American Journal of Engineering and Applied Sciences

Application of Bio-Modified Montmorillonite Clay to Enhance Asphalt Oxidation Resistance

Shahrzad Hosseinnezhad, Elham H. Fini and Taher M. Abu-Lebdeh

DOI : 10.3844/ajeassp.2018.433.443

American Journal of Engineering and Applied Sciences

Volume 11, Issue 2

Pages 433-443

Abstract

This study evaluates the effectiveness of using a Bio-modified Nanoclay additive (BNC) to reduce the oxidative aging of asphalt pavements. The study results through X-Ray Diffraction analysis showed that the modification of montmorillonite clay with bio-modifier increased the basal d-spacing of clay. The resulting nanoclay with increased interlayer spacing was chosen for application in asphalt binder. Rheological characterization of clay-modified asphalt binder were studied before and after oxidation aging. The effects of BNC on asphalt complex modulus were observed to be prevailing in the intermediate to high-temperature range. The aging resistance of asphalt binder showed improvement with the addition of nanoclay and the improvement was more notable in presence of bio modified-nanoclay than pure clay.

Copyright

© 2018 Shahrzad Hosseinnezhad, Elham H. Fini and Taher M. Abu-Lebdeh. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.