Nano-Silica modifier asphalt concrete under rutting resistance and shape memory component

• Main Authors: Putra Jaya, Ramadhansyah, A. A., Mohammed, Mwangi, P. M., M. P., Anwar, Leong, Lau Teck, Jayaprakash, Jaganathan, Z. F., Mohamed Jaafar, Mashros, N.
• Format: Conference or Workshop Item
• Language: English
• Published: IOP Publishing Ltd 2021
• Subjects: TE Highway engineering. Roads and pavements
• Online Access: http://umpir.ump.edu.my/id/eprint/30833/1/Nano-Silica%20modifier%20asphalt%20concrete%20under%20rutting%20resistance.pdf; http://umpir.ump.edu.my/id/eprint/30833/; https://doi.org/10.1088/1755-1315/682/1/012041
• Institution: Universiti Malaysia Pahang

Permanent deformation is pavement distress that has been the root cause of failure of roads globally. With the formation of a rut, follows cracking which inevitably damages the asphalt and sub-base layers. To curb the rutting distress, this study investigates the use of nanosilica, miniaturized silica particles to the power of 10-9 to modify the binder of the asphalt concrete. The nano-silica was added at 4%, 6% and 15% by weight of bitumen into the asphalt mixture. Marshall Mix design method was used to prepare the forty-eight samples used in the study. Repeated Load Permanent Deformation (RLPD) test and Shape Memory (SM) were performed at two temperatures (25°C and 40°C). It was found that the rutting resistance and shape memory had the best performance with the addition of 15% nano-silica at 40°C. Addition of nano-silica at 15% by weight of bitumen had the best amelioration of not only permanent deformation resistance but also shape retention thus enhancing pavement performance.