Steel Slag Uses
Steel slag is
very similar to blast furnace slag, yet it is also very distinct.
Both types of slags are produced as limestone is chemically
converted in high temperature processes. The blast furnace slag is
made in a blast furnace, and consequently steel slags are produced
in steel making processes (e.g. basic oxygen furnace or in an
electric arc furnace). Steel slag product names are identical to
blast furnace slag products and the steel slags are also PennDOT
Since steel is produced
at much lower temperatures, it typically has a much different chemistry than
its blast furnace counterpart. There is usually much more residual iron in
steel slags, which account for its darker color. Steel slags also have a
higher magnesium concentration, so care must be taken when incorporating
them into the cement/concrete processes. However, they can be used just
about anywhere that blast furnace slags can be used.
Over the years, steel
slag has been criticized for its expansion characteristics. Cases of
asphalt parking lots and drainage trenches heaving and cracking have
validated this concern. In response, PennDOT developed the procedure PTM
130 to ensure that any job that specifies certified steel slag is protected
fro expansion concerns. All Beaver Valley steel slag is PennDOT certified,
and does not display any expansion characteristics!
contact Beaver Valley Slag
to see where steel slag can be used on your next project.