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Title
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A comparative study of bitumen microscale morphology using atomic force microscopy and laser scanning confocal microscopy
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Author
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Abstract
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| Bituminous binders can display a rich microscale morphology, including the so-called bee structures. In literature, a strong relationship has been observed between the presence of paraffin wax crystals and the appearance of bee structures, mainly by using Atomic Force Microscopy (AFM) measurements. The most common AFM testing mode is the tapping mode, and although this is described as a non-contact measuring method accidental collisions between the vibrating cantilever nanotube and the bitumen surface can occur. Additionally, the AFM tapping mode is only applicable when the viscosity of the specimens is high enough, which is highly dependent on the environmental temperature. In this research, a Laser Scanning Confocal Microscope (LSCM) is evaluated for its capability to investigate the microscale morphology of five bitumen, including so-called bee structures, and compared to the observations made with the AFM technique. |
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Language
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English
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Source (book)
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9th European Asphalt Technology Association (EATA) Conference, June 7-9, 2021, Vienna, Austria
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Publication
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2021
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Volume/pages
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p. 1-18
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Medium
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E-only publicatie
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Full text (open access)
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