Asphalt rejuvenators are materials applied to aged asphalt pavements to restore some of the original properties of the asphalt binder. Several testing procedures are used to determine their effectiveness. Penetration testing (ASTM D5) measures the consistency or hardness of the asphalt binder. Rejuvenators should increase the penetration value, indicating a softer binder. Viscosity testing (ASTM D4402) measures the resistance of the asphalt binder to flow at different temperatures. Rejuvenators should decrease the viscosity, indicating a more fluid binder. Dynamic Shear Rheometer ....
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