Results (German): Investigations on the internal particle size distribution of main constituents of Portland composite and composite cements

16.12.2021

Publications

Education and Training Programme 2022/23

VDZ's Education and Training Programme 2022/23 ranges from the teaching of technical basics to the imparting of special technical knowledge and education courses for managers. VDZ offers individual, tailor-made seminars on the topics of clinker and cement production, maintenance, quality assurance, environmental protection and concrete technology. Almost all seminars can also be designed and implemented as inhouse seminars according to individual customer requirements. More about the training programme 2022/23 and registration at: https://vdz.info/5c78h

15.07.2021

Publications

Education and Training Programme 2021/22

With its "Education and Training Programme 2021/22" VDZ supports the efforts of the industry to be successful in the long term through consistent qualification of the workforce. VDZ ensures efficient and practical learning by providing a wide range of vocational training courses and (online) seminars covering technical basics, special technical knowledge and education courses for managers.

01.05.2021

Publications

Investigations on the influence of sand and testing conditions on the expansion behaviour of concretes in ASR tests

Lopes Batista, António; Santos Silva, António; Fernandes, Isabel; Oliveira Santos, Luís; Custódio, Joao; Serra, Carlos, Hrsg. Proceedings of the 16th International Conference on Alkali-Aggregate Reaction in Concrete: Volume I (Lissabon 2021-2022.) Lissabon, 2021, S.631-641

01.05.2021

Research projects

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.

01.04.2021

Research projects

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.

04.11.2020

Publications

Results: Cement chemical optimisation of cements containing fly ash

This publication is just available in German.

01.10.2020

Research projects

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.

01.10.2020

Research projects

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.

01.08.2020

Research projects

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.

09.01.2020

Publications

Background radiation from concrete: Exposure to radiation from cement-bonded construction materials is not dangerous