Steel Slag Is a By Product from Steelmaking Industry and Has Been Recycled In Many Countries Around the World For Decade. One of the Main Application of the Recycled Steel Slag Is Aggregate For Asphalt Pavement. This Particle Aims to Present an Overview of the Application of Steel Slag In the Pavement Industry Covering the Regulation In Different Parts of the World That Govern the Reuse of Steel Slag ,How The Properties of Steel Slag Influence the Strength and Durability of the Pavement Mixtures, and The Environmential Impact As a Result of the Reuse of Steel Slag. This Article Elaborates on Supply Chain Management Issues In Steel Slag Recycling Industry, As the Quality of Steel Slag Relies Not Only on The Treatment and Processing Technique But Also the Way the Material Are Handled Throughout Their Lifetime. This Study Is Evaluates the Used of Steel Slag Aggregate In the Proportion(Ssa) As a Substitute For Natural Aggregate In the Production of Hot Mix Plant(Hma) For Road Construction. Based on Intensive Laboratory Testing Program the the Characteristic Properties of Ssa Were Assessed to Determine Its Suitability to Be Used Hma. (Four Different Percentages (0, 50, 75, and 100) of Ssa Were Used, and the Proposed Mix Designs For Hma Were Conducted In Accordance With Marshall Mix Design. the Experiment Results Revealed That the Addition of Ssa Has a Significant Improvement on the Properties Natural Aggregate. An Increase In Density and Stability and a Reduction In Flow and Air V ...