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Slag Uses:: 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 certified.

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. 

Click here for a typical steel slag chemical analysis (Adobe Acrobat® PDF)

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!

Please contact Beaver Valley Slag to see where steel slag can be used on your next project.

 

More information regarding:

Steel Slag Chemistry (Adobe Acrobat® PDF)

Steel Slag Weights & Densities (Adobe Acrobat® PDF)

 

 

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