Procedia Engineering · 2016 · 139 citations · 12 references
EngineeringCivil EngineeringMaterials EngineeringPavement EngineeringPolymer MaterialsRheologyAsphalt MaterialsPavement ConstructionPavement DistressesPavement Failure MechanismsPavement FatiguePavement MaterialsAsphalt BinderAsphalt Binder RheologyAsphalt RheologyComplex ModulusCrackingCracksPhase AngleRheological Properties
Seasonal temperature changes and loading variations significantly affect asphalt’s viscoelastic behavior, leading to common distresses such as rutting and fatigue cracks. The study investigates the impact of adding low‑density polyethylene, high‑density polyethylene, and crumb rubber to PG 64‑10 bitumen on asphalt performance. Complex modulus (G*) and phase angle (δ) were measured with a Dynamic Shear Rheometer to evaluate the binder’s rutting and fatigue characteristics. The modified binders exhibited markedly improved rheological properties, and recycling municipal plastic and rubber waste could alleviate environmental burdens in Saudi Arabia.
The seasonal change in temperature and loading nature has a significant effect on asphalt behavior because of its visco-elastic nature. Several types of flexible pavement failure/distress occur due to this behavior of asphalt binder, among which rutting and fatigue cracks are very common. In this study, Low Density and High Density Polyethylene and Crumb rubber were used as additions to base bitumen (PG 64-10). Complex modulus (G*) and phase angle (δ) obtained from Dynamic Shear Rheometer (DSR) are the basic perimeters used to evaluate the behavior of the binder in respect to rutting and fatigue cracking. It was concluded that Low Density Polyethylene (LDPE), High Density Polyethylene (HDPE), and Crumb Rubber (CR) modified binder showed significant improvement in rheological properties of the binder. Furthermore, recycling these municipal wastes will contribute to solving environmental problems in the Kingdom of Saudi Arabia caused by the piling up of these wastes in dumpsites.
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Taher Baghaee Moghaddam, Mehrtash Soltani, Mohamed Rehan Karim · Materials & Design (1980-2015) · 2013 · 196 citations