 |
| Manganese Oxide |
MnO |
<1.0 |
Hydraulic Index
|
CaO+MgO+Al2O3
SiO2 |
1.7 - 1.9
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| Chloride Ion |
Cl |
<250 ppm |
| Bulk Density (Loose) |
0.85 - 1.05 t/m3 |
| Glass Content |
>85% |
| Angle of Repose |
Approx. 35° |
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