Abstract
The natural asphalts, of which Gilsonite is a representative, are modifiers used to increase the stiffness modulus of the asphalt concrete. For quality control purpose, recognizing if such material is present in the final blend is of an interest. The thin layer chromatography using a flame photometric detector (FPD), in addition to the typical flame ionization detector, was demonstrated hereby as a viable analytical tool for this problem. Gilsonite also contains the material soluble in solvent used in the development of the fraction referred to as aromatics. However, for straight run bitumen and Gilsonite the color of that fraction is different as well as their mobility. Due to the lower mobility of Gilsonite molecules on the stationary phase, the elution stops at different position than for fresh bitumen, convoluting the signal in the chromatogram region typically assigned for resins. The presence of Gilsonite is identifiable visually after the second development bath, but also with FPD from the final chromatogram.
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Change history
14 June 2019
The original version of the book was inadvertently published with incorrect information in chapter 38; the correction is given below. Page 243, text deleted in the fifth paragraph sixth line, ‘In the development, in so-called second bath, by nheptan/toluene (80:20% vol.)’ has been changed. Page 243, text added in the fifth paragraph sixth line, ‘In the development, in so-called second bath, by toluene/n-heptane (80:20% vol.)’ has been added. Page 244, text deleted in the third paragraph first line, ‘A series of 3 baths was prepared: (1) n-heptan – 30 min (9 cm), (2) nheptan/toluene (80:20% vol.)’ has been changed. Page 244, text added in the third paragraph first line, ‘A series of 3 baths was prepared: (1) n-heptan – 30 min (9 cm), (2) toluene/n-heptane (80:20% vol.)’ has been added.
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Makowska, M., Pellinen, T. (2019). Qualitative Detection of the Presence of Gilsonite in the Bituminous Blends Based on Thin Layer Chromatography. In: Poulikakos, L., Cannone Falchetto, A., Wistuba, M., Hofko, B., Porot, L., Di Benedetto, H. (eds) RILEM 252-CMB Symposium. RILEM 252-CMB 2018. RILEM Bookseries, vol 20. Springer, Cham. https://doi.org/10.1007/978-3-030-00476-7_38
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DOI: https://doi.org/10.1007/978-3-030-00476-7_38
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