Datum
2024-09-09Schlagwort
660 Chemische Verfahrenstechnik, Technische Chemie MikromechanikModellPhysikalisch-chemische EigenschaftAsphaltBitumenFT-IR-SpektroskopieMetadata
Zur Langanzeige
Aufsatz
Use of multivariate clustering analysis to investigate the physicochemical interactions in bitumen mastics using micromechanical modeling and FTIR spectroscopy
Zusammenfassung
The debate continues regarding whether different mineral fillers and asphalt technologies mitigate or accelerate aging formation in bituminous mastics. Hence, this study was centered on investigating the concurrent impact of aging stages, mineral composition of filler components (e.g., limestone, basalt, and diabase), and asphalt binder technology on the formation and evolution of physicochemical interactions in bituminous mastics. Various bituminous mastics at different aging stages were analyzed using rheological oscillatory testing and Attenuated Total Reflectance Fourier Transform Infrared spectroscopy (ATR-FTIR) measurements to study their chemical characteristics. A generalized self-consistent scheme (GSCS) and Hashin micromechanical models were utilized to estimate immobilized binder volume and adsorbed binder thickness values from rheological data. Additionally, aging-related indices such as carbonyl and sulfoxide indices were calculated from FTIR-ATR results. In addition to the typical comparison of these results, a multivariate clustering approach was employed, comprising Partial Least-Square Regression (PLSR) as a dimensionality reduction protocol and Hierarchical Clustering Analysis (HCA) as a clustering technique. This approach segregated the mastics into four distinct clusters without prior knowledge of their labels. The clustering results grouped variants with similar physicochemical attributes in specific clusters, revealing the mitigating role of various filler types based on the dominant components of each cluster. Based on the physicochemical results obtained from the clustering analysis, limestone filler is expected to play a more significant mitigating role in foamed bitumen mastics, helping to alleviate the effects induced by aging protocols.
Zitierform
In: Construction and Building Materials Volume 448 (2024-09-09) eissn:1879-0526Förderhinweis
Gefördert im Rahmen des Projekts DEALZitieren
@article{doi:10.17170/kobra-2024092310872,
author={Motevalizadeh, Seyed Mohsen and Mollenhauer, Konrad},
title={Use of multivariate clustering analysis to investigate the physicochemical interactions in bitumen mastics using micromechanical modeling and FTIR spectroscopy},
journal={Construction and Building Materials},
year={2024}
}
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2024-10-04T12:34:44Z 2024-10-04T12:34:44Z 2024-09-09 doi:10.17170/kobra-2024092310872 http://hdl.handle.net/123456789/16078 Gefördert im Rahmen des Projekts DEAL eng Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ micromechanical modeling physicochemical interactions adsorbed interphase layer warm mix asphalt foamed bitumen 660 Use of multivariate clustering analysis to investigate the physicochemical interactions in bitumen mastics using micromechanical modeling and FTIR spectroscopy Aufsatz The debate continues regarding whether different mineral fillers and asphalt technologies mitigate or accelerate aging formation in bituminous mastics. Hence, this study was centered on investigating the concurrent impact of aging stages, mineral composition of filler components (e.g., limestone, basalt, and diabase), and asphalt binder technology on the formation and evolution of physicochemical interactions in bituminous mastics. Various bituminous mastics at different aging stages were analyzed using rheological oscillatory testing and Attenuated Total Reflectance Fourier Transform Infrared spectroscopy (ATR-FTIR) measurements to study their chemical characteristics. A generalized self-consistent scheme (GSCS) and Hashin micromechanical models were utilized to estimate immobilized binder volume and adsorbed binder thickness values from rheological data. Additionally, aging-related indices such as carbonyl and sulfoxide indices were calculated from FTIR-ATR results. In addition to the typical comparison of these results, a multivariate clustering approach was employed, comprising Partial Least-Square Regression (PLSR) as a dimensionality reduction protocol and Hierarchical Clustering Analysis (HCA) as a clustering technique. This approach segregated the mastics into four distinct clusters without prior knowledge of their labels. The clustering results grouped variants with similar physicochemical attributes in specific clusters, revealing the mitigating role of various filler types based on the dominant components of each cluster. Based on the physicochemical results obtained from the clustering analysis, limestone filler is expected to play a more significant mitigating role in foamed bitumen mastics, helping to alleviate the effects induced by aging protocols. open access Motevalizadeh, Seyed Mohsen Mollenhauer, Konrad doi:10.1016/j.conbuildmat.2024.138230 Mikromechanik Modell Physikalisch-chemische Eigenschaft Asphalt Bitumen FT-IR-Spektroskopie publishedVersion eissn:1879-0526 Construction and Building Materials Volume 448 false 138230
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