Slag Aggregates in Concrete

Slag aggregates are now often preferred in specification as they are recognised to be a valuable material supporting versatile performance qualities.

Granulated blast furnace slag (GGBS)

Primarily used in the manufacture of concrete products as a cement replacement. It has been used in cement combinations and as a cementitous component in concrete for many years and the use of GGBS will continue to help meet sustainability demands.

Aggregate

Blast furnace slag, peletised slag and granulated slag can be used as an aggregate in concrete replacing primary aggregates in a number of applications.

Mortar

GGBS used as a cementitous component in mortars enhances workability and can allow further working time for the bricklayer.

Grout

Grouts containing GGBS offer control of temperature rise during hydration and in areas of aggressive conditions. Slag can be used as a fine aggregate replacement in both grout and mortar in most applications.

Road making

As well as offering improved performance in dressing layers of asphalt, slag aggregates can also be used in base layers of roads. Unground GBS is a robust alternative as a base layer material in road construction, known as slag bound macadam (SBM). Quality controlled and offering high performing engineering properties, slag aggregates can be used in a wide range of construction projects including bridges, roads, buildings and rail ballast.

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