A study on the effect of rejuvenators in reclaimed asphalt pavement based stone mastic asphalt mixes

Springer Science and Business Media LLC - Tập 12 - Trang 9-16 - 2019
L. Durga Prashanth1, Nitendra Palankar2, A. U. Ravi Shankar3
1Dept. of Civil Engineering, R V College of Engineering, Bengaluru, India
2Dept. of Civil Engineering, Gogte Institute of Technology, Belagavi, India
3Dept. of Civil Engineering, National Institute of Technology Karnataka, Surathkal, Srinivasnagar (P.O.), Mangalore, India

Tóm tắt

The present paper focuses on the behavior of Stone Mastic Asphalt (SMA) mixes incorporating rejuvenated Reclaimed Asphalt Pavement (RAP) materials. The RAP materials were tested for its physical properties and later were rejuvenated using various rejuvenators such as waste cooking oil, waste engine oil and shredded plastics. The rejuvenated RAP materials were incorporated in the SMA mixes at various replacement levels i.e. 0%, 30%, 50% and 70% (by weight). Various binder properties such as viscosity, rheological properties and chemical composition were evaluated for the aged and rejuvenated material. The rejuvenators were incorporated at different dosage levels i.e. 2%, 4% and 6% (by weight of binder). The optimal rejuvenation dosage for each type of rejuvenator was identified and mix design for the SMA was optimized for evaluating its physical and mechanical properties. Based on the results, the optimum rejuvenator dosage was identified at 6% for waste cooking oil and waste engine oil, while 2% for shredded plastics. It was observed that the addition of rejuvenators improved the performance of RAP based SMA mixes.

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