Performance evaluation of dense graded emulsion mixes with rejuvenated reclaimed asphalt pavement

Abstract

The current investigation presents a comparative study on the laboratory performance of dense graded emulsion mixes prepared with 100% virgin aggregates and 100% Recycled Asphalt Pavement (RAP) with and without a rejuvenator. Waste Engine Oil (WEO) was used as the rejuvenator in the current study. Cold mix design was carried out using a slow-setting type II (SS-2) emulsion. Further, the mechanical and performance properties of various cold emulsion mixes were evaluated. The mechanical properties of cold mixes such as the Indirect Tensile Strength and Resilient Modulus were determined. Rutting and cracking performance were evaluated in terms of the dynamic creep test and indirect tensile asphalt cracking test (IDEAL-CT) respectively. It was observed that the mix prepared with 100% RAP without rejuvenator exhibited a similar rutting performance, a much higher cracking tolerance and low moisture susceptibility compared to the mix with 100% fresh aggregates. The addition of the rejuvenator resulted in improved moisture resistance and cracking tolerance of the cold mix and decreased the rut resistance.

KEYWORDS:

• Recycled Asphalt Pavement
• Cold Emulsion Mix
• Rejuvenator
• Resilient Modulus
• Permanent Deformation
• Cracking Resistance

Disclosure statement

No potential conflict of interest was reported by the author(s).