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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.
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 slag is screened during production and requires no further processing for use as Bedding Sand.
Granulated sand is a coarse sand-like material with a porous, amorphous structure and ranging from white to golden brown in colour.
Other applications include:
- Retaining wall select fill
- Under slab fill
- Paving Sand
- Grit blasting
- Cementitious properties
- Interlocking particle shape
- Non-corrosive
- Low chloride content
- Completly non-plastic
- Dependable quality
- Lower unit weight
- Lower transport costs
- High stability
- High durability
- Prevents existent of acid conditions
- Lower tonnages required
- Effective utilisation of an industrial by-product
- Conserves natural resources and preserves natural landscape
- Reduces the need for landfill sites
- Reduces energy consumption
PDS-GBF004 : Rev 1 : 01/06/96
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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 |
| Potassium Oxide |
K2O |
<1.0 |
| Sulphur |
S |
<1.0 |
| Sodium Oxide |
Na2O |
<0.5 |
| Chloride Ion |
Cl |
<250 ppm |
| SIEVE |
% PASSING |
4.75mm
|
100
|
2.36mm
|
97-100
|
1.18mm
|
70-85
|
600um
|
30-45
|
425um
|
15-25
|
300um
|
8-14
|
150um
|
3-7
|
75um
|
1-3
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45um
|
0-2
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Maximum Dry Density
|
(Standard)
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1.35 - 1.45 t/m3
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Optimum Moisture Content
|
|
25 - 35%
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Bulk Density
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(Loose) |
0.85 - 1.05 t/m3
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(Compacted)
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0.95 - 1.15 t/m3
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| Material Finer than
|
75um
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<2%
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| Sodium Sulphate Soundness |
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<2% |
Liquid Limit
|
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Not obtainable |
Plastic Limit
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Not obtainable
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Plasticity Index
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Non-plastic
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Linear Shrinkage
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0%
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| Organic Impurities |
|
Free
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Sugar
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Free
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pH
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10 - 12
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Glass Content
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>95%
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Angle of Repose
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Approx. 35° |
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Marketing Department
Australian Steel Mill Services Pty
21 Processing Area
Springhill Road
PORT KEMBLA NSW 2505
Telephone: 02 42551125
Facsimile: 02 4276 2369 |
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