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De werny BALLASTIERES site in Marckolsheim introduceerde begin 2017 de BENOR-certificering van gerolde materialen voor klanten in België.
Deze certificering is verkregen op 7 juli 2015 voor de volgende granulometrie:
- Rollend grind 2/8 R
- Rollend half-gerold 2/8
- Rollend grind 4/16 R
- Rollend grind 4/22 R
- Rollend grind 4/32 R