asphalt binder

Asphalt binder is a key ingredient in making roads and pavement, acting like a glue that holds aggregate particles—such as sand, gravel, and crushed stone—together. It is a thick, sticky, black or dark brown material derived from the refining of petroleum. The binder provides flexibility, durability, and weather resistance to the pavement, allowing it to withstand traffic loads, temperature changes, and erosion. When heated, asphalt binder flows easily to coat the aggregates evenly. Once cooled, it hardens, forming a strong, cohesive surface that supports vehicles and everyday use.