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Comparative Study of 2D Petrographic and 3D X-ray Tomography Investigations of Air Voids in Asphalt

Middendorf, Moritz ; Umbach, Cristin ; Böhm, Stefan ; Liu, Jia ; Middendorf, Bernhard (2023)
Comparative Study of 2D Petrographic and 3D X-ray Tomography Investigations of Air Voids in Asphalt.
In: Materials, 2023, 16 (3)
doi: 10.26083/tuprints-00023345
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Comparative Study of 2D Petrographic and 3D X-ray Tomography Investigations of Air Voids in Asphalt
Language: English
Date: 10 November 2023
Place of Publication: Darmstadt
Year of primary publication: 2023
Place of primary publication: Basel
Publisher: MDPI
Journal or Publication Title: Materials
Volume of the journal: 16
Issue Number: 3
Collation: 14 Seiten
DOI: 10.26083/tuprints-00023345
Corresponding Links:
Origin: Secondary publication DeepGreen

Knowledge of the exact composition of building materials (aggregate, binder, air voids, etc.) is essential for the further development of more resistant and sustainable building materials. In numerous scientific studies, the material behavior of asphalt is tested using mechanical methods. Here, the overall material behavior is determined (bitumen, air voids, aggregate). With the advent of imaging techniques, it is becoming possible to determine the individual constituents separately and perform a more detailed analysis of their location, shape and composition. Three-dimensional and two-dimensional methods are available for this purpose. For this study, two different types of asphalt (porous asphalt and asphalt concrete) were analyzed using 3D X-ray computed tomography and asphalt petrology as 2D methods; the results of both investigations are compared. The objective of this study is to determine whether the 2D method provides suitable results for the microstructural analysis of asphalt samples and how the results differ from those studied by the 3D method. The comparison shows that both methods can be used to analyze voids in asphalt samples. The 2D method provides valuable insight into the distribution of voids in a sample. In addition to the distribution of voids within a 2D section, the 2D method can also be used to make some structural statements about the location and structure of the voids in the 2D plane. The X-ray computed tomography method allows more complex analyses of the pore structure because of the third direction (3D). In addition, the 3D method provides more data, so that the pore structure can be described even more precisely, and the pore size (length, width, height) can be mapped and analyzed with a high degree of accuracy.

Uncontrolled Keywords: asphalt, void structure, imaging techniques, computer tomography, asphalt petrology
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-233457
Additional Information:

This article belongs to the Section Construction and Building Materials

Classification DDC: 600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
600 Technology, medicine, applied sciences > 624 Civil engineering and environmental protection engineering
Divisions: 13 Department of Civil and Environmental Engineering Sciences > Institutes of Transportation > Transportation Infrastructure Engineering
Date Deposited: 10 Nov 2023 15:36
Last Modified: 15 Nov 2023 13:11
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/23345
PPN: 513153527
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