The Effect of Nano Materials on the Rheological Properties of Asphalt Binder
Received: 28 December 2024 | Revised: 14 January 2025 | Accepted: 25 January 2025 | Online: 24 February 2025
Corresponding author: Rana A. Yousif
Abstract
This study investigates the effects of nano-silica, nano-chitosan, and nano-clay as asphalt binder modifiers, focusing on their physical and rheological properties. The nanomaterials were incorporated at concentrations of 2.5%, 5.0%, 7.5%, and 10% by weight. This research was driven by the growing adoption of nanomaterials, many of which are known for their toxicity and environmental impact. The results demonstrated a significant improvement in both physical and rheological properties, particularly in rutting resistance. Nano-silica demonstrated the greatest enhancement, leading to a reduction in permeability values, an increase in softening point, viscosity, and overall resistance to permanent deformation. Nano-chitosan exhibited a similar trend but with slightly lower performance values than nano-silica. Nano-clay provided the least improvement, though it still contributed to increased asphalt binder stiffness and reduced temperature sensitivity. Overall, the findings confirm that nano-silica, nano-chitosan, and nano-clay can improve asphalt binder properties, extending pavement lifespan and performance under increasing traffic demands. Further studies are recommended to explore the long-term aging resistance, fatigue behavior, and field applications of these nanomaterial-modified asphalt binders.
Keywords:
nano materials, chitosan, nano silica, nano clay, physical properties, rheological propertiesDownloads
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