Zinc slag utilization as a sustainable material in pavement construction: a comprehensive review and future prospective

Abstract

As global concerns over sustainable infrastructure continue to rise, there is an increasing interest in looking into alternative materials for pavement construction. Zinc slag (ZS) has attracted interest because it has the potential to be a more affordable alternative to conventional pavement materials. This paper delves into the physical, mechanical, and chemical properties of ZS, discussing its composition and grain size distribution relevant to pavement applications. Previous studies and case studies that have utilized ZS in pavement applications were discussed. It then highlights the potential of ZS as a viable alternative by providing the opportunity for waste diversion. The utilization of ZS as a sustainable pavement material offers the potential for waste reduction, resource conservation, carbon footprint reduction and energy savings. The illustrations made in this manuscript would aid the transportation industry's efforts toward sustainable and economical construction of roads across the globe. © 2024 Elsevier Ltd. All rights reserved.