Ground Granulated Blast Furnace Slag (GGBFS), otherwise known as slag, is a by-product of the steel and iron industry which is milled to a fine consistency. Slagment is the registered trade name of our Ground Granulated Blast Furnace Slag (GGBFS). It is a latent hydraulic binder that is used in concrete and other construction applications as a partial cement replacement material. We have the capacity to produce over 800 000 tons of slag per year at our Slagment operation in Vanderbijlpark.

Architectural and Engineering Benefits

Slag offers a number of benefits when used in construction. These include:

Operations and Capacity

Our plant in Vanderbijlpark has the capacity to produce over 800 000 tons of slagment and over 200 000 tons of blended cementitious products per year. We’ve produced slag for over 50 years, contributing to the construction of major structures such as dams, bridges and roads.

Custom-made Slag

We produce a number of different slag products including custom-made products such as:

Stay informed and up-to-date regarding COVID-19. Visit