Quality control

Our iron-silicate products are subject to quality control in accordance with the System 2+ in accordance with:

  • DIN EN 13383-1 and TLW 2003 respectively for hydraulic construction
  • DIN EN 13043 and 13242 and TL Gestein-StB04 respectively for road construction and are CE- certified

The asphalt laboratory, Wahlstedt, that is authorised in accordance with RAP-Waba und RAP-Stra conducts the required material tests for our own works production control (WPC).

In addition, we are a member of the Gütegemeinschaft Metallhüttenschlacken (Quality Association Smelter Slag) and fulfil the requirements of the voluntary quality control in accordance with RAL for hydraulic engineering.