Blast furnace slag is the non-metallic product consisting essentially of silicates and aluminosilicates of calcium and other bases, which is developed in a molten condition simultaneously with iron in a blast furnace.

DESCRIPTION Molten blast furnace slag is cooled in pits then dug, crushed and screened to produce a range of products including a graded 20x10mm concrete aggregate. Aggregates are aged in stockpiles and watered to achieve SSD for dispatch. ADVANTAGES Economic alternative to natural aggregates Vesicular particle surface improves mechanical interlock Non-plastic, durable Fire and heat resistant TYPICAL GRADING SIEVE % PASSING 26.5 mm 100 19.0 mm 97 13.2 mm 65 9.5 mm 33 4.75 mm 6 2.36 mm 4 Conforms to AS2758.1 – 20mm graded aggregate     PDS-ABF259 : Rev 2 : 22/09/06

CHEMICAL PROPERTIES Blast furnace slag is composed of silicates and aluminosilicates, primarily from the melilite group of minerals. Typical oxide analysis is shown in the following table: CONSTITUENT SYMBOL % Calcium Oxide CaO 40 Silica SiO2 35 Alumina Al2O3 14 Magnesia MgO 6 Iron Oxide FeO 0.4 Potassium Oxide K2O 0.4 Sulphur S 0.8 Sodium Oxide Na2O 0.3 TYPICAL PHYSICAL PROPERTIES Bulk Density – Loose 1.16-1.26 t/m3   – Compacted 1.26-1.36 t/m3 Particle Density – Apparent 2.67-2.77 t/m3   – SSD 2.48-2.58 t/m3   – Dry 2.38-2.48 t/m3 Water Absorption   3-6 % Chlorides   <0.02 % Sulphates as SO3   <0.2 % Alkali Reactivity   Innocuous Sugar   Free 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