Main constituent of cement

Recycled crushed sand

At present, DIN EN 197-1 does not define recycled fine aggregates (crushed sands) as main constituent of cement. Cements with ground crushed sand as main constituent are subject to an approval. Apart from technical verifications of the properties in accordance with DIN EN 196-1 and/or DIN EN 197-1 and durability tests carried out on concrete, crushed sands also have to comply with the parameters of eluate and solid matters relevant to the environment.

The investigations within the “R concrete” research project (//www.r-beton.de" target="_blank" >www.r-beton.de:www.r-beton.de) aimed at the development...

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