NANO SILICA-MODIFIED ASPHALT: ENHANCING RESISTANCE TO RUTTING, CRACKING, AND MOISTURE DAMAGE

Road infrastructure durability with extended lifespan through asphalt pavement determines its potential for sustainable development. The asphalt material experiences different types of damage throughout its existence. However, fatigue cracking is combined with rutting and moisture damage, which create major pavement failures that demand ongoing maintenance efforts. The exploration of Nano Silica (NS) nanomaterial modification of asphalt represents an emerging technique to bolster the mechanical and rheological capabilities. Nano Silica shows promise as an improving agent for asphalt binders because of its tiny particles and expansive surface area, which enhances stiffness and aging resistance while boosting rutting resistance. This study investigates the effect of Nano Silica on the physical properties of asphalt mixtures. Laboratory tests such as penetration and softening point while also evaluating ductility and Marshall Stability were conducted on traditional mixtures and mixtures that included NS modification. The evaluation of Asphalt performance enhancement required the addition of Nano Silica from 1% to 5% to identify the most effective amount. Lab results confirm that Nano Silica addition results in asphalt mixtures with higher stiffness levels, better thermal stability, and stronger permanent deformation resistance. Adding NS enhances the adhesive qualities between aggregate particles and asphalt binders, thus minimizing their susceptibility to moisture damage. Research determined the best NS addition level by weighing the mixture's performance outcomes against its ability to be easily worked. Research results confirm that Nano Silica is a successful modifier for improving asphalt pavement mechanical strength and service life capabilities. This research proves that nanotechnology investigations in pavement engineering can be valuable by examining asphalt mixture development for long-term usage in busy road networks.