Zemente mit mehreren Hauptbestandteilen im Betonbau

Cements with Several Main Constituents in Concrete Construction – Sustainable Solutions for Building with Concrete In view of the reduction of climate‐related CO₂ emissions in the cement industry the manufacture of cements with several main constituents is of particular significance. One reason is the production process, which is more energy‐efficient and more ecological compared to “traditional” CEM I‐cements (Portland cements). But also the durability and performance in their use in concrete constructions are reasons why Portland‐composite cements (CEM II) and blastfurnace cements (CEM III) have meanwhile reached a market share of about 65% in Germany. For a few years now, approximately only 30% Portland cements have been used throughout Europe – with a continuous downward trend. The application‐specific properties, the possible areas of use as well as the ecologic advantages of the cements with several main constituents used in Germany so far are described in the following and illustrated by two practical examples. An outlook into possible further developments is given by examples of the performance of new cements in concrete.