Oral Presentation

Volume Title: ICCE2021 Vol. 2

¹Ali Youssef Aboelmagd ; ²Mahmoud Enieb; ³Ghada Moussa; ⁴Safwan Khedr; ⁵El-Sayed M. Abd Alla

¹Civil Engineering Department, Faculty of Engineering, Assiut University, Assiut, Egypt

²Department of Civil Engineering, Assiut University, Egypt

³Department of Civil Engineering, Faculty of Engineering, University of Assiut, Assiut, Egypt

⁴Department of Construction Engineering, American University in Cairo, Cairo, Egypt

⁵Department of Civil Engineering, faculty of Engineering, Assiut University, Assiut, Egypt

This research focused on predicting the performance of modified asphalt mixtures with high contents of nano-silica fume (NSF) using AASHTOWare Pavement ME Design software, which is the production version of the Mechanistic-Empirical Pavement Design Guide (MEPDG). The NSF was completely mixed with the virgin asphalt using a high-shear mixer at 160 °C and a speed of 2000 rpm for 1 hr. The physical- rheological properties of the control binder, as well as the binders modified with 30, 40, and 50% NSF by asphalt weight, were determined. The asphalt mixtures were prepared using control and NSF-modified binders by the conventional Marshall method. The predicted field pavement performance of both the control and NSF-modified asphalt mixtures in terms of rutting, longitudinal cracking, alligator fatigue cracking at three different climatic locations in Egypt (Aswan, Cairo, and Alexandria), and three design speeds (10, 55, and 95 kph) was evaluated. The simulations indicated that the NSF-modified mixtures outperformed the control mixture.

Silica Fume; Asphalt; AASHTOWare; Pavement; Rutting; Fatigue

Transportation and Infrastructure Engineering