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The 3 Rs of innovation: Reduce, Reuse, Recycle

Lafarge markets all of the blast furnace slag produced at its partner steel mills.


Lafarge's patented methods for processing molten slag use the energy inherent in the material to produce products that are sustainable alternatives to non-renewable resources.


Benefits of using slag products:


Instead of air-cooling molten slag in a pit under ambient conditions, expanding and pelletizing take advantage of the energy available in the material.  True Lite Lightweight AggregateTM brand aggregate and LitexTM brand lightweight aggregate are produced without the use of a kiln.

VitrexTM brand pelletized slag and granulated slag, a raw material for a cement production and replacement for portland cement, can be ground directly into cement powder without the use of a cement kiln.



The lower density of slag aggregate equates to savings in trucking costs because of larger volume truckloads. The weight advantage of slag aggregate compared to stone and gravel can provide up to a 35 percent increase in yield.



Blast furnace slag is the co-product of the iron-making process. Each metal refining process produces two products, the metallurgical, or metallic, component and the mineralogical, or non-metallic, slag component. Lafarge processes and recovers the slag using the material's energy to produce a high performance engineered aggregate and raw material for numerous construction applications.  This is an alternative to using non-renewable mineral resources.


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Project Gallery

Discover examples of projects from around North America that have made use of Lafarge products.

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LafargeHolcim. Cement, aggregates, Concrete.