The Use of Zinc Oxide in Asphalts: Review

Zinc oxide (ZnO) is a wide-gap semiconducting material which chemically stable at high temperatures and has been shown to be compatible with asphalt binders. Additionally, nanoparticles such as ZnO could help improve urban air quality. This encouraged the use of this binder mix modifier. A review on an modifier was conducted in study. Based we carried out, following were mainly synthesized described: content modifier, mixing processes ZnO, manufacturing process modified mix, type and/or tests general conclusions, environmental effects. micro-particles increase aging resistance (mainly ultraviolet radiation (UV)). tends rutting adhesion aggregates, improving moisture damage. It also fatigue resistance. At low service temperatures, performance unclear, further studies should performed. Few have evaluated effect environment when it used Future evaluate technology environment, perform economic analyses, physical–chemical interaction aggregate, measure long-term properties mixtures. viewed environmentally friendly promising binders for pavement construction.