Bitumen morphologies by phase-detection atomic force microscopy

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DOIResolve DOI: http://doi.org/10.1111/j.1365-2818.2006.01540.x
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TypeArticle
Journal titleJournal of Microscopy
Volume221
IssueJanuary 1
Pages1729; # of pages: 13
SubjectAFM, PDM, bitumen, asphalt, structure, microscopy, phases, composition, vanadium, nickel, metals, cations; Nanotechnology; Roads/Pavement; Roads
AbstractBitumen is a complex mixture of hydrocarbons for which the knowledge of microstructure is incomplete. In an effort to detail this microstructure, thirteen bitumens were analyzed by phase detection atomic force microscopy. Based on morphology, the bitumens could be classified into three distinct groups. One group showed fine domains down to 0.1 ìm, another showed domains of about 1 ìm, and a third group showed up tofour different domains or phases of different sizes and shapes. No correlation was found between the AFM morphology and the composition based on asphaltenes, polar aromatics, naphthene aromatics and saturates. A good correlation was found between the area of the ?bee-like? structures and the vanadium and nickel content in bitumen, and a good correspondence was found between the AFM groups and the average size of molecular planes made of fused aromatics. The morphology and the moleculararrangements in bitumen thus appear partly governed by the molecular planes and the polarity defined by metallic cations.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number48157
17497
NPARC number20377299
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Record identifier2acb275e-4e99-4e9a-a358-37a1c8f19827
Record created2012-07-24
Record modified2016-05-09
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