Report 1/09 – www.kaeser.com 12 With gravel and concrete works in the Stuttgart, Karlsruhe und Weil-Lörrach regions, Holcim Süddeutschland’s core business is the production of ce- ment, gravel and concrete. The Dottern- hausern cement works were founded in 1939 by Rudolf Rohrbach, and were later run by his son, Gerhard Rohrbach, until the business merged with Holcim (Süddeutschland) GmbH in 2004. The raw materials for the works are source

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