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Dyckerhoff presents BLUE STAR, the CO2-reduced white cement

Published by , Assistant Editor
World Cement,

On 20 – 22 June Dyckerhoff presented its newly developed low-carbon cement Dyckerhoff Weiss BLUE STAR  during the Ulm Concrete Days. This pozzolan cement was approved by the VDZ in mid-June with the standard designation CEM IV/A (P) 42.5 R and has since been included in the delivery program of the Amöneburg plant. Compared to CEM I cements, around 15% less CO2 is released during the production of Dyckerhoff Weiss BLUE STAR.

Dyckerhoff's expert team have been working on alternative input materials for white cement production for some time in order to reduce the CO2 footprint. In addition to limestone powder, natural pozzolan in particular proved to be suitable input materials to replace clinker. These are composed of silica, alumina, limestone and alkalis. The interaction of the silicic acid with calcium hydroxide (cement) and water leads to a pozzolanic reaction.

For more than 90 years, Dyckerhoff WEISS has been giving new impetus to building and designing with concrete. By differentiating the types of cement it is possible to offer cement solutions for the optimal operation of various application. For example, types of cement with a higher fineness and thus higher performance (52.5) were provided, which optimise the cement content in the customer recipes through the use of different fillers.

Solutions are now being developed that will also transfer white cement to a CO2-efficient future while maintaining the product's well known brightness levels.

For further information and a table with characteristic parameters, click here.

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This article has been tagged under the following:

European cement news Concrete news Cement news 2018