Product Code ABF275
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.

PROCESS Molten slag is either directed into pits adjacent to the furnace or run into pots, then tipped into bays and allowed to solidify under atmospheric conditions. Cooling may be accelerated by application of water to the solidified surface, after which the slag is dug, crushed and screened to produce various products including 75mm Aggregate. DESCRIPTION 75mm Aggregate is a fine grained, grey coloured rock type consisting of angular to roughly cubical shaped particles with a characteristically vesicular structure and rough surface texture. APPLICATIONS Civil works projects including: Embankment fill Gabion mattress Sub-grade replacement Filter medium ADVANTAGES Interlocking particle shape Resistant to weathering Dependable quality Lower unit weight Lower transport costs ADVANTAGES IN CIVIL WORKS High stability High durability Free draining Lower tonnages required ENVIRONMENTAL VALUE Effective utilisation of an industrial by-product Conserves natural resources and preserves natural landscape Reduces the need for landfill sites Reduces energy consumption PDS-ABF275 : Rev 1 : 01/06/96		CHEMICAL PROPERTIES 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 <2000 ppm TYPICAL GRADING SIEVE % PASSING 90.0 mm 100 75.0 mm 65-100 37.5 mm 0-8 19.0 mm 0-3 TYPICAL PHYSICAL PROPERTIES Bulk Density (Loose) 1.10 - 1.20 t/m3   (Compacted) 1.20 - 1.30 t/m3 Material Finer than 75um <2% Misshapen Particle (2:1) <10%   (3:1) <2% Fractured Faces   100% Dry Strength   >70kN Wet Strength   >60kN Variation   <25% Los Angeles Value   <45 Sodium Sulphate Soundness   <2% Iron Unsoundness   Free
TECHNICAL SERVICES AND CUSTOMER ENQUIRIES Marketing Department Australian Steel Mill Services Pty 21 Processing Area Springhill Road PORT KEMBLA NSW 2505 Telephone: 02 42551125 Facsimile: 02 4276 2369