Datum
2023-12-06Schlagwort
600 Technik 660 Chemische Verfahrenstechnik, Technische Chemie AdsorptionBetonverflüssigerLigninEtherPolycarboxylateFluoreszenzmikroskopieMetadata
Zur Langanzeige
Aufsatz
Spatially resolved in situ analyses of the adsorption behavior of different admixtures on binders
Zusammenfassung
Admixtures play a key role in improving the performance of the cement paste matrix. A more efficient matrix can allow a reduction the binder content while maintaining the same properties. There is currently a lack of knowledge about the spatial distribution of admixtures in situ on binder surfaces which would facilitate the use of admixtures in general in inorganic binder systems. Imaging techniques such as confocal laser scanning microscopy (CLSM) and fluorescence microscopy can be used to study the spatiotemporal adsorption of superplasticizers and plasticizers on binder particles. However, in order to make the admixtures visible using these methods, they must first be coupled to a fluorescent molecule (staining). Different types of superplasticizers and plasticizers, including polycarboxylate ethers (PCE) and lignosulfonate (LS) were stained and tested. It was shown that not only adsorption but also desorption can be observed and that desorption cannot play a relevant
role in a binder system. The absence of desorption could be used to observe a real
system in permanent preparations, so that the adsorption on individual cement
grains could be followed in a time-dependent manner. The newly developed method
provides unprecedented insight into the adsorption of additives.
role in a binder system. The absence of desorption could be used to observe a real
system in permanent preparations, so that the adsorption on individual cement
grains could be followed in a time-dependent manner. The newly developed method
provides unprecedented insight into the adsorption of additives.
Zitierform
In: ce/papers Volume 6 / Issue 6 (2023-12-06) , S. 477-483 ; eissn:2509-7075Förderhinweis
Gefördert im Rahmen des Projekts DEALZitieren
@article{doi:10.17170/kobra-202401109346,
author={Kosenko, Denis and Wetzel, Alexander and Middendorf, Bernhard},
title={Spatially resolved in situ analyses of the adsorption behavior of different admixtures on binders},
journal={ce/papers},
year={2023}
}
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2024-01-10T09:15:53Z 2024-01-10T09:15:53Z 2023-12-06 doi:10.17170/kobra-202401109346 http://hdl.handle.net/123456789/15358 Gefördert im Rahmen des Projekts DEAL eng Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ superplasticizers confocal laser scanning microscopy lignosulfonate polycarboxylate ether fluorescence microscopy adsorption 600 660 Spatially resolved in situ analyses of the adsorption behavior of different admixtures on binders Aufsatz Admixtures play a key role in improving the performance of the cement paste matrix. A more efficient matrix can allow a reduction the binder content while maintaining the same properties. There is currently a lack of knowledge about the spatial distribution of admixtures in situ on binder surfaces which would facilitate the use of admixtures in general in inorganic binder systems. Imaging techniques such as confocal laser scanning microscopy (CLSM) and fluorescence microscopy can be used to study the spatiotemporal adsorption of superplasticizers and plasticizers on binder particles. However, in order to make the admixtures visible using these methods, they must first be coupled to a fluorescent molecule (staining). Different types of superplasticizers and plasticizers, including polycarboxylate ethers (PCE) and lignosulfonate (LS) were stained and tested. It was shown that not only adsorption but also desorption can be observed and that desorption cannot play a relevant role in a binder system. The absence of desorption could be used to observe a real system in permanent preparations, so that the adsorption on individual cement grains could be followed in a time-dependent manner. The newly developed method provides unprecedented insight into the adsorption of additives. open access Kosenko, Denis Wetzel, Alexander Middendorf, Bernhard doi:10.1002/cepa.2798 Adsorption Betonverflüssiger Lignin Ether Polycarboxylate Fluoreszenzmikroskopie publishedVersion eissn:2509-7075 Issue 6 ce/papers 477-483 Volume 6 false 2798
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