Steel slag is produced during the steel making process where, after air cooling, a dense rock material is processed and sized into specific products suitable for diverse applications. These include construction aggregates, rail ballast, agricultural soil amendment, in the manufacture of Ordinary Portland Cement and as an environmental remediation material. The durability and surface properties of steel slag also make it an ideal material for use in asphalt where high grip surfacing is required for skid resistance.
Steel slag provides quality aggregates for use in asphalt regulated by current EN Aggregate, Asphalt standards.
Steel slag in construction
Steel slags provide quality controlled manufactured aggregates for use in construction, unbound and bound sub-bases, cappings, fills such as earthworks and backfill to structures (see Specification for Highway Works Series 500, 600 and 800). Unlike Blast furnace slag steel slag Type 1 sub base or blends there of are not approved for use on NHBC sites. Due to its hardness and strength Steel slag can be combined with blast furnace slag for structural fills and sub bases where is LAAV limit is present. Steel slag can blended with Granulated blast furnace slag to produce self-hardening bases.