Continuous quality on asphalt chippings with new NW ...

Jun 14, 2019· Christian and Sebastian Collas, the owners of Collas Kies und Sandwerke , operate three crushing locations in 3rd generation in the JülichZülpicher Börde, Germany. At their gravel site in Ellen, Niederzier, there is recycling production for the processing of construction waste and they also have two other quarries in Morschenich Buir and Golzheim.