Ziel des Forschungsvorhabens war es, den Einfluss von Nebenoxiden aus Brennstoffaschen auf die Bildungstemperaturen der Klinkerschmelze und auf die damit verbundene Klinkermineralogie herauszuarbeiten. Ebenso sollten die Auswirkungen der verringerten Prozesstemperatur und der veränderten Eigenschaften der Klinkerschmelze auf die notwendige Bildung von Coatingschichten sowie die Feuerfestkorrosion und damit auf die Haltbarkeit der feuerfesten Zustellung in der Sinterzone des Drehrohrofens aufgeklärt werden.

The purpose of the research project is to gain the first systematic scientific findings on spalling behaviour in the event of fire and on thermo-mechanical and thermo-physical properties for concretes with the new clinker-efficient cement types and with recycled aggregates.

The future of concrete recycling is taking shape here: through the targeted sequestration of CO₂ in demolition concrete, the project is investigating an innovative approach to improving the separation of aggregate and cement stone during demolition. The optimized separation of aggregate and hardened cement paste enables the recovery of valuable secondary materials and, thus, makes an important contribution to strengthening the circular economy in the construction sector in order to achieve sustainability goals.

The aim of the research project was to investigate the suitability of largely unutilised mineral secondary raw materials from the stone and earth industry as a resource-conserving and climate-friendly main cement constituent. The utilisation of calcined clays from secondary raw materials instead of conventional cement main constituents or high-quality primary clays can make an important contribution to the production of climate-friendly and resource-efficient cements. This means that the transformation process of the cement industry can be shaped in a way that is not only cli-mate-friendly but also resource-efficient.

This online seminar equips you with the knowledge and tools needed to systematically evaluate CO₂ capture technologies applied to industrial processes such as the clinker burning process. You will be introduced to the key benchmarking methodology and will learn how to assess technical performance, economic feasibility, and site-specific applicability in a structured way. Through practical examples and case studies, you will see how data-driven benchmarking can support informed decision-making on the path toward climate-neutral production.

As a participant in this course, you will receive a possibility to get acquainted with the state-of-the-art supervisory control and data acquisition system (SCADA) thanks to a realistic reconstruction of a production plant provided by SIMULEX®. The SIMULEX® cement plant simulator for training plant supervisors, foremen, production personnel, control room operators and young engineers was developed by KHD Humboldt Wedag AG in cooperation with VDZ. For over ten years VDZ has been using the simulator within the framework of training courses and has been continually supporting the further development of the system with practical input from the industry.

In this advanced seminar, you will look at the current challenges facing cement chemistry in terms of resource efficiency and climate neutrality. The focus will be on the use of alternative raw materials and fuels in clinker production. You will learn about the origin, composition and properties of these materials and understand their influence on the clinker burning process. You will also be introduced to modern methods of clinker analysis to assess the effect of alternative raw materials and fuels on cement properties. Finally, you will discuss the hydration behaviour of complex composite cements and quality assurance methods in a practical way.

The 9ᵗʰ International VDZ Congress took place in Düsseldorf on 6 – 8 November 2024. The VDZ Congress is the international scientific forum for the cement industry and its suppliers. Delegates from all over the world discuss the latest developments concerning the transformation of the industry on its way towards climate neutrality.