Evaluation of the Performance of Asphalt Binder Modified With Nanoparticles by Shaban Ismael Albrka in TCEIA - Lupinepublishers
The physical and rheological properties of asphalt binder have been characterized using the conventional tests; (penetration, ductility, and softening point) and dynamic shear rheometer (DSR). In this study, Calcium Carbonate nanoparticles (CaCO3) and Aluminum hydro oxide (Al2O3) nanoparticles have been added to the base asphalt with a concentration of 3, 5 and 7% by the weight of asphalt. It was found that the addition of CaCO3 and Al2O3 content has a significant effect on the physical properties of the asphalt, as the penetration reduced up to 50% for modified asphalt with CaCO3 and 64% for modified asphalt with Al2O3. The softening point of modified asphalt binders was increased up to 11 and 12% for both modifiers respectively compared with the base asphalt binder. Also, the results showed that the storage stability of modified asphalt binders with CaCO3 and Al2O3 nanoparticles was less than 2.5 °C, which indicates that the asphalt binder and the modifiers having great compatibility. The evaluation of the complex shear modulus of modified asphalt binders shows that the stiffness (G*) was increased with addition increase of both modifiers, and the best performance of asphalt binder was found with the addition of 5% of both nanoparticles. As a result, the use of CaCO3 and Al2O3 nanoparticles can be considered a suitable alternative additive to modify asphalt binder.
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