ASMS have established Blast Furnace Slag products for Roadbases. However, the use of Steel Furnace Slag fines has to date been limited to Asphalt sand and as a general fill.
Knowing engineering properties of Steel Slag Fines (Product SFS 502), ASMS approached road building authority, Roads & Traffic Authority of NSW (RTA) to use this product as a sub base layer. (Generally, 40 mm well graded size is used for sub base layer). RTA also approved new concept of structural pavement design and Steel Slag Fines are now placed as a sub base layer at the RTA's major road, Princess Highway, approximately 100 kms South of Wollongong at Wandandian. The base layer used at the same section is Blast Furnace Slag roadbase. This is a classic example where Steel Slag and Blast Furnace Slag used as composite layers in the pavement. Moreover, conventional sub base layer is replaced by steel slag fines. ASMS and the RTA will be monitoring performance of the pavement and could be world leading example of slag potentials.
Steel Slag Fines as a Subbase
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