Performance of porous asphalt with nanosilica modified asphalt binder / Khairil Azman Masri

Porous asphalt (PA) is a flexible pavement layer with high interconnected air voids and constructed using open-graded aggregates. Due to high temperature environment and increased traffic volume in Malaysia, PA may have deficiencies particularly in rutting and stiffness of the mix. A possible way to improve these deficiencies is to improve the asphalt binder used. Binder is normally modified using polymer materials to improve its properties. However, nanotechnology presently is being gradually used for asphalt modification. Nanosilica (NS), a by product of rice husk and palm oil fuel ash was used as additive in this study. The aim of this study was to enhance the rutting resistance and stiffness performance of PA using NS. This study focused on the performance of PA with NS-modified binder (NS-MB) to produce better and more durable PA.