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Structural characterization of the main binding phase in cement – the key component in making green concrete

PhD defense, Friday 9 April 2021, Sheng-Yu Yang

2021.04.09 | Mie Meulengracht Christensen

Sheng-Yu Yang

During his PhD studies, Sheng-Yu Yang has analyzed the atomistic structure of the main hydration product of Portland cement using solid-state NMR spectroscopy as the main characterization tool. As one of the most manufactured products in the World, cement is responsible for about 8% of the anthropogenic CO2 emissions. This amount may be effectively reduced via partial replacement of Portland cement with alumino-silica rich supplementary cementitious materials. This replacement will affect the structure of the principal hydration product, the ‘glue’ in concrete, the so-called calcium-silicate-hydrate phase. Sheng-Yu Yang has studied how aluminum influences the composition and atomic structure of this main hydrate phase and how this phase evolves under long term storage. The findings from this research contribute to our understanding of the uptake and location of aluminum in the calcium-silicate-hydrate phase, which is important for the development of novel cement blends with low CO2 footprint.

The PhD study was completed at Interdisciplinary Nanoscience Center (iNANO), Faculty of Natural Sciences, Aarhus University.

This summary was prepared by the PhD student.

Time: Friday, 9 April 2021 at 13:15
Place: The PhD defense will be held online.
To receive a link to the event, please send an e-mail to Jørgen Skibsted, jskib@chem.au.dk
Title of PhD thesis: Structural Characterization of Calcium Alumino-Silicate Hydrate (C-A-S-H) Phases by Solid-State NMR Spectroscopy
Contact information: Sheng-Yu Yang, e-mail: syyang@inano.au.dk, tel.: +45 81927150
Members of the assessment committee:
Professor Gwenn Le Saoût, Institut Mines Telecom (IMT), Mines Alès and Montpellier University, France
Professor Michael Ryan Hansen, Institut für Physikalische Chemie, University of Münster, Germany
Associate Professor Frans Mulder (chairman), iNANO and Department of Chemistry, Aarhus University, Denmark
Main supervisor:
Associate Professor Jørgen Skibsted, iNANO and Department of Chemistry, Aarhus University, Denmark
Language: The PhD dissertation will be defended in English

The defense is public.

Due to the coronavirus situation, the PhD thesis will not be available for reading at the offices of the PhD administration. Instead, interested parties may send an e-mail to gradschool.nat@au.dk to receive a digital copy of the PhD thesis. Please note, it may in certain cases be necessary to make an individual arrangement to read the PhD thesis.

PhD defence
16882 / i43