This European Standard specifies the properties of aggregates obtained by processing natural, manufactured or recycled materials and mixtures of these materials for use as armourstone. It provides for the evaluation of conformity of the products to this European Standard. NOTE 1 The requirements in this European Standard are based upon experience with armourstone types with an established pattern of use. Care should be taken when considering the use of armourstone from sources with no such pattern of use, e.g., recycled armourstone and armourstone arising from certain industrial by-products. Such armourstone, which should comply with all the requirements of this European Standard, could have other characteristics not included in Mandate M 125 that do not apply to the generality of armourstone types with an established pattern of use and when required, provisions valid at the place of use can be used to assess their suitability. NOTE 2 Finer aggregates than specified in this European Standard are used in hydraulic structures. For such aggregates European Standards for other end uses of aggregates should be applied.