THE EFFECT OF ASPHALT COMPOSITION ON THE FORMATION OF ASPHALTENES AND THEIR CONTRIBUTION TO ASPHALT VISCOSITY
- 1 January 1996
- journal article
- research article
- Published by Taylor & Francis in Fuel Science and Technology International
- Vol. 14 (1-2), 139-162
- https://doi.org/10.1080/08843759608947566
Abstract
Interactions among asphalt components have significant effects on the performance of asphalt binder. To understand those interactions, four asphalts, SHRP AAA-I, AAD-I, AAF-I, and AAG-I, were fractionated into three generic fractions according to Corbett's procedure and reblended into asphaltenes/aromatics/saturates ternary mixtures in various ratios. Mixtures were oxidatively aged with atmospheric air at temperatures of 87.7, 93.3, and 98.8°C for 5 to 33 days. The changes in chemical composition and physical properties were monitored using fourier transform infrared spectroscopy (FT-IR) and dynamic mechanical rheometry The formation of asphaltenes is a major factor in the hardening of asphalt with aging. The data collected in this study indicate that the saturate content in the maltene phase has a profound impact on the contribution that asphaltenes have on the viscosity of aged asphalt. The data also suggest that the aromatics fraction is solely responsible for the formation of asphaltenes as an asphalt oxidizes.Keywords
This publication has 8 references indexed in Scilit:
- APPLICATION AND USE OF THE ATR, FT-IR METHOD TO ASPHALT AGING STUDIESFuel Science and Technology International, 1992
- Rheological properties of vacuum residue fractions in organic solventsFuel, 1991
- Viscosity/Concentration Relationships for EmulsionsJournal of Rheology, 1989
- Determination of oxygen in molten alkali halides salts by proton activation analysisAnalytical Chemistry, 1986
- The Effect of Asphaltenes on Asphalt ViscosityProduct R&D, 1975
- Weathering of Asphalts as Characterized by Infrared Multiple Internal Reflection SpectraApplied Spectroscopy, 1973
- Composition of asphalt based on generic fractionation, using solvent deasphaltening, elution-adsorption chromatography, and densimetric characterizationAnalytical Chemistry, 1969
- The Colloidal Structure of Asphalt.The Journal of Physical Chemistry, 1949