Investigation of Sequential Dissolution of Asphalt Binder in Common Solvents by FTIR and Binder Fractionation
Publication: Journal of Materials in Civil Engineering
Volume 27, Issue 8
Abstract
An investigation into the potential for sequential dissolution of asphalt fractions in a staged extraction scenario was conducted for common asphalt solvents. Asphalt cement subjected to six sequential washes in trichloroethylene (TCE), tetrahydrofuran (THF), toluene, or decahydronaphthalene (decalin) were evaluated using Fourier-transform infrared spectroscopy (FTIR) and fractionated for asphaltene content. The results from the FTIR were evaluated statistically using a one-way ANOVA test and the solvents induced no difference in mean carbonyl index. However, the fractionation of the asphalt cement after staged extraction showed that decalin and THF sequentially dissolved the asphalt cement while toluene remained suspect. Trichloroethylene does not appear to sequentially dissolve the asphalt cement fractions. The findings are in agreement with solubility calculations based on Hansen solubility parameters.
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Acknowledgments
The writers would like to thank Dr. Troy Pauli of the Western Research Institute for research input. Additionally, the writers would like to thank the Tennessee DOT and the United States DOT Dwight D. Eisenhower Transportation Fellowship for their support of the research reported in this paper.
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Published In
Journal of Materials in Civil Engineering
Volume 27 • Issue 8 • August 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jan 25, 2014
Accepted: Sep 15, 2014
Published online: Oct 17, 2014
Discussion open until: Mar 17, 2015
Published in print: Aug 1, 2015
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