A Review On The Impact Of Nanomaterials Modification On The Performance Of Asphalt Mixtures

Abstract

Nanomaterials are emerging as potential modifiers to enhance the performance of asphalt binders and mixtures to address the growing needs for sustainable and long-lasting road infrastructure. This review presents a critical evaluation of the development of nanomaterial-modified asphalt technology, citing papers between 2015-2025. A variety of nanomaterials, such as nano-silica, carbon nanotubes, nano-clay, graphene oxide, and nano-zinc oxide, are evaluated for performance on mechanical characteristics, rutting resistance, fatigue life, and moisture sensitivity. The article also details common mixing protocols, dosage rates, and test procedures used in laboratory studies. Although these nanomaterials have shown significant performance gains, practical application is hindered by issues such as constraints in dispersion, material cost, lacking field validation, and potential environmental and health issues. The review also highlights the growing role of bio-based and waste-derived nanomaterials as more sustainable alternatives. It finally summarizes key research gaps and proposed future research areas focusing on field-scale testing, lifecycle assessment, and development of standard protocols to enable broader adoption of nanotechnology in flexible pavement systems.