scope:

This Standard specifies the iron and steel slag used for the base course and the hot laid asphalt mix of roads (hereafter referred to as "iron and steel slag for road construction").

NOTE 1 For the iron and steel slag, there are the blast furnace slag that is produced in the pig iron manufacturing process and the steelmaking slag that is produced in the steel manufacturing process. The blast furnace slag is classified into the air-cooled blast furnace slag and the granulated blast furnace slag according to the difference in cooling process. The steelmaking slag is classified into the convertor-system slag and the electric furnace-system slag according to the difference in manufacturing methods of steels.

NOTE 2 In the iron and steel slag for road construction, there is one that is manufactured for the base course material using blast furnace slag and steelmaking slag as material, singly or in combination, and the other that is manufactured for the aggregates to be used for the hot laid asphalt mix and the bituminous stabilization (heating mixture) using steelmaking slag as material.