Blast-furnace slag is formed in the process of blast furnace production. It is used in metallurgy and road construction for making embankments and underlying road layers.
Ungraded slag rubble is also suitable for building of thrust prisms of dams and levees, for strengthening of their slopes prone to wave effects.
Rubble from the blast-furnace slag is easily rolled into the road base, gets cemented and forms a monolithic layer particularly in a mixture of gravel from the weak limestone.
Slag refers to the Y-class of toxicity to "practically non-toxic substances".
Shipment is effected in lots, by rail or road transport.