Print Email Facebook Twitter Evaluation of chemical composition and physical properties of bituminous binders and fractions Title Evaluation of chemical composition and physical properties of bituminous binders and fractions Author Apostolidis, P. (TU Delft Pavement Engineering) Porot, Laurent (Kraton Chemical B.V.) Date 2023 Abstract Bituminous binders are foreseen as colloidal dispersed systems characterised by high chemical complexity containing a plethora of molecules classified into maltenes and asphaltenes. The effect of these fractions on the overall response of bituminous binders remains elusive. This research selected two binders from the same refinery but with different paving grades. First, Dynamic Shear and Bending Beam Rheometers were employed to assess their rheological properties, and results were consistent with the physical measurements conducted on binders to address low to high temperature rheological response. Then, the binders and their fractions were individually analysed in a Fourier transform infrared spectroscopy and differential scanning calorimetry to elucidate their chemistry associated with the structural changes. No significant difference could be noticed in the infrared spectra of binders, even if they displayed diverse physical properties. Differences may be identified in asphaltenes, an observation which is also supported by calorimetric measurements where steric hindrance occurred upon heating. Maltenes contributed significantly to the glass transition of both binders, while the impact of asphaltenes on the heat capacity changes in glass transition was limited. The findings from this research could be used to establish a new analytical approach for bituminous binders to understand the differences in the physical properties of binders based on their chemistry. Subject bitumenbinderasphaltdynamic shear rheometerFourier transform infrareddifferential scanning calorimetry To reference this document use: http://resolver.tudelft.nl/uuid:d7bc69d4-1a8d-4696-8536-815411b389e8 DOI https://doi.org/10.1080/14680629.2023.2194428 ISSN 1468-0629 Source Road Materials and Pavement Design, 25 (1), 68-80 Part of collection Institutional Repository Document type journal article Rights © 2023 P. Apostolidis, Laurent Porot Files PDF Evaluation_of_chemical_co ... ctions.pdf 2.91 MB Close viewer /islandora/object/uuid:d7bc69d4-1a8d-4696-8536-815411b389e8/datastream/OBJ/view