Product Code RBU100

Steel furnace slag is the non-metallic product consisting essentially of calcium silicates with fused oxides of iron and, aluminium that is developed in a molten condition simultaneously with steel in a basic oxygen furnace.

Air-cooled blast furnace slag is a predominantly crystalline, solid rock-like material. Basalt is a fine-grained volcanic rock type.

DESCRIPTION Air-cooled slag is dug, crushed, screened and mechanically blended with basalt fines to form DGB20 Slag/Basalt Roadbase. The fine aggregate portion is predominantly basalt fines. APPLICATIONS High quality (flexible) roadbase conforming to RTA Specification 3051 ADVANTAGES Interlocking particle shape Ease of compaction Lower tonnage required per cubic metre Effective utilisation of an industrial byproduct conserving natural resources TYPICAL GRADING SIEVE % PASSING 26.5 mm 100 19.0 mm 95-100 13.2 mm 70-90 6.7 mm 50-70 2.36 mm 30-55

TYPICAL PHYSICAL PROPERTIES Maximum Dry Density (Standard) 2.00-2.10 t/m3 Optimum Moisture 10-12% Misshapen Particles (2:1) <10% (3:1) <2% Fractured Faces 100% Dry Strength 90-115 kN Wet Strength 75-100 kN Variation <25% Fine Particles Size Distribution “A” Ratio 35-45% “B” Ratio 40-50% “C” Ratio 40-50% Liquid Limit <20% Plastic Limit Non-plastic Plasticity Index 0% Linear Shrinkage 0% Maximum Dry Compressive Strength >1.7Mpa PDS-RBU100 : Rev 1 : 01/06/06

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