Structural and chemical imaging analysis of bitumenShow others and affiliations
2021 (English)In: International Journal on Road Materials and Pavement Design, ISSN 1468-0629, E-ISSN 2164-7402, Vol. 22, no 4, p. 852-870Article in journal (Refereed) Published
Abstract [en]
Microstructures of bitumen surfaces (both air-cooled and fractured) were imaged by atomic force microscopy (AFM) and chemically characterised by time-of-flight secondary ion mass spectrometry (TOF-SIMS). For certain air-cooled bitumen surfaces, bee structures were observed by AFM, and chemical explanation by wax crystallisation was confirmed by TOF-SIMS analysis. Unlike the air-cooled surfaces, the fracture surfaces generally did not show clear structure patterns. Furthermore, TOF-SIMS analysis was conducted on the tube-like or worm structures which were generated by environmental scanning electron microscopy (ESEM) on the bitumen surfaces. In general, very small chemical differences were observed between the structured and unstructured areas, as well as between different areas of the structure. To understand the formation of the ESEM structures, possible contributing factors were examined, from which a mechanism involving electron-induced heating was proposed.
Place, publisher, year, edition, pages
Taylor and Francis Ltd. , 2021. Vol. 22, no 4, p. 852-870
Keywords [en]
AFM, bitumen, ESEM, microstructure, TOF-SIMS, wax, Atomic force microscopy, Bituminous materials, Cooling systems, Organic polymers, Scanning electron microscopy, Secondary ion mass spectrometry, Waxes, Contributing factor, Environmental scanning electron microscopies (ESEM), Fracture surfaces, Time of flight secondary ion mass spectrometry, ToF SIMS, TOF-SIMS analysis, Chemical analysis
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-39930DOI: 10.1080/14680629.2019.1661274Scopus ID: 2-s2.0-85071732430OAI: oai:DiVA.org:ri-39930DiVA, id: diva2:1352808
2019-09-192019-09-192023-06-05Bibliographically approved