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  4. Quantitative analysis of the strength generating C-S-H-phase in concrete by IR-spectroscopy
 
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Quantitative analysis of the strength generating C-S-H-phase in concrete by IR-spectroscopy

Citation Link: https://doi.org/10.15480/882.4358
Publikationstyp
Journal Article
Date Issued
2022-03-03
Sprache
English
Author(s)
Schmidt-Döhl, Frank  orcid-logo
Schulenberg, David 
Tralow, Franziska  
Neubauer, Jürgen  
Wolf, Julian  
Ectors, Dominique  
Institut
Baustoffe, Bauphysik und Bauchemie B-3  
TORE-DOI
10.15480/882.4358
TORE-URI
http://hdl.handle.net/11420/12762
Journal
Acta polytechnica  
Volume
33
Start Page
539
End Page
545
Citation
Acta polytechnica 33: 539-545 (2022)
Contribution to Conference
3rd International Conference on Concrete Sustainability, ICCS 2021  
Publisher DOI
10.14311/APP.2022.33.0539
Scopus ID
2-s2.0-85130308745
Publisher
Czech Technical University
The C-S-H-phase is the most important strength generating phase in concrete and other cementitious materials. The analysis of C-S-H is therefore an important instrument of innovations in the field of concrete and its durability and sustainability. The quantification and insights in C-S-H are hindered by the predominantly amorphous structure of C-S-H. Only the time consuming and expensive solid state nuclear magnetic resonance spectroscopy (NMR) gives a chance to get results, but is restricted to model substances. A new technique, based on the cheap and widespread infrared-spectroscopy (IR) was developed. The quantitative analysis is based on the silicon content in the different structural units of C-S-H and a calibration with natural and synthetic materials with known silicon content in these units. The technique allows to investigate specimens from real structures. Specimens with quartz or limestone aggregate can be analyzed directly. In other cases the aggregates must be separated, for example with heavy liquid separation. Tests with different mortars showed a good correspondence of measured and expected values of C-S-H concentration.
Subjects
Calcium-Silicate-Hydrate (C-S-H)
quantitative analysis
spectroscopy
DDC Class
690: Hausbau, Bauhandwerk
720: Architektur
Funding Organisations
Deutsche Forschungsgemeinschaft (DFG)  
More Funding Information
This work was supported by the Deutsche Forschungsgemeinschaft [grant number 280067300].
Publication version
publishedVersion
Lizenz
https://creativecommons.org/licenses/by/4.0/
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