Abstract
Abstract In this research study a new polymer nanocomposite was made by blending of Ethylene Vinyl Acetate, High Density Polyethylene, and Nanoclay. The base asphalt binder with grade of PG64-22 was blended with different percentages of polymer nanocomposite (0.5%, 1% and 2%) to prepare the modified asphalt binders. The performance of asphalt binders containing the polymer nanocomposite was evaluated using conventional tests (penetration, softening point and ductility) and rheological performance tests (multiple stress creep recovery, dynamic shear rheometer and bending beam rheometer). The tests results showed that regardless of linear or nonlinear viscoelastic behavior of asphalt binder, the polymer nanocomposite can improve the low temperature resistance and rutting resistance of the asphalt binder. However, the criteria of linear or nonlinear viscoelastic behavior for enhancing the rutting resistance of asphalt binders resulted in different modification trend. Since there are only a few polymers that can enhance both high and low temperatures performances of an asphalt binder, therefore the proposed polymer nanocomposite may be considered in asphalt pavement construction in regions that encounter with high temperature changes during a day or a year.
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