Impact of Sasobit on Asphalt Binder’s Performance under UAE Local Conditions

• Alaa Sukkari

  University of Sharjah

• Ghazi Al-Khateeb

  University of Sharjah

• Mohammed Wajeeh

  Al-Huda University College, Al Anbar, Iraq

• Helal Ezzat

  University of Sharjah

• Waleed Zeiada

  University of Sharjah

Asphalt pavements are the backbone of the transportation system. In light of the rising costs of energy and materials and the growing emphasis on sustainable infrastructure, there has been a push to enhance the performance of asphalt pavements. One of the primary methods for achieving this goal is the incorporation of warm mix additives into the asphalt binder. This study investigated the impact of Sasobit on the asphalt binder by adding 2% and 4% of Sasobit, by weight, to the asphalt binder. The following tests were conducted: penetration, softening point, rotational viscosity, and high-temperature performance. The results demonstrated that the addition of Sasobit at 2% and 4% concentrations resulted in a 25% and 30% reduction in penetration, respectively, accompanied by a 26% and 71% increase in the asphalt binder's softening point, as well as a 17°C and 36°C rise in the softening point, respectively. Additionally, the viscosity at 135°C and 165°C and the mix and compaction temperatures decreased by 30% and 25%, respectively. Utilizing the outcomes mentioned above, AASHTOWare simulations were conducted to assess the impact of local climate conditions and gradation. The simulations demonstrated that adding Sasobit resulted in enhanced service life, as evidenced by the International Roughness Index, permanent deformation, and bottom-up fatigue. The simulations and test results collectively indicate that Sasobit's incorporation could be advantageous for local asphalt pavements. The authors recommend further testing the effect of Sasobit on the performance of asphalt mixes in rutting, fatigue, and moisture damage.

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