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Research projects

Knowledge transfer


Completed

BetonQuali - information and qualification platform

"BetonQuali - information and qualification platform", a joint project of VDZ gGmbH and its project partners, aimed to develop and test a training method for semi-skilled and unskilled employees in the concrete industry.

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Current

Increasing energy efficiency in the cement industry through training by means of virtual reality (VR)

The aim of IGF project 21619 is to develop a training simulator with which learners can independently solve typical process engineering tasks within a virtual reality (VR) environment, particularly in connection with ball mills.

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Current

Reduction of green house gases by process innovations in the primary Industry, SP 6: Development of a methodology for cross-project and ecological potential assessment, cement industry

The transfer and networking project ReInvent aims to provide technical and organisational support for the BMBF funding measure KlimPro-Industrie.

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Cement production


Current

Optimisation of clinker-efficient cements by means of multimodal particle size distributions using energy-efficient products from separate ultra-fine grinding

Separate ultra-fine grinding of cement - Energy-efficient grinding meets optimised cement and concrete properties. Today, future-oriented cements can already be produced more sustainably and efficiently by using various components of different finenesses.

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Current

FlashPhos: The complete thermochemical recycling of sewage sludge

Elemental white phosphorus (P4) is indispensable for key industries such as in the food and pharmaceutical sectors and is therefore a strategic raw material of high relevance. In the FlashPhos project, the sustainable production of white phosphorus using sewage sludge will be demonstrated on a large scale.

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Current

Optimisation of energy demand and product quality during grinding in the cement industry through the use of ceramic grinding media

The aim of the IGF project 21791 N is to better understand the influence of ceramic grinding media (balls) on the comminution process and the product quality during cement grinding in ball mills. The data will serve as a basis for designing and predicting the energy requirements and behaviour of grinding plants when using ceramic grinding media.

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Current

Use of hydrogen in the calciner of rotary kiln plants to reduce CO₂ emissions in the cement industry

The main objective of the research project is to investigate both technically and economically the application of hydrogen in the calciner in the cement production process for the first time.

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Current

Reduction of green house gases by process innovations in the primary Industry, SP 6: Development of a methodology for cross-project and ecological potential assessment, cement industry

The transfer and networking project ReInvent aims to provide technical and organisational support for the BMBF funding measure KlimPro-Industrie.

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Current

Optimisation and evaluation of process chains for chemical CO₂ utilisation for the emission reduction in the cement industry

To meet the ambitious climate protection targets by 2050, so-called CCUS technologies are required. In addition to CO₂ storage, the combination of CO₂ and hydrogen management offers the possibility of producing usable products. The combination of capture methods and methods of CO₂ utilisation results in a variety of possible process chains, the optimum of which depends on site-specific boundary conditions. The project analyses possible pathways in order to develop a supporting tool for strategy development for specific sites.

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Concrete technology


Current

Durability of concretes with clinker-efficient cements CEM II/C and CEM VI

EN 197-5 defined the clinker-efficient cements CEM II/C and CEM VI. Technical approvals for the application of CEM II/C cements have been issued. For a wide application, all parties involved have to develop confidence in the new products. With new findings on fresh concrete properties, hardening behaviour and durability two research projects of the VDZ Concrete Technology Department will provide an important basis for the application of these cements in the construction industry.

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Current

Fresh concrete properties and hardening behaviour of concretes with clinker-efficient cements CEM II/C and CEM VI

EN 197-5 defined the clinker-efficient cements CEM II/C and CEM VI. Technical approvals for the application of CEM II/C cements have been issued. For a widespread application, it is important that all parties involved develop confidence in the new products. With new findings on fresh concrete properties, hardening behaviour and durability two research projects of the VDZ Concrete Technology Department will provide an important basis for application of these cements in concrete for the construction industry.

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Current

Durability of concrete according to the performance principle - classification of material resistance, production control (PC), conformity criteria and control (CC)

In this project, the systematic classification of the carbonation and chloride penetration resistance of concretes will be investigated. Based on these results, recommendations for action will be derived for production and conformity control within the framework of a performance-based durability concept.

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Current

Reduction of green house gases by process innovations in the primary Industry, SP 6: Development of a methodology for cross-project and ecological potential assessment, cement industry

The transfer and networking project ReInvent aims to provide technical and organisational support for the BMBF funding measure KlimPro-Industrie.

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Current

Recycled clay brick containing materials as a raw material in resource efficient cements and durable concretes

The topic of the research project is the utilisation of brick-containing materials from the recycling of mineral construction waste. It is being investigated whether and how resource-efficient cements can be produced with processed brick-containing construction waste and reduced clinker content, thus reducing process-related CO₂ emissions.

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Current

LeptoCalc

The use of fines from concrete recycling plants as cement constituents is currently insufficiently investigated and requires further research. The basic prerequisite for the utilisation of the fines will be to be able to characterise the material properties as quickly and comprehensively as possible and to ensure a constant material flow. An essential part of the research project is therefore the development of a rapid test method with which the properties of these fines can be estimated, among other things, by measuring the residual reactivity.

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Chemistry and mineralogy


Current

Clinker burning with alternative fuels at low process temperatures - effects on coating formation and on the corrosion of refractory products in the cement rotary kiln as well as on the performance of cement

The replacement of primary fuels by alternative fuels is of great economic and ecological importance for the cement industry and is to be increased in the future. The fuel ashes are used as raw material in the cement clinker and influence its properties as well as the coating formation on the refractory lining in the kiln. Exact knowledge of these effects is indispensable for the further increase of the alternative fuel rate and the simultaneous optimisation of the kiln operation as well as for the maintenance of the clinker quality and the service life of the refractory lining.

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Current

Calcined Clays from mineral secondary raw materials

The aim of the research project is to investigate the suitability of previously largely unused mineral secondary raw materials from the stone and earth industry as a resource-conserving and climate-friendly main cement constituent. The use of cal-cined clays from secondary raw materials instead of conventional main cement constituents or high-quality primary clays can make an important contribution to the production of climate-friendly and resource-efficient cements.

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Current

Use of X-ray fluorescence analysis to determine trace element contents in cements

The aim of the research project is to develop a procedure for analysing trace elements on cements using X-ray fluorescence analysis. In addition, precision data and application limits are to be determined, which are essential in order to be able to classify the results.

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Current

Resource-efficient use of sulphate-containing process dusts for sulphate optimisation using isothermal heat flow calorimetry

The research project analyses whether sulphate-rich process dusts can be used to optimise the sulphate content of cements, thereby saving anhydrite/gypsum and, in particular, improving the early strength of cements with several main constituents. Furthermore, it is to be determined whether isothermal heat flow calorimetry can be used as a fast and cost-effective investigation method for this purpose.

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Current

Interactions of accelerating admixtures and clinker-efficient cements with several main constituents to improve the early compressive strength of concrete

The acceptance of resource-efficient cements with significantly reduced specific CO₂ emissions is still too low in construction practice. The main reason for this is that early strength is not high enough for economical production processes and also competitive construction with concrete. Accelerating admixtures can improve the early strength of concrete. The research project investigates interactions between concrete admixtures that accelerate the strength development and cements with several main constituents.

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Current

Influences of two-stage mixing on the hydration behaviour of Portland-composite cements and composite cements as well as on the concrete performance

The acceptance of resource-efficient cements with significantly reduced specific CO₂ emissions is still too low in construction practice. The main reason is that the early strength is not high enough for economical production processes and competitive construction with concrete. The research project is investigating the extent to which more intensive mixing and further cement constituents besides clinker increase the mixing energy input and can increase the early cement hydration and thus the strength development.

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