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30.06.1977

Publications

Microscopy of Cement Clinker: Picture Atlas

Verein Deutscher Zementwerke, VDZ, Ed. Microscopy of Cement Clinker: Picture Atlas. Duesseldorf: Bet.-Verl., 1977

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30.06.2019

Publications

Influences of the oxyfuel cooling medium on mineralogy and microstructure of Portland cement clinker

17th EMABM, University of Toronto, Toronto, Canada, May 20-23, 2019 Hrsg. Proceedings of the 17th Euroseminar on Microscopy Applied to Building Materials, Toronto (Canada), 20. to 23. May 2019

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09.01.2017

Publications

Alite Decomposition vs. Alite Corrosion

École Polytechnique Fédérale de Lausanne, EPFL, Hrsg. 16th Euroseminar on Microscopy Applied to Building Materials : EMABM 2017 (Les Diablerets 14.-17.May 2017). Lausanne: École Polytechnique Fédérale de Lausanne, EPFL, 2017, S.23-26

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09.01.2015

Publications

Evaluation of portland cement clinker with optical microscopy - case studies III

Copuroglu, Oguzhan (Hrsg): Proceedings of the 15th Euroseminar on microscopy applied to building materials (Delft 17.-19.06.2015). Delft, 2015, S.33-37

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09.01.2012

Publications

Effects of alternative fuels and raw materials on clinker properties

International Cement Microscopy Association, ICMA (Hrsg): Proceedings of the 34th international conference on cement microscopy (Halle/Saale 01.-04.04.2012). ICMA, 2012

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09.01.2011

Publications

Evaluation of portland cement clinker with optical microscopy - case studies II

13th Euroseminar on Microscopy Applied to Building Materials (Ljubljana 14.-18.06.2011). Ljubljana: Slovenian National Building and Civil Engineering Institute, 2011, 7 S.

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09.01.2009

Publications

Evaluation of portland cement clinker with optical microscopy - case studies

12th Euroseminar on Microscopy Applied to Building Materials: Full Paper (Dortmund 15.-19.09.2009). Dortmund: TU Dortmund, 2009, 10 S.

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The railway sleepers manufacturers, represented in the research project by the project partner PCM RAIL.ONE AG, are aiming to improve the life cycle assessment of their products. However, this improvement has to involve a constant production speed. Consequently, it would be necessary to use cements which combine life cycle benefits with rapid strength development and high durability. For this purpose, cements based on calcium sulfoaluminate (CSA cements) could be used. Their suitability for the production of precast concrete elements will be investigated in this research project using the example of "railway sleepers".

Work packages and methods

The research project will investigate whether the technical requirements for railway sleepers with CSA cements can be realised. Also, some basic links to standards (e.g. modulus of elasticity, creep and shrinkage in accordance with EC2) must be checked and ensured.

Essential requirements for the production of railway sleepers are the strengths to be achieved at an early age (24 h) and after 28 days. Demanding and clearly defined requirements are also placed on the fresh concrete properties and the temperature development during hardening. These properties will be investigated in the first project phase using CSA cements or a combination of CSA cements and Portland cement clinker based cements.

In the second project phase, the durability of the concretes with CSA cements or a combination of CSA cements and Portland cement clinker based cements as well as the creep and shrinkage of the concretes are investigated. The second phase of the project will be completed by practical trials with the project partner PCM RAIL.ONE AG as well as a life cycle assessment of the developed concretes.

Aim and purpose of the project

Railway sleepers are produced as precast concrete elements in a high-cycle manufacturing process. The “German Railway Standard (DBS) 918143” specifies CEM I 52,5 N for the production of sleepers. This is used, among other things, to achieve high early strengths after 24 hours. The production of 1 t Portland cement is emitting approx. 0.8 t of CO2. These emissions affect the life cycle assessment of railway sleepers.

Sponsors

The project of the research association VDZ non-profit GmbH - VDZ Technology gGmbH, Toulouser Allee 71, 40476 Duesseldorf, is funded by the German Federal Environment Foundation (DBU), AZ 34784/01.

Person to contact

Do you have any questions on this subject?

Dr Christoph Müller
Concrete technology

+49-211-45 78-351
bte@vdz-online.de

Thank you for your interest in our publication:

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